Abstract: A composite prism for multi-functional telescopes, and binocular telescopic optical system thereof. The composite prism comprises a first half-pentaprism (2), a roof prism (3), and a second half-pentaprism (4). Longer right-angled surfaces of the first half-pentaprism (2) and second half-pentaprism (4) are cemented onto a bottom surface of the roof prism (3). A light incident plane of the roof prism (3) and a light emission plane thereof share the same one and are parallel to a roof edge of the roof prism (3), such that a light incident axis of the composite prism is parallel to a light emission axis thereof. A binocular telescopic optical path system comprises an objective lens (1), the composite prism, a reticle lens (5), and an eyepiece (6), and has functions of viewing, sighting, laser emitting and receiving, and display.

Abstract: The spectacle frame has a front face, with two lateral stubs, and two temples which each extend from a front end, arranged against one of the front-face stubs, to a free rear end, each temple having on the inside a rod whose front end is immobilized at the front end of the temple, the temple having driving and shaping means for driving the movable rear end of the rod by displacement in the free rear end of the temple and for thus modifying the curvature of the temple. The front end of the rod is connected to the front-face stub against which is arranged the front end of the temple, inside of which the rod extends.

Abstract: A high-performance optical absorber, having 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 is joined to the base layer and the surface layer has a plasma-functionalized, non-woven carbon nanotube (CNT) sheet, wherein the base layer texturization comprises one or more of substantially rectangular ridges, substantially triangular ridges, substantially pyramidal ridges, and truncated, substantially pyramidal ridges.

Abstract: The present disclosure provides a near-eye display system for generating a virtual image of a display, including: a display, a first lens array comprising a plurality of concave microlenses having a first pitch, and a second lens array positioned in front of the first lens array, the second lens array comprising a plurality of convex microlenses having a second pitch, wherein the first lens array is positioned on an optical path between the display and the second lens array, and wherein the first lens array has a focal plane at the display and the second lens array has a focal plane at a virtual image plane of the first lens array.

Abstract: A zoom lens includes: a master lens including in order from an object side: a positive first lens unit configured not to move for zooming; a negative second lens unit configured to move for zooming; at least one lens unit configured to move for zooming; and a positive relay lens unit arranged closest to the image side; and an extender lens unit configured to change a focal length range of the zoom lens by one of: being inserted in place of a lens unit arranged adjacent to the relay lens unit on the object side; and being inserted into a space adjacent to the positive relay lens unit on the object side, wherein the extender lens unit includes a positive lens Gp, and an Abbe number and a partial dispersion ratio of the positive lens Gp are suitably set.

Abstract: A microscope-autofocus device for feedback-controlling a focal position of an imaging system of a microscope apparatus, wherein the imaging system includes a microscope objective, a monitoring beam source for creating a monitoring beam, a detector device for detecting a drift variation of an axial objective distance between the microscope objective and a sample by sensing the monitoring beam directed through the imaging system to the sample and reflected by the sample, and a feedback loop device for controlling the imaging system in dependency on the detected objective distance variation of the microscope objective.

Abstract: An automatic strabismus detection mechanism includes a housing and an eyepiece arranged on the housing. A lens mechanism located on a same axis as the eyepiece is arranged in the housing. The lens mechanism is provided with a rotating mechanism for adjusting an angle of refraction. The automatic strabismus detection mechanism includes technical effects of being composed of the lens mechanism and automatically controlled to generate 0 to 50 prism degrees; the volume is small and the weight is light, which is lighter than that of a triangular prism block made of ordinary glass; and the manufacturing cost is low, which is about one fifth of the price of a lens row. Therefore, with the automatic strabismus detection mechanism, a variety of equipment and instruments based on the principle of triangular prism spectroscopic detection or dispersion is greatly improved, and development of related instruments and equipment is facilitated.

Abstract: A lens module includes a carrier, a framework, and an optical lens disposed on the framework. The carrier has an inner surface including a contact surface. The framework contacts the contact surface and is configured with a guiding lever disposed in a guiding recess formed across the inner surface. When the guiding lever is moved in the guiding recess, the framework is rotated on the carrier about an optical axis, and the framework and the optical are moved on the carrier along the optical axis. A projection apparatus includes an illumination system, a light valve, and a projection lens, and the illumination system includes the lens module. The lens module and the projection apparatus may be used to adjust the focusing position of the light beam passing through the optical lens to a proper position, and improve the projection quality of the projection apparatus.

Abstract: A display device includes a light projector configured to project light including an image, an optical mechanism provided on a path of the light and capable of adjusting a distance from a predetermined position to a position where the light is formed as a virtual image, a concave mirror configured to reflect light passing through the optical mechanism toward a reflector, a first actuator configured to adjust the distance in the optical mechanism, and a controller configured to control the light projector and the first actuator. The controller causes the first actuator to change the distance and causes the light projector to project light including an opening image, at a time of an operation start of the display device.

Abstract: A transparent wearable data display having a source of collimated light, a deflector for deflecting the collimated light into a scanned beam, and a first of switchable grating elements sandwiched between first and second parallel transparent substrates, which together functioning as a first light guide. A first coupling is provided for directing the scanned beam into a first total internal reflection (TIR) light path of the first light guide along the first array column. The grating elements having diffracting and non-diffracting states, in their diffracting state deflecting light out of said light guide. The grating elements are switchable into their diffracting states one group of elements at a time.

Abstract: An eyeglasses fogging prevention apparatus consists of a strip made of stretchable, elastic material. The strip has a central section made of pliant, form fitting material and strip adjustment clips for shortening and lengthening the strip. Loop sections are located at opposite ends of the strip, at least one adjustment clip being located between the central section and one of the loop sections. The apparatus is configured to be positioned across the face of a user who is wearing eyeglasses, beneath the eyeglasses of the user, with the loop end sections placed over the user's ears and the central section placed over and down the sides of the bridge of the nose of the user. The apparatus is held against the user's nose by altering the length of the strip with the adjustment clips, such that the strip is compelled tight against the nose, thereby preventing fogging of the eyeglasses.

Abstract: Methods and systems are disclosed relating to a lens system that allows for simultaneous focus of near and far-away images with one pair of glasses, heads-up-displays (HUDs), and the like, without the need to move the user's eyes. This lens system may be used in a HUD application, for example, where the user may focus on a display lens that may be approximately one inch from the eye to view computer-generated information such as altitude, temperature, directions, and the like, and simultaneously view the individual's surroundings. The lens system may include a liquid lens that when modulated may vary from a near-focus state to a far-focus state rapidly by using an electrowetting or piezoelectric hydraulic actuator. This variable rate lens may be multiplexed at a rate that allows both near and far-away images to appear in focus simultaneously through the advantageous use of a user's persistence of vision.

Abstract: A zoom optical system ZL comprises, in order from an object: a first lens group (G1) having a positive refractive power; a second lens group (G2) having a negative refractive power; a third lens group (G3) having a positive refractive power; and a subsequent lens group (GR), wherein upon zooming, distances between the lens groups change, the subsequent lens group (GR) comprises a focusing lens group that moves upon focusing, and conditional expressions 0.18<(?fF)/f1<0.30, and 0.84<(?f2)/f3<1.20, are satisfied, where fF: a focal length of the focusing lens group, f1: a focal length of the first lens group (G1), f2: a focal length of the second lens group (G2), and f3: a focal length of the third lens group (G3).

Abstract: The invention relates to a correction objective (10), comprising a first lens group (12) of positive optical power, a second lens group (14) of positive optical power, a third lens group (16) of negative optical power, and a fourth lens group (18) of positive optical power, which are arranged in this order from the object side, the second lens group (14) being movable along the optical axis (O) in such a way that the sum of the distance (V1) between the second lens group (14) and the first lens group (12) and the distance (V2) between the second lens group (14) and the third lens group (16) is constant. The image scale of the second lens group (14) lies in a range of ?0.9 to ?1.1.

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 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: Optical structures, such as antireflective structures or Bragg gratings, may include multiple layers of high-index and low-index materials. The low-index materials may be approximately a quarter-wavelength in thickness (e.g., with respect to a center wavelength of incident light) and may include a nanovoided material. The high-index material may have a thickness of a half-wavelength and may include an oxide. The nanovoided material may include about 10% to 90% nanovoids by volume and may have an average index of refraction of about 1.05 to about 1.2. The antireflective structures or Bragg gratings may include multiple layers that can be optimized for layer count, thicknesses, and refractive indices to provide a reflectance below a given threshold for incident light of a given angular range. Various other methods, systems, apparatuses, and materials are also disclosed.

Abstract: This disclosure describes a dimming panel and its driving method, a preparation method and a controlling device, and a controlling system. The dimming panel includes a substrate, a first transparent electrode layer and an insulating layer sequentially disposed on the substrate, and a curled structure disposed on the insulating layer. The curled structure includes a second transparent electrode layer that has a preset inherent force for curling. The second flexible electrode layer is configured to absorb or reflect light. The first transparent electrode layer and the insulating layer have groove structures that are formed corresponding to each other. The curled structure can be disposed within the groove structure.

Abstract: This display system includes: a projection device including a phase-modulation-type spatial light modulator element, a light source radiating light to a display part of the element, and a control circuit controlling the element and the light source; and projecting reflection light of the part of the element; and a reflecting mirror reflecting projection light of the device. The control circuit displays, on the part of the element, a first pattern and a second pattern associated with display information having different definition degrees. The reflecting mirror includes a first reflection region causing reflection light of a portion where the first pattern is displayed to enter, and reflecting the light toward a first display region, and a second reflection region causing reflection light of a portion where the second pattern is displayed to enter, and reflecting the light toward a second display region.

Abstract: A waveguide assembly is provided. The waveguide assembly includes a pair of pupil-replicating waveguides. The first pupil-replicating waveguide is configured for receiving an input beam of image light and providing an intermediate beam comprising multiple offset portions of the input beam. The second pupil-replicating waveguide is configured for receiving the intermediate beam from the first pupil-replicating waveguide and providing an output beam comprising multiple offset portions of the intermediate beam. The input beam may be expanded by the waveguide assembly in such a manner that pupil gaps are reduced or eliminated.