Abstract: An arrangement, for light sheet microscopy, including: a sample vessel, for receiving a medium containing a sample, oriented with respect to a plane reference surface; illumination optics with an illumination objective for illuminating the sample with a light sheet; and detection optics with a detection objective. The optical axis of the illumination objective and the light sheet lies in a plane which forms a nonzero illumination angle with the normal of the reference surface. The detection objective has an optical axis that forms a nonzero detection angle with the normal of the reference surface. The arrangement also includes a separating-layer system for separating the sample-containing medium from the illumination and detection objectives. The separating-layer system contacts the medium with an interface parallel to the reference surface. The illumination angle and detection angle are predetermined based on numerical apertures of the detection objective and of the illumination objective, respectively.

Abstract: A microscope, in particular according to any of the preceding claims, consisting of an illuminating device, comprising an illumination light source and an illumination beam path for illuminating the specimen with a light sheet, a detection device for detecting light emitted by the specimen, and an imaging optical unit, which images the specimen via an imaging objective in an imaging beam path at least partly onto the detection device, wherein the light sheet is essentially planar at the focus of the imaging objective or in a defined plane in proximity of the geometrical focus of the imaging objective, and wherein the imaging objective has an optical axis, which intersects the plane of the light sheet at an angle that is different from zero, preferably perpendicularly, wherein an amplitude and/or phase filter is provided in the illumination beam path, said filter acting as a sine spatial filter in that it limits the illumination light in at least one spatial direction by filtering the spatial frequencies that

Abstract: Embodiments are disclosed of an eye-mountable device (EMD) including a lens enclosure including an anterior layer and a posterior layer sealed to the anterior layer. An anterior electrode is disposed within the lens enclosure on a concave side of the anterior layer, a posterior electrode is disposed within the lens enclosure on a convex side of the posterior layer, and an electrochromic element is disposed across a central region of the lens enclosure, wherein the electrochromic element separates the anterior electrode from the posterior electrode within the central region.

Abstract: The disclosure is directed to an element that is capable of acting as both an optical polarizer and an optical attenuator, thus integrating both functions into a single element. The element comprises a monolithic or one piece glass polarizer (herein also call the “substrate”), a multilayer “light attenuation or light attenuating” (“LA”) coating that has been optimized for use at selected wavelengths and attenuations deposited on at least one polarizer facial surface, and a multilayer anti-reflective (AR) coating on top of the LA coating. The disclosure is further directed to an integrated optical isolator/attenuator comprising a first and a second polarizing elements and a Faraday rotator for rotating light positioned after the first polarizing element and before the second polarizing element, the integrated optical isolator/attenuator both polarizing and attenuation a light beam from a light source.

Abstract: An optical lens of the present disclosure assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, an optical filter and a sensor. The optical lens also has an axis. The first lens element and the fifth lens element have negative power, the second lens element, the third lens element, the fourth lens element and the sixth lens element have positive power.

Abstract: A photographing optical lens assembly includes, in order from an object side to an image side, 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. The first lens element with negative refractive power has an image-side surface being concave. The second lens element has an image-side surface being concave. The fourth lens element has an image-side surface being convex. The sixth lens element has an object-side surface being concave. The photographing optical lens assembly has a total of six lens elements.

Abstract: An iodine-based polarizer includes a polyvinyl alcohol-based film; and iodine adsorbed and oriented in the polyvinyl alcohol-based film, the iodine-based polarizer having be undergone a treatment with a treatment bath containing at least one reducing agent, the iodine-based polarizer containing an oxidized form of the reducing agent, wherein the total content of the reducing agent and the oxidized form is from 0.06×10?6 mol/g to 1.6×10?6 mol/g. The iodine-based polarizer has a sufficiently high level of transmittance, degree of polarization, and other optical properties and can suppress light leakage in short-wavelength.

Abstract: Provided is an optical system including, in order from an object side to an image side, a first lens unit having a negative refractive power, an aperture stop, and a second lens unit having a positive refractive power, in which an average value ?IR(G2p)AVE of partial dispersion ratios of materials of positive lenses included in the second lens unit and an average value ?IR(G2n)AVE of partial dispersion ratios of materials of negative lenses included in the second lens unit are appropriately set, provided that BF and F are a backfocus and a focal length of the optical system at a wavelength of 1050 nm, respectively, and a partial dispersion ratio of a material is ?=(Ns?Nm)/(Ns?Nl), where Ns, Nm, and Nl are refractive indices of the material at wavelengths of 400 nm, 1050 nm, and 1700 nm, respectively.

Abstract: A total internal reflection prism, for use with a digital micromirror device (DMD), is provided. The total internal reflection prism comprises: a DMD-facing side; an air gap internal to the TIR prism, the air gap including a total internal reflection (TIR) surface; and an anti-reflective (AR) coating at the TIR surface of the air gap, the AR coating one or more of: optimized for transmission of DMD off-state light through the air gap; and having higher transmission at a DMD off-state angle than at an angle where one or more of illumination light and DMD on-state light are transmitted through the air gap.

Abstract: Provided is a zoom lens, including, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; a fourth lens unit having a positive refractive power; a fifth lens unit having a negative refractive power; and a rear lens group including one or more lens units, in which the third lens unit is configured to move toward the object side during zooming from a wide angle end to a telephoto end, in which an interval between adjacent lens units is changed during zooming, in which the fourth lens unit is moved in a direction having a vertical component to an optical axis during image stabilization, and in which focal lengths of the third and fourth lens units are appropriately set.

Abstract: An apparatus and method wherein the apparatus includes an image source; an exit pupil configured to be positioned proximate to an eye of a user to enable a user to view an image from the image source; and a plurality of grating areas between the image source and the exit pupil wherein the plurality of grating areas are configured to direct beams of light from the image source to the exit pupil; wherein the image source is configured to be moved relative to the plurality of grating areas to control the position of the exit pupil relative to the eye of the user.

Abstract: An apparatus for use in the measurement of the optical density of macular pigment in the human eye, and an apparatus for the use in measuring the lens optical density of a human eye. The apparatus is particularly applicable to flicker photometers, which are used to measure the macular pigment in the human eye.

Abstract: A lens moving apparatus includes a bobbin on which a first coil is disposed, a first magnet disposed around the bobbin to face the first coil, and a housing, which is disposed to surround at least a portion of the bobbin and has a first magnet mounting seat, which receives the first magnet, wherein the housing is provided with an adhesive inlet, which allows a side portion of the first magnet mounting seat to communicate with an outside surface of the housing.

Abstract: A lens module includes a first lens, an object-side surface thereof being convex; a second lens, both surfaces thereof being convex; a third lens, both surfaces thereof being concave; a fourth lens having negative refractive power, both surfaces thereof being convex; a fifth lens, an object-side surface thereof being concave; and a sixth lens, an object-side surface thereof being convex. The first to sixth lenses are sequentially disposed in numerical order from the first lens to the sixth lens from an object side of the lens module toward an image side of the lens module.

Abstract: A zoom lens system includes: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a positive refractive power; and a sixth lens group having a positive refractive power, wherein the first to sixth lens groups are sequentially arranged along an optical axis from an object side to an image plane side, and zooming is performed by moving at least one of the second lens group, the fourth lens group and the fifth lens group along the optical axis. A distance between a focal point of light having a first wavelength and a focal point of light having a second wavelength is about 50 ?m or less at a wide-angle position and a telephoto position. The first wavelength corresponds to green light, the second wavelength corresponds to near infrared (NIR) light.

Abstract: A variable focal length optical assembly may include a deformable entry lens element, a deformable first reflective element and a deformable second reflective element. Using a controller coupled to the deformable elements, an external force such as a mechanical, electrical, electromechanical, or electromagnetic force is applied to the deformable elements to provide any number of different focal lengths. Since the deformation of the deformable elements, and consequently the changes in focal length, occur much faster than the playback frame rate, a number of sub-frames, each containing an image obtained at a different focal length, are associated with each playback frame. The availability of multiple images in the form of sub-frames permits the selection of an optimal image for inclusion in the final playback frame sequence. The availability of multiple images in the form of sub-frames at different focal lengths also permits the seamless incorporation of zoom-in and zoom-out effects.

Abstract: Through the present invention, a perimetry result is obtained for a position on a retina surface designated as a position to be tested. As illustrated in the drawing, “the position of a ganglion cell (RGC)” and “the position of a photoreceptor cell (C) for sending information to the ganglion cell (RGC)” are offset on the retina surface (macular part). Here, when position (P1) is designated as a test position for testing the functioning of a ganglion cell at position (P1), the perimeter of the present invention finds “the position (P2) of the photoreceptor cell for sending information to the ganglion cell at position (P1),” presents a visual target at position (P2) rather than position (P1), and tests a visual field. The information of the visual target is sent to the ganglion cell at position (P1), and the functioning of the ganglion cell can therefore be tested.

Abstract: There is provided with a light amount adjusting device. The light adjusting device has a plurality of optical filter elements. The plurality of optical filter elements have different light transmittances. Reflected light colors from the plurality of optical filter elements are substantially equal.

Abstract: Method means for optimizing an optical lens adapted to a wearer, using an initial optical system providing stage (S1), during which an initial optical system is provided. The initial optical system has at least a light source (10), a light receiver (12) and an initial optical lens (L0) placed between the source (10) and the receiver (12), the initial optical lens a Fresnel zone, a working optical lens defining stage (S2), for evaluating a working optical lens is defined to be equal to the initial optical lens (L0), an evaluation stage (S3), during which a cost function related to the number of light rays received by the light receiver (12) that have passed through the annular step of the working optical lens, a modifying stage (S4), for modifying the annular step of the working optical lens, wherein the evaluation and modifying steps are repeated to minimize the cost function.

Abstract: An optical system includes an optical element made of resin and a reflection portion configured to reflect ultraviolet radiation. The reflection portion is provided on an optical surface located closer to an object side than the optical element, and conditional expressions 0.10?Lu/L?0.90 and |tan?1(H0/Lr)?tan?1{H0(Lr?Lu)/(Ru×Lr)}|?25° are satisfied, in which H0 represents a maximum height, from an optical axis, of an optical surface closest to the object side, Lu represents a distance from the optical surface closest to the object side to the reflection portion, Lr represents a distance from the optical surface closest to the object side to the optical element, L represents a total length of the optical system, and Ru represents a radius of curvature of the optical surface on which the reflection portion is provided.