Abstract: Method for measuring the stability of a tear film of a patient using a device including a backlit translucent plate provided with a test chart positioned in front of at least one eye of the patient, at least one digital photographic camera connected to a computing system, and a camera lens pointing towards the patient's eye to photograph a reflection of a test chart pattern on the patient's. The method includes, from a starting time constituted by an eyelid blink, capturing a succession of images, detecting a succession of micro-movement areas in the images, and computing and storing data on the position, surface area and number of micro-movement areas of the tear film in each image, and computing and storing surface area and number of micro-movement areas of the tear film, and a measurement of the amplitude of the micro-movement areas as a function of time.

Abstract: The positional deviation of an imaging target due to the switching of image capture methods is suppressed. An image capture system includes a first image capture apparatus of an optical interference type and a second image capture apparatus of an optical sheet microscope type, wherein the first image capture apparatus includes a light source unit provided so as to be shared by the second image capture apparatus, a light concentrating unit provided so as to be shared by the second image capture apparatus, a reflecting unit, a branching unit, a synthesizing unit, a first detection unit configured to detect a spectral distribution of a synthetic light, and a calculation unit configured to calculate a boundary surface position in the imaging target, and the second image capture apparatus includes the light source unit, the light concentrating unit, and a second detection unit configured to detect fluorescence.

Abstract: The present invention discloses a camera optical lens with six-piece lens including, from an object side to an image side in sequence, a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, and a sixth lens having a negative refractive power. The camera optical lens satisfies the following conditions: ?6.00f4/f5?2.00, R5/R3?50.00; and 3.00f2/f6.00. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide angle, and ultra-thin.

Abstract: An optical unit includes: a reflective portion that reflects, on a reflective surface, an incident light flux incident from the outside in a reflection direction toward an imaging element from an incident direction; a movable body to which the reflective portion is fixed; and a fixed body. In the movable body, emboss processing is applied to at least one of a reflective surface contact surface in contact with the reflective surface, and a side surface contact surface in contact with a side surface of the reflective portion on a side of an intersecting direction intersecting with the incident direction and the reflection direction.

Abstract: Embodiments disclosed herein determine an optical parameter distribution at a projection surface. Embodiments of the system disclosed herein comprise a visual field sensor and a head orientation and/or position sensor. The visual field sensor is configured to measure a visual field of a user related to a specific vision task in a visual field of a user. The head orientation and/or position sensor is configured to measure head orientation and/or position of the user in relation to the visual field during the specific vision task. The system is configured to enable computation of the user's eye orientation in relation to the head of the user based on the gaze directions of the user and the head orientation and/or position of the user to determine an optical parameter distribution at a projection surface between the visual field and a retina of the user.

Abstract: An optical imaging lens includes first to seventh lens elements sequentially arranged along an optical axis from an object side to an image side, wherein each of the first lens element to the seventh lens element includes an object-side surface facing the object side and allowing an imaging ray to pass through and an image-side surface facing the image side and allowing the imaging ray to pass through. The first lens element has positive refracting power, and a periphery region of the image-side surface of the first lens element is concave. The second lens element has negative refracting power. An optical axis region of the image-side surface of the third lens element is convex. An optical axis region of the image-side surface of the fourth lens element is concave. The sixth lens element has negative refracting power. In particular, the optical imaging lens only has seven lens elements.

Abstract: An optical imaging system includes ten lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, a ninth lens element and a tenth lens element. Each of the ten lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The second lens element has negative refractive power. The tenth lens element has negative refractive power, and at least one of the object-side surface and the image-side surface of the tenth lens element has at least one inflection point.

Abstract: The invention relates to a lens objective system comprising a lens objective comprising a set of optical elements, the optical properties of the optical elements induce optical aberrations of the lens objective. The system comprises an optical compensation element configured to manipulate a propagation path of light transmitting the optical compensation element, wherein the optical compensation element is configured and arranged relative to the lens objective so that the lateral offset caused by pupil aberration is reduced.

Abstract: A lens driving device includes a lens holding portion, a driving shaft, a vibration member, and a spring member. The vibration member is connected to one end of the driving shaft and causes the driving shaft to micro-vibrate. The spring member is fixed to the lens holding portion and includes a grip portion that sandwiches and grasps the driving shaft. Extension piece portions that protrude while being bent so as to be separated from the driving shaft are provided at end sides of the grip portion in an axial direction of the driving shaft.

Abstract: Controlling the propagation and interaction of light in complex media has sparked major interest. Unfortunately, spatial light modulation devices suffer from limited speed precluding real-time applications (e.g., imaging in live tissue). To address this problem, various embodiments use a phase-control technique to characterize complex media based on use of fast 1D spatial modulators and 1D-to-2D transformation performed by the same medium being analyzed. Some embodiments use a micro-electro-mechanical grating light valve (GLV) with 1088 degrees of freedom modulated at 350 KHz, enabling unprecedented high-speed wavefront measurements. Some embodiments continuously measure the transmission matrix, calculate the optimal wavefront and project a focus through various dynamic scattering samples in real-time, (e.g., within 2.4 ms per cycle).

Abstract: The present application provides a splicing display unit and a display screen, in order to visually eliminate the seam, improve the user's visual effect on splicing screens, and achieve a subjective visual feeling for the user as if there was no seam. The display screen includes a plurality of display modules and a plurality of optical structures, the plurality of display modules and the plurality of optical structures being closely arranged; each of the display modules includes a display area and a black edge area arranged around the display area, black edge areas of adjacent two display modules are spliced together to form a seam; one end of the first surface of the optical structure close to the seam is a first arc surface, and the first arc surface is configured to refract light emitted from the display area of the display module, and then distribute the refracted light in a front-view area corresponding to the seam.

Abstract: A head-mounted display device and a zoom lens module are provided. The zoom lens module includes a first fixing frame, an arc zoom ring, a second fixing frame, and a first non-circular lens. The first fixing frame has an arc segment and a non-arc segment connected to each other. The arc segment has a slot. The arc zoom ring is disposed on an inner side of the arc segment and capable of sliding in a circumferential direction of the arc segment. An outer side of the arc zoom ring has a slide bar. An inner side of the arc zoom ring has a guide block. The slide bar passes through the slot and is adapted to slide along the slot. The second fixing frame is disposed on an inner side of the first fixing frame and the arc zoom ring and capable of sliding in an axial direction of the arc segment. An outer side of the second fixing frame has a guide rail. The guide block is embedded in the guide rail and adapted to slide along the guide rail.

Abstract: Optical systems including a reflective polarizer are described. The reflective polarizer includes first and second reflection zones, such that for light substantially normally incident on the reflective polarizer, the first zone substantially reflects light in a first wavelength range and substantially transmits light in a different non-overlapping second wavelength range, and the second zone substantially reflects light in the second wavelength range and substantially transmits light in the first wavelength range. The first and second reflection zones have first and second thicknesses having corresponding first and second mid-points separated by a distance d. In some embodiments, a longitudinal chromatic aberration of the optical imaging system of the first wavelength range to the second wavelength range caused when reducing d so that the first and second reflection zones are immediately adjacent is a distance h where 0.3 h?d?0.7 h.

Abstract: Disclosed is an image stitching-based aerial image formation apparatus, including sequentially along an optical path direction: an image source comprising a plurality of display units arranged in an array; a rear lens group comprising a plurality of optical lens units arranged in an array; and a front lens group, wherein light rays passing through the rear lens group are converged via the front lens group to render a real image in midair. The disclosure offers the following benefits: by splitting the image source into a plurality of display units arranged in an array and constituting the rear lens group by a plurality of optical lens units arranged in an array, the image is split into smaller patches, such that the longitudinal distance needed for chromatic aberration adjustment also decreases, which shrinks the longitudinal dimension of the whole apparatus so as to be better adapted for installation in a narrow space.

Abstract: An image projector for injecting a collimated image into an entrance aperture of a lightguide employs collimating optics including a polarizing catadioptric arrangement to provide enhanced proximity of the principal plane of the collimating optics to the entrance aperture of the lightguide, thereby reducing the size of the optics or allowing an enlarged field of view for optics of a given size. Disclosed embodiments employ a front-lit polarization-modifying spatial light modulator (SLM) illuminated via a polarizing beam splitter (PBS) prism with a 30-degree or 45-degree PBS angle, laser scanning illumination arrangements, with or without an SLM, and active-matrix image generators combined via a dichroic combiner cube.

Abstract: Diffractive backlight fabrication employs a diffraction grating to scatter light from a light guide and define a reflective island that is aligned with the diffraction grating. A method of fabricating a diffractive backlight includes providing the light guide having the diffraction grating, diffractively scattering guided light out of the light guide using the diffraction grating to selectively expose photoresist and provide an opening in the photoresist, and depositing a reflective material into the opening to form a reflective island that is aligned with the diffraction grating. A reflective diffraction grating element of the diffractive backlight includes the diffraction grating and reflective island.

Abstract: A vibration wave driving apparatus includes a vibrator configured to vibrate and movable relative to a friction member to generate a driving force, a pressing member configured to pressurize the vibrator, a transmission member configured to transmit a pressing force by the pressing member to the vibrator, a holding member configured to hold the vibrator, and a viscoelastic member configured to connect the holding member and the transmission member to each other.

Abstract: A zoom optical system according to an embodiment of the present invention includes a first lens group, a second lens group, a third lens group, and a fourth lens group which are sequentially disposed in a direction from an object side to an image side, wherein the second lens group and the third lens group are movable, a total track length (TTL) is less than 20 mm, and an effective focal length (EFL) in a telephoto is greater than 25 mm.

Abstract: A camera device according to one embodiment of the present invention comprises: a base; a first lens assembly which is disposed in the base and includes a first lens group and a first lens support unit to which the first lens group is fixed; a second lens assembly which is disposed in the base and includes a second lens group and a second lens support unit to which the second lens group is fixed; and a driving unit for moving the second lens assembly, wherein a first stopper member and a second stopper member are formed on the inner wall of the second lens support unit and spaced apart from each other by a distance that is greater than the height of the first lens assembly along the movement direction of the second lens support unit, the first lens assembly is accommodated between the first stopper member and the second stopper member in the second lens support unit, and the second lens assembly moves alongside the first lens assembly within the base.

Abstract: The invention provides a method and a system for generating a polarized propagation-invariant light field. The system includes a laser source, a spatial light modulator, a computer, a first lens, a shading element, a first quarter-wave plate, a second quarter-wave plate, a second lens, and a beam combining element. In the present invention, two Laguerre-Gaussian mode beams that satisfy a particular Gouy order relationship are generated, and orthogonal even polarization is applied to the two Laguerre-Gaussian mode beams. The two Laguerre-Gaussian mode beams are then focused onto a Ronchi grating to be stably combined into polarized propagation-invariant light field. The light field generated in the present invention simultaneously has linear polarization, elliptical polarization, and circular polarization in a cross section of the light field, and in a propagation process of the light field in free space, apart from normal spot size scaling, polarization distribution remains unchanged.