Abstract: A multi-axis motor includes a first elongate magnet member disposed in a first orientation and a second elongate magnet member disposed in a second orientation orthogonal to the first orientation and mechanically coupled to the first elongate magnet member. The first elongate magnet member is operable to adjust a first axis of a fine axis structure. The second elongate magnet member is operable to adjust a second axis of the fine axis structure.

Abstract: A three-dimensional image display device includes a display panel that includes a plurality of pixels arranged in a matrix shape; and a viewpoint divider that includes a plurality of viewpoint dividing units that are inclined at a tilt angle. Letting a row-directional pitch and a column-directional pitch of the pixels be respectively denoted as Hp and Vp, where Hp>Vp, the tilt angle satisfies the following equation: A = tan - 1 ? b * Hp ( 3 ? b + c ) * Vp , where c is ?1 or 1, and b is a natural number that is greater than 1.

Abstract: An optical lens assembly includes first, second, third, fourth and fifth lens elements arranged in sequence from an object side to an image side along an optical axis. Only the first lens element to the fifth lens element have refracting power, wherein the optical lens assembly satisfies: 3.1?ALT/AAG, wherein ALT is a sum of thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element on the optical axis, and AAG is a sum of four air gaps from the first lens element to the fifth lens element on the optical axis.

Abstract: Provided are a rear converter lens and an imaging apparatus capable of achieving favorable optical performance and an appropriate back focal length with high magnification. The rear converter lens RCL consists of, in order from the object side, four lens-groups of positive, negative, negative, and positive lens-groups. In order from the object side, a first lens-group RG1 consists of a negative lens RL11 and a positive lens RL12, a second lens-group RG2 consists of a negative lens RL21 and a positive lens RL22, a third lens-group RG3 consists of a negative lens RL31, a positive lens RL32, and a negative lens RL33, and a fourth lens-group RG4 consists of a biconvex lens RL41 and a negative lens RL42. Here, 0.22<cf/f12<1 is satisfied, where f12 is a composite focal length of the first lens-group RG1 and the second lens-group RG2, and cf is a focal length of the rear converter lens RCL.

Abstract: A system may comprise a selectively transparent projection device for projecting an image toward an eye of a viewer from a projection device position in space relative to the eye of the viewer, the projection device being capable of assuming a substantially transparent state when no image is projected; an occlusion mask device coupled to the projection device and configured to selectively block light traveling toward the eye from one or more positions opposite of the projection device from the eye of the viewer in an occluding pattern correlated with the image projected by the projection device; and a zone plate diffraction patterning device interposed between the eye of the viewer and the projection device and configured to cause light from the projection device to pass through a diffraction pattern having a selectable geometry as it travels to the eye.

Abstract: A method for improving an OCT image of an object such as the retina of an eye, using optical coherence tomography by an imaging beam path. In order to suppress shadowing effects due to a surgical instrument moved in the imaging beam path, a time series of OCT images is produced. For an OCT image to be corrected, an area of the object lying in the image and shadowed by the instrument is determined. Another earlier OCT image in which the area of the object is not shadowed is searched in the time series. Image information for the area of the object is read from the earlier OCT image. A corrected OCT image is produced by inserting the read-image information into the OCT image to be corrected, wherein in the OCT image to be corrected, the image information replaces the area of the object which is shadowed by the instrument.

Abstract: In an eye fundus surface expansion observation screen, a surface moving image that is a moving image showing the surface of a predetermined region in a subject's eye is enlarged and displayed. In an eye fundus tomography expansion confirmation screen, a tomographic image showing the tomography of the subject's eye, which corresponds to a position selected from the surface moving image, is enlarged and displayed.

Abstract: The invention relates to a method for scanning along a continuous scanning trajectory with a scanner system (100) comprising a first pair of acousto-optic deflectors (10) for deflecting a focal spot of an electromagnetic beam generated by a consecutive lens system (200) defining an optical axis (z) in an x-z plane, and a second pair of acousto-optic deflectors (20) for deflecting the focal spot in a y-z plane being substantially perpendicular to the x-z plane, characterized by changing the acoustic frequency sweeps with time continuously in the deflectors (12, 12?) of the first pair of deflectors (10) and in the deflectors (22, 22?) of the second pair of deflectors (20) so as to cause the focal spot to move continuously along the scanning trajectory.

Abstract: A dry microscope objective includes in order starting from the object side a first lens group having a positive power, that includes single lenses, a second lens group that can move along an optical axis, and a third lens group including two concave surfaces that are air-contacting surfaces adjacent to and facing each other. Only one surface is a concave surface from among four surfaces consisting of a first lens surface, a second lens surface, a third lens surface and a fourth lens surface. The objective satisfies 0.66?NA?1 ??(1) 0.2<|?d/r1|<1 ??(2) where NA is a numerical aperture of the objective, ?d is a sum of a lens interval between the first and second lens surfaces and a lens interval between the third and fourth lens surfaces, and r1 is a curvature radius of the concave surface from among the four surfaces.

Abstract: One aspect of the disclosure relates to One aspect of the disclosure relates to eyewear, comprising a frame including a front portion and a pair of temples, each of the temples attached on opposite lateral sides of the front portion; a pair of primary lenses mounted to the front portion; and a pair of auxiliary lenses, each lens of the pair of auxiliary lenses mounted to a lens support slidably connected to a track comprising a groove within one of the temples and extending to the front portion. The auxiliary lenses can be positioned near the temples when not in use or moved to the front of the frame to overlap with the primary lens. The auxiliary lens can include various types of lenses including rigid lens. The auxiliary lenses can be corrective to augment the primary lens or tinted, for example.

Abstract: The problem addressed by the present invention is to provide a head up display device capable of counteracting sunlight without using a shutter or a reflection type polarizing film. A first concave mirror has a curvature to cause the reflected display light to intersect vertically before reaching a second mirror, and a second concave mirror serves to reflect the received display light. A case is provided with a first shield and a second shield extending near an intersecting point to sandwich a light path between the first and second concave mirrors. The first and second shields can block external light entering into the case from outside the case and proceeding toward the first concave mirror after being reflected from the second concave mirror.

Abstract: A projector and one or more optical components project a light pattern that scans at least a portion of an anterior segment of an eye of a user, while one or more cameras capture images of the anterior segment. During each scan, different pixels in the projector emit light at different times, causing the light pattern to repeatedly change orientation relative to the eye and thus to illuminate multiple different cross-sections of the anterior segment. The cameras capture images of each cross-section from a total of at least two different vantage points relative to the head of the user. The position of the projector, optical components and cameras relative to the head of the user remains substantially constant throughout each entire scan.

Abstract: An optical compensation plate comprises a substrate, a phase difference compensation layer, and an antireflection layer. The substrate is for example a glass substrate. The phase difference compensation layer is formed by oblique vapor deposition of an inorganic material on a surface of the substrate, and has a microstructure where columnar structures stand with inclination in relation to the surface of the substrate. The antireflection layer is provided on the upper side of the phase difference compensation layer, and has an uneven structure equally formed on one surface.

Abstract: The invention relates to a referencing device (1, 100) intended to be fixed to an eyeglass frame in order to spatially reference said frame, said device (1, 100) having a transverse bar (2, 102), a central extension (5), two lateral markers (3) and a central marker (4), each marker (3, 4) consisting of a light area (12) and a darker area (11). The main characteristic of a clip according to the invention is that it comprises at least one mobile fastening member (7, 8) which is able to move along at least one slide (9, 10) of the bar (2, 102).

Abstract: The conductive film has a wiring pattern which, with respect to the frequencies and intensities of moire obtained by applying a human visual response characteristic to the frequency information and intensity information of moire calculated from peak frequencies and peak intensities of the two-dimensional Fourier spectrums of the transmittance image data of the wiring pattern and the transmittance image data of a pixel array pattern, causes the sum of intensities of moire each corresponding to frequencies of moire falling within a frequency range predetermined depending on the visual response characteristic to be less than or equal to a predetermined value. The conductive film allows suppression of moire and significant improvement in visibility.

Abstract: A lens assembly according to one or more embodiments of the present disclosure and an electronic device including the lens assembly may include: a first lens having positive refractive power and disposed along an optical axis and to face an object; a second lens having negative refractive power and disposed along the optical axis and adjacent to the first lens; a third lens having positive refractive power and disposed along the optical axis and adjacent to the second lens; and a fourth lens having a negative refractive power and disposed along the optical axis and adjacent to the third lens, and having a concave face that faces an imaging surface of an image sensor. The characteristics of the lens assembly satisfy a preset requirement equation(s). The lens assembly and the electronic device as described above may be variously implemented according to embodiments.

Abstract: A variable power optical system for an endoscope comprising a first lens group having a negative power, a second lens group having a positive power and a third lens group, and wherein the first lens group includes at least a negative lens having a concave surface pointing to an image side and a positive meniscus lens having a concave surface pointing to an object side, the second lens group includes at least a meniscus lens having a convex surface pointing to the object side and a cemented lens formed by cementing together a negative lens and a positive lens, and the third lens group includes at least a positive lens having a convex surface pointing to the object side, and wherein the variable power optical system for an endoscope is configured to satisfy a predetermined condition.

Abstract: A near-infrared cut filter has an optical multilayer provided on at least one main surface of a transparent substrate, in which the optical multilayer is formed of a high-refractive index layer having a refractive index of 2.0 or more, and a low-refractive index layer having a refractive index of 1.6 or less at a wavelength of 500 nm, and the optical multilayer has a repeating structure of (anQH, bnQL, cnQH, dnQL)^n when a QWOT at the wavelength of 500 nm of the high-refractive index layer is set to QH, and a QWOT at the wavelength of 500 nm of the low-refractive index layer is set to QL, in which an average value of the an is not less than 1.5 nor more than 2.5, and a value obtained by averaging average values of the respective bn, cn, and dn is 1.0 or less.

Abstract: A method of producing a grating structure comprises the steps of forming a stamp from flexible plastic material, the stamp including a negative of a periodic grating pattern on a first surface; forming an ink by applying a polymer film to the stamp, the ink including a first surface and an opposing second surface, wherein the first surface of the ink contacts the first surface of the stamp such that the ink retains a positive of the periodic grating pattern; placing the ink and the stamp on a substrate such that the second surface of the ink contacts an upper surface of the substrate; and removing the stamp from the ink by applying a tensional force to one edge of the stamp.

Abstract: A beam expander includes a first lens unit including one of an SLM or a VFL, a second lens unit being optically coupled to the first lens unit and including one of an SLM or a VFL, and a control unit controlling focal lengths of the first and second lens units. A distance between the first and second lens units is invariable. The control unit controls the focal lengths of the first and second lens units such that a light diameter D1 of light input to the first lens unit and a light diameter D2 of light output from the second lens unit are different from each other.