Abstract: A lens assembly of a viewing element for an endoscope has lenses and a barrel containing the lenses. The internal surface of the barrel is shaped in accordance with the relative position and size of the lenses and a lens holder encompassing at least a portion of the barrel. The barrel and/or the lens holder are injection-molded and can be variably positioned relative to each other. An optional adhesive layer that reduces or eliminates small particles from the viewing element is positioned on an inner surface of the barrel and/or lens holder and used to remove any internal particulate matter that may otherwise obstruct the field of view.

Abstract: Provided are an optical lens, a camera module and a front camera. From an object side to an Imaging plane, the optical lens sequentially includes: a stop; a first lens having a positive focal power and a concave object side surface; a second lens having a negative focal power and a concave image side surface; a third lens having a positive focal power, a convex object side surface and a concave image side surface; a fourth lens having a positive focal power, a concave object side surface and a convex image side surface; a fifth lens having a negative focal power. An entrance pupil diameter EPD of the optical lens is smaller than 1.58 mm, and the maximum distance between the projection of an entrance pupil and the projection of the object side surface of the first lens on the optical axis is greater than 0.17 mm.

Abstract: A system and method of generating white light for a projection system in a compact form factor using laser diodes, a reflection system, and a phosphor target. Light emitted from the laser diodes can be directed towards a region of the phosphor target, where the phosphor target is excited and emits light in a desired spectrum in all directions. Some emitted light is collected by a collection lens. The emitted light collected by the collection lens can be combined with light from the original laser diodes to create white light for use in the projection system. Light emitted in a direction away from the collection lens can be redirected to the collection lens by the reflection system that employs a curved reflector on one side of the phosphor target and a flat reflector on the opposite side of the phosphor target.

Abstract: A metasurface may include a substrate layer and a two-dimensional array of metallic optical pillars arranged in rows and columns. A tunable dielectric material with a tunable refractive index is positioned between row-adjacent optical resonators. A two-dimensional active-matrix driver includes integrated driver routing layer(s), capacitor layer(s), and/or transistor layer(s). The driver routing layers enable row and column addressing of the two-dimensional array of metallic pillars via a row conductor for each row of metallic pillars and a column conductor for each column of metallic pillars. A transistor layer includes transistor devices connected to and configured to be selectively driven by the row and column conductors. The capacitor layer includes a plurality of storage capacitors. Each metallic pillar is connected in parallel to one of the storage capacitors in the capacitor layer and one of the transistor devices in the transistor layer.

Abstract: Optical apparatus (38) includes an electro-optical layer (46), contained within a transparent envelope (43, 44) and having an effective local index of refraction at any given location that is determined by a voltage waveform applied across the electro-optical layer at the location. An array of excitation electrodes (50) is disposed over a surface of the transparent envelope. Control circuitry (42) is configured to apply voltage waveforms to the excitation electrodes so as to generate across at least a part of the active area of the electro-optical layer a phase modulation profile (60, 63, 64, 65, 66, 67, 70) comprising spatially alternating peaks (61) and troughs (62) separated by phase transitions chosen so as to emulate a Fresnel lens. The troughs have respective phase modulation depths that vary by at least one quarter wavelength at a nominal wavelength of 500 nm across at least the part of the active area of the electro-optical layer that emulates the Fresnel lens.

Abstract: A method is provided for operating one or more one solid-state electro-optic device to provide an electrically switching shutter. The method includes forming an alternating stack of first semiconductor layers having a first dopant and second semiconductor layers having a second dopant to form at least one superlattice semiconductor device. The method further includes applying to the at least one superlattice semiconductor device a first voltage to induce a transparent state of the alternating stack such that light is transmitted through the alternating stack, and applying to the at least one superlattice semiconductor device a second voltage different from the first voltage to induce an opaque state of the alternating stack such that light is inhibited from passing through the alternating stack.

Abstract: An optical image capturing lens assembly includes six lens elements, the six lens elements being, in order from an object side to an image side: a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element with negative refractive power, a fourth lens element with positive refractive power, a fifth lens element, and a sixth lens element with negative refractive power.

Abstract: A LIDAR system includes a transmitter unit constructed and arranged to generate light and a photodetector structure for detecting received, reflected light. An actively tunable narrow band optical filter structure is located upstream of the photodetector structure to filter out wavelengths of light associated with sunlight prior to being received by the photodetector structure. The filter structure is constructed and arranged to change optical filtering thereof so as to change wavelengths of light permitted to pass there-through. A photodiode detects light passing through the filter structure. A control unit is associated with the photodiode and the filter structure and is constructed and arranged such that based on the light detected by the photodiode, the control unit can cause the filter structure to change the optical filtering thereof by heating or rotating the filter structure so as to compensate for drifting or broadening of a wavelength of the transmitter unit.

Abstract: A backplane, a dimming method thereof, and a display device having same are disclosed. The display device includes the backplane which has a first substrate and a second substrate opposite to each other, an electrolyte layer, and a driving electrode which is connected to the first substrate and the second substrate, respectively. When the driving electrode is controlled to apply different voltages between the first substrate and the second substrate, the electrolyte layer shows different translucent states.

Abstract: Provided herein is an electro-optic display having a layer of electrophoretic material, a first conductive layer, and a piezoelectric material positioned between the layer of electrophoretic material and the first conductive layer, the piezoelectric material overlaps with a portion of the layer of electrophoretic material, and a portion of the first conductive layer overlaps with the rest of the electrophoretic material.

Abstract: The present invention discloses a method for calibrating controllable phase shifters in a multi-stage staggered Mach-Zehnder interferometer structure on an optical chip, aiming to solve the problem of calibrating the controllable phase shifters in a configurable optical network of the multi-stage staggered Mach-Zehnder interferometers. The technical solution is to calibrate the controllable phase shifters that can be calibrated in the optical network; and then to constitute calibration conditions for and calibrate inner phase shifters that has not been; and finally to constitute calibration conditions for and calibrate outer phase shifters that is not calibrated.

Abstract: A variable magnification optical system has, in order from an object side: a first lens group having positive refractive power; a second lens group having negative refractive power; an aperture stop; a third lens group having positive refractive power; and a rear lens group. Upon zooming from a wide-angle end state to a telephoto end state, at least the rear lens group is moved toward the object side, and distances between the lens groups are varied. Upon focusing from an infinitely distant object to a closely distant object, the third lens group is moved along the optical axis. At least a portion of the rear lens group constitutes a vibration reduction lens group having negative refractive power and moveable perpendicular to the optical axis. An optical apparatus and a method of manufacture are also provided.

Abstract: A device is provided. The device includes a waveguide configured to output a first light having a first polarization to a first side of the waveguide and a second light having the first polarization to a second side of the waveguide. The device also includes an optical element assembly disposed at the first side of the waveguide and configured to convert the first light having the first polarization into a third light having a second polarization, and output the third light toward the waveguide. The device further includes a polarizer disposed at the second side of the waveguide and configured to transmit the third light having the second polarization, and block the second light having the first polarization.

Abstract: An accommodating contact lens comprises a variable focus optical module, which comprises an optical chamber and one or more eyelid engaging chambers coupled to the optical chamber with one or more extensions comprising channels extending between the optical chamber and the more eyelid engaging chambers. The module may comprise a self-supporting module capable of supporting itself prior to placement in a contact lens to facilitate placement prior to encapsulation in the contact lens. The module may comprise one or more optically transmissive materials, provides improved optical correction, and can be combined with soft contact lens materials such as hydrogels. In many embodiments, the module comprises a support structure extending between an upper membrane and a lower membrane in order to provide variable optical power accurately with decreased amounts distortion and improved responsiveness to eyelid induced pressure.

Abstract: An optical metasurface which shifts resonant frequency in response to changing temperature. The optical metasurface includes a membrane printed in a pattern from materials with a high coefficient of thermal expansion (“CTE”). The optical metasurface can include a plurality of high CTE fibers/structures in a first direction and a plurality of low CTE fibers/structures in a second direction perpendicular to the first direction. Alternatively, the high CTE substrate can include a plurality of high CTE fibers/structures in only a first direction. The high CTE substrate can include a plurality of high CTE fibers and a plurality of low CTE fiber in a pattern which creates desired sensing domains. An array of nanostructures is formed on the high CTE substrate. The array of nanostructures is designed to resonate with light transmitted through or impinging upon the optical metasurface. The resonant frequency of the response can be tuned thermally.

Abstract: An optical system includes an illumination layer, an optical combiner, and an active optics block. The illumination layer includes an array of point light sources configured to emit calibration light. The optical combiner is configured to pass visible light to a front side of the optical system and to direct the calibration light to a camera that generates an image in response to the calibration light. The image includes an array of points corresponding to the array of point light sources. The active optics block includes an adjustable lens disposed between the illumination layer and the optical combiner and is configured to pass the calibration light to the optical combiner and to focus the visible light. The active optics block is further configured to adjust an optical power of the adjustable lens based on the image of the array of points.

Abstract: A head mounted display system can include a camera, at least one waveguide, at least one coupling optical element that is configured such that light is coupled into said waveguide and guided therein, and at least one out-coupling element. The at least one out-coupling element can be configured to couple light that is guided within said waveguide out of said waveguide and direct said light to said camera. The camera can be disposed in an optical path with respect to said at least one out-coupling optical element to receive at least a portion of the light that is coupled into said waveguide via the coupling element and guided therein and that is coupled out from said waveguide by said out-coupling coupling element such that images may be captured by said camera.

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 facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through. The optical imaging lens satisfies: EFL/(T1+T3)?2.300. EFL is an effective focal length of the optical imaging lens. T1 is a thickness of the first lens element along the optical axis. T3 is a thickness of the third lens element along the optical axis.

Abstract: A laser beam output apparatus includes a pulsed laser output section, an optical path determining section, a wavelength changing section, and a multiplexer. The pulsed laser output section outputs a laser beam having a predetermined wavelength as first pulses. The optical path determining section receives the first pulses and determines one among a plurality of optical paths for each of the first pulses for output. The wavelength changing section receives light beams traveling, respectively, through the plurality of optical paths and changes the light beams to have their respective different wavelengths for output. The multiplexer multiplexes outputs from the wavelength changing section.

Abstract: The present disclosure provides night vision binoculars with a replaceable objective lens. The night vision binoculars include: a main body, an objective lens and a locking member. The main body is provided with a mounting base; the objective lens is provided with a locking hole and detachably inserted into the mounting base. The objective lens rotates in the mounting base; and the locking member is slidingly disposed on the main body and provided with a locking position and an unlocking position. When the locking member is in the locking position, the locking member is inserted into the locking hole; and when the locking member is in the unlocking position. The objective lens can be removed from the mounting base. Through the above structure setting, the user is convenient to disassemble the objective lens; and the night vision binoculars are simple in structure and convenient to use.