Abstract: The present description relates to a device that includes: a microscope lens with an optical axis; a mounting that includes a distal portion, in which the microscope lens is arranged; a first end piece fixed in a removable manner, in a first operating mode for in vivo microscopic analysis of the skin, to the distal portion of the mounting; a second end piece fixed in a removable manner, in a second operating mode for ex vivo microscopic analysis of a sample, to the distal portion of the mounting; a sample carrier with a receiving surface; a support that cooperates with the second end piece in the second operating mode so as to receive the mounting so that the optical axis of the microscope lens is substantially aligned in a predetermined direction with respect to the receiving surface.

Abstract: Provided is a liquid immersion objective including an objective lens having a prescribed optical power, and a plurality of planar plates having substantially no optical power and having different thicknesses, and configured to be placed between the objective lens and immersion liquid deposited on a sample to be observed, the planar plates being made of a substantially same material, wherein the planar plates being selected according to a property of the immersion liquid.

Abstract: An optical lens is provided. The optical lens includes, in order from an object side to an image-forming side, a first lens having refractive power, a second lens having refractive power, a third lens having positive refractive power, a fourth lens having positive refractive power and a fifth lens having refractive power. The object-side surface of the first lens is a concave surface or a flat surface. The overall optical effect of the first lens and the second lens is negative refractive power. The refractive rate on the object-side surface and/or the image-side surface of the fifth lens from the center point in a radial direction away from the optical axis changes in the same tendency.

Abstract: A tube system for a microscope includes two lenses and a glass element. The tube system can have a compact build and chromatic aberrations that lie within a specified range.

Abstract: An objective includes: a first lens group that includes a meniscus lens component that is the closest to an image among lens components of the first lens group, the meniscus lens component having a convex surface facing an object; and a second lens group that is closer to the image than the first lens group is, and the objective satisfies the following conditional expressions: 0?|?z1|/DOFe?1.5??(1) 0?|?z2|/DOFe?2??(2) where ?z1 indicates a difference between a h-line minimization position and an e-line minimization position; ?z2, a difference between a position on then optical axis at which an RMS wavefront aberration in light having a wavelength of 800 nm is minimized and the e-line minimization position; DOFe, a depth of focus for the e line.

Abstract: An objective optical system for an endoscope includes, in order from an object side, a first lens having a negative refractive power, a second meniscus lens having a positive refractive power and having a convex surface directed toward an image side, an aperture stop, a third lens having a positive refractive power, and a cemented lens of a fourth lens having a positive refractive power and a fifth lens having a negative refractive power.

Abstract: A dry objective including the first lens group having a positive refractive power that converts a divergent pencil of light from an object point into a convergent pencil of light and the second lens group having a negative refractive power. The objective includes a moving lens component that moves along an optical axis and satisfies the following conditional expressions of: 0.85?NAob<1.0??(1); and 9 mm?Yreso×|?|?20 mm??(3), where NAob is a numerical aperture, Yreso is a maximum object height in a region in which a value obtained by dividing RMS wavefront aberration at the e-line by a wavelength of the e-line is 0.2 or smaller, the region being on a plane that is orthogonal to the optical axis and intersects with an on-axis position at which the RMS wavefront aberration at the e-line is minimized, and ? is a magnification of the objective.

Abstract: An imaging lens includes a first lens group having positive refractive power and a second lens group having negative refractive power, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens. The second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens. The third lens has a concave surface facing the image plane side near an optical axis thereof. The sixth lens has a concave surface facing the object side near an optical axis thereof. The fifth lens has a specific Abbe's number.

Abstract: A variable magnification optical system includes: a first lens group having a positive refractive power and arranged closest to an object; a negative lens group having a negative refractive power and arranged closer to an image than the first lens group; a positive lens group which has a positive refractive power, which includes at least one lens that moves integrally with an aperture stop, and which is arranged closer to the image than the negative lens group; and a focusing group arranged between the negative lens group and the positive lens group, wherein when varying magnification, the first lens group moves with respect to an image plane, the distance between the first lens group and the negative lens group is changed, and the distance between the negative lens group and the positive lens group is changed, wherein when focusing, the distance between the focusing group and a lens arranged at a position to face an object-side of the focusing group is changed, and the distance between the focusing group and

Abstract: An objective element for use in an endoscope is provided. The objective element comprises a flat glass plate that is in contact with the plano side of a plano-convex lens. The side of the flat glass plate in contact with the plano-convex lens is coated with an opaque material other than an aperture that is in line with the axis of the plano-convex lens. Alternatively, the plano side of a plano-convex lens may be coated with an opaque material other than an aperture that is in line with the axis of the plano-convex lens.

Abstract: The imaging lens consists of, in order from an object side, a positive first lens L1, a negative second lens L2, a positive third lens L3, and a positive fourth lens L4. Conditional expressions relating to a focal length f of an entire system, a combined focal length f234 of the second lens L2 to the fourth lens L4, an Abbe number ?d1 of the first lens L1, an Abbe number ?d2 of the second lens L2, a radius of curvature R1 of a surface of the first lens L1 on the object side, and a radius of curvature R2 of a surface of the first lens L1 on an image side: 0.4<f/f234<2; ?d1<50; 5<?d1??d2<26; ?5<(R1+R2)/(R1?R2)<?0.9 are satisfied.

Abstract: An instrument and a method of scanning a large microscope specimen moves the specimen relative to a detector array during scanning by a scanner. Magnification of the instrument is adjustable using a zoom tube lens over a continuous range of magnification to enable scans of the specimen to be taken over a range of resolutions without varying the infinity corrective objective. Scans of the specimen can be taken over a range of resolutions with the same infinity connected objective.

Abstract: Provided here are microscope objectives that include a first plurality of lenses positioned within the passageway on a sample end of the microscope objective and a second plurality of lenses positioned within the passageway and spaced apart from the first plurality of lenses and opposite the sample end such that the first plurality of lenses and the second plurality of lenses are aligned along an imaging axis and such that each individual lens is rotationally symmetrical about the imaging axis. Also included is a motor configured to move a carrier along the imaging axis to change a distance between each lens of first plurality of lenses relative to at least one lens of the second plurality of lenses.

Abstract: An endoscope having an insertion portion to be inserted into an object to be observed, includes: a substantially tubular holder member mounted to the insertion portion and having an open front end portion including a shoulder surface surrounded by an axial wall; a lens barrel holding an objective lens system and received in the holder member; and a light-transmissive closure member fitted into a front opening defined by the axial wall, and fixed to the front opening by a bonding agent interposed between an outer circumferential surface of the closure member and an opposing inner circumferential surface of the open front end portion of the holder member, wherein a space axially adjoining the shoulder surface is defined between an outer circumferential surface of a front end portion of the lens barrel and an opposing inner circumferential surface of the holder member.

Abstract: An optical lens, comprising a first to an eighth lens (L1, L2, L3, L4, L5, L6, L7, L8) coaxially arranged in sequence along the direction of transmission of an incident light ray.

Abstract: A LED optical communication receiving lens includes a first surface and a second surface opposite to the first surface. The first surface includes a first spherical surface and a second spherical surface connected to the first spherical surface. The second surface includes a third spherical surface and a planar surface connected to the third spherical surface. A position of the LED optical communication receiving lens is defined as a three-dimensional Cartesian coordinate system (x, y, z). Sphere centers and symmetric central points of the first spherical surface, the second spherical surface, and the third spherical surface are located on the x axis. The first spherical surface and the planar surface are transmitted surfaces. The second spherical surface and the third spherical surface are reflective surfaces. The present application also relates to a LED optical communication system including the LED optical communication receiving lens.

Abstract: An optical imaging system generates an image of an object plane and includes a lens system which, in turn, includes a main objective and a reduction optical unit between the main objective and the object plane. The reduction optical unit includes a first composite element with a positive refractive power and a second composite element with a negative refractive power. The first composite element includes a first and second lens. The second composite element includes a third and fourth lens. An object-side first main plane and an image-side second main plane are defined by the lens system. The optical imaging system defines an observation beam path which is guided through the lens system so that, in each of the first main plane and the second main plane, the observation beam path is at a distance from the optical axis of the lens system.

Abstract: An optical imaging system generates an image of an object plane and includes a lens system which, in turn, includes a main objective and a reduction optical unit ahead of the main objective. The lens system is aligned along an optical axis and the reduction optical unit includes a first lens with a positive refractive power and a second lens with a negative refractive power. An object-side first main plane and an image-side second main plane are defined by the lens system. The optical imaging system defines an observation beam path which is guided through the lens system so that, in the first main plane and in the second main plane, the observation beam path is at a distance (B) from the optical axis. The first lens is of a first material having a first Abbe number and the second lens is of a second material having a second Abbe number, wherein the first Abbe number is greater than the second Abbe number.

Abstract: Provided is an endoscope objective optical system 1 including, in order from an object side, a first lens 2 composed of a negative single lens, a second lens 3 composed of a positive single lens, an aperture stop 4, a third lens 5 composed of a positive single lens, and a fourth lens 6 composed of a positive combined lens, wherein the third lens 5 has a meniscus shape having a convex surface facing the image side. The endoscope objective optical system (1) satisfies the following conditions: 0.3<Df/f<1.15,??(1) n1<1.79,??(2) n2>n1,??(3) 0.6<IH/f<0.83,??(4) and |r1|?|r2|+d1>1.

Abstract: Provided is an endoscope objective optical system that is constituted of, in order from the object side, a positive first group, an aperture stop, and a positive second group, wherein the first group is constituted of a negative first lens whose surface on the object side is flat and a positive second lens; the second group is constituted of a combined lens formed of a positive third lens and a negative fourth lens; and Conditional Expressions (1) to (3) are satisfied. F31, F32, and f are the focal lengths of the third lens, the fourth lens, and the entire system, respectively; and R3 and R4 are the radii of curvature at the object-side surface and the image-side surface of the second lens, respectively. 1.2<f31/f<1.55 . . . (1), ?2.8<f32/f<?1.98 . . . (2), and 0.38<|R4+R3|/|R4?R3|<0.77 . . . (3).

Abstract: Provided is an objective optical system comprising, in order from an object side: an aperture stop; a positive first group; a second group; a positive third group; and a fourth group, wherein the first group is formed of a single meniscus lens or plano-convex lens, whose convex surface faces an image side, the second group is formed of a single lens, the third group is formed of a cemented lens consisting of a positive lens and a negative lens, the fourth group is formed of a single lens, and Conditional Expressions (7) and (8) below are satisfied, where f is a focal length of an entire system, f4 is a focal length of the fourth group, and f2 is a focal length of the second group. ?0.5<f/f4<?0.001??(7) 0.1?|f4/f2|?5.

Abstract: An endoscope optical system, including a front group and a rear group arranged in this order from an object side such that an aperture stop is arranged between the front and rear groups, wherein the front group includes a negative lens and a positive lens arranged in this order from the object side, the rear group includes a positive lens and a cemented lens arranged in this order from the object side, and when f (unit: mm) denotes a focal length of an entire endoscope optical system, EX (unit: mm) denotes a distance (which takes a minus sign on the object side with respect to an image plane) from the image plane to an exit pupil, and f2 (unit: mm) denotes a focal length of the rear group, the endoscope optical system satisfies conditions: ?10<EX/f<?6??(1), and 1.15<f2/f<1.35??(2).

Abstract: Described is a microscope objective (10, 100, 200) having an objective housing (12) which contains a lens system including a lens unit (60) capable of being moved along the optical axis (O) of the lens system to compensate for the thickness of the coverslip, and further having an adjusting device for adjusting the lens unit (60), said adjusting device including a drive unit (14, 102, 202) and a transmission (42, 44, 46, 48, 50, 52, 54, 56, 62) which is drivable by the drive unit (14, 102, 202) and coupled to the lens unit (60). According to the present invention, the drive unit (14, 102, 202) has a motor (34) and is mounted on the objective housing (12).

Abstract: A high-aperture immersion objective, in particular for confocal applications in fluorescence microscopy and for TIRF applications, having three subsystems of lenses and/or lens groups. The design of the subsystems has made it possible for a relatively large object field of 0.25 mm to be present in the case of a high-resolution numerical aperture of 1.49. Furthermore, improved transparency is possible up to a wavelength of 340 nm.

Abstract: A microscope objective lens includes, in an order starting from an object side, a first lens group having a positive power, a second lens group having a positive power, a third lens group having a negative power, and a fourth lens group having a positive power. The second lens group is configured to move in an optical axis direction between the first lens group and the third lens group so as to correct a variation in an aberration caused by a thickness of a cover glass. The following conditions are satisfied: 0.65<NA<1; and 1<f1/F<2, where NA is a numerical aperture of the microscope objective lens, F is a focal length of the microscope objective lens, and f1 is a focal length of the first lens group.

Abstract: A microscope objective lens includes, in an order starting from an object side, a first lens group having a positive power, a second lens group having a positive power, a third lens group having a negative power, and a fourth lens group having a positive power. The second lens group is configured to move in an optical axis direction between the first lens group and the third lens group so as to correct a variation in an aberration caused by a thickness of a cover glass. The following conditions are satisfied: 0.65<NA<1; and 1<f1/F<2, where NA is a numerical aperture of the microscope objective lens, F is a focal length of the microscope objective lens, and f1is a focal length of the first lens group.

Abstract: An objective lens includes, in order from an object side, a front group having negative refractive power, an aperture stop, and a rear group having positive refractive power, wherein the front group includes, in order from the object side, a first lens which is a negative meniscus lens with a convex surface turned to the object side and a second lens which is a negative lens with a concave surface turned to the object side; the rear group includes, in order from the object side, a positive third lens and a fourth lens made up of a positive lens and a negative lens cemented together, and the objective lens satisfies conditional expression (1) below: ?0.8<f—F/f—R<?0.3 ??(1), where f_F is a focal length of the front group, and f_R is a focal length of the rear group.

Abstract: There is provided an imaging optical system installed in a mobile communications terminal and a personal digital assistant (PDA) or utilized in a surveillance camera and a digital camera. The imaging optical system including, sequentially from an object side in front of an image plane: a first lens having positive refractive power and two convex surfaces; a second lens having negative refractive power and two concave surfaces; a third lens having positive refractive power and a meniscus shape; and a fourth lens having a concave object-side surface. The fourth lens has a shape satisfying following condition 1: 10<|R8/F|<50??condition 1, where R8 is a radius of curvature of the object-side surface of the fourth lens, and F is an overall focal length of the imaging optical system.

Abstract: In an objective lens for an endoscope, the full angle of view exceeds 120 degrees, and a most-object-side surface of the objective lens is spherical. Further, the following condition formulas (1) and (2) are satisfied: 0.7<?8/?10<0.8??(1); and 5<R1/f<15??(2), where ?10: half angle of view corresponding to a maximum image height; ?8: half angle of view corresponding to an image height that is 80% of the maximum image height; R1: curvature radius of the most-object-side surface; and f: focal length of the entire system of the objective lens.

Abstract: A MEMS-based display device is described, wherein an array of interferometric modulators are configured to reflect light through a transparent substrate. The transparent substrate is sealed to a backplate and the backplate may contain electronic circuitry fabricated on the backplane. The electronic circuitry is placed in electrical communication with the array of interferometric modulators and is configured to control the state of the array of interferometric modulators.

Abstract: A wide-angle optical lens assembly comprises, in order from an object side to an image side: a first lens element with a negative refractive power having concave image-side surface, a second lens element with a positive refractive power, a third lens element with a positive refractive power, and a fourth lens element with a positive refractive power having convex image-side surface, at least one surface of the fourth lens element thereof being aspheric. By such arrangement, total track length and photosensitivity of the wide-angle optical lens assembly can be effectively reduced while retaining large field of view and superb image quality.

Abstract: A four-piece imaging lens module includes a fixed aperture diaphragm, a first lens, a second lens, a third lens and a fourth lens arranged from an object side to an image side in a sequence of: the diaphragm; the first lens of a positive refractive power, having a convex surface on the object side and at least one aspheric surface; the second lens of a negative refractive power with a meniscus shape, having a convex surface on the image side and at least one aspheric surface; the third lens of a positive refractive power with a meniscus shape, having a concave surface on the object side and at least one aspheric surface; the fourth lens of a positive refractive power, having a concave surface on the image side and at least one aspheric surface. The invention is to provide a four-piece imaging lens module with higher definition and higher yield rate.

Abstract: A MEMS-based display device is described, wherein an array of interferometric modulators are configured to reflect light through a transparent substrate. The transparent substrate is sealed to a backplate and the backplate may contain electronic circuitry fabricated on the backplane. The electronic circuitry is placed in electrical communication with the array of interferometric modulators and is configured to control the state of the array of interferometric modulators.

Abstract: An immersion microscope objective lens of the present invention has: in order from an object, a first lens group G1 having positive refractive power and having a cemented lens of a plano convex lens having a plane facing the object and a meniscus lens having a concave surface facing the object, and a single meniscus lens having a convex surface facing the object; a second lens group having positive refractive power and having a plurality of cemented lenses; and a third lens group having negative refractive power and having a cemented meniscus lens having a concave surface facing an image, and a cemented meniscus lens having a concave surface facing the object. And the following conditional expressions 0.12<d0/f<0.25, 0.04<?Ct(p)??Ct(n)<0.09 and ?0.03<?hg(p)??hg(n)<0.00 are satisfied.

Abstract: A wide field video endoscope objective and method of assembly the objective including four groups with five lenses, a mechanical housing containing the entire image forming elements, a aperture stop, a centering member and a retainer sleeve. The centering member is at first centered over the photo sensitive area of the chip and bonded to the surface of the cover glass. The retainer sleeve slides over said centering member and is glued to the centering member and the housing of the video chip. The objective housing with the optical elements is screwed on the centering member to adjust for focusing.

Abstract: An endoscope objective lens for collecting combined bright field (white light) and fluorescence images includes a negative lens group, a stop, and a positive lens group. The lens has a combination of large entrance pupil diameter (?0.4 mm) for efficiently collecting weak fluorescence light, large ratio between the entrance pupil diameter and the maximum outside diameter (Dentrance/Dmax larger than 0.2), large field of view (FFOV?120°) and favorably corrected spherical, lateral chromatic and Petzval field curvature for both visible and near infrared wavelengths.

Abstract: An objective lens system includes a first lens group having a focal length F1 for focusing, a second lens group, which is a system of magnification variation having a focal length F2, a third lens group for compensation and having a focal length F3 and a fourth lens group having a focal length F4. The first lens group has a positive first lens assembly with a focal length F1a and a negative second lens assembly with a focal length F1b. The third lens group ensures an image point of the second lens group falls within the focal length F3 thereof. The first, second, third and fourth lens groups commonly form a finite conjugative system of magnification variation. Moreover, the objective lens system, as a whole, has a negative focal length.

Abstract: A microscope objective having at least four lenses or groups of lenses and which can be used to improve image contrast. According to the invention, a phase plate, aligned concentrically to the optical axis, can be integrated into and taken out of the air space between the first lens and the second lens, as viewed from the object side. The defined arrangement of the phase plate and the associated shift of the real pupil into the air space between the first two lenses or groups of lenses, respectively, of the microscope objective allows a microscope objective, initially designed as a bright-field variant, to be redesigned as a phase contrast variant with relative ease.

Abstract: A microscope has an oil immersion system objective and an imaging lens to make observations by charging oil between a cover glass protecting a sample and the most sample-side lens surface. At least one of a plurality of lens units, placed on the image side of the most sample-side lens in the oil immersion system objective, is moved along the optical axis, and thereby a front focal distance and a front focal position can be adjusted so that a predetermined depth position of the sample is focused in a state where a working distance WD between the cover glass and the most sample-side lens surface in the oil immersion system objective is set to a condition, 0<WD?0.03 mm.

Abstract: A microscope optical system includes, in order from an object side to an image side, a first lens group, a second lens group, a stop, a third lens group, a fourth lens group and a sensor. The first to fourth lens groups all have at least one lens element and at least one of lens elements of the first to fourth lens groups has an aspheric surface. The microscope optical system satisfies several specific conditions so as to provide microscope images of high resolution and high zoom ratio. A digital microscope having the microscope optical system adopts a CCD sensor so that a observer may observe microscope images displayed on a large display screen and store the images for subsequent edition or inspection.

Abstract: A projection optical system comprises a plurality of lenses disposed along an optical axis of the projection optical system; wherein the plurality of lenses is dividable into four non-overlapping groups of lenses of positive and negative refractive powers, wherein the following relation is fulfilled: 2 · y · NA · 1 k · ? i = 1 k ? ? ? i ? ? V 1 wherein: y is half a diameter in mm of a maximum image field imaged by the projection optical system, NA is a maximum numerical aperture on a side of the second object, ?i is a refractive power in mm?1 of the ith lens, k is a total number of lenses of the projection optical system, and wherein V1 is greater than 0.045.

Abstract: An objective lens comprises a housing, an iris diaphragm and a plurality of lens groups. For focusing the objective lens while minimizing the variation of the image angle at least two lens groups are adapted to be moved relative to the housing. The one lens group is arranged in front of the iris diaphragm. The other lens group is arranged at least partially behind the iris diaphragm.

Abstract: The invention relates to a microscope objective which consists of at least four lenses or groups of lenses and can preferably be used to improve image contrast. According to the invention, a phase plate, aligned concentrically to the optical axis, can be integrated into and taken out of the air space between the first lens and the second lens, as viewed from the object side. The defined arrangement of the phase plate and the associated shift of the real pupil into the air space between the first two lenses or groups of lenses, respectively, of the microscope objective allows a microscope objective, initially designed as a bright-field variant, to be redesigned as a phase contrast variant with relative ease.

Abstract: An objective lens system for microscope which comprises first and second lens units or first through fourth lens units, and in which the second or third lens unit has a function to correct chromatic aberration within a range from a visible region to a near infrared region and aberrations are favorably corrected within the range from the visible region to the near infrared region.

Abstract: An objective lens includes, in order from the object side, a first lens (L1) with negative power, a second lens (L2) with positive power, an aperture stop (AS), and a third lens (L3) with positive power. A lens component located on the image side of the aperture stop (AS) is constructed with a positive single lens or a plurality of positive single lenses, and the objective lens satisfies the following conditions: 45<vd1?vd2 ?0.6<f1/f2<?0.3 where vd1 is the Abbe's number of the first lens, vd2 is the Abbe's number of the second lens, f1 is the focal length of the first lens, and f2 is the focal length of the second lens.

Abstract: A miniature microscope objective for a miniature microscope array (MMA) includes preferably at least three or four lenses including from object to image a first positive lens, a second positive lens and a third negative lens. The objective has a numerical aperture (NA) that provides diffraction limited performance, and is preferably between 0.4 and 0.9 for the four lens design. The magnification of the objective is below approximately the outer diameter (OD) divided by the field of view (FOV), and is preferably between approximately 1 and 12, and is further preferably greater than 4. The ratio of magnification (M) to numerical aperture (NA) for the objective thereby has a magnitude that is less than substantially 30.

Abstract: A four-group endoscope objective lens includes, in order from the object side, a first lens group of negative refractive power, a second lens group of positive refractive power, a diaphragm, and third and fourth lens groups of positive refractive power. The second and fourth lens groups each include a lens component that includes two lens elements. Some lens elements of the first, third, and fourth lens groups have particular shapes or refractive powers. The endoscope objective lens may include only six lens elements and satisfy certain specified conditions.

Abstract: An objective lens for endoscopes comprises a front lens unit component and a rear lens unit component, between which a stop is located, wherein a front lens unit component comprises, in order from the object side, a first lens having a negative refractive power and a second lens having a positive refractive power which directs a surface of the small radius of curvature toward the object side; wherein a rear lens unit component comprises a third lens having a positive refractive power which directs a surface of the small radius of curvature toward the image side, a fourth lens having a positive refractive power and a fifth lens having a negative refractive power; and wherein the fourth lens and the fifth lens are cemented, and satisfying the following condition: 2.0<|f3/f|<3.0 where f is the composite focal length of the total system and f3 is the focal length of the third lens.

Abstract: A miniature microscope objective includes at least three or four miniature lenses including from object to image at least a first positive lens, a second positive lens, and a third lens. The numerical aperture (NA) is greater than 0.4 and no more than approximately 0.9. The magnification variation ?M/M over red, green and blue wavelengths spanning 165 nm or more is less than 0.3% to 1.5%, an image size variation is less than a sampling distance, at least one lens has an aspheric departure, and the miniature objective includes at least one diffractive surface.

Abstract: This invention relates to a microscope having an infinity-corrected objective and providing a flat field of view.