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.

Abstract: Methods of controlling tint of a tintable window to account for occupant comfort in a room of a building. Some methods include receiving weather feed data from one or more weather services (or other data sources) over a communication network, determining a weather condition based on the weather feed data, and determining a tint level for the tintable window based on the weather condition and based on whether a current time is within a time delay period at sunrise or sunset.

Abstract: An imaging system uses a multi-view reflector (MVR) to simultaneously measure the three-dimensional (3D) position and orientation of a light emitter. The MVR is positioned at a back focal plane (BFP) of a light collecting optical system, and uses pyramid reflectors and/or conical reflectors to reflect light in at least two regions of the BFP to at least two detection channels of a detector. The at least two detection channels produce images that are used to determine the 3D position and orientation of a light emitter. The system may be used, for example, to image the structure of molecules or organelles in a cell, track the movement of molecules in a cell, or to study the interaction of molecules within a cell.

Abstract: The coherent beam recombination system provides an output recombined beam and comprises: a laser source providing a source beam with linewidth; a beam broadener providing a broadened beam from the source beam; a splitter splitting the broadened beam into a plurality of secondary beams; a plurality of channels coupled to the splitter. Each channel receives a respective secondary beam and provides a respective intermediate beam. Each channel has an optical amplifier, a phase modulator, an optical delay line, and an opto-mechanical element. The CBC system further comprises an optical sensor that provides a detection signal indicative of an intensity of a received optical beam; a focusing optics that receives the intermediate beams, provides the output recombined beam from a first portion of each intermediate beam, and provides a sampled recombined beam to the optical sensor from a second portion of each intermediate beam.

Abstract: Disclosed is a zoom lens, including: a lens barrel, a lens group, a linear magnetic driving mechanism, and a locking structure; the lens barrel extends in a front-to-rear direction; the lens group includes at least one mobile group movably provided in the lens barrel along the front-to-rear direction; the linear magnetic driving mechanism is provided in the lens barrel and drivenly connected to the mobile group; and the locking structure includes a locking member and a locking mechanism, the locking member includes a plurality of locking grooves, and the locking mechanism includes: a latch, an electromagnetic driving mechanism and a reset member; the latch is movably provided in a direction approaching and away from each locking groove, the latch has a locking position inserted into the locking groove and an unlocking position separated from the locking groove during a moving stroke.

Abstract: A lens barrel with one or more integrated tunable lens is described. The lens barrel may be a part of an imaging device. The imaging device may include a lens, a tunable lens, and a lens barrel. The tunable lens is configured to adjust its optical power in accordance with an applied signal. The lens barrel is configured to hold the lens and the tunable lens in optical series with each other within the lens barrel. The lens barrel includes an integrated electrode that communicatively couples the tunable lens to a printed circuit board (PCB) which supplies the applied signal.