Abstract: An optical imaging system includes a first lens having refractive power; a second lens having refractive power; a third lens having refractive power and cemented to the second lens; a fourth lens having refractive power; a fifth lens having refractive power and cemented to the fourth lens; a sixth lens having refractive power; a seventh lens having refractive power; and an eighth lens having refractive power. The first to eighth lenses are sequentially disposed in numerical order beginning with the first lens from an object side of the optical imaging system toward an imaging plane of the optical imaging system.

Abstract: An optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element from an object side to an image side in order along an optical axis. The first lens element to the sixth lens element each include an object-side surface and an image-side surface. The first and second lens elements are made of plastic material. The image-side surface of the third lens element has a concave portion in a vicinity of the optical axis. The fourth lens element has negative refracting power. The object-side surface of the fourth lens element has a concave portion in a vicinity of the optical axis. The object-side surface of the fifth lens element has a concave portion in a vicinity of the optical axis. The sixth lens element is made of plastic material.

Abstract: An image capturing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The fifth lens element with positive refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The sixth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, and the image-side surface thereof includes at least one convex shape in an off-axis region thereof.

Abstract: The present disclosure relates to the field of imaging technologies and, particularly, relates to a varifocal optical system. The varifocal optical system includes a front fixing group, a triple prism, a zooming group, a compensating group, an objective lens group and an image plane which are successively arranged along an incident direction of light, and a total focal length of the varifocal optical system is a fixed value; the front fixing group includes a first lens; the zooming group includes a second lens; the compensating group includes a third lens and a fourth lens arranged along an optical path direction; the object lens group includes a fifth lens; and the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all glass lenses. The present disclosure can satisfy the developing trend of miniaturization on electronic devices, and has a better imaging performance.

Abstract: A photographing optical lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. The second lens element has positive refractive power. The eighth lens element has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the eighth lens element has at least one convex shape in an off-axis region thereof, and both an object-side surface and the image-side surface thereof are aspheric. The photographing optical lens system has a total of eight lens elements. An air gap in a paraxial region is located between every two lens elements of the photographing optical lens system that are adjacent to each other.

Abstract: A lens module includes a first lens having refractive power, a second lens having refractive power, a third lens having refractive power, a fourth lens having refractive power, a fifth lens having refractive power and having a concave object-side surface and a concave image-side surface, and a sixth lens having refractive power and a concave image-side surface. The first to sixth lenses are sequentially disposed from an object side to an image side.

Abstract: A lens unit includes: an imaging optical system; and a lens barrel holding the imaging optical system. The imaging optical system includes, in order from an object side: a first lens having a positive refractive power; a second lens including at least one surface having an aspherical shape; and a third lens having a negative refractive power, at least one surface having an aspherical shape, and an inflection point other than an intersection with an optical axis.

Abstract: An innovative design for a compact objective lens for use with a digital image intensification camera is described, which uses lenses made with gradient index materials to reduce the number of lens elements required, length and weight over conventional objective lens systems.

Abstract: An optical imaging lens includes a first lens of an image-side surface with a concave portion in a vicinity of its optical-axis, a second lens of an object-side surface with a convex portion in a vicinity of its optical-axis, a third lens of an image-side surface with a concave portion in a vicinity of its optical-axis, a fifth lens of negative refractive power and with a thickness along its optical-axis larger than that of the second lens. EFL is the effective focal length of the optical imaging lens, TTL is the distance from the object-side surface of the first lens element to an image plane, ALT is a total thickness of all five lenses, the second lens has a second lens thickness T2 and an air gap G34 is between the third lens element and the fourth lens element along the optical axis to satisfy TTL/EFL?1.000, TTL/G34?12.000 and ALT/T2?12.900.

Abstract: A wide-angle lens includes a first lens group, a second lens group, and an aperture arranged in that sequence from object side to image side. The first lens group as a whole has a positive refractive power, and includes a first lens, a second lens, a third lens, and a fourth lens. The first lens has a negative refractive power. The second lens has a negative refractive power. The third lens has a negative refractive power. The fourth lens has a positive refractive power. The second lens group as a whole has a positive refractive power, and includes a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The fifth lens has a positive refractive power. The sixth lens has a negative refractive power. The seventh lens has a positive refractive power. The eighth lens has a positive refractive power.

Abstract: Additive manufacturing systems (AMS) are disclosed. The AMS may include a movable build platform, and a calibration system operably connected to the build platform. The calibration system may include a reflective element operably coupled to the build platform, a first calibration model positioned above and vertically offset from the reflective element, and a first camera substantially aligned with the first calibration model. The first camera may be visually aligned with the reflective element to capture a first reflective image of the first calibration model as reflected by the reflective element. The calibration system may also include at least one computing device operably connected to the build platform and the first camera, and configured to calibrate the build platform by: adjusting an actual inclination of the build platform in response to determining the first reflective image differs from a predetermined image of the first calibration model.

Abstract: A cell observation apparatus includes an image formation optical system control unit 51 which sets an initial scanning range of the focal position based on information relating to a thickness of a cell, forms an image of the cell at each of a plurality of focal positions within a set initial scanning range, subsequently acquires an image captured by an imaging unit 40 for each of the plurality of focal positions, estimates the thickness of the cell based on the image, updates the initial scanning range of the focal position based on the estimated thickness of the cell, and forms an image of the cell at each of a plurality of focal positions within the updated scanning range.

Abstract: A microscope system includes a microscope apparatus and a controller. The microscope apparatus includes an objective and a correction device that corrects a spherical aberration. The controller, during an interval period of a time-lapse observation, detects a reference target position of an observation target and updates correction information on the basis of at least variation information, the correction information representing a relationship between a position of the objective and a setting of the correction device and the variation information representing a variation amount of a distance from the objective to the reference target position. The controller, during an observation period of the time-lapse observation, controls the correction device in accordance with the correction information for each position of the objective determined on the basis of at least the variation information.

Abstract: A microscopy system has a detection system, which is configured to detect light of a first channel in a detection region and convert it to a first fluorescent light signal, to detect light of a second channel in a second detection region and convert it to a first correction signal, and to detect light of a third channel in a third detection region and convert it to a second correction signal. The system further includes a controller, which is configured to determine an approximation value for the spatial distribution of the concentration of the fluorescent dye in an object region using the first fluorescent light signal, the first correction signal, and the second correction signal. A first part of the emission spectrum of the fluorescent dye is detected in the first detection region.

Abstract: Systems and methods are provided for evaluating a fresh tissue sample, prepared as to fluoresce under illumination, during a medical procedure. A structured light source is configured to project a spatially patterned light beam onto the fresh tissue sample. An imaging system is configured to produce an image from fluorescence emitted from the illuminated fresh tissue sample. A system control is configured to provide a human-comprehensible clinically useful output associated with the medical procedure.

Abstract: A microscope system includes a microscope body, a camera connected to an observation optical system of the microscope body, and an XY stage on which a slide of an observation object is placed and which is configured to move in an X-axis direction and a Y-axis direction that are orthogonal to each other. The XY stage includes an XY two-dimensional scale plate. The XY two-dimensional scale plate includes a first mark configured to provide X-axis direction axis information and Y-axis direction axis information of the stage, and a second mark which is provided within an observable region of the camera on the same plane as the first mark and which is available for recognizing a position of an XY plane of the first mark in a Z-axis direction at each of a plurality of points by focus detection of the camera.

Abstract: There is provided an optical lens having an optically transparent surface coated with transducers adapted to stimulate a stimulus signal in a sample, where the optical lens is adapted to enable an optical communication between an optical source from one side of the optically transparent surface and the transducers and the sample from another side of the optically transparent surface for enabling the optical source to conduct optical operations capturing both the transducers and the sample simultaneously during a stimulation process. There is also provided a method of manufacturing the optical lens.

Abstract: A 3D localization microscopy system, 4D localisation microscopy system, or an emitter tracking system arranged to cause a phase difference between light passing to or from one part of the objective relative to light passing to or from another part of the objective, to produce a point emitter image which comprises two lobes, a separation between which is related to the position of the emitter relative to the objective of the imaging system, and in the 4D system a further property of the image or of the light to or from the objective is related to another location independent property of the emitter.

Abstract: Microscopes and methods for processing images of a sample are disclosed. In one implementation, a microscope includes an illumination assembly configured to illuminate the sample under two or more different illumination conditions. The microscope further includes at least one image capture device configured to capture image information associated with the sample and at least one controller. The at least one controller is programmed to receive, from the at least one image capture device, a plurality of images associated with the sample. At least a first portion of the plurality of images is associated with a first region of the sample, and a second portion of the plurality of images is associated with a second region of the sample.

Abstract: A night vision goggle adapter, the adapter includes a knob, a yoke, the yoke includes an attachment portion operably connected to a helmet mount, a spring operably placed between the knob and yoke, a shaft, the shaft includes a first end operably connected with the knob, and a second end, a head, the head receives a portion of the shaft and is attached to a night vision google, and a cam pivotally mounted to the second end of the shaft for movement between a release and clamped position to respectively disengage and engage the adapter to the head.

Abstract: A switch unit includes a frame body which is fixed to an opening section and in which a plurality of holes are formed, a plurality of switches provided in each of two of the plurality of holes, a soft switch cover that is disposed in each of the two holes and covers the plurality of switches, a first catch section formed as part of the switch cover in a position between the plurality of switches, a switch fixing member that is disposed in each of the two holes, is covered with the switch cover, fixes the plurality of switches to the opening section, and catches the first catch section in a position facing the first catch section, and a second catch section formed at an outer circumference of the switch cover and caught by the frame body.

Abstract: A novel optical design form for a biocular lens arrangement having a large format focal plane and large eye relief zone is disclosed. Key aspects of a large format biocular lens arrangement are: Lightweight plastic design for all but outermost lens, where more durable glass is desired; a large front aperture for comfortable eye motion; improved eye channel overlapping field of view with minimal distortion; and full color resolution.

Abstract: This rotary drive apparatus is arranged to cause incoming light coming from a light source to be emitted to an outside while changing the direction of the incoming light, and includes a motor including a hollow shaft arranged to extend along a central axis extending in a vertical direction, the hollow shaft including a through hole arranged to pass therethrough in an axial direction; a flywheel including at least one optical component arranged to reflect the incoming light or allow the incoming light to pass therethrough; and a laser module including the light source. At least a portion of the laser module is arranged below the base portion arranged to directly or indirectly support a stator. The through hole defines a light path along which the incoming light travels.

Abstract: This rotary drive apparatus is arranged to cause incoming light coming from a light source to be emitted to an outside while changing the direction of the incoming light, and includes a motor including a hollow shaft arranged to extend along a central axis extending in a vertical direction, the hollow shaft including a through hole arranged to pass therethrough in an axial direction. The through hole defines a light path along which the incoming light travels. A light-transmitting member is arranged to be in contact with an inner circumferential surface of the hollow shaft over the entire circumferential extent of the inner circumferential surface of the hollow shaft, over at least a portion of the vertical extent of the through hole.

Abstract: Disclosed herein is a mirror controller for an oscillating mirror. The mirror controller includes a processor configured to receive a mirror sense signal from the oscillating mirror and to determine a phase error between the mirror sense signal and a mirror drive signal. The processor determines the phase error by sampling the mirror sense signal at a first time, sampling the mirror sense signal at a second time at which the mirror sense signal is expected to be equal to the mirror sense signal as sampled at the first time, and generating the phase error as a function of a difference between the sample of the mirror sense signal at the second time and the sample of the mirror sense signal at the first time.

Abstract: Wavelength division multiplexing (WDM) has enabled telecommunication service providers to fully exploit the transmission capacity of optical fibers. State of the art systems in long-haul networks now have aggregated capacities of terabits per second. Moreover, by providing multiple independent multi-gigabit channels, WDM technologies offer service providers with a straight forward way to build networks and expand networks to support multiple clients with different requirements. In order to reduce costs, enhance network flexibility, reduce spares, and provide re-configurability many service providers have migrated away from fixed wavelength transmitters, receivers, and transceivers, to wavelength tunable transmitters, receivers, and transceivers as well as wavelength dependent add-drop multiplexer, space switches etc.

Abstract: An optical scanning device includes a support portion including a swingable coupling portion and a frame swingably supporting the coupling portion, a first reflecting portion coupled to the coupling portion and configured to swing together with the coupling portion, and a swingable connecting portion including a bridge and a second reflecting portion coupled to the first reflecting portion via the bridge and provided at a position away from the first reflecting portion beyond the support portion.

Abstract: A self-cleaning film system includes a substrate and a film. The film includes a monolayer formed from a fluorinated material, and a first plurality of regions disposed within the monolayer and spaced apart from one another such that each of the regions abuts, is surrounded by, and is not covered by the fluorinated material. Each of the regions includes a photocatalytic material. The system also includes a wave guide disposed adjacent the substrate. The wave guide includes a first light source configured for emitting a first portion of electromagnetic radiation towards the film having an ultraviolet wavelength of from 10 nm to 400 nm, and a second light source configured for emitting a second portion of electromagnetic radiation towards the film having an infrared wavelength of from 700 nm to 1 mm. A method of forming a self-cleaning film system configured for reducing a visibility of a contaminant is disclosed.

Abstract: Provided are an optical film which has a reflectivity of 0.50% or less with respect to all wavelengths of 400 nm, 550 nm, and 700 nm, a visible light transmittance that is higher than that of a transparent base material, and excellent rub resistance, an optical element, and an optical system. An optical film includes a transparent base material, a dielectric layer, a metal layer having an interface with the dielectric layer and containing at least silver, and an interlayer positioned between the metal layer and the transparent base material, in which a film thickness of the metal layer is less than 5.0 nm and the metal layer has a refractive index of 0.40 or less with respect to a wavelength of 550 nm.

Abstract: A focusing device includes a substrate and a plurality of scatterers provided at both sides of the substrate. The scatterers on the both sides of the focusing device may correct geometric aberration, and thus, a field of view (FOV) of the focusing device may be widened.

Abstract: In order to provide a transmission type screen having a flat scattered intensity within a predetermined scattering angle, a transmission type screen (50) according to the present invention comprising a first surface (51), and a second surface (52) opposed to the first surface (51), wherein: the first surface (51) is equipped with a microlens array (57) including a plurality of microlenses; the second surface (52) is equipped with a light diffusion surface (60); and a diffusion angle ratio of a diffusion angle of the light diffusion surface (60) relative to a diffusion angle of the microlens array (57) is not less than 0.2 and not more than 0.4.

Abstract: A head-up display system with an imaging unit for generating an image on a projection surface is described. The projection surface is provided for reflecting at least a part of the image. The projection surface includes a transparent screen having a transparent substrate and at least one electrically conductive coating with at least one functional layer on at least one surface of the transparent substrate.

Abstract: The invention relates to a head-up display device (1) for a vehicle (2) comprising:—an image generating unit (4) generating a primary light beam (7) representing a scene to be displayed, and—an optical projection system (8, 9) for projecting this scene onto an individual (3) situated inside the vehicle, the optical projection system comprising a return mirror (8) having a first face (10) and a second face (11), the first face being turned towards the image generating unit so as to reflect the primary light beam towards a combiner (9) adapted to form an image (16) of the scene visible by the individual. According to the invention, the device comprises at least one element (18) facing the second face of the return mirror and adapted to emit a secondary light beam (19) in the direction of this second face, the secondary light beam being transmitted through the return mirror towards the combiner forming an image (20) of the element visible by the individual.

Abstract: Head-up display includes display device, projection optical system, a polarization member, and a first polarizer. Display device displays an image. Projection optical system includes refraction lens. Projection optical system projects the image displayed on display device to an observer. The polarization member is disposed between projection optical system and a reflection member that reflects light from projection optical system. Transmittance of the polarization member depends on a polarization direction of transmitted light. The first polarizer is disposed behind refraction lens on an optical path starting from display device. The first polarizer rotates a predetermined polarized component by a quarter of wavelength.

Abstract: A laminated glass includes first and second glass plates to be arranged on the inside and the outside of a vehicle, respectively; an interlayer located between the first and second glass plates and bonded to the first and second glass plates; and a display area used for a head up display, including a region having a wedge shape in a cross section, a thickness at an upper end of the region in a vertical direction being greater than a thickness at a lower end of the region. A difference, ?t [mm], between a thickness of the laminated glass at a thickest portion in the display area and a thickness at a thinnest portion, and a difference, ?Tv [%], between a visible light transmittance of the laminated glass at the thickest portion in the display area and a visible light transmittance at the thinnest portion, satisfy a relation of ?Tv?2.2?t.

Abstract: The invention relates to a top-leaning electric reflection sheet device, which includes a base, a reflector stand, a linkage seat and an electric module, the electric module is provided to dolly move on the base to drive the linkage seat to move, and the bottom of the connecting portion of the reflector stand is synchronously driven to dolly move, and the elasticity provided for the linkage seat to move upwards could used to buffer vibration of the dashboard, so the reflection sheet could tightly lean on the windshield to improve stability of the reflection sheet and displayed images would not be shaken, to thereby enhance viewing quality.

Abstract: Tracking a user head position detects a change to a new head position and, in response, a remote camera is instructed to move to a next camera position. A camera image frame, having an indication of camera position, is received from the camera. Upon the camera position not aligning with the next camera position, an assembled image frame is formed, using image data from past views, and rendered to appear to the user as if the camera moved in 1:1 alignment with the user's head to the next camera position.

Abstract: A waterproofed wearable displaying device with an augmented reality function. The wearable displaying device is in form of goggles. A waterproofer is attached in front of a lens of the goggle. A receiving space defined between the waterproofer and the lens is sealed. The wearable displaying device further includes an image capturing device and a display in the receiving space. When the user wears the wearable displaying device indoors or outdoors, the display faces to the user's eyes, and modules in the device can detect air pressure and humidity in the goggles, to maintain air pressure within the goggles at a slight vacuum compared to the air pressure outside.

Abstract: A virtual reality display apparatus includes at least one display and at least one optical assembly. The display provides an image beam to a left eye or a right eye of a user. The optical assembly is disposed on a transmission path of the image beam and located between the left eye or the right eye of the user and the display. The optical assembly includes at least one Fresnel lens including ring structures surrounding an optical axis thereof. Each of the ring structures includes an effective refraction surface and an optically non-effective surface connected to each other and arranged along a radial direction. A junction of the effective refraction surface and the optically non-effective surface has a round angle. The radius of curvature of the round angles of at least some of the ring structures of the Fresnel lens is smaller than 10 ?m and larger than 0 ?m.

Abstract: A half mirror includes a silver layer and an anti-aggregation layer in contact with the silver layer. The anti-aggregation layer may be composed of ITO or IGO. Alternatively, the anti-aggregation layer may be composed of an organic molecular film having a thiol group. Alternatively, the anti-aggregation layer may be composed of an alloy including silver in an amount of 97% or more and an element X, in which the element X is any one of Au, Mg, Zn, Cu, Al, Si, Pd, Sn, Pt, Ti, and Cr.

Abstract: Embodiments described herein relate to a waveguide imaging structure. The waveguide imaging structure generally includes an input coupling region, a waveguide region, and an output coupling region. In certain embodiments, a photochromic material layer is disposed on an output coupling region of the imaging structure. Also described herein are methods and materials for forming the photochromic material layer.

Abstract: A dichroic prism synthesizes display light emitted from a plurality of display panels, and a plate-shaped light guiding section guides the synthesized light to a light-emitting section. In the display light emitted from the respective pixels of the display panel, although a radiation angle of an effective luminous flux which reaches the eye of an observer is large in a direction corresponding to the vertical direction, a range of incident angle of intersecting effective luminous fluxes to the dichroic mirror is small.

Abstract: An Augmented Reality apparatus is provided, whereby the apparatus utilizes existing eyewear as an attachment platform, and the apparatus is attachable to and detachable from a plurality of different eyewear having different shapes and sizes, whereby a portion of the apparatus rests on the top of the eyewear, and whereby the apparatus provides fully or mostly unobstructed vision when the wearer is looking straight ahead.

Abstract: A display device includes a light source, a first optical system, a first mirror, a changing element, and a second optical system. The light source emits a light beam. The first optical system converts the light beam emitted from the light source into a collimated light beam. The first mirror reflects the light beam coming through the first optical system while rotating around a first axis. The changing element changes a traveling direction of the light beam reflected by the first mirror. The second optical system deflects the light beam coming through the changing element. The changing element changes the traveling direction of the light beam such that an angle of the light beam in the traveling direction which has been reflected by the first mirror is changed more greatly in a peripheral section than in a central section.

Abstract: Systems, devices, and methods that implement waveguides in curved transparent combiners that are well-suited for use in wearable heads-up displays (WHUDs) are described. Curved transparent combiners employ an optical lens or optical lens blank with a waveguide or light guide embedded therein and with low refractive index materials interposed between one or more major surfaces of the waveguide and the optical lens or blank to facilitate total internal reflection while the waveguide is embedded in the lens. The curved transparent combiners may optionally include in-couplers and/or out-couplers to provide transparent combiners that substantially match a shape, size, and geometry of conventional eyeglass lenses and can, in some implementations, embody prescription curvatures to serve as prescription eyeglass lenses. The waveguides and in-/out-couplers are planar or curved depending on the implementation. WHUDs that employ such curved transparent combiners are also described.

Abstract: Systems, devices, and methods that implement waveguides in curved transparent combiners that are well-suited for use in wearable heads-up displays (WHUDs) are described. Curved transparent combiners employ an optical lens or optical lens blank with a waveguide or light guide embedded therein and with low refractive index materials interposed between one or more major surfaces of the waveguide and the optical lens or blank to facilitate total internal reflection while the waveguide is embedded in the lens. The curved transparent combiners may optionally include in-couplers and/or out-couplers to provide transparent combiners that substantially match a shape, size, and geometry of conventional eyeglass lenses and can, in some implementations, embody prescription curvatures to serve as prescription eyeglass lenses. The waveguides and in-/out-couplers are planar or curved depending on the implementation. WHUDs that employ such curved transparent combiners are also described.

Abstract: Systems, devices, and methods that implement waveguides in curved transparent combiners that are well-suited for use in wearable heads-up displays (WHUDs) are described. Curved transparent combiners employ an optical lens or optical lens blank with a waveguide or light guide embedded therein and with low refractive index materials interposed between one or more major surfaces of the waveguide and the optical lens or blank to facilitate total internal reflection while the waveguide is embedded in the lens. The curved transparent combiners may optionally include in-couplers and/or out-couplers to provide transparent combiners that substantially match a shape, size, and geometry of conventional eyeglass lenses and can, in some implementations, embody prescription curvatures to serve as prescription eyeglass lenses. The waveguides and in-/out-couplers are planar or curved depending on the implementation. WHUDs that employ such curved transparent combiners are also described.

Abstract: An Augmented Reality apparatus is provided, whereby the apparatus utilizes existing eyewear as an attachment platform, and the apparatus is attachable to and detachable from a plurality of different eyewear having different shapes and sizes, whereby a portion of the apparatus rests on the top of the eyewear, and whereby the apparatus provides fully or mostly unobstructed vision when the wearer is looking straight ahead.

Abstract: In a frame part, a center portion having a thick structure is provided between a first optical member as a first light guide unit and a second optical member as a second light guide unit to connect to both and fixes relative positions of the first optical member and the second optical member by the center portion, and thereby, reduction in weight and size of the frame part is realized.

Abstract: A method according to at least one embodiment of this disclosure includes detecting a motion of a head-mounted device (HMD) associated with a first user. The method further includes outputting to the HMD a video corresponding to the motion of the HMD. The method further includes outputting the video to a display terminal associated with a second user different from the first user. The method further includes receiving input associated with the video from the display terminal by receiving input to the display terminal by the second user. The method further includes outputting an image corresponding to the input to the HMD.