Telecentric System Patents (Class 359/663)
  • Patent number: 6980366
    Abstract: A spatial light modulator has pixel sections for performing spatial light modulation of light. An image-side telecentric image forming optical system forms an image of a two-dimensional pattern of the light having been obtained from the spatial light modulation. A microlens array having microlenses arrayed in two-dimensional directions is located in the vicinity of a plane of image formation of the two-dimensional pattern, whose image is formed by the image forming optical system. A magnification adjusting optical system for adjusting a magnification of image formation at the time of the formation of the image of the two-dimensional pattern of the light with the image forming optical system is located between the image forming optical system and the microlens array.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: December 27, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hiromi Ishikawa
  • Patent number: 6980249
    Abstract: Focused imaging of constant size and resolution over a wide range of distances and a wide field of view in object space is provided by a doubly telecentric catadioptric optical system including an external limiting aperture at the juncture of the focal planes of two objectives, with a large-diameter concave spherical or aspheric mirror as the primary objective, and a camera lens as the secondary objective. Constant resolution avoids rescaling of images made at different depths for machine recognition tasks such as OCR, saving computation time and cost, and increasing through-put and accuracy. For digital linescan cameras, constant resolution of the image avoids scanning objects at different line rates for different depths of objects being scanned, thus maximizing speed of the objects and, hence, throughput. The field of view is constant over the entire range of depth and is not limited by the diameter of the camera lens elements.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: December 27, 2005
    Assignee: Lockheed Martin, Corporation
    Inventor: Lawrence E. Albertelli
  • Patent number: 6952231
    Abstract: The invention relates to an apparatus based on the telecentric imaging system for forming an image of a linear zone (17) of an object (1). The apparatus comprises a non-telecentric camera (9) consisting of an objective (8) and an image plane (19) formed by a row of photosensitive cells (15) as well as telecentric imaging means (18) between the objective and the object. The telecentric means comprise a concave strip mirror (6), which is aligned with said row of cells and with the aperture of said objective located in its focal plane, as well as a strip-like plane mirror (5) between the parabolic mirror and the objective, whereby the radiation being reflected from the objective continues via the parabolic mirror and the planar mirror further to the objective and from there to the image plane. In the apparatus there is further a scattered light source (7) which lightens the object. The apparatus is adapted for measuring the dimensions of the width parts of the object.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: October 4, 2005
    Assignee: Oy Ekspansio Engineering Limited
    Inventors: Jyri Paavola, Lasse Lindström
  • Patent number: 6934089
    Abstract: An objective lens system (2), particularly for a fingerprint reader apparatus, said lens system (2) comprising a first lens (8) formed as a condensing lens guiding light beams arriving from an object generally telecentrically, an aperture stop (9) having a centre (P) and being located in the vicinity of a focal point of the first lens (8), a correcting second lens (10) arranged between the first lens (8) and the aperture stop (9) and juxtaposed with the aperture stop (9), and a correcting third lens (11) formed as a condensing lens and arranged beside the aperture stop (9) opposite the second lens (10).
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: August 23, 2005
    Assignee: Guardware Systems Informatikai Kft.
    Inventor: Péter Kalló
  • Patent number: 6927924
    Abstract: An imaging optical instrument causes light emitted from a plurality of light sources arranged adjacent an object to image on recording surfaces of a photosensitive or thermosensitive material. The optical instrument includes a two-sided telecentric optical system having a first lens disposed adjacent an entrance end of a lens barrel, and a second lens disposed adjacent an exit end of the lens barrel, and an aperture stop disposed adjacent a meeting point of a rearward focus of the first lens and a forward focus of the second lens. The aperture stop has an aperture formed centrally thereof for allowing passage of beams that should contribute to image formation, and a refracting portion surrounding the aperture for refracting beams that should be intercepted and causing these beams to leave the lens barrel from the exit end thereof.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: August 9, 2005
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventor: Kenji Ueyama
  • Patent number: 6917479
    Abstract: The present invention is directed to a photographing lens containing, in order from an object side: a first lens having a positive refractive power and a convex surface facing the object side; a second lens having a negative refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power and at least one aspheric surface, the photographing lens satisfying the following conditional expressions: L T f ? 1.2 0.5 ? f 3 f ? 1.0 where LT denotes the distance on the optical axis between the object side of the first lens and the image side of the fourth lens; f denotes the total focal length of the photographing lens; and f3 denotes the focal length of the third lens.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: July 12, 2005
    Assignee: Samsung Techwin Co., Ltd.
    Inventor: Young-Woo Park
  • Patent number: 6912095
    Abstract: A compact and light-weighted projection lens system that is capable of projecting an image at an angle as wide as 75 degrees with sufficient field angle and brightness as represented by F number of approximately 2.4, that is capable of effectively correcting chroic aberration of magnification and aberration of distortion and exhibiting optical stability against environmental variations, and that is suitable for obtaining an extraordinarily fine image by the magnification and projection.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: June 28, 2005
    Assignee: Tamron Co., Ltd.
    Inventor: Yasuharu Yamada
  • Patent number: 6876494
    Abstract: In an image forming apparatus: pixel portions of a spatial light-modulation element are two-dimensionally arranged, and individually modulate portions of light applied to the spatial light-modulation element, according to control signals; a first image-forming optical system is arranged in optical paths of the portions of the light modulated by the pixel portions; a microlens array is arranged in a vicinity of an image-forming plane of the first image-forming optical system, and has microlenses arranged in correspondence with the pixel portions, respectively; and a second image-forming optical system is arranged in optical paths of the portions of the light which have passed through the microlenses, and forms on a predetermined surface an image represented by the portions of the light-modulated by the spatial light-modulation element. Each of the first and second image-forming optical systems forms an image with a magnification power greater than one.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: April 5, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiromi Ishikawa, Kazuhiko Nagano
  • Patent number: 6856466
    Abstract: A series of optical elements is used to produce multiple simultaneous adjoining images on a single image plane. A first, intermediate, image is produced using the first telecentric imaging lens. This intermediate image is produced at a plane coincident with an adjustable-size rectangular field stop. The rectangular field stop is mounted in a sub-housing that allows its free rotation. A second telecentric lens collimates the light from the intermediate image. This collimated light is next passed through an optical splitting means, which uses the principal of refraction to separate the light into multiple components. The optical splitting means is mounted in a sub-housing that allows its free rotation. From here, the light next passes through a third and final lens, which produces a second, final, image on a single, planar detection device. The final image consists of a plurality of identical copies of the intermediate image.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: February 15, 2005
    Assignee: Science & Engineering Associates, Inc.
    Inventor: Michael D. Tocci
  • Patent number: 6853493
    Abstract: Projection lenses for use with pixelized panels (PP) are provided. The projection lenses have a negative first unit (U1) separated from a positive second unit (U2) by a reflective surface (RS) which folds the lens' optical axis. The lenses are telecentric on the short conjugate side, have a large field of view in the direction of the long conjugate, and have low aberration levels, including, in particular, low levels of lateral color.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: February 8, 2005
    Assignee: 3M Innovative Properties Company
    Inventor: Melvyn H. Kreitzer
  • Patent number: 6847494
    Abstract: An optical magnifier is provided. One general form of one example embodiment includes two lens elements, at least two aspheric surfaces, and at least one diffractive surface. Another general form of another example embodiment includes three lens elements, and at least three aspheric surfaces. At least two of the aspheric surfaces can be simple conics. The optical magnifier, suitable for use in an electronic display system, has an apparent field of view of at least +/?10 degrees; a magnification of at least 15×; a back focal length of at least 5 mm; and an eye relief greater than the effective focal length of the optical magnifier. The lens elements can be made from plastic.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: January 25, 2005
    Assignee: Eastman Kodak Company
    Inventor: Scott C. Cahall
  • Patent number: 6839179
    Abstract: An optical imaging system with a first imaging lens, a field stop, and a second imaging lens configured to reduce the amount of dead space between images of samples.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: January 4, 2005
    Assignee: Applera Corporation
    Inventor: Steven J. Boege
  • Publication number: 20040223229
    Abstract: A spatial light modulator has pixel sections for performing spatial light modulation of light. An image-side telecentric image forming optical system forms an image of a two-dimensional pattern of the light having been obtained from the spatial light modulation. A microlens array having microlenses arrayed in two-dimensional directions is located in the vicinity of a plane of image formation of the two-dimensional pattern, whose image is formed by the image forming optical system. A magnification adjusting optical system for adjusting a magnification of image formation at the time of the formation of the image of the two-dimensional pattern of the light with the image forming optical system is located between the image forming optical system and the microlens array.
    Type: Application
    Filed: May 5, 2004
    Publication date: November 11, 2004
    Inventor: Hiromi Ishikawa
  • Patent number: 6813088
    Abstract: A projection optical system that is telecentric or very nearly telecentric on both sides is formed of four positive lens groups with a central diaphragm for achieving at least very nearly unity magnification. The second and third lens groups are movable along the optical axis of the projection optical system, preferably at the same rate and in the same direction, in order to vary the magnification of the projection optical system. The range of movement of the second and third lens groups includes a position where the first and second lens groups together are a mirror image about the plane of the diaphragm of the third and fourth lens groups together. A projection exposure device uses the projection optical system to form an image of an illuminating beam modulated by a mask pattern on a workpiece. An image magnification detector controls movement of the second and third lens groups.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: November 2, 2004
    Assignee: Fuji Photo Optical Co., Ltd.
    Inventor: Ryoko Otomo
  • Publication number: 20040212897
    Abstract: A dispersive optical element and positionable micromirrors are deployed to implement a configurable wavelength routing device for add/drop and other applications. Input light is dispersed and imaged onto a focal plane where there is disposed an array of light redirection elements operative to decenter wavelengths on a selective basis. In the preferred embodiment, the dispersive optical element is a grating or grating/prism featuring a high degree of dispersion allowing the input and return paths to be parallel and counter-propagating, both for a compact size and to facilitate a lateral shifting in a localized area. The inputs and outputs may be implemented in conjunction with optical fibers, with a lens being used to collimate light prior to illumination of the grating. A focusing lens is preferably used to form a nominally telecentric image of the dispersed spectrum at the image plane.
    Type: Application
    Filed: June 12, 2003
    Publication date: October 28, 2004
    Inventor: James M. Tedesco
  • Patent number: 6775069
    Abstract: The present invention relates to an illumination system including an illumination source, a beam conditioner placed in an optical path with the illumination source, a first diffractive array, a condenser system and a second diffractive array. The illumination source directs light through the beam conditioner onto the first diffractive array. The light is then directed to the condenser system placed in an optical path between the first diffractive array and second diffractive array. The condenser system includes a plurality of stationary optical elements and a plurality of movable optical elements. The plurality of movable optical elements are placed in an optical path with the plurality of stationary optical elements. The movable optical elements are capable of translation between the plurality of stationary optical element to zoom the light received from the first diffractive array.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: August 10, 2004
    Assignee: ASML Holding N.V.
    Inventors: Mark Oskotsky, Lev Ryzhikov, Scott Coston, James Tsacoyeanes, Peter J. Baumgartner, Walter Augustyn
  • Publication number: 20040145817
    Abstract: In the beam path of an Optical Cross Connect between the front face of a fiber block and a moveable mirror array are placed a telecentric lens and multi-surface optical element. The lens is placed adjacent the front face with a front focal plane coinciding with the front face. The substantially parallel beam path axes between the front face and the telecentric lens are converted by the lens into dispersing directions towards the optical element. Discrete optical surfaces of the optical element redirect the dispersing beam paths in a fashion such that the beam paths coincide in the following with corresponding moveable mirrors of a mirror array. Pitches of arrayed fiber ends and of the optical surfaces as well as the moveable mirrors are independently selectable. The telecentric lens simultaneously focuses the signal beams with improved beam separation and reduced signal loss.
    Type: Application
    Filed: January 29, 2003
    Publication date: July 29, 2004
    Inventors: Dmitry V. Bakin, Cheng-Chung Huang
  • Patent number: 6707617
    Abstract: A telecentric lens system including a front lens unit, a rear lens unit that is disposed so that the front focal point of the rear lens unit coincides with the back focal point of the front lens unit, and a diaphragm mechanism that is disposed at the location where the back focal point of the front lens unit and the front focal point of the rear lens unit coincide. The diaphragm mechanism includes a numerical aperture changer for changing the numerical aperture of the diaphragm mechanism. By changing the numerical aperture, the telecentric lens system can be used in a wide range of applications from observations requiring a large focal depth to observations requiring high resolution. The telecentric lens system that can be used in observations for a wide range of applications and an image measuring device including the telecentric lens system.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: March 16, 2004
    Assignee: Mitutoyo Corporation
    Inventor: Kenji Okabe
  • Patent number: 6639653
    Abstract: A double telecentric objective lens includes a front group and a rear group each having a positive refracting power as a whole. The front group includes a first unit and a second unit. The first unit is formed of a cemented lens composed of a convex lens and a concave lens. The second unit includes a convex lens or a cemented lens composed of a convex lens and a concave lens, and a concave lens. The rear group includes a third unit and a fourth unit. The third unit includes a concave lens and a cemented lens composed of a convex lens and a concave lens. The fourth unit is formed of a cemented lens composed of a convex lens and a concave lens. In the above configuration, the optical constants of the lenses are determined so as to satisfy the following conditions: n1n−n1p>0.1  (1) &ngr;1p−&ngr;1n>25  (2) 0.3 fF−r2n<0.5 fF  (3) 1.4<(r2p/r2n)<2.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: October 28, 2003
    Assignee: Mitutoyo Corporation
    Inventors: Tatsuya Nagahama, Katsuyoshi Arisawa
  • Patent number: 6621555
    Abstract: A projection exposure apparatus includes a projection optical system for projecting a pattern of a reticle onto a photosensitive substrate. The projection optical system includes at least three lens units, including a lens unit of a positive refractive power and a lens unit of a negative refractive power, and an aspherical lens having aspherical surfaces formed on both sides thereof, in which a relation |Lxø0|>17 is satisfied, where L is a conjugate distance of the projection optical system and ø0 is the total power of the negative lens unit or of negative lens units of the projection optical system. Each aspherical surface of said aspherical surface lens is disposed at a position satisfying a relation |hb/h|>0.36 where h is a height of an axial marginal light ray, and hb is a height of a most abaxial chief ray, and each aspherical surface of the aspherical surface lens satisfies a relation |&Dgr;ASPH/L|>1.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: September 16, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Chiaki Terasawa, Hiroyuki Ishii, Takashi Kato
  • Patent number: 6614539
    Abstract: A bilaterally conjugate telecentric optical system has, sequentially from one conjugate side, a first lens unit in the form of an afocal optical system including sequentially from one conjugate side a first subunit having positive optical power and a second subunit having positive optical power, and having an aperture stop fixed in the optical axis direction at the focal position on the back side of the first subunit; and a second lens unit in the form of an afocal optical system that is movable in the optical axis direction to adjust the focus while maintaining a telecentric state.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: September 2, 2003
    Assignee: Minolta Co., Ltd.
    Inventor: Yoshie Shimizu
  • Patent number: 6587279
    Abstract: A projection zoom lens system according to the present invention has a substantially telecentric incidence side and comprises a plurality of lens groups for behaving differently between a wide-angle end and a telephoto end, wherein at least one of two surfaces of a lens included in a first lens group located closest to a screen side has an aspheric surface. Since the lens closest to the screen has the largest diameter and the density of light rays becomes smallest among the lenses, it is possible to design the aspheric surface for correcting properly the light rays and reduce the correcting loads of the other lens groups constituting the projection zoom lens system so as to provide the compact and high performance zoom lens system.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: July 1, 2003
    Assignee: Nittoh Kogaku K.K.
    Inventors: Shuji Narimatsu, Akira Sawamoto
  • Patent number: 6577455
    Abstract: A wide angle projection lens consists of a Gnp lens group having positive refractive power and a Gf lens group having positive refractive power in the order from a large conjugate side toward a small conjugate side, and further the Gnp lens group consists of a Gn lens group having negative refractive power and a Gp lens group having positive refractive power in the order from the large conjugate side toward the small conjugate side, while satisfying −1.8<fn/f<−1.1, 3.2<fp/f<5.5, 1.2<Dnp/f<2.4 and 2.8<ff/fnp<4.4, where f: focal length of the whole lens system, fn: focal length of the Gn lens group, fp: focal length of the Gp lens group, Dnp: air spacing between the Gn lens group and the Gp lens group, fnp: focal length of the Gnp lens group and ff: focal length of the Gf lens group.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: June 10, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Shinsuke Shikama
  • Publication number: 20030103268
    Abstract: A zoom lens system has, from an enlargement side, a first lens unit having a negative optical power, a second lens unit having a positive optical power and disposed on the image side of the first lens unit with a first variable distance secured in between, a third lens unit having a positive optical power and disposed on the image side of the second lens unit with a second variable distance secured in between, a fourth lens unit having a negative optical power, disposed on the image side of the third lens unit with a third variable distance secured in between, and including an aperture stop, a fifth lens unit having a positive or negative optical power and disposed on the image side of the fourth lens unit with a fourth variable distance secured in between, and a sixth lens unit having a positive optical power and disposed on the image side of the fifth lens unit with a fifth variable distance secured in between. Zooming is achieved by varying the first to fifth variable distances.
    Type: Application
    Filed: May 16, 2002
    Publication date: June 5, 2003
    Inventors: Jun Nishikawa, Tomoko Nakagawa
  • Patent number: 6563653
    Abstract: An electronic imaging system is disclosed, for assessing the intensity of colorimetric, fluorescent or luminescent signal in a matrix consisting of wells, microwells, hybridization dot blots on membranes, gels, or other specimens. The system includes a very sensitive area CCD detector, a fast, telecentric lens with epi-illumination, a reflective/transmissive illumination system, an illumination wavelength selection device, and a light-tight chamber. A computer and image analysis software are used to control the hardware, correct and calibrate the images, and detect and quantify targets within the images.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: May 13, 2003
    Assignee: Imaging Research, Inc.
    Inventors: Peter Ramm, Gang Sun, Rolf Mueller, Timothy Ormsby, Kenneth R. Castle
  • Patent number: 6563650
    Abstract: Telecentric projection lenses for use with pixelized panels (PP) are provided. The projection lenses have a negative first unit (U1) which has at least one negative meniscus element (N1) having at least one aspheric surface and a positive second unit (U2) which has at least one positive element (P1) having at least one aspheric surface. The lens' aperture stop (AS) is located between the two units, and a third lens unit (U3) may be used in the vicinity of the aperture stop to improve the correction of axial color. The lenses have small forward vertex distances, small clear apertures, and long back focal lengths which make them particularly well-suited for use in the manufacture of compact projection systems.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: May 13, 2003
    Assignee: 3M Innovative Properties Company
    Inventor: Jacob Moskovich
  • Publication number: 20030086624
    Abstract: A new and useful method and system for correcting for ghost images in a telecentric optical system is provided. Ghost images generated from planar optical surfaces in the image space after the major elements of a telecentric optical system are shift invariant. In other words the ghost images produced by these optical elements do not change their shape with different field angles or points. The ghost image's invariance with field position will allow the ghost image to be subtracted or removed from the image of an object recorded on a digital detector such as CCD or CMOS detector when its optical system is telecentric in image space. This subtraction may be accomplished, for example, with a removal technique using a measured ghost function germane and invariant to that particular optical system. The combination of the ghost image and scatter functions is linearly shift invariant and therefore, both noise contributions could be removed from the resulting digital image using similar removal techniques.
    Type: Application
    Filed: November 8, 2001
    Publication date: May 8, 2003
    Inventor: Kevin J. Garcia
  • Patent number: 6535249
    Abstract: An optical system for detecting image light in a digital camera includes an electronic sensor having an area array of pixels for detecting the image light. A field lens is positioned adjacent the electronic sensor so as to be substantially in the path of the image light for directing the image light onto the area array of pixels. The field lens straightens the image light so that the straightened image light rays are substantially parallel to an optical axis of the digital camera.
    Type: Grant
    Filed: November 3, 1998
    Date of Patent: March 18, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Donald J. Stavely
  • Publication number: 20030048547
    Abstract: Projection exposure device and also projection objective with a lens arrangement which has at least one lens group of negative refractive power, this lens group comprising at least four lenses of negative refractive power, and a lens of positive refractive power being arranged after the third lens of negative refractive power in this lens group.
    Type: Application
    Filed: March 8, 2002
    Publication date: March 13, 2003
    Inventor: Karl-Heinz Schuster
  • Publication number: 20030030915
    Abstract: A light filtering assembly for filtering an input beam of light having a plurality of desired wavelength components and a plurality of unwanted wavelength components so as to provide an output beam having only the desired wavelength components. The filtering assembly comprises an input section, a filtering section, and an output section. The input section divides the input beam into a plurality of polarized beamlets that travel along a corresponding plurality of spatially separated beam paths. The polarized beamlets comprise a plurality of desired beamlets corresponding to the desired wavelength components of the input beam and a plurality of unwanted beamlets corresponding to the unwanted wavelength components of the input beam. The filtering section is disposed in the paths of the beamlets so that the desired beamlets are passed and the unwanted beamlets are blocked.
    Type: Application
    Filed: May 13, 2002
    Publication date: February 13, 2003
    Inventors: Jaymin Amin, Eliseo Romolo Ranalli, Bradley A. Scott, John P. Kondis
  • Publication number: 20030011890
    Abstract: A telecentric zoom lens having telecentric forming aperture optically and preferably mechanically intermediate an objective lens and a zoom group. The aperture is fixed along an optical axis and selected to provide a constant speed on an image side of the lens system. The location of the aperture relative to the zoom group maintains telecentricity of the lens in object space.
    Type: Application
    Filed: April 9, 2001
    Publication date: January 16, 2003
    Inventors: Mark C. Sanson, J. Robert Zinter
  • Publication number: 20030007254
    Abstract: A series of optical elements is used to produce multiple simultaneous adjoining images on a single image plane. A first, intermediate, image is produced using the first telecentric imaging lens. This intermediate image is produced at a plane coincident with an adjustable-size rectangular field stop. The rectangular field stop is mounted in a sub-housing that allows its free rotation. A second telecentric lens collimates the light from the intermediate image. This collimated light is next passed through an optical splitting means, which uses the principal of refraction to separate the light into multiple components. The optical splitting means is mounted in a sub-housing that allows its free rotation. From here, the light next passes through a third and final lens, which produces a second, final, image on a single, planar detection device. The final image consists of a plurality of identical copies of the intermediate image.
    Type: Application
    Filed: July 2, 2002
    Publication date: January 9, 2003
    Applicant: Science & Engineering Associates, Inc.
    Inventor: Michael D. Tocci
  • Patent number: 6476962
    Abstract: A multi-beam zoom lens for producing variable spot sizes on a photosensitive medium from a plurality of individually modulated light sources wherein each light source emits a light beam parallel to each of the other light sources and parallel to an optical axis and wherein a numerical aperture of each of said light beams is greater than 0.125, comprising an afocal zoom lens (10). The afocal zoom lens comprises a first moving group of lenses (13), a second group of moving lenses (14), and a third group of moving lenses (15). A constant barrel length of the afocal zoom lens is less than 160 mm and the zoom lens has a constant distance from the light sources to the photosensitive medium of less than 180 mm. The zoom lens has an afocal magnification of at least 45% across a zoom range.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: November 5, 2002
    Assignee: Eastman Kodak Company
    Inventor: Michael E. Harrigan
  • Patent number: 6476976
    Abstract: A multiple element color-corrected doubly telecentric lens and imaging system useful for imaging multiwell plates is described. The lens contains a biconvex field lens element L1, a positive meniscus lens element L2, concave toward the incident light side, a double-Gauss lens element group, a positive meniscus lens element L10, convex toward the incident light, a positive meniscus lens element L11, convex toward the incident light, and a plano concave field flattener lens element L12, concave toward the incident light side. The lens is very sensitive, and can be used to image scintillation proximity assays in multiwell plates.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: November 5, 2002
    Assignee: Affymax Research Institute
    Inventors: Haim Kedar, Edward Perry Wallerstein, Albert William Brown, Jr.
  • Publication number: 20020159162
    Abstract: An electronic imaging system is disclosed, for assessing the intensity of calorimetric, fluorescent or luminescent signal in a matrix consisting of wells, microwells, hybridization dot blots on membranes, gels, or other specimens. The system includes a very sensitive area CCD detector, a fast, telecentric lens with epi-illumination, a reflective/transmissive illumination system, an illumination wavelength selection device, and a light-tight chamber. A computer and image analysis software are used to control the hardware, correct and calibrate the images, and detect and quantify targets within the images.
    Type: Application
    Filed: May 3, 2002
    Publication date: October 31, 2002
    Applicant: IMAGING RESEARCH, INC.
    Inventors: Peter Ramm, Gang Sun, Rolf Mueller, Timothy Ormsby, Kenneth R. Castle
  • Publication number: 20020141072
    Abstract: Telecentric projection lenses for use with pixelized panels (PP) are provided. The projection lenses have a negative first unit (U1) which has at least one negative meniscus element (N1) having at least one aspheric surface and a positive second unit (U2) which has at least one positive element (P1) having at least one aspheric surface. The lens' aperture stop (AS) is located between the two units, and a third lens unit (U3) may be used in the vicinity of the aperture stop to improve the correction of axial color. The lenses have small forward vertex distances, small clear apertures, and long back focal lengths which make them particularly well-suited for use in the manufacture of compact projection systems.
    Type: Application
    Filed: January 17, 2001
    Publication date: October 3, 2002
    Inventor: Jacob Moskovich
  • Patent number: 6457829
    Abstract: A transparent member having refractive power as a result of curved surface thereon is used in one or more light paths of a three-color projection device in order to correct for the lateral color aberration of the projection lens. The transparent member is positioned between one or more optical modulation element(s) and the beam combining prism of a prism optical system, or alternatively, is on or affixed to the beam combining prism surface. When correcting an image that is enlarged by the projection lens, the curved surface of the transparent member should be convex and positioned on the side of the transparent member nearest the display panels. The focal length of a correction lens that optimally corrects the lateral color of the projection lens depends on the maximum image height at the image input display panel, the lateral color aberration generated by the projection lens, and the air conversion length from the image input display panel to the on axis position of the curved surface.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: October 1, 2002
    Assignee: Fuji Photo Optical Co., Ltd.
    Inventors: Kimiaki Nakazawa, Kenzo Sado
  • Publication number: 20020131183
    Abstract: An electronic imaging system is disclosed, for assessing the intensity of calorimetric, fluorescent or luminescent signal in a matrix consisting of wells, microwells, hybridization dot blots on membranes, gels, or other specimens. The system includes a very sensitive area CCD detector, a fast, telecentric lens with epi-illumination, a reflective/transmissive illumination system, an illumination wavelength selection device, and a light-tight chamber. A computer and image analysis software are used to control the hardware, correct and calibrate the images, and detect and quantify targets within the images.
    Type: Application
    Filed: March 5, 2002
    Publication date: September 19, 2002
    Inventors: Peter Ramm, Gang Sun, Rolf Mueller, Timothy Ormsby, Kenneth R. Castle
  • Patent number: 6452728
    Abstract: A retrofocus lens system has a negative first, a positive second and a positive third lens group. The first lens group includes an aspheric first lens, a negative meniscus second and third lenses that are convex on the large conjugate side, and a negative meniscus fourth lens being convex on the small conjugate side. The second lens group includes a positive fifth lens and a sixth lens joined to the fifth lens. The third lens group includes a positive meniscus seventh lens being convex on the small conjugate side, a biconcave eighth lens, a positive ninth lens joined to the eighth lens, a biconvex tenth and eleventh lenses, and an aspheric twelfth lens. The system satisfies 0.8<f2/f3<1.5, 1.6<|f1|/f<2.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: September 17, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Shinsuke Shikama
  • Patent number: 6417972
    Abstract: A high-resolution variable focus lens system that has an extra-long back focal length with a telecentric design. The lens system includes three groups of lenses between an object (screen) and an image (a liquid crystal panel). The first group of lenses, comprising three lenses and having a negative power, is used for focusing and zooming of the lens system. The second group of lenses, comprising two lenses and having also a negative power, is used for zooming of the lens system. The third group of lenses, comprising six lenses and having a positive power, is similarly used for zooming of the lens system.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: July 9, 2002
    Assignee: Industrial Technology Research Institute
    Inventors: Feng-Chao Chung, Fu-Ming Chuang
  • Publication number: 20020067550
    Abstract: An illumination apparatus that can adjust telecentricity of beams on a wafer without reducing the use efficiency of light is provided. The illumination apparatus moves an inner surface reflection type optical integrator in a direction orthogonal to an optical axis, and thus shifts light intensity distribution on a light emission surface thereof, thereby shifting the baricenter of the light intensity distribution on a light incident surface of multi-beam generation means. Therefore, the telecentricity of image-forming beams on the axis may be adjusted.
    Type: Application
    Filed: August 1, 2001
    Publication date: June 6, 2002
    Inventor: Satoru Mizouchi
  • Patent number: 6362922
    Abstract: Projection lenses and projection lens systems are telecentric between an illumination subsystem and a set of imagers. The lenses and systems can exhibit color fringing correction, uniform imager illumination, athermalization, and component articulation for improved imaging. The lenses and systems may be employed in display apparatuses, such as folded display apparatuses that have decreased footprint size, but long effective projection lengths.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: March 26, 2002
    Assignee: Compaq Computer Corportion
    Inventors: Biljana Tadic-Galeb, Robert E. Fischer, David Kappel, Neil L. Condra, Ann M. Muscato, Sean M. Donnelly
  • Patent number: 6339503
    Abstract: An optical system for imaging an array of light sources includes an array of microlenses disposed to intercept light from respective light sources in the array of light sources to reduce the divergence angles of light emanating from the light sources, a first array of lenses (sometimes referred to as minilenses), a second array of lenses (minilenses), and an additional array of microlenses disposed to intercept and focus light from the second array of lenses. Each lens in the first array is sized to intercept light from a respective sub-plurality of the microlenses, and each lens in the second array intercepts and focuses light from a respective lens in the first array. The first and second arrays of minilenses are preferably configured to define a doubly-telecentric imaging system.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: January 15, 2002
    Assignee: Oni Systems Corp.
    Inventors: Matthew W. Derstine, Suzanne Wakelin, James S. Wong
  • Publication number: 20020003669
    Abstract: A multiple element color-corrected doubly telecentric lens and imaging system useful for imaging multiwell plates is described. The lens contains a biconvex field lens element L1, a positive meniscus lens element L2, concave toward the incident light side, a double-Gauss lens element group, a positive meniscus lens element L10, convex toward the incident light, a positive meniscus lens element L11, convex toward the incident light, and a plano concave field flattener lens element L12, concave toward the incident light side. The lens is very sensitive, and can be used to image scintillation proximity assays in multiwell plates.
    Type: Application
    Filed: July 10, 2001
    Publication date: January 10, 2002
    Inventors: Haim Kedar, Edward Perry Wallerstein, Albert William Brown
  • Patent number: 6324016
    Abstract: A reflective telecentric lens which uses an on-axis type concave mirror in a pseudo-off-axis manner to avoid blockage of a portion of the field of view. The concave mirror used in a pseudo-off-axis manner permits the telecentric stop, imaging lens, and film or an electronic detector to be moved outside of the field of view.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: November 27, 2001
    Inventor: Spencer D. Luster
  • Patent number: 6307682
    Abstract: The present invention provides an illumination system for varying the size of an illumination field incident to a scattering optical element. The illumination field is subsequently imaged to a reticle in a photolithographic process. The illumination system includes, in series along an optical axis of the illumination system, an optical source, a beam conditioner, a first optical integrator, a first or input collimating lens, a zoom array integrator (ZAI), a second or output collimating lens, the optical scattering element, a relay lens, and the reticle. The ZAI includes an assembly of fixed and moveable lens components arranged to vary the size of the illumination field throughout a zoom range of the ZAI while maintaining telecentric illumination at a substantially fixed numerical aperture. Illumination telecentricity and substantially fixed numerical apertures are maintained at both the scattering optical element and the reticle throughout the zoom range.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: October 23, 2001
    Assignee: Silicon Valley Group, Inc.
    Inventors: Jeffrey M. Hoffman, Joseph M. Kunick, Mark Oskotsky, Lev Ryzhikov
  • Publication number: 20010028510
    Abstract: An electronic imaging system is disclosed, for assessing the intensity of calorimetric, fluorescent or luminescent signal in a matrix consisting of wells, microwells, hybridization dot blots on membranes, gels, or other specimens. The system includes a very sensitive area CCD detector, a fast, telecentric lens with epi-illumination, a reflective/transmissive illumination system, an illumination wavelength selection device, and a light-tight chamber. A computer and image analysis software are used to control the hardware, correct and calibrate the images, and detect and quantify targets within the images.
    Type: Application
    Filed: May 10, 2001
    Publication date: October 11, 2001
    Applicant: IMAGING RESEARCH, INC.
    Inventors: Peter Ramm, Gang Sun, Rolf Mueller, Timothy Ormsby, Kenneth R. Castle
  • Patent number: 6292306
    Abstract: A telecentric imaging lens system and video camera are mounted above a work support for reciprocation toward and away from an object positioned for inspection on the support. The system includes a lens barrel having therein a plurality of lenses and an adjustable iris diaphragm for projecting an image of an object from a stop opening in the diaphragm to an image inlet end of a zoom lens housing having an image outlet end connected to the camera to transmit the image of an inspected object to an image plane in the camera. The zoom lens housing has therein a plurality of movable zoom lens groups for projecting a magnified image of the object to the image plane in the camera; and the zoom lens groups are adjustable axially of the housing to alter the magnification of the image projected to the camera.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: September 18, 2001
    Assignee: Optical Gaging Products, Inc.
    Inventor: Ellis Betensky
  • Publication number: 20010019454
    Abstract: Projection lenses and projection lens systems are telecentric between an illumination subsystem and a set of imagers. The lenses and systems can exhibit color fringing correction, uniform imager illumination, athermalization, and component articulation for improved imaging. The lenses and systems may be employed in display apparatuses, such as folded display apparatuses that have decreased footprint size, but long effective projection lengths.
    Type: Application
    Filed: April 24, 2001
    Publication date: September 6, 2001
    Inventors: Biljana Tadic-Galeb, Robert E. Fischer, David Kappel, Neil L. Condra, Ann M. Muscato, Sean M. Donnelly
  • Patent number: RE38403
    Abstract: In the projection optical system that projects an image of the first object onto the second object with a fixed reduction ratio and a projection aligner equipped therewith, said projection optical system comprises, viewed from said first object side, in order of succession, the first group of lenses with positive refractive power, and the second group of lenses virtually consists of afocal system, and the third group of lens with positive refractive power, and if the focal length of the overall system is represented by F, the projection magnification ratio of said projection optical system is represented by B, the distance between said first object and said second object is represented by L, and when a ray from the second object side of said projection optical system that is parallel to the optical axis of said projection optical system is incident on said projection optical system, a distance between a point where an extension on the first object side of said ray intercepts the optical axis and said first ob
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: January 27, 2004
    Assignee: Nikon Corporation
    Inventors: Toshihiro Sasaya, Kazuo Ushida, Yutaka Suenaga, Romeo I. Mercado