Abstract: An imaging assembly for an image sensor may include a lens, a transparent substrate and two aspherical optical coatings on each side of the substrate. The imaging assembly can also incorporate an opaque coating with an opening in-line with the lens to form an aperture, an anti-reflection coating, and an infrared filter coating.

Abstract: An imaging optical system O supported by a lens barrel 3 includes a second lens group G2. The second lens group G2 includes a fourth lens 54 and a black light shielding portion 54d formed by printing. The light shielding portion 54d is a film-shaped portion formed on the surface of the fourth lens 54, and blocks harmful light in the imaging optical system O. The light shielding portion 54d includes a synthetic resin. The light shielding portion 54d is disposed in a non-effective optical area of the fourth lens 54. The effective light path of the imaging optical system O is determined by the light shielding portion 54d.

Abstract: A lens array includes a lens assembly member and a light blocking member. The lens assembly member includes lens elements arranged in an arrangement direction substantially perpendicular to optical axes thereof. The light blocking member includes apertures extending and passing thought the optical axes. The lens assembly members and the light blocking member are arranged so that the following relationship is satisfied: RAY/RLY<RAX/RLX where RLY is a radius of the lens elements in a direction parallel to the arrangement direction, RLX is a radius of the lens elements in a direction perpendicular to the arrangement direction, RAX is a radius of the aperture in a direction perpendicular to the arrangement direction, and RAY is a distance from a center of a circle with the radius RAX to an end portion of the aperture in a direction in parallel to the arrangement direction.

Abstract: An optics block includes a substrate having first and second opposing surfaces, the substrate being a first material, a plurality of through holes extending in the substrate between the first and second opposing surface, a second material, different than the first material, filling a portion of the through holes and extending on a portion of the first surface of the substrate outside the through holes, and a first lens structure in the second material and corresponding to each of the through holes.

Abstract: An external mask-based radiance camera may be based on an external, non-refractive mask located in front of the main camera lens. The mask modulates, but does not refract, light. The camera multiplexes radiance in the frequency domain by optically mixing different spatial and angular frequency components of light. The mask may, for example, be a mesh of opaque linear elements, which collectively form a grid, an opaque medium with transparent openings, such as circles, or a pinhole mask. Other types of masks may be used. Light may be modulated by the mask and received at the main lens of a camera. The main lens may be focused on a plane between the mask and the main lens. The received light is refracted by the main lens onto a photosensor of the camera. The photosensor may capture the received light to generate a radiance image of the scene.

Abstract: One end of an FPC (21) for supplying power to the driving section of a light amount control section provided in a shutter unit (20) is disposed between a second lens holder (17) and the shutter unit (20) secured to this second lens holder (17) and is held between the second lens holder (17) and the shutter unit (20). Thus, the FPC (21) is prevented from being spaced apart from the shutter unit (20), and a member for securing the FPC (21) to the shutter unit (20) is eliminated, reducing the number of part items. Further, the second lens holder (17) and the shutter unit (20) blocks unwanted light toward the FPC (21), so that a ghost image is prevented from appearing on an image due to unwanted light reflected on the FPC (21).

Abstract: This invention provides an optical photographing system comprising four lens elements with refractive power, in order from an object side to an image side: a first lens element; a second lens element with positive refractive power, and at least one of the object-side and image-side surfaces thereof being aspheric; a third lens element with negative refractive power having a concave object-side surface and a convex image-side surface, and both of the object-side and image-side surfaces thereof being aspheric; a fourth lens element with positive refractive power, and both of the object-side and image-side surfaces thereof being aspheric; wherein the optical photographing system further comprises an aperture stop positioned between an object and the second lens element. By such arrangement, total track length of the optical photographing system can be effectively reduced. Wide view-angle and high image resolution are also obtained.

Abstract: An imaging optics capable of compensating for chromatic aberration is provided with a light shielding means in a surface peripheral area of a certain lens element in a lens system so as to block a light flux of a specified wavelength range, thereby eliminating chromatic aberration in halo of the light flux of the specified wavelength range when it passes the periphery of the lens system. Thus, the invention provides the imaging optics that, without an increase in the number of pieces of lens elements and without a use of an expensive specified low-dispersion glass material, in contrast with the prior art imaging optics of the same optical performances, well compensates for chromatic aberration, especially, in halo.

Abstract: An optical plate for an imaging camera is proposed that is used for further deepening the depth of field. The optical plate is orthogonal to the optical axis, that, in shape, (1) is an optical plate that has the same effective aperture diameter as the imaging camera and is attached in front thereof to deepen the depth of field, and on the incidence plane or exit plane, is equipped with first and second regions in the effective aperture, the first region being on the inside (or is an outside region), with a surface shape curvature that increases going from optical axis to periphery, and a thickness that becomes thicker going from the center to the periphery, that delays the phase of transmitted light more at the periphery than the center, the second region being on the outside (or is an inside region) which has a plane parallel plate shape.

Abstract: There is provided a projection lens unit for a pico-projector which comprises a lens array, a color composition prism, a cover glass and an image panel, the projection lens unit characterized in that: the lens array includes 1st to 6th lenses sequentially arrayed from a screen on which an image is projected, the 1st lens includes a stop side formed on a 1st side of the 1st lens, the stop side stops the passage of light, to perform the function of a diaphragm aperture, light passing from the 1st lens to the 6th lens travels in only one direction of the lens sides based on the diaphragm aperture, and parts of the lens sides through which the light does not pass are cut so that the whole height of the lens array is reduced.

Abstract: The present invention provides a photographing optical lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the object-side and image-side surfaces thereof being aspheric; and a third lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on the image-side surface, wherein the lens assembly is further provided with a stop disposed between an object and the first lens element.

Abstract: An optical processor is presented for applying optical processing to a light field passing through a predetermined imaging lens unit. The optical processor comprises a pattern in the form of spaced apart regions of different optical properties. The pattern is configured to define a phase coder, and a dispersion profile coder. The phase coder affects profiles of Through Focus Modulation Transfer Function (TFMTF) for different wavelength components of the light field in accordance with a predetermined profile of an extended depth of focusing to be obtained by the imaging lens unit. The dispersion profile coder is configured in accordance with the imaging lens unit and the predetermined profile of the extended depth of focusing to provide a predetermined overlapping between said TFMTF profiles within said predetermined profile of the extended depth of focusing.

Abstract: A projection display apparatus 101 in which the light quantity adjusting means has a simple and readily interchangeable structure, and which can improve image quality by adjusting the quantity of light received by a light valve continuously, without causing illuminance irregularities, and without having unwanted light radiated onto the screen, the light quantity adjusting means 9 having light blocking members 91L, 91R for blocking light in transit to a second lens array 22, and rotational axes 91LA, 91RA for turnably supporting each of the light blocking members on an xy plane, the light blocking members 91L, 91R and rotational axes 91LA, 91RA being positioned so that the rotational axes 91LA, 91RA are disposed in positions symmetric with respect to the optical axis AX on the xy plane, and the turning range from the light blocking initiation position at which the light blocking members 91L, 91R, by being turned, start to block light in transit toward the second lens array 22 to the maximum light blocking posi

Abstract: Disclosed herein is a zoom lens, wherein a stop moves in an optical axis direction n in a phase of zooming; a position of the stop in a telephoto end is located on an object side with respect to a position of the stop in a wide-angle end; an opening size of the stop is controlled in conjunction with the zooming so that an open F number becomes approximately constant in a range from the wide-angle end to a specific intermediate focal length; the opening size of the stop is made approximately constant in a range from the specific intermediate focal length to the telephoto end so that the open F number is changed; and the specific intermediate focal length fulfills the following conditional expression (1), wide-angle end focal length×1.5<specific intermediate focal length<telephoto end focal length/1.4 . . . (1).

Abstract: An incident-light controlling apparatus has a first aperture in a substrate, a diaphragm blade which rotates around an axis, and controls light passing through the first aperture, by the diaphragm blade rotating alternately between a first stationary position coinciding with the first aperture, and a second stationary position retracted from the first aperture, a permanent magnet joined directly to the diaphragm blade, at a position of the axis of rotation of the diaphragm blade, and magnetized in a direction of a plane of rotation of the diaphragm blade, and a pair of coils having a winding around cores disposed such that an end portion of each coil faces the magnet. The diaphragm blade rotated alternately between the first and second stationary positions due to an interaction between a generated magnetic field upon passing an electric power, and a magnetic field generated due to the magnet.

Abstract: Provided is a device for improving the focus of an object viewed using a night vision instrument.

Abstract: A lens barrel forming a substantially annular positioning portion on the inner surface thereof is provided. As such, a lens received in the lens barrel can be positioned by the positioning portion to a predetermined longitudinal position of the lens barrel and to be coaxial with the lens to form a lens module and to archive an excellent coaxiality between the lens barrel and the lens.

Abstract: A lens module of an imaging device includes a lens-barrel plate, a shutter plate and at least one elastic device. The lens-barrel plate includes at least one guide post, which is vertically arranged on the surface of the lens-barrel plate. The shutter plate includes at least one groove, which facilitates movement of the guide post in the groove. Each elastic device corresponds to an associated guide post and groove. Accordingly, the elastic device is compressed when external force is exerted on the lens-barrel plate and the shutter plate, and the elastic device recovers to separate the shutter plate from the lens-barrel plate when the external force is removed.

Abstract: A lens array includes a plurality of lens units each of which includes a plurality of microlenses linearly arranged, and a light shielding member having a plurality of openings as apertures. The openings are disposed so as to face the microlenses of respective lens units. Facing microlenses of the lens units have optical axes substantially aligned with each other and passing the openings of the light shielding member. Light absorbing portions are provided in the openings.

Abstract: Optical system for processing a light beam comprises first and second optical means that are convergent and divergent respectively and form an afocal optical device. The first optical means comprises a single convergent lens. According to the invention, this convergent lens provides an order 0 beam and an order 2 beam resulting from the light beam to be processed passing through this lens after having been subjected to a 0 reflection and 2 reflections respectively on the lens faces, and the lens is optimised for the order 2 beam and has an aperture f/# less than 4 for this order 2 beam, with a wave front quality less than ? peak-to-valley, where ? is the wavelength of the light beam to be processed.

Abstract: Among three lenses housed in a lens barrel, a first lens and a second lens are adjacent to each other. A position regulating section is a part where a first protrusion of the first lens is formed. A shielding member is provided at a position interposed between the first lens and the second lens and limits a passing luminous flux. An engagement section is a part of the shielding member, and in this part, there is formed an opening into which the first protrusion of the first lens enters. The engagement section engages with the position regulating section, and thereby the position of the shielding member in a direction crossing an optical axis is regulated.

Abstract: A sub-millimeter solid immersion lens (SIL), comprises a body of a high-index material transparent to electromagnetic radiation in a frequency band to be observed, the body having a flat bottom surface which receives an object to be observed, and the body further having a first upper surface whose limits approximate a zone of a spherical segment and a second upper surface defined by an upper bound of the zone of the spherical segment which prevents passage of electromagnetic radiation in the frequency band to be observed. The SIL may be incorporated into an array, according to other aspects.

Abstract: An annular aperture stop includes a first annular portion and a second annular portion. The first annular portion extends and slowly tapers towards the center of the aperture stop. The second annular portion extends inwards from the first portion and sharply tapers off to the innermost boundary of the aperture stop and defines a tapering angle. The radial thickness of the second portion is smaller than a predetermined tolerance of about 0.035 mm of the inner diameter of the aperture stop. The tapering angle is smaller than a predetermined threshold of about 70 degrees, whereby the innermost boundary of the aperture stop is protected from flashes during molding the aperture stop.

Abstract: A support structure for a light quantity control unit of a lens barrel includes a holding frame which holds a light quantity control member; front and rear support members positioned in front and behind the holding frame, respectively; a front guide pin and a front pin support hole formed on one and the other of the holding frame and the front support member, the front guide pin being slidably inserted into the front pin support hole; and a rear guide pin and a rear pin support hole formed on one and the other of the holding frame and the rear support member, the rear guide pin being slidably inserted into the rear pin support hole. The holding frame is supported by the front and rear guide pins and the front and rear pin support holes to be movable between the front and rear support members.

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: A device to create high definition photos includes: a lens for receiving light and transmitting an image; and a plurality of parallel blocking rods to delay the light within the lens; wherein the lens receives the light, the rods delay the light, and the lens transmits the delayed light, thereby providing an enhanced image of the item.

Abstract: An optical arrangement is provided for use in imaging with a large depth of focus. The optical arrangement comprises an aperture unit, and a replication unit. The replication unit is configured for producing a plurality of replicas of an input optical field passed through the aperture unit such that the replicas include at least two replicas that are of substantially the same phase distribution and are created at different regions of the aperture unit plane.

Abstract: A five-lens image lens system is revealed. The five-lens image lens system includes a first lens group with a negative power and a second lens group with a positive power. Along an optical axis in order from an object plane to an image plane, the first lens group includes a negative first lens and a negative second lens while at least one of optical surfaces of the first lens and the second lens is an aspherical optical surface. The second lens group includes a positive third lens, a positive fourth lens, and a negative fifth lens from the object plane to the image plane while an image-side lens surface of the positive fourth lens is glued with an object-side lens surface of the negative fifth lens.

Abstract: An adjustable apodized lens aperture is described which is constructed using photochromic material. As the excitation energy increases, the aperture constricts so as reduce the amount of light through the aperture. As the excitation energy decreases, the aperture dilates so as increase the amount of light through the aperture.

Abstract: Optical assemblies for use in medical or other devices so as to image an object under examination onto an image sensor include a plurality of lens elements that can be retained in lens barrel. The lens elements and the lens barrel can be sealed with a compressible gasket. In one example, at least one lens element is made of an injection-moldable plastic and at least one lens element is made of a relatively dispersive optical glass. A lens barrel diameter or lens diameter can be selected to permit access to the object under examination with surgical or other tools. Aperture plates can be situated so as to reduce flare in the object image.

Abstract: At least one exemplary embodiment is directed to a detection aperture that varies the effective aperture index of refraction or provides scattering structures to improve the detected resolution and/or intensity of a sampled image. In at least one exemplary embodiment a medium is inserted into the aperture, to match transmittance of polarization through the aperture, and to control the relative transmittance of polarizations through the aperture. In yet another exemplary embodiment structures are provided to scatter or redirect diffracted aperture light to improve detection resolution and/or intensity.

Abstract: A mini fixed focus lens module is provided. From an object end to an image end thereof, the mini fixed focus lens module sequentially includes a first lens, a second lens, a third lens and a fourth lens. The first lens has a positive diopter, the second lens has a negative diopter, the third lens has a positive diopter, the fourth lens has a negative diopter, a combined diopter of the second and third lenses is positive, and the mini fixed focus lens module satisfies the following formula: 0.2<f23/f<1 , wherein f23 is a combined focal length of the second and third lenses, and f is a system focal length of the mini fixed focus lens module. The invention arranges the first, second, third and fourth lenses to control a ratio of the combined focal length to the system focal length.

Abstract: The present disclosure relates to a wide angle lens system. The wide angle lens system includes, in order from the object side to the image side thereof, a first lens of positive refraction power, a second lens of positive refraction power, and a third lens of negative refraction power. The wide angle lens system satisfies the following condition: 0.45<f/TTL<0.75; and 1.4<f1/f<2.4. Wherein, TTL is a distance from a surface of the first lens facing the object side of the wide angle lens system to an image plane, f is a focal length of the wide angle lens system, and f1 is a focal length of the first lens.

Abstract: An imaging optical system includes an aperture stop, a first lens group disposed on an object side of the aperture stop, a second lens group disposed on an image side of the aperture stop and a plate-like ND filter disposed close to a position of the aperture stop in an optical axis direction of the first and second lens groups, and the second lens group includes positive refracting power as a whole, the ND filter is configured to be retractable from the optical axis, and to attenuate a passing light amount.

Abstract: An optical element module according to the present invention is provided, in which: one or a plurality of optical elements are housed within a light shielding holder; a slanting surface is provided on an outer circumference side of an optical surface of the optical element facing an aperture opening of the light shielding holder; a slanting surface is provided on an inner surface on a back side of the aperture opening of the light shielding holder in such a manner to face the slanting surface of the optical element; and the slanting surface of the optical element and the slanting surface of the light shielding holder are guided together, so that the aperture opening of the light shielding holder and the optical surface of the optical element are positioned.

Abstract: An optical module for an electro-optical device with a functional element, in particular for a camera device, and to an electro-optical device with such a module. The optical module includes a lens substrate portion with at least one lens element, and a spacer. The spacer serves to keep the lens substrate at a well defined axial distance from a base substrate portion of the fully assembled electro-optical device. In order to ensure improved performance of the functional element, an EMC shield is provided. The spacer is at least in parts electrically conductive and thus forms the EMC shield or a part thereof. A method of manufacturing a plurality of such modules on a wafer scale is also provided.

Abstract: An optical module for a camera device, the camera device including an image capturing element arranged on a base substrate portion, and has a top lens element and optionally further lens elements for imaging an object on the image capturing element, and further a baffle defining a predetermined field of view of the image capturing element. The baffle includes a generally transparent baffle substrate portion having a front surface and a rear surface, a generally non-transparent first layer with a plurality of first openings on the front surface and a generally non-transparent second layer with a plurality of second openings on the rear surface. The top lens element is arranged on the front and/or the rear surface of the baffle substrate, which leads to a reduced number layers/substrates in the module and to a reduced number of reflections on material-air interfaces, for example.

Abstract: An aperture stop includes a body and a black film. The body is stainless steel and the black film is disposed on at least two corresponding ends of the body. A manufacturing method of the aperture stop is also provided. The aperture stop is produced using the characteristics of the stainless steel body.

Abstract: A first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) are arranged in this order from an object side. The first lens (L1) has a biconvex shape and a positive refracting power. The second lens (L2) has a meniscus shape that is convex toward the object side, and has a negative refracting power. The third lens (L3) has a meniscus shape that is convex toward an image side, and has a positive refracting power. The fourth lens (L4) has a meniscus shape that is convex toward the object side, and has a negative refracting power. A chromatic aberration generated by the first lens (L1) is corrected by the second lens (L2). A chromatic aberration generated by the third lens (L3) is corrected by the fourth lens (L4).

Abstract: The lens barrel of the present invention includes: a lens; and a light blocking member provided in the vicinity of the lens for blocking part of light traveling toward the lens, a main constituent of the light blocking member being a polymer alloy resin.

Abstract: In a method for fabricating an integrated optical device by creating a wafer stack by stacking at least a top wafer carrying as functional elements a plurality of lenses on at least one further wafer including further functional elements, and separating the wafer stack into a plurality of integrated optical devices, wherein corresponding functional elements of the top and further wafer are aligned with each other and define a plurality of main optical axes, a method for providing a sunshade plate as part of an integrated optical device (10), including the steps of: providing a sunshade plate having a plurality of through holes, the through holes being arranged to correspond to the arrangement of the functional elements on the top wafer; and stacking the sunshade plate on the top wafer, with the through holes being aligned with said main optical axes.

Abstract: The present invention provides wafer level optical elements that obviate a substrate wafer or a portion thereof disposed between optical structures or optical surfaces of the element.

Abstract: An objective lens for an endoscope, including a negative front lens group and a positive rear lens group arranged such that an aperture stop is positioned therebetween, wherein the front lens group has at least a front-side negative lens and a front-side positive lens arranged in this order from an object side, and the rear lens group has at least a rear-side positive lens and a cemented lens arranged in this order from the object side, the cemented lens being configured by cementing together negative and positive lenses. The objective lens satisfies following conditions: ?4.5?fF/f??2.0 and 1.5?fRP/f?2.5, where fF (unit: mm) represent of the front lens group, f (unit: mm) represents a total focal length of the front lens group and the rear lens group, and fRP (unit: mm) represents a focal length of the rear-side positive lens.

Abstract: An imaging lens (LN) includes at least one lens block (BK), and an aperture stop (ape). The lens block (BK) includes a plane-parallel lens substrate (LS) and a lens (L) formed of different materials. In the imaging lens (LN), a first lens block (BK1) disposed at the most object-side exerts a positive optical power, and said at least one lens block is contiguous only with one of the object-side and image-side substrate surfaces of the lens substrate (LS).

Abstract: A lithography method is provided. The method includes generating a beam of radiation, patterning portions of the beam of radiation, projecting the patterned beam of radiation towards a substrate, and blocking scattered light from the beam of radiation from the substrate.

Abstract: An imaging arrangement and method for extended the depth of focus are provided. The imaging arrangement comprises an imaging lens having a certain affective aperture, and an optical element associated with said imaging lens. The optical element is configured as a phase-affecting, non-diffractive optical element defining a spatially low frequency phase transition. The optical element and the imaging lens define a predetermined pattern formed by spaced-apart substantially optically transparent features of different optical properties. Position of at least one phase transition region of the optical element within the imaging lens plane is determined by at least a dimension of said affective aperture.

Abstract: An optical lens system for taking image comprises, in order from the object side to the image side: an aperture stop; a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a plastic second lens element with negative refractive power having a concave object-side surface, a convex image-side surface and at least one aspheric surface; a plastic third lens element with negative refractive power having a convex object-side surface, a concave image-side surface and at least one aspheric surface. The number of the lens elements with refractive power being limited to three. Focal lengths of the optical lens system, the first lens element, the second lens element and the third lens element are f, f1, f2, f3 respectively; Abbe numbers of the first and second lens elements are V1, V2 respectively, an on-axis distance between second and third lens elements is T23, and they satisfy the relations: 0.8<f/f1<1.8; 0<|f/f2|<0.8; 0<|f/f3|<0.

Abstract: An optical relay (500) includes a glare trap (512) that in one embodiment has one or more surfaces configured to reflect light impinging the surface (550) at an angle less than a first angle (722) relative to a normal line (710), and to transmit light impinging the surface (550) at an angle greater than a second angle (723) relative to the normal line (710). In other embodiments, the glare trap (512) reflects light impinging at an angle greater than a first angle and transmit light impinging at an angle that is less than a second angle. The separation between the first angle (722) and second angle (723) can be on the order of 20 degrees or more, but this angle can be reduced or eliminated when polarized light is used within the optical relay (500).

Abstract: A lens barrel has a first lens group, a second lens group, a third lens group, a first support frame for supporting the first lens group, a second support frame for supporting the second lens group, a first driving unit, a shutter unit, and an aperture unit. The first lens group has an overall negative refractive power, and includes a prism. The second support frame is driven along a second optical axis by the first driving unit. The shutter unit has a shutter mechanism, a shutter drive motor configured to drive the shutter mechanism, a neutral density filter, and a filter drive motor configured to drive the neutral density filter. The shutter drive motor and the filter drive motor are disposed flanking the second optical axis when viewed in a direction along the second optical axis.

Abstract: Provided are a wafer-level lens module and an image pickup module including the same. The wafer lens module includes a plurality wafer-scale lenses. At least one of the plurality of wafer-scale lenses, such as a wafer-scale lens positioned toward an object side, includes a substrate and a glass lens element formed on one side of the substrate. The glass lens element may be a one-sided lens or a double-sided lens. When the glass lens is a double-sided lens, the substrate may have a through hole. The remaining wafer-scale lenses each include a substrate and polymer lens elements made of UV curable polymer and formed on both sides of the substrate. Also, spacers are interposed between the wafer-scale lenses, along the edge portions of the substrates, so as to maintain predetermined intervals between the wafer-scale lenses.