Abstract: A spectral filter (10) is provided with a long-pass filter (12) and a short-pass filter (13). The long-pass filter (12) has a film thickness gradient GL wherein film thickness increases monotonically in a single direction, and transmits light of a wavelength region longer than a cut-off wavelength WL. The short-pass filter (13) has a film thickness gradient GS wherein film thickness increases monotonically in a single direction, and transmits light of a wavelength region shorter than a cut-off wavelength WS. The long-pass filter (12) and the short-pass filter (13) are overlapped such that the single directions match each other. At the positions in the single directions, a transmittance peak is formed by the cut-off wavelength WL being shorter than the cut-off wavelength WS. The film thickness gradient GL is greater than the film thickness gradient GS.

Abstract: Provided are a polarizing plate and a display. The illustrative polarizing plate may exhibit desired characteristics in a wide range of wavelengths, and have excellent reflection and visibility at an inclined angle. For example, the polarizing plate may be used in a reflective or transflective liquid crystal display or an organic light emitting device.

Abstract: The present application relates to the field of 3D display technique, and provides a parallax device and a 3D display device. The parallax device includes a first grating unit and a second grating unit. The first grating unit includes first barriers and second barriers arranged alternately. The second grating unit includes third barriers that are in one-to-one correspondence with the first barriers. The third barriers are configured to prevent light transmitted through the first grating unit from entering and interfering with a viewing region.

Abstract: A hybrid diffraction grating, a mold used to produce the hybrid diffraction grating, and their manufacturing methods are described. In one aspect, a hybrid diffraction grating comprises a grating main body and a reflective layer. The grating main body comprises numerous diffraction structures. When viewed along a top-view direction, the numerous diffraction structures are arranged in a pattern defined by a profile. The profile determines various blaze angles of the numerous diffraction structures. The reflective layer, disposed on the diffraction structures, exhibits characteristics of the numerous diffraction structures.

Abstract: A handheld, ocular imaging device and system that employs the camera, processor and programming of a mobile phone, tablet or other smart device coupled to optical elements and illumination elements that can be used to image the structures of the eye in home-based, ambulatory-care, hospital-based, or emergency-care settings, is presented. The modular device provides multi-functionality (fluorescein imaging, fluorescence, brightfield, infrared (IR) imaging, near-infrared (NIR) imaging) and multi-region imaging (retinal, corneal, external, etc.) of the eye along with the added features of image processing, storage and wireless data transmission for remote storage and evaluation. Acquired ocular images can also be transmitted directly from the device to the electronic medical records of a patient without the need for an intermediate computer system.

Abstract: Provided is a microscope system including: a plurality of objective lenses that are selectively used to collect fluorescence from a specimen; a detecting unit that obtains image information of the specimen on the basis of the fluorescence collected by the objective lens; and an adjustment unit that adjusts the observation range of the specimen S and that divides the observation range into one or more observation regions corresponding to a capture range captured by the detecting unit, wherein the adjustment unit calculates an observation magnification at which the entire well is included in the observation range, the number of observation regions is minimized, and the resolution becomes the highest, on the basis of information about the size of the well in a multi-plate for accommodating the specimen and information about an objective magnification of the objective lens, and adjusts the observation range on the basis of the calculated observation magnification.

Abstract: The disclosure relates to a viewing optic. In one embodiment, the disclosure relates to a viewing optic having an integrated display system. In one embodiment, the disclosure relates to a viewing optic having an integrated display system for generating images that are projected into the first focal plane of an optical system.

Abstract: A retractable virtual reality device includes a rear cover, a front cover, a first restraining component, a second restraining component, and a display module. The front cover is movably combined with the rear cover. The first restraining component is fixed on the front cover. The second restraining component is movably disposed on the rear cover and for restraining the first restraining component. The display module includes a sleeve, a lens, and a display. The sleeve is fixed on the rear cover. The lens is disposed on a side of the sleeve. The display is disposed on the front cover and movably combined with the other side of the sleeve. By cooperation of the first restraining component and the second restraining component, the display and the front cover are movable relative to the lens and the rear cover, which reduces an overall size of the virtual reality device for easy carry.

Abstract: An electrochromic device comprising a counter electrode layer comprised of lithium metal oxide which provides a high transmission in the fully intercalated state and which is capable of long-term stability, is disclosed. Methods of making an electrochromic device comprising such a counter electrode are also disclosed.

Abstract: A method of calculating an optical system (OS) of an ophthalmic lens according to a given spectacle frame, said ophthalmic lens comprising a back surface (BS) and a front surface (FS) arranged to deliver an ophthalmic vision image (VI), a light-guide optical element having a proximal surface (PS) and a distal surface (DS), said light-guide optical element being arranged to output a supplementary image (SI), wherein the method comprises the steps of: providing at least a morpho-geometrical parameter data of the frame or of the light-guide optical element; optimizing the optical system (OS) according to at least the morpho-geometrical parameter data as a target.

Abstract: The present invention discloses an optical security device with full parallax diffraction optical variable image, the optical security device comprises: a base layer; and an optical assembly at least partially covering a surface of the base layer; wherein the optical assembly has a micro relief structure, so that when a beam of white light illuminates on the optical assembly, the optical assembly presents a full parallax image under the action of the micro relief structure. The present invention obtains the micro relief structure through combining the phase plate, and achieves the reconstruction of the full parallax diffraction optical variable image under the condition of white light illumination.

Abstract: A light conversion system and method for use with at least one light source providing at least one beam of polarized light. The system includes a support structure being rotatable around one of its axes, the support structure having a reflective surface which is fully or partly covered with at least one type of light conversion layer, which is in turn covered with at least one segment of a reflective polarizing sheet.

Abstract: An eyewear system having a lens and a nasion pad is disclosed. The nasion pad is configured to fit on a user's nasion and at least partially secure the eyewear in position. In one embodiment, the nasion pad has a saddle shape to prevent movement or rotation of the eyewear with respect to the user's face. A nose contact is coupled to the nasion pad. The nose contact can have a channel adapted to receive a leg extending from the lens. The lens is coupled to a retractor which provides a force to pull the lens toward the user's face. The eyewear system can be coupled to a helmet or hard hat. The lens is moveable between a first position on the user's face and a second position on the hard hat. The eyewear can be frameless and the retractor can be coupled to an engagement feature on the lens.

Abstract: The lens barrel includes an image-capturing lens unit, a mount portion including a mount member connectable to an image-capturing apparatus, and protrusion portions provided in the mount portion at multiple positions in a circumferential direction of the lens barrel. Each protrusion portion protrudes to an image side further than an image-side lens surface of a final lens disposed at a most image-side position in the image-capturing lens unit. The mount portion includes, inside the protrusion portions in a radial direction of the lens barrel, light-shielding portions capable of shielding light passing though the image-side lens surface toward inner circumferential surfaces of the protrusion portions.

Abstract: An optical filter, a process for producing an optical filter, and the use of the optical filter are provided. The optical filter includes a substrate and a filter layer on at least one side of the substrate. The filter layer has a matrix and at least one organic dye dissolved in the matrix. The filter layer has optical homogeneity.

Abstract: Apparatus and method of reducing light leakage from display devices are described. An embodiment of reducing light leakage from display devices includes providing an optical shutter that is configured to block light from a display device from being emitted into the ambient environment when the display device is in a bright state and configured to display visual information to the user. The optical shutter can be configured to transmit light from the ambient environment to the user when the display device is not displaying visual information.

Abstract: The objects of an embodiment are to improve the reliability of visual function examination and to shorten the time required for the examination. A visual function examination apparatus of an embodiment includes an application optical system, a biological information detector, and an evaluation information generator. The application optical system includes an optical scanner disposed in an optical path of laser light output from a laser light source, and is configured to apply the laser light that has travelled via the optical scanner to a retina of a subject's eye. The biological information detector is configured to detect biological information representing a reaction of a subject to application of the laser light. The evaluation information generator is configured to generate evaluation information on visual function of the subject's eye based on the biological information detected.

Abstract: A system and method for scope leveling. The scope has a scope body. The scope body has a leveling indicator. In one example, the leveling indicator is an engraved line which extends longitudinally along the length of the scope. The scope is manipulated such that the leveling indicator is properly aligned relative to a mount. The system and method results in a level scope which reduces canted angles and increases accuracy.

Abstract: A flexure-based micro-array having a plurality of micro-assemblies, each comprising: an object; and at least three electrostatic actuation modules for tipping, tilting, and/or piston-actuating the object, each actuation module comprising: a base with first and second electrodes electrically isolated from each other; an electrically conductive lever arm; a first flexure bearing suspending the lever arm adjacent the first and second electrodes so that electrical activation of at least one of the first and second electrodes produces an electrostatic moment of force on the lever arm to resiliently bias the first flexure bearing and pivot the lever arm about a fulcrum; and a second flexure bearing connecting the lever arm to the object at a connection location that is different from other connection locations of the other actuation modules so that pivoting the lever arm about the fulcrum induces the second flexure bearing to pivot the object about an object pivot axis defined between two of the other connection lo

Abstract: A prescriptive see-through eyepiece includes a meniscus lens body and an optical combiner. The meniscus lens body has an external scene side with a convex curvature and an eye-ward side with a concave curvature. The optical combiner is disposed within the meniscus lens body to combine image light incident through the eye-ward side with external scene light incident through the external scene side into a combined image. The optical combiner is partially reflective and imparts substantially no lensing power to the external scene light passing through. The optical combiner along with the concave curvature of the eye-ward side are configured to impart prescriptive lensing to the image light while the convex curvature of the external scene side and the concave curvature of the eye-ward side are configured to impart the prescriptive lensing to the external scene light.