Abstract: A system and method. The system may include a head-up display (HUD). The HUD may include a positionable combiner optical element (COE) and a combiner alignment detector (CAD) configured to conform images displayed on the positionable COE with a view through the positionable COE. The CAD may include a mirror that moves with the positionable COE, an infrared (IR) emitter configured to emit IR pulses onto the mirror with a duty cycle of less than 1% such that an average time-based radiance of the IR pulses is compatible with a night vision imaging system (NVIS), and an IR detector configured to receive the IR pulses reflected off of the mirror.

Abstract: A reflective module includes a rotation plate supported by an internal wall of a housing; and a movable holder supported by the rotation plate and including a reflective member. The movable holder moves the reflective member in a first axis direction perpendicular to an optical axis and in a second axis direction perpendicular to the optical axis and the first axis direction. At least two ball members aligned in the first axis direction are disposed in at least one of a first gap between the housing and the rotation plate and a second gap between the rotation plate and the movable holder. A guide groove is disposed in the rotation plate and in at least one of the housing and the movable holder, and the ball members are inserted into the guide grooves. The ball members are inserted into and three-point supported by the guide grooves.

Abstract: An embodiment comprises: a housing; a bobbin arranged inside the housing; a first coil arranged on the bobbin; first magnets arranged on first to fourth corner portions of the housing, respectively; a first circuit board which is arranged on a first side portion of the housing, and which comprises a first terminal, a second terminal, a third terminal, and a fourth terminal; a first position sensor arranged on the first circuit board and electrically connected to the first to fourth terminals; a first upper elastic unit arranged on the first corner portion of the housing; a second upper elastic unit arranged on the second corner portion of the housing; a third upper elastic unit arranged on the third corner portion of the housing; and a fourth upper elastic unit arranged on the fourth corner portion of the housing. One end of the first upper elastic unit extends from the first corner portion to the first side portion of the housing and is coupled to the first terminal.

Abstract: A tintable window is described having a tintable coating, e.g., an electrochromic device coating, for regulating light transmitted through the window. In some embodiments, the window has a transparent display in the window's viewable region. Transparent displays may be substantially transparent when not in use, or when the window is viewed in a direction facing away from the transparent display. Windows may have sensors for receiving user commands and/or for monitoring environmental conditions. Transparent displays can display graphical user interfaces to, e.g., control window functions. Windows, as described herein, offer an alternative display to conventional projectors, TVs, and monitors. Windows may also be configured to receive, transmit, or block wireless communications from passing through the window. A window control system may share computational resources between controllers (e.g., at different windows).

Abstract: Disclosed is an interchangeable conversion lens for underwater photography or cinematography able to change from macro to wide angle photographic perspectives and consists of a sequential assembly of optical lens elements. This conversion lens includes an objective lens, a relay lens and a focusing unit which are positioned on an optical axis and are interrelated in their optical performance to one another. The objective lens is to form an intermediate image (reversed and inverted) from wide angle perspective to half the size of the sensor in the camera, this intermediate image is then transmitted through the relay lens and the focusing unit which projects the image through a macro lens into the sensor of a camera. The three parts can be disassembled and reassembled underwater, all three separate parts are waterproof and therefore the optical performance of water is taken into consideration in the optical system.

Abstract: Embodiments of metasurfaces having nanostructures with desired geometric profiles and configurations are provided in the present disclosure. In one embodiment, a metasurface includes a nanostructure formed on a substrate, wherein the nanostructure is cuboidal or cylindrical in shape. In another embodiment, a metasurface includes a plurality of nanostructures on a substrate, wherein each of the nanostructures has a gap greater than 35 nm spaced apart from each other. In yet another embodiment, a metasurface includes a plurality of nanostructures on a substrate, wherein the nanostructures are fabricated from at least one of TiO2, silicon nitride, or amorphous silicon, or GaN or aluminum zinc oxide or any material with refractive index greater than 1.8, and absorption coefficient smaller than 0.001, the substrate is transparent with absorption coefficient smaller than 0.001.

Abstract: The objective lens unit includes, a front lens group having a negative refractive power, a diaphragm, and a rear lens group having a positive refractive power, in order from an object side. The front lens group includes a negative lens having a concave surface facing an image surface side, and a positive lens having a convex surface facing the object side, and the rear lens group includes a positive lens having a convex surface facing the image surface side and a cemented lens in which a positive lens and a negative lens are cemented. The endoscope objective lens unit satisfies ?1.6<fF/fR<?1.2 and ?1.3<f3/fF<?0.7. Note that fF and fR are focal lengths of the entire system of the front lens group and the rear lens group, and f3 is a focal length of a positive lens, in the rear lens group.

Abstract: According to various embodiments, a tunable optical device comprises a tunable optical metasurface on a substrate with an integrated driver circuit. In some embodiments, the tunable optical device includes a photon shield layer to prevent optical radiation from disrupting operation of the driver circuit. In some embodiments, the tunable optical device includes a diagnostic circuit to detect and disable defective optical structures of the metasurface. In some embodiments, the tunable optical device includes an integrated heater circuit that maintains a liquid crystal of the metasurface above a minimum operating temperature. In some embodiments, the tunable optical device includes an integrated lidar sequencing controller, a steering pattern subcircuit, and a photodetector circuit.

Abstract: An imaging lens module includes a plastic barrel, an optical lens assembly and a glue material. The plastic barrel includes an outer object-end surface, an outer image-end surface and an inner tube surface. The inner tube surface connects the outer object-end surface and the outer image-end surface, and includes a plurality of parallel inner surfaces. A plurality of stripe structures are disposed on and protruded from at least one of the parallel inner surfaces, wherein the stripe structures are regularly arranged along a circumferential direction of the parallel inner surface. The optical lens assembly includes a plurality of optical elements disposed in the plastic barrel and arranged along the optical axis, wherein an outer annular surface of at least one of the optical elements is disposed correspondingly to the stripe structures. The glue material is applied among the outer annular surface and the stripe structures.

Abstract: A heating device for a lens of a camera includes at least one body including at least one conductive material, the at least one body forming at least one of a transparent coating, a non-transparent coating, a free standing film, a paint, or a bulk composite material, and at least two electrical contacts contacting the conductive mass for applying an electrical voltage to the conductive mass, the at least two electrical contacts being at least one of injection-molded onto the body and injected into the body.

Abstract: The system and method for combining two optical assemblies into the same volume, particularly when the field of view of the two assemblies are different, so that the overall volume and swap for the system is reduced. This also allows both subsystems to use the same external protective window, reducing overall cost for a system of co-located dissimilar optical systems in a single aperture.

Abstract: An imaging lens which uses a larger number of constituent lenses for higher performance and features a low F-value, low-profile design and a wide field of view. Designed for a solid-state image sensor, the imaging lens includes constituent lenses arranged in order from an object side to an image side: a first positive refractive power lens; a second negative refractive power lens; a third lens; a fourth lens; a fifth lens; a sixth lens having a concave image-side surface near an optical axis; and a seventh negative refractive power lens.

Abstract: Described herein is a polymorphic display, which is a unitary apparatus constructed such that a wide variety of electro-optic functions are enabled. The polymorphic display, even when having multiple pixels, enables sharing of selected structures among the pixels. In a multi-pixel construction, there is a set of pixels in the display that exhibit one set of operable properties, such as particular stability, sequencing, and switching properties, and another set of pixels that are different from the first set. That is, they have different stability, sequencing, or switching properties. In such a way, a highly flexible polymorphic display may be construed to satisfy a wide range of display needs.

Abstract: A tintable window is described having a tintable coating, e.g., an electrochromic device coating, for regulating light transmitted through the window. In some embodiments, the window has a transparent display in the window's viewable region. Transparent displays may be substantially transparent when not in use, or when the window is viewed in a direction facing away from the transparent display. Windows may have sensors for receiving user commands and/or for monitoring environmental conditions. Transparent displays can display graphical user interfaces to, e.g., control window functions. Windows, as described herein, offer an alternative display to conventional projectors, TVs, and monitors. Windows may also be configured to receive, transmit, or block wireless communications from passing through the window. A window control system may share computational resources between controllers (e.g., at different windows).

Abstract: A tintable window is described having a tintable coating, e.g., an electrochromic device coating, for regulating light transmitted through the window. In some embodiments, the window has a transparent display in the window's viewable region. Transparent displays may be substantially transparent when not in use, or when the window is viewed in a direction facing away from the transparent display. Windows may have sensors for receiving user commands and/or for monitoring environmental conditions. Transparent displays can display graphical user interfaces to, e.g., control window functions. Windows, as described herein, offer an alternative display to conventional projectors, TVs, and monitors. Windows may also be configured to receive, transmit, or block wireless communications from passing through the window. A window control system may share computational resources between controllers (e.g., at different windows).

Abstract: Provided is a metalens including a first metasurface including a plurality of first nanostructures disposed based on a first shape distribution, and a second metasurface spaced apart from the first metasurface at a distance greater than a central wavelength of a predetermined wavelength band, the second metasurface including a plurality of second nanostructures disposed based on a second shape distribution, wherein the metalens provides chromatic aberration for light in the predetermined wavelength band.

Abstract: The invention relates to the field of laser technology and can be used for more efficient optical pumping of laser media in laser generators and amplifiers. The invention can be used for the efficient optical pumping of practically all types of lasers, provided that the absorption profile of the pumped medium is sufficiently broadband. The invention discloses a method and device for combining at least two laser beams of different wavelengths, the polarization states of which are substantially orthogonal, into an exit beam by using a polarizing beamsplitter which spatially combines two beams in mutually orthogonal polarization states, and then changing the polarization state of one of the beams relative to the other using a spectrally selective polarization filter such that the polarization state of the exit beam becomes substantially identical for all of the wavelengths of the exit beam, thus permitting the subsequent combining thereof with another beam.

Abstract: An electrochromic device includes an optically active layer having an optical property that can be altered by application of electrical power to the optically active layer and a conductive structure that is configured to supply the electrical power to the optically active layer. The conductive structure includes patterned conductive elements that cooperate with the optically active layer to define electrochromic cells.

Abstract: A bottom semiconductor region is formed to include a main sub-region, extending through a bottom dielectric region that coats a semiconductor wafer, and a secondary sub-region which coats the bottom dielectric region and surrounds the main sub-region. First and second top cavities are formed through the wafer, delimiting a fixed body and a patterned structure that includes a central portion which contacts the main sub-region, and deformable portions in contact with the bottom dielectric region. A bottom cavity is formed through the bottom semiconductor region, as far as the bottom dielectric region, the bottom cavity laterally delimiting a stiffening region including the main sub-region and leaving exposed parts of the bottom dielectric region that contact the deformable portions and parts of the bottom dielectric region that delimit the first and second top cavities. The parts left exposed by the bottom cavity are selectively removed.

Abstract: An optical imaging system includes a first lens including a negative refractive power and a convex object-side surface, and a second lens including a convex object-side surface and a convex image-side surface. The optical imaging system also includes a third lens including a negative refractive power and a convex object-side surface, a fourth lens including a convex image-side surface, a fifth lens, and a sixth lens including an inflection point formed on an image-side surface thereof. The first to sixth lenses are sequentially disposed in an optical-axis direction.