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 having positive refractive power, a second lens having negative refractive power, and a third lens. The second lens group includes a front side lens group having negative refractive power and a rear side lens group having positive refractive power. The front side lens group includes a fourth lens and a fifth lens. The rear side lens group includes a sixth lens and a seventh lens. The first lens group is arranged to be away from the second lens group by a specific distance on an optical axis thereof. The first to third lenses have specific Abbe's numbers.

Abstract: A compact imaging lens which meets the demands for low-profileness and a wide field of view and corrects various aberrations properly. The imaging lens includes, in order from an object side to an image side: an aperture stop; a first lens with positive refractive power having a convex surface on the object side; a second lens with negative refractive power as a meniscus lens having a concave surface on the image side; a third lens having a concave surface on the image side; a fourth lens; a fifth lens with positive refractive power having a convex surface on the image side; and a sixth lens with negative refractive power having a concave surface on each of the object side and the image side.

Abstract: Optical systems based on an objective lens comprising one or more plastic lens elements are disclosed. The inclusion of plastic lens element reduces one or more of system cost, size, weight, and/or complexity. The chromatic performance of some imaging systems in accordance with the present invention is improved by incorporation of a diffractive surface into the entry surface of the objective lens.

Abstract: Dual-pupil, dual spectral band wide field-of-view re-imaged refractive optical imaging systems. In one example an optical imaging system includes a dual-band front objective lens group configured to receive electromagnetic radiation over the field-of-view of the optical imaging system, to form a first pupil, and to direct the electromagnetic radiation through the first pupil, the electromagnetic radiation including first and second non-overlapping spectral bands, and the field-of-view spanning at least 45°×45°, and a re-imaging refractive optical sub-system configured to receive the electromagnetic radiation via the first pupil, to form at least one intermediate image plane, and to focus the electromagnetic radiation via at least one second pupil onto at least one final image plane to form a first image from the first spectral band and a second image from the second spectral band. A beam deflector can be positioned proximate the first pupil to expand the field of view.

Abstract: The present invention relates generally to a head-mounted projection display, and more particularly, but not exclusively to a polarized head-mounted projection display including a light engine and a compact, high-performance projection lens for use with reflective microdisplays.

Abstract: A single focal length lens system includes, in order from an object side to an image side, a first lens unit having positive optical power and a second lens unit including a lens element that moves in a direction of an optical axis with respect to an image surface in focusing from an infinity in-focus condition to a close-object in-focus condition. The first lens unit includes an aperture diaphragm and a lens element A located on the object side of the aperture diaphragm. A lens element B having positive optical power and a lens element C having negative optical power are located on the image side of the aperture diaphragm. Abbe numbers of the lens elements A, B, and C to the d-line and partial dispersion ratios of the lens elements A, B, and C for the g-line and the F-line satisfy a predetermined relation.

Abstract: A finder is a reverse Galileo type finder comprising, in order from the object side to the eye point side: an objective lens group having a negative refractive power; and an eyepiece lens group having a positive refractive power. The distance between the objective lens group and the eyepiece lens group is the longest distance from among distances between lenses, as an air converted length, in an observation optical system from the objective lens group to the eyepiece lens group. The eyepiece lens group consists of, in order from the object side to the eye point side: a first lens having a negative refractive power; a second lens having a positive refractive power; and a third lens having a negative refractive power. The first lens and the third lens are fixed while the second lens moves in the direction of the optical axis during diopter adjustment.

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear lens group including one or more lens units. For zooming, the first to third lens units move, thereby changing intervals between adjacent ones of these lens units. For the zoom lens, a focal length (f1) of the first lens unit, focal lengths (fw, ft) of the zoom lens at a wide angle end and at a telephoto end, respectively, and amounts (M2, M3) by which the second and third lens units, respectively, move when zooming from the wide angle end to the telephoto end are appropriately defined.

Abstract: The following invention relates to an optical device for use in a system that requires optical zoom or focus abilities, particularly for providing pre-set zoom parameters with a very low energy requirement. There is provided an optical magnification device comprising at least one pair of optically aligned deformable reflectors, wherein each reflector pair has at least two configurations, wherein selection of a first and a second configuration of said deformable reflector pairs provides pre-defined magnification states, such that in any configuration one reflector is substantially concave and the other is substantially convex; at least one controller may cause both the reflectors to move between said at least two configurations.

Abstract: A projection device to magnify and project, on a screen, an image displayed at an image display element, includes: a dioptric system including at least one positive lens and at least one negative lens; and a reflection optical system having at least one reflection optical element.

Abstract: An extreme ultraviolet (EUV) light generator includes a collecting mirror having a first focal point and a second focal point, the first focal point being closer to the collecting mirror than the second focal point, a laser to generate a laser beam and to radiate the laser beam toward the first focal point of the collecting mirror, and a droplet generator to generate a droplet and to discharge the droplet at the first focal point of the collecting mirror, wherein the collecting mirror includes a concave reflective surface, a through hole in a center of the reflective surface, and a drip hole between the through hole and an outer circumferential surface of the reflective surface.

Abstract: A modular illumination system is capable of producing a light beam having a wide field of view—e.g., in excess of ninety degrees—while maintaining a high collection efficiency as well as a high degree of beam homogeneity. The illumination system comprises an elementary unit having a linear array of light sources. Light from the light sources is collimated using a corresponding array of catadioptric lenses, and the collimated light is homogenized in the tangential plane using two cylindrical lens arrays set in tandem to one another. The homogenized light is then collimated in the sagittal plane using a cylindrical lens that is set perpendicular to the lenses of the two cylindrical lens arrays to yield a wide linear beam. To produce an area beam, the linear array of light sources can be replaced with a two-dimensional array, and the cylindrical lenses can be replaced with spherical lenses.

Abstract: A multi-segment optical component applied to increase signal-to-noise ratio includes a base, a central lens portion, an isolating lens portion and a collecting lens portion. The central lens portion is disposed on center of the base. The isolating lens portion is disposed by a side of the central lens portion, and the collecting lens portion is disposed by the other side of the central lens portion opposite to the isolating lens portion. At least one of the isolating lens portion and the collecting lens portion has a curvature radius different from a curvature radius of the central lens portion, and the curvature radius of the isolating lens portion can be similar to or different from the curvature radius of the collecting lens portion. The central lens portion has a central axle which does not overlap a curvature center of one of the isolating lens portion and the collecting lens portion.

Abstract: A scanning microscope includes: a varifocal lens that scans an object in an optical-axis direction of an objective; a scanner that scans the object in a direction orthogonal to the optical axis of the objective; and a controller configured to control the varifocal lens and the scanner.

Abstract: Provided herein are systems and methods for multi-color imaging using a microscope system. The microscope system can have a relatively small size compared to an average microscope system. The microscope system can comprise various components configured to reduce or eliminate image artifacts such as chromatic aberrations and/or noise from stray light that can occur during multi-color imaging. The components can be configured to reduce or eliminate the image artifacts, and/or noise without substantially changing the size of the microscope system.

Abstract: A microscope system includes: a microscope main body including an objective lens arranged in such a manner that an optical axis of the objective lens is aligned with an observation light path of the microscope main body; and an automatic focus unit including a light source, a dichroic mirror arranged so as to be inserted on or to be deviated from the observation light path and configured to reflect light emitted from the light source in a direction of the optical axis of the objective lens, and a dichroic mirror moving mechanism. The microscope main body further includes a controller having a dichroic mirror movement control unit configured to control the dichroic mirror moving mechanism to move the dichroic mirror to an arrangement position of the dichroic mirror on the observation light path, the arrangement position being correlated to the objective lens in advance.

Abstract: A microscope slide for histological or cytological use with a non-inverted optical microscope, preferably a bright field microscope, comprising a substantially flat elongated body, said body comprising a first surface and a second surface spaced from the first surface, the body comprising an aperture through the body, wherein the second surface is substantially flat and an optically transparent coverslip is mounted on said second surface to cover said aperture.

Abstract: An image output device according to the present disclosure includes: an image acquisition unit that acquires an image with a first resolution; a high-resolution image acquisition unit that acquires an image with a second resolution, being an image of higher resolution than the image with the first resolution; an enlargement input unit that accepts input of an enlargement ratio; a determination unit that determines whether or not an evaluation score determined based on the accepted enlargement ratio is higher than a certain value; and a transmission unit that transmits the image with the second resolution if the evaluation score is determined to be higher than the certain value, and does not transmit the image with the second resolution if the evaluation score is determined not to be higher than the certain value.

Abstract: A system and method for incorporating partially coherent illumination models into the problem of phase and amplitude retrieval from a stack of intensity images. The recovery of phase could be realized by many methods, including Kalman filters or other nonlinear optimization algorithms that provide least squares error between the measurement and estimation.

Abstract: A far-optical device comprising a reversal system and an adjustable optical magnification means with more than fourfold magnification, wherein the far-optical device has an optical beam deflection means which at all magnifications ensures a subjective field of view of the far-optical device of at least 22° at least for light of a wavelength of about 550 nm.

Abstract: The present invention provides an improved variable magnification device. The improved variable magnification device includes: a rotation bunch disposed around the outer side of lens barrel of a telescopic sight and moving a magnification lens mounted in the telescopic sight by turning around the outer side; a clamp unit covering the outer side of the rotation bunch and turning with the rotation bunch; and a handle disposed on the clamp unit and provided as a handle for a user to turn the rotation bunch, in which the clamp unit is detachably coupled to the rotation bunch.

Abstract: An endoscope includes a single lens that has a square exterior shape in a direction perpendicular to an optical axis, an image sensor that has an square exterior shape which is same as the exterior shape of the single lens, in the direction perpendicular to the optical axis, a sensor cover that has an exterior shape which is same as the exterior shape of the single lens, in the direction perpendicular to the optical axis; and a bonding resin portion that fixes the sensor cover to the single lens, The single lens is a lens which is formed in a prismatic shape. The single lens has first surface on an imaging subject side that has a plane, and has second surface on an imaging side that has a convex surface.

Abstract: An endoscope system has observation modes making observations with lights having optical characteristics different from each other. The system includes an endoscope including an insertion section provided with an illumination window, a light guide arranged in the insertion section, and including an entrance end on which the lights enter and a plurality of light guide areas that guide the lights entered on the entrance end, and an entrance area switching unit that switches between the light guide areas through which the entered lights are guided by switching between areas on which the lights enter at the entrance end in accordance with an observation mode.

Abstract: An endoscope includes, in a tip portion of an insertion unit: an image sensor having a photodetecting surface as defined herein; an imaging optical system as defined herein; a holding frame as defined herein; and a tip portion of a treatment tool channel as defined herein, and, in a cross section taken perpendicularly to the optical axis, a thickness, on a first axis that intersects the optical axis and a center of the treatment tool channel, of frame wall portions, located on two respective sides of the optical axis and intersecting the first axis, of at least a portion of the holding frame is smaller than a thickness, on a second axis that is perpendicular to the optical axis and the first axis, of frame wall portions, located on two respective sides of the optical axis and intersecting the second axis, of the at least portion of the holding frame.

Abstract: A wavelength tunable filter selectively transmitting light of any desired wavelength within the range of 450 nm to 1100 nm without using a band pass filter is disclosed. The wavelength tunable filter comprises a plurality of polarizers and a plurality of units between the adjacent polarizers on a common optical axis in a housing. Each unit has, in order from light incident side, a quartz birefringent plate, an ultra-wide band ¼ waveplate and an ultra-wide band ½ waveplate. The ultra-wide band ½ waveplate is accommodated in a cylindrical rotatable body and it is rotated by a rotating mechanism.

Abstract: A pivot apparatus, in particular a pivot apparatus for a micromirror, a fixed base frame being connected, directly or indirectly via an intermediate frame, to a pivotable carrier element. Spring elements having flexural springs are respectively disposed between the base frame and carrier element, base frame and intermediate frame, and intermediate frame and carrier element. The use of flexural springs enables good thermal coupling between the individual components, and an increase in robustness. The pivot apparatus can be embodied in particular as a microelectromechanical system.

Abstract: In an electro-optical device, light is incident on a mirror by penetrating a cover, and the light reflected by the mirror is emitted by penetrating the cover. Here, the cover includes a first light-transmitting plate and a second light-transmitting plate facing the first light-transmitting plate, and a gap which is open toward both sides in a first direction is provided between the first light-transmitting plate and the second light-transmitting plate due to a spacer.

Abstract: There is provided a high power laser rotational optical assembly for use with, or in high power laser tools for performing high power laser operations. In particular, the optical assembly finds applications in performing high power laser operations on, and in, remote and difficult to access locations. The optical assembly has rotational seals and bearing configurations to avoid contamination of the laser beam path and optics.

Abstract: An electronic device includes an optical scanner main body provided with a vibration system, a substrate on which the optical scanner main body is mounted, and a flexible substrate connected to the substrate. The substrate includes a part on which the optical scanner main body is mounted, a part to which the flexible substrate is connected, and a notch which separates the parts from each other at least at a part between the parts in a plan view when the substrate is viewed from the thickness direction.

Abstract: A light source emits a laser light. A driver drives the light source based on a driving signal constituted by a pulse that changes a driving current value. When a luminance corresponding to a first laser output power that exceeds a threshold value is to be expressed, a controller controls the driver to supply to the light source a pulse having a first duty cycle at a first driving current value corresponding to the first laser output power. When a luminance corresponding to a second laser output power that is equal to or less than the threshold value is to be expressed, the controller controls the driver to supply to the light source a pulse having a second duty cycle that is smaller than the first duty cycle at a second driving current value corresponding to a third laser output power that exceeds the threshold value.

Abstract: Methods and apparatus relating to a camera including one or more optical chains with a light redirection device, e.g., mirror, and an outer protective cover are described. The cover maybe a flat or sloped surface or a lens. Features avoid stray light rays from reaching an image sensor of an optical chain. In some but not all embodiments a 2-sided anti-reflection coating is used on the cover to avoid or reduce back reflections from the cover into the optical system. In some embodiments mirror angles are limited to a range in which stray light reflections are directed away from the camera module. In some embodiments a tilted cover configuration is used where the cover is sloped relative to a face of the camera and/or camera module. Different features such as the sloped cover glass, control of mirror angle, and/or antireflective coating can be used alone or in combination.

Abstract: A modular compound lens comprises an elementary unit with five powered optical elements capable of imaging a field of view of approximately 100 degrees with an F-number of 1.7. The compound lens exhibits image distortion of no more than 10% and a nearly diffraction limited modulation transfer function (MTF) of up to 100 line-pairs per millimeter. Additional optical components can be added to the compound lens to widen the field of view as desired without changing the F-number and without significant increase in image aberrations.

Abstract: A heads up display system is provided for an automotive vehicle. The automotive vehicle includes an instrument panel and a windshield. The heads up display providing a first reflective mirror, a second reflective mirror, a first Fresnel lens, a second Fresnel lens, and an image display generator. The first Fresnel lens has a concave shape. The first Fresnel lens is positioned downstream of the first reflection minor and the second reflection mirror. The second Fresnel lens has a convex shape. The second Fresnel lens is positioned downstream of the first Fresnel lens.

Abstract: An optical device includes a digital visual data system, a forward optical assembly, and an elevation manual adjustment and a windage manual adjustment. The elevation manual adjustment and the windage manual adjustment are configured to adjust a position of a movable optical assembly containing an optical merging assembly independently moveable in relation to the forward optical assembly. The optical merging assembly includes a first wedge-shaped component receiving optical data from the forward optical assembly and a second wedge-shaped component adjacent to the first wedge-shaped component that receives and transmits the optical data from the first wedge-shaped component through the second wedge-shaped component toward an eyepiece assembly and that reflects digital visual data from a micro-display toward the eyepiece assembly to present a merged data view when viewed through the eyepiece assembly.

Abstract: An image display device includes a light source that emits a light beam, a screen, a scanning section that scans the screen with the light beam, an optical system, a drive section, and a screen drive circuit. The optical system generates a virtual image by using the light beam that has passed through the screen. The drive section moves the screen at least in parallel to a travel direction of the light beam. The screen drive circuit contains a drive signal table that stores an information group for use in generating a drive signal tailored to stop the screen at different stop locations over different stop periods. The screen drive circuit selects first information in the drive signal table which is associated with displaying of an image and supplies the drive section with a first drive signal generated from the first information.

Abstract: A retroreflective screen including a first film having a surface including a plurality of microrecesses, each microrecess having a bottom substantially parallel to the mean plane of the screen and first and second lateral walls substantially orthogonal to each other and substantially orthogonal to the bottom, the first and second lateral walls and the bottom of the microrecess joining at a same point and forming a trihedron.

Abstract: This display device is provided with a display unit, a beam splitter, and a first mirror. The display unit emits a first image and a second image. The beam splitter has, incident thereon, the first image and the second image which are emitted from the display unit. The beam splitter transmits the incident first image and reflects the incident second image to project the first image and the second image on a display medium. The first mirror has, incident thereon, the first image which has been transmitted through the beam splitter. The first mirror reflects the incident first image to project the first image on the display medium.

Abstract: Provided is a vehicle display device that can improve visibility without providing a feeling of strangeness to a passenger. A vehicle display device includes a display unit provided in an inner side of an instrument panel and which projects a display image, a transparent cover that transmits the display image projected from the display unit toward a windshield, and a bezel body including an opening portion that allows the display image transmitted through the transparent cover to pass through and having an outer edge portion continuing into the windshield, and the degrees of brightness of respective reflected images of the instrument panel, the transparent cover, and the bezel body, the respective reflected images being reflected in the windshield, are made uniform, and therefore dark visual recognition of any of the reflected images is suppressed, and the feeling of strangeness provided to the passenger is relieved.

Abstract: According to one embodiment, an eyeglasses wearable device includes a sensing signal acquisition module configured to acquire sensing signals from potential sensors, a display configured to display display data, a display data output module configured to transmit first display data to the display, a characteristic determination module configured to determine at least timing of blinking of the user based on variations in the sensing signals when the first display data is displayed on the display, and an oversight determination module configured to determine whether the user has overlooked an important display position in the first display data by comparing the timing of blinking with an elapsed time position of the first display data.

Abstract: A display device for a motor vehicle includes: a projection module, configured to generate an image for projection in a normal direction of view of a user of the display device in an optical path; a reflector and/or display, configured to be displaced between a rest position and at least one display position by a support, wherein the rest position of the reflector and/or display corresponds to a rest positioning state of the support, and wherein the at least one display position corresponds to a display positioning state of the support and a housing, wherein the reflector and/or display and the support are positioned inside the housing in the rest position and the rest positioning state, and at least partially, outside the housing in the at least one display position. The housing comprises a service opening and a service cover, the service cover covering the service opening.

Abstract: According to one embodiment, a spectacle-type electronic device includes a signal processor, a screen and a communication module. The signal processor which modulates the illumination light from the light source to form a signal including individual identification information. The screen positioned at a particular location within an extension of a wearer's line of sight to display the image produced by the image display and illuminated by the light source. The communication processor which communicates with a corresponding electronic device to enable information of a target represented by the image displayed on the screen to be shared by the communication processor and the corresponding electronic device.

Abstract: A light guide device may be incorporated into a virtual image display apparatus, and functionally includes a light-incident part for entrance of picture lights, a light guide part that guides the picture lights via the light-incident part, and a light-exiting part that outputs the picture lights from the light guide part to a position of an eye. In the light guide device, light guide that enables non-diffraction virtual image formation is performed with respect to lateral first directions and a pupil size is enlarged by first and second diffraction optical elements with respect to longitudinal second directions.

Abstract: Disclosed is an optical system for a head mount display, including at least a display unit that is provided on an inner surface of a leg area of an eyeglass frame to provide virtual screen light, an optical path adjusting unit that is provided on a nose support area of the eyeglass frame to convert a direction of the virtual screen light delivered from the display unit by refracting or reflecting the virtual screen light, and an optical coupling unit that is provided in an interior of an eyeglass lens or at a location that is adjacent to the eyeglass lens to combine a virtual screen and a reality screen that is introduced from the outside and deliver the combined screen to the eyes of a wearer.

Abstract: Disclosed is an optical apparatus including a display unit, a lens configured to pass an image formed by and transmitted from the display unit, a base configured to accommodate the lens therein, and an adjustment unit configured to move the lens relative to the base so as to adjust a path of light passing through the lens.

Abstract: [Problem to be Solved] The present invention has an objective to improve operability in information input in an information processing device that includes a head mounted display to enable head tracking display. [Solution] An information processing device includes a hand-held operation unit (10), a head mounted display (20), a first motion sensor (506 to 508) that can detect at least the orientation of the head of the operator, and an information processing unit (30) that executes a head tracking displaying process in which the first motion sensor is used, and a specific process corresponding to an indication of the operator identified by the motion of the operation unit, wherein the motion of the operation unit is detected using a second motion sensor (1603 to 1605) incorporated in the operation unit.

Abstract: A method of controlling a head-up display (HUD) of a vehicle to adjust the vertical position of a light bundle generated by the HUD to match an eye of a vehicle driver. A camera is operated to capture an image of a head of the vehicle driver reflected in a combiner of the head-up display. An electronic processor analyzes the image captured by the camera and determines a position of a driver's eye. The processor controls operation of an electric motor to automatically adjust the position of the combiner to align a light bundle or eyebox generated by the projector and reflected by the combiner with the eye position determined by the processor.

Abstract: A lighting apparatus includes a laser source module and a diffractive optical module. The laser source module emits a laser beam. When the laser beam is operated in a transverse mode or a multi-transverse mode, the laser beam has a first laser beam pattern. The diffractive optical module is arranged in front of the laser source module or at a location that receives the laser beam, so that the laser beam is irradiated on the diffractive optical module. The diffractive optical module includes a first structure pattern corresponding to the first laser beam pattern. After the laser beam is diffracted by the first structure pattern, a first structured light with a first structured light pattern is generated.

Abstract: The invention relates to a light-conducting device (60). The light-conducting device (60) comprises k>1 first deflection devices (U11, U21, U31, Sp1, Sp3) that are parallel to one another and arranged along a first direction (X), and k second deflection devices (U12, U22, U32, Sp2, Sp4) that are parallel to one another and arranged along a second direction (Y) perpendicular to the first direction. A third direction (Z) is perpendicular to the first and second direction (X, Y). Each of the second deflection devices (U12, U22, U32, Sp2, Sp4) is arranged in a same fourth direction (P) with respect to one of the first deflection devices (U11, U21, U31, Sp1, Sp3). The first deflection devices (U11, U21, U31, Sp1, Sp3) comprise optical axes directed in a fifth direction, and the second deflection devices (U12, U22, U32, Sp2, Sp4) comprise optical axes directed opposite to the fifth direction. The fifth direction is an angle bisector of an angle between the third and the fourth direction.

Abstract: A display apparatus and a home appliance including the display apparatus are provided. The display apparatus includes a display unit, a transparent protection layer configured to be disposed on a front surface of the display unit and has a wider area than an area of the display unit, a half mirror layer configured to adhere onto a back surface of the transparent protection layer, reflect a portion of external light, and transmit light diffused from an image display area of the display unit, and a printing layer configured to be formed on a back surface of the half mirror layer and cover the display unit. A color of a background displayed in an image display area of the display unit in response to the display unit being turned on is equal to a color of the printing layer.

Abstract: A polarization control panel capable of performing two-dimensional (2D) and three-dimensional (3D) control is discussed according to an embodiment. The polarization control panel includes a first substrate and a second substrate opposite to each other, and a first electrode and a second electrode disposed respectively on the first and second substrates. The polarization control panel further includes a lens layer disposed on the first electrode, the lens layer having a surface curved toward the second electrode, and the curved surface being rubbed in a first direction. The polarization control panel further includes an adhesive layer disposed on the second electrode and rubbed in a second direction, and an optically anisotropic layer disposed between the adhesive layer and the lens layer.