Abstract: An optical prism mounting system is described that includes a prism having a flexible insertion tab system. Also described, is a prism holder having an insertion channel, and a method of mounting the prism in a tonometer. The flexible insertion tab system includes a spring tab and a bendable tab; the spring tab is flexed as the prism moves along the channel; the flexible insertion tab system connects with the prism holder and snaps into a locked position at the end of the channel; and the prism and the prism holder can be separated after use by disengaging the flexible insertion tab system. An optical operating range of the optical prism is from about 0 ADC to about 600 ADC, and the maximum time for setting the tonometer is not more than about 150 seconds.

Abstract: A spatially compact, lightweight positioning system for guiding an operator in positioning an ophthalmic instrument relative to an eye of a test subject has first and second light sources and an area detector spaced apart from a measurement axis of the instrument and from each other for providing positioning images which may be evaluated relative to stored calibration image information to determine current position of the instrument relative to the eye. The first and second light sources may fit within a lateral distance less than or equal to 25 mm. First and second illumination axes associated with the light sources may reside in a horizontal plane containing the measurement axis, and an observation axis of the area detector may reside in a vertical plane containing the measurement axis. The light sources and the area detector may be intersected by a plane which is normal to the measurement axis.

Abstract: The present invention is capable of making it difficult to perceive the narrowness of a display area of a virtual image. Provided is a head-up display which projects display light on a transmission/reflection part to display a first virtual image in an area in which the virtual image can be displayed, said area being superimposed on an actual view outside of a vehicle, wherein, when deviation occurs in the relative positions of the actual view and the transmission/reflection part from the perspective of a viewer, a control unit enlarges a virtual image display area, which sets the range in which the first virtual image is displayed within the area in which the virtual image can be displayed, so as to be larger than normal.

Abstract: Spinnable frames for spectacles are provided. A spinnable frame allows a user to hold a distal end of one of the temples and freely spin the remainder of the spectacles around that end of the temple. A spin joint is provided in at least one of the temples that allows this spinning action. The spin joint may span an interface between the distal end of the temple and a proximal end of the temple, the proximal end being coupled to a front portion of the frame at a hinge interface. In this way, the temple arm is allowed to fold against the front portion for compact storage, as with conventional eyeglass frames, while facilitating spinning of the spectacles in a way that avoids excess forces on the hinge interface and/or other portions of the frame or lenses mounted therein.

Abstract: Nosepiece for eyeglass frames, which comprises a plate, to which an appendage is fixed that is provided with a first through hole, and a cup which is provided with two second through holes and houses at its interior the appendage with the first through hole aligned with the second through holes. The nosepiece also comprises a screw having the stem inserted in the first through hole of the appendage and screwingly engaged in one of the second through holes of the cup. The screw is provided with an annular groove made on the stem, and the appendage comprises at least one retention tooth projecting into the first through hole and housed within the annular groove of the screw for the retaining of the latter.

Abstract: A Progressive Lens Simulator comprises an Eye Tracker, for tracking an eye axis direction to determine a gaze distance, an Off-Axis Progressive Lens Simulator, for generating an Off-Axis progressive lens simulation; and an Axial Power-Distance Simulator, for simulating a progressive lens power in the eye axis direction. The Progressive Lens Simulator can alternatively include an Integrated Progressive Lens Simulator, for creating a Comprehensive Progressive Lens Simulation. The Progressive Lens Simulator can be Head-mounted. A Guided Lens Design Exploration System for the Progressive Lens Simulator can include a Progressive Lens Simulator, a Feedback-Control Interface, and a Progressive Lens Design processor, to generate a modified progressive lens simulation for the patient after a guided modification of the progressive lens design. A Deep Learning Method for an Artificial Intelligence Engine can be used for a Progressive Lens Design Processor.

Abstract: A dry objective includes: first lens group that includes a plurality of meniscus lens components and has a positive power; a second lens group that includes a cemented lens, turns a pencil of diverging light from the first lens group into a pencil of converging light, and has a positive power; and a third lens group that includes a front group and a rear group and has a negative power, the front and rear groups having concave surfaces adjacent to and facing each other. The dry objective satisfies the following conditional expression: 0.43?(hg2?hg1)/gt1?0.9??(1) where gt1 indicates a thickness that a lens component of the rear group that is the closest to the object has on an optical axis; hg1 and hg2, the heights of an axial marginal light ray at the lens surface of the lens component that is the closest to the object and an image.

Abstract: A method of controlling tint for a plurality of electrochromic devices, performed by a control system, is provided. The method includes receiving a request to change tint level of a plurality of electrochromic devices, and consulting transfer functions for tint level relative to drive for each of the plurality of electrochromic devices, wherein at least one of the plurality of electrochromic devices has a transfer function differing from at least one other of the plurality of electrochromic devices. The method includes driving each of the plurality of electrochromic devices in accordance with the transfer functions, so as to coordinate tint level or rate of change of tint level across the plurality of electrochromic devices.

Abstract: There is provided a head-up display device which has a small size and of which the aberration is small and the range of an eye box in a vertical direction is wide. The head-up display device 10 includes a first optical system that includes at least one concave mirror arranged along an optical path of display light in order from an image display surface 1, and a second optical system that includes at least one concave mirror arranged along the optical path of the display light in order from the image display surface 1 side. An intermediate image is formed between the first and second optical systems on the optical path, and the first optical system includes a double reflection mirror that reflects the display light twice on the optical path.

Abstract: An ophthalmologic apparatus includes: an ophthalmologic apparatus body having: an objective lens that faces a subject's eye; a first illumination optical system that irradiates a cornea of the subject's eye with illumination light emitted from a first illumination light source along an optical axis overlapping an optical axis center of the objective lens; an interference image capturing camera that takes an image of a corneal reflection light through the objective lens and outputs an imaging signal; and a calculation unit that calculates, based on a corneal reflection image, of a corneal reflection light, input from the interference image capturing camera, a thickness of a tear fluid film at each position on the corneal surface; and a guide rail that supports the ophthalmologic apparatus body.

Abstract: A spatial light modulator (SLM) is provided that includes an optical resonator (i.e., pixel) having nanoscale size. The optical resonator having nanoscale size includes a phase-change material such as, for example, a GeSbTe alloy, sandwiched between silicon nitride cladding layers. The phase-change material can undergo a crystalline-to-amorphous phase transition which is characterized by a large change in optical properties of the resonator.

Abstract: A spatial light modulator includes a substrate, a phase change material cell on the substrate, the phase change material cell including an electrical heater on the substrate, an optical reflector layer on the electrical heater, and a phase change material layer on the optical reflector layer.

Abstract: The invention relates to a display (1) comprising: an image generation unit comprising at least one light emitter (23), a printed circuit support plate (22), on which said emitter (23) is mounted, and a light sensor (30) capable of delivering a signal representative of a light intensity received by same, the display (1) being adapted in such a way that the luminosity of an image generated by the image generation unit is controlled as a function of said signal. According to invention, the light sensor (30) is mounted on said printed circuit support plate (22).

Abstract: A high-performance optical absorber includes: a texturized base layer, the base layer comprising one or more of a polymer film and a polymer coating; and a surface layer located above and immediately adjacent to the base layer, the surface layer joined to the base layer, the surface layer comprising a plasma-functionalized, non-woven carbon nanotube (CNT) sheet. A method using capillary force lamination (CFL) for manufacturing a high-performance optical absorber, includes: texturizing a base layer of the high-performance optical absorber, the base layer comprising one or more of a polymer film and a polymer coating; joining a surface layer of the high-performance optical absorber to the base layer, the surface layer comprising a non-woven carbon nanotube (CNT) sheet; wetting the joined surface layer and base layer with a solvent; drying the joined surface layer and base layer; and treating the resulting base layer with plasma, creating the high-performance optical absorber.

Abstract: An adjustable mirror assembly includes a mirror having a reflective surface. The adjustable mirror assembly may include a first locking mechanism configured to lock a support in a finite number of discrete positions. The support may be movable between a lowered position and a raised position. The mirror may be pivotally mounted to the support and may be configured to pivot about a second pivot axis to orient the reflective surface of the mirror in an aft-facing direction in both the lowered position and the raised position.

Abstract: A rear attachment lens according to the aspect of the embodiments is configured to vary a focal length of a system by being attached to an image side of a master lens. The rear attachment lens includes a positive lens arranged closest to the image side in which a lens surface on the image side of the positive lens has a shape convex toward the image side. A focal length of the rear attachment lens, a magnification of the rear attachment lens when attached to the master lens, and a distance from the lens surface on the image side of the positive lens to a rear principal point position of the rear attachment lens when attached to the master lens are appropriately set.

Abstract: The disclosure provides a collimating lens. In order from a laser transmitter side to a to-be-measured object side, the collimating lens includes a first lens, a second lens, a third lens and an aperture stop. The first lens is a lens with positive power and includes a convex object side surface. The second lens is a lens having negative power and includes a concave object side surface. The third lens is a lens having positive power and includes a convex image side surface. The change rate of the refractive index of the first lens with temperature in the range of 0 to 60° C. satisfies that (dn/dt)1>?10×10?6/° C. So, the aging of the lens can be effectively delayed. With the same size laser transmitter, the focal length of the system is larger, the field of view angle is smaller.

Abstract: A telescope system includes a telescope and a selective shielding unit including at least one member including a passage allowable region for an observation target electromagnetic wave and a passage blocking region for the observation target electromagnetic wave. The telescope includes a position detectable detector that detects the observation target electromagnetic wave on a surface different from a focal plane of the telescope. The selective shielding unit is disposed on a front side of the detector. Patterns of the passage allowable region and the passage blocking region of the at least one member and disposition of the at least one member are set to allow for reconstruction of an observation image based on an image detected in the detector.

Abstract: A progressive ophthalmic lens includes at least one multifocal surface, in which at each point of its surface, an astigmatism value and a gradient of astigmatism value can be measured, the lens including: a far-vision zone with a reference point (FV), a near-vision zone with a reference point (NV), an intermediate vision zone with a progression path that connects the far vision zone and the near vision zone, a foveal projection, and a para-foveal projection, and said lens defining a lens addition. When the lens addition is different than 2.00 D, the astigmatism value is k*Add*0.41 D, where Add indicates the lens addition and k is 0.5 and, if the progression path is shorter than 15 mm, the maximum astigmatism value of the foveal projection is (?0.03*d) D/mm+0.86 D, and when the lens progression path is larger than 15 mm, the maximum astigmatism value of the foveal projection is (?0.02*d) D/mm+0.71 D.

Abstract: The invention relates to a method, in particular a fluorescence microscopy or endoscope imaging method for intensity normalization, a non-transient computer readable storage medium (101) and a controller (51) for an endoscope (3) or microscope device (5). In the prior art, common observation devices (1) as surgical microscopes, endoscopes (3) or microscopes (5) have the disadvantage that it is ambiguous whether a detected intensity (97) is due to fluorophore (29) concentration or due to optics setting parameters (73). The inventive method overcomes said disadvantages by automatically adjusting at least one exposure control parameter (83) if at least one optics setting parameter (73) is changed.