Abstract: A device for pressing against each other a first ophthalmic lens having a first face and a second ophthalmic lens having a second face in order to build an electrochromic cell comprising a cavity delimited by the first and second faces, the first and second ophthalmic lenses being superposed and an adhesive substance being applied on at least one of the first and second faces to form the cavity, comprises the first and second ophthalmic lenses and at least one spring adapted to apply a pressure effort on the first and second ophthalmic lenses. It further comprises a programmable electric motor adapted to actuate said at least one spring and to control said pressure effort.

Abstract: One aspect of the present disclosure provides a display panel and a display device. The display panel includes an array substrate, an opposite substrate disposed opposite to the array substrate, and a sieve plate between the array substrate and opposite substrate. The sieve plate includes sieve holes penetrating the sieve plate along the thickness direction of the display panel. The display panel further includes electrophoretic particles that include first-color electrophoretic particles. The particle size of at least one of the first-color electrophoretic particles is smaller than the size of the sieve hole. The first-color electrophoretic particle may freely pass through the sieve hole toward the output surface of the display panel.

Abstract: Waveguide-based beacon configurations for tracking, for example, virtual reality (VR) controllers, are disclosed. In some implementations, a device may include a light emitting diode, a waveguide, and an optical element. The waveguide may be formed within a frame of the device for a virtual reality headset. The optical element may be configured to couple a light from the light emitting diode into the waveguide. The waveguide may be configured to emit at least a portion of the light out of the waveguide as multiple beacons for tracking an orientation and a displacement of the device.

Abstract: An apparatus includes an eye cover adapted to be removably mounted on a head-worn computer with a see-through computer display and a flexible audio headset mounted to the eye cover. The flexible audio headset is mounted to the eye cover with a magnetic connection.

Abstract: A finity-corrected microscope objective for scanning applications has a numerical aperture of at least and an object field diameter of at least 1 mm. The objective is apochromatically corrected over a spectral bandwidth of at least 200 nm. A distance between an object plane and an intermediate image plane conjugated thereto is not more than 250 mm.

Abstract: An imaging lens system includes, sequentially from an object side toward an image side: a front lens group Gf including: a first lens, which is a meniscus lens having negative power with an object-side surface whose convex surface faces the object side; a second lens, which is a meniscus lens with the object-side surface whose concave surface faces the object side; and a third lens having positive power; an iris; and a rear lens group Gr including: a fourth lens having positive power; a fifth lens, a sixth lens constituting a cemented lens; and a seventh lens. The imaging lens system satisfies a following Expression (1): 2.0<Frg/F<3.0??(1) where Frg is a composite focal length of the rear lens group Gr and F is a focal length of an entire optical system.

Abstract: An observation optical system includes a display element, and an eyepiece lens disposed on an eyepoint side with respect to the display element. The eyepiece lens includes a first negative lens having strongest negative refractive power among lenses included in the eyepiece lens, a first positive lens disposed adjacent to a display element side of the first negative lens, and a second positive lens disposed closest to the display element side among positive lenses disposed on the eyepoint side with respect to the first negative lens. The number of lenses included in the eyepiece lens is greater than or equal to five. The observation optical system satisfies predetermined conditional expressions.

Abstract: Provided are a broadband waveplate device having a simple configuration and being capable of precisely performing optical modulation and a method of fabrication the broadband waveplate device, the broadband waveplate device including a first conductive layer, a multiple-quantum-well layer in which well layers and barrier layers are alternately stacked, disposed on the first conductive layer, and an antenna layer disposed on the multiple-quantum-well layer and having a shape of a plurality of stripes parallel to one another.

Abstract: Some embodiments of the technology disclosed herein relate to a lens assembly including a lens base and a lens fill. The less base is constructed of a first material and defines a lens interior surface and a plurality of ribs extending axially from the lens interior surface. The plurality of ribs define a plurality of cavities between the plurality of ribs. The lens fill is constructed of a second material and is located within the plurality of cavities. The first material includes a plastic and the second material includes a plastic.

Abstract: An optical switch that switches an optical path of signal light obtained by modulating carrier light by a control signal and a data signal, includes an optical modulation element that reflects or refracts the signal light and includes cells each having an independently set phase modulation amount with which the signal light is emitted in a direction corresponding to a ratio of a period of the control signal to a period of the carrier light.

Abstract: A dual vision device designed to generate a second vision in addition to a direct vision of a user, independent of the direct vision and located in the upper part of the field of vision of the user.

Abstract: There is provided a microscopy device capable of (i) moving a liquid immersion objective lens to a location where liquid, such as an oil or water, can be applied to the liquid immersion objective lens, and (ii) moving the liquid immersion objective lens having liquid applied thereto to a sample holder, to be used to acquire images of a sample. The liquid application process can be automated so that the liquid on the objective lens is replenished as necessary. The device can automatically focus the lens to facilitate scanning, and can be configured to change objective lenses. Other embodiments, including using such a device in high content/high throughput scanning, are also described.

Abstract: A head-mountable device can include modules that provide vision correction and operable connections between the modules. By providing head-mountable devices with modular features, certain lens assemblies can provide the desired vision correction for any given user and facilitate exchange with a different lens assembly for a different user. The lens assembly can identify itself and/or a feature thereof (e.g., vision correction and/or user identification) via an operable connection through the optical assembly onto which it attaches. By providing the operable connection through the optical assembly, part count, weight, complexity, and install procedures can be reduced. By sealing the cable providing the operable connect from an external environment, the reliability and robustness of the connection can be enhanced.

Abstract: Folded digital cameras, comprising a lens with N?3 lens elements Li and having an EFL, an aperture diameter DA, a f-number f/#, a TTL, and a BFL, wherein each lens element has a respective focal length fi and wherein a first lens element L1 faces an object side and a last lens element LN faces an image side; an image sensor having a sensor diagonal (SD); and an optical path folding element (OPFE) for providing a folded optical path between an object and the image sensor, wherein the lens is located at an object side of the OPFE, wherein the EFL is in the range of 8 mm<EFL<50 mm, and wherein a ratio between the BFL and the TTL fulfills BFL/TTL>0.75.

Abstract: Provided is a wavelength selective switch where crosstalk is improved and miniaturization is realized. The wavelength selective switch includes: one or more input ports; one or more output ports; a polarization controller that adjusts a polarization state of light incident from the input ports; a dispersive element that demultiplexes wavelength-multiplexed light incident from the input ports; and a deflection element that controls deflection of the demultiplexed light. The dispersive element is a liquid crystal diffraction element having a liquid crystal alignment pattern where an orientation of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction.

Abstract: A lens barrel includes a lens barrel main body that holds an imaging optical system, a first operation member that is provided around the lens barrel main body and adjusts an optical function of the imaging optical system, and a second operation member that is provided around the lens barrel main body and varies a degree of adjustment of the optical function by the first operation member. The second operation member is provided near the first operation member.

Abstract: A hybrid zoom drive actuator includes a first carrier having a first lens attached thereto, a second carrier located anterior or posterior to the first carrier along the optical axis and having a second lens attached thereto, a housing enclosing the first and second carriers, a first driving unit capable of moving the first carrier along the optical axis, a driving magnet attached to the second carrier, a driving coil facing the driving magnet and capable of providing driving force to move the second carrier along the optical axis, a Hall sensor capable of detecting the position of the second carrier, and a first circuit board equipped with the driving coil and the Hall sensor.

Abstract: Embodiments of the present application generally relate to augmented reality and virtual reality glasses having stacked lenses. The augmented reality (AR) and virtual reality (VR) glasses includes a pair of lenses retained by a frame. A lens stack is utilized in the pair of lenses. The lens stack may include multiple metasurfaces that improve the focus adjustment for both the real and virtual images as well as a prescription lens or prescription metasurface in the lens stack. The metasurfaces are coupled to a waveguide combiner to assist in overlaying virtual images on ambient environments. By utilizing a lens stack, the total weight of the glasses will decrease.

Abstract: A wavefront manipulator can be arranged in the beam path of a head-up display between a projection lens and a curved projection surface having a number of fixed characteristics. The wavefront manipulator can include a plurality of optical elements with different representational functions, each representational function at least partly correcting an aberration caused by at least one fixed characteristic of the curved projection surface.

Abstract: Provided is a method for determining a required adaption of a bias of an electro-optic modulator. The electro-optic modulator includes an input waveguide that is split into two paths. The two paths are then recombined into an output waveguide. The method includes the steps of recording a modulation voltage applied to the electro-optic modulator over a particular amount of time; recording a power at an output of the electro-optic modulator in response to the modulation voltage over the particular amount of time; correlating the recorded modulation voltage and the recorded power; and determining the required adaption of the bias based on the correlation between the recorded modulation voltage and the recorded power.