Abstract: Methods and apparatus for optical imaging and scanning of holes machined, drilled or otherwise formed in a substrate made of composite or metallic material. The method utilizes an optical instrument for imaging and scanning a hole in combination with an image processor configured (e.g., programmed) to post-process the image data to generate one complete planarized image without conical optical distortion. The optical instrument includes an optical microscope with confocal illumination and a conical mirror axially positioned to produce a full 360-degree sub-image with conical distortion. In the post-processing step, a mathematical transformation in the form of computer-executable code is used to transform the raw conical sub-images to planar sub-images. The planarized sub-images may be stitched together to form a complete planarized image of the hole.

Abstract: The present disclosure is drawn to privacy films for electronic displays. In one example, a privacy film for an electronic display can include a louver film. The louver film can include: a plurality of high refractive index slats with a refractive index of about 1.5 to about 3 and having a trapezoidal cross section narrowing toward a viewer side of the louver film; and a plurality of low refractive index slats between the high refractive index slats, having a refractive index less than the refractive index of the high refractive index slats by about 0.1 to about 2. An electrophoretic ink can be optically associated with the low refractive index slats, including opaque particles that are electrically mobile to cause modification of light transmission therethrough. A first and second transparent electrode film can be on a viewer side and a rear side of the electrophoretic ink, respectively.

Abstract: Techniques are provided to optomechanically couple light to a crystal structure, thereby producing stable, coherent bulk acoustic modes within the structure. In some embodiments, a resonator may comprise a plano-convex crystal structure to which pump light may be applied. The pump light may transfer energy to acoustic phonon modes of the crystal structure so as to create acoustic phonon modes with a coherence length greater than a length of the crystal structure. High frequency and high quality factor resonators may thereby be produced and operated.

Abstract: An optical-lens-set includes a first lens element of a concave image-side surface near its optical-axis, a sixth lens element of negative refractive power and of a concave image-side surface near its optical-axis to go with a fifth lens element of a concave object-side surface near its optical-axis or with a seventh lens element of negative refractive power. The Abbe number ?1 of the first lens element, the Abbe number ?3 of the third lens element, the Abbe number ?4 of the fourth lens element, the Abbe number ?5 of the fifth lens element, the Abbe number ?6 of the sixth lens element and the Abbe number ?7 of the seventh lens element together satisfy 5?5?1?(?3+?4+?5+?6+?7).

Abstract: There is provided an optical body with improved antireflection capability, a display device, and a method for manufacturing an optical body, the optical body including: a first concave-convex structure formed on a surface of a base material; and a second concave-convex structure superimposed on the first concave-convex structure. An average concave-convex period of the first concave-convex structure is larger than a wavelength in a visible light region, an average concave-convex period of the second concave-convex structure is less than or equal to the wavelength in the visible light region, and projecting parts of the second concave-convex structure extend in a direction normal to a flat plane of the base material.

Abstract: An ophthalmic microscope including an observation optical system having a first focal point in front of an eye; an objective auxiliary lens positionable on the eye side of an objective lens in the observation optical system or releasable therefrom, a focal point when the objective auxiliary lens is positioned to a second focal point on an anterior ocular eye position; and a front lens positionable further toward the eye side than the first focal point or releasable from the position, a focal point through the eye's crystalline lens when the front lens is set to a third focal point and a posterior ocular segment position of the eye, the objective auxiliary lens set and the front lens released during anterior ocular segment observation, the front lens set and the objective auxiliary lens released during posterior ocular segment observation, without changing a positional relationship between the objective lens and eye.

Abstract: An optical coherence tomography system for ocular diagnosis includes a light source unit generating and transmitting light, a light distribution unit dividing the transmitted light into first light and second light, a reference arm generating first reference light and second reference light, whose optical path length is larger than that of the first reference light, from the first light, a sample arm irradiating the second light onto a central optical axis directed towards the central portion of the eye lens to generate first measurement light and irradiating the second light onto the eye lens in an oblique direction inclined with respect to the central optical axis at a time different from the time when the first measurement light is generated, to generate second measurement light, an interference unit allowing the first reference light to interfere with the first measurement light and the second reference light to interfere with the second measurement light to generate corresponding interference signals, an

Abstract: An eye segmentation system for determining a center point of an eye, a radius of an iris of the eye, and an area of interest from a white area (sclera) of the eye. The system includes at least one input interface that receives a facial image of a user, wherein the facial image is captured using an image capturing device and a data processing arrangement that receives the facial image of the user as input data and processes the facial image to segment an eye region of the facial image. The system determines an eye that is suitable for segmentation from a left eye and a right eye using at least one quality metric, determines a center point of the eye using at least one directional filter, determines, using the at least one directional filter, a radius of an iris of the eye from the center point of the eye.

Abstract: The present disclosure provides a camera optical lens including, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; and the camera optical lens satisfies conditions of: 0.95?f/TTL; 4.00?f2/f?6.00; and ?15.00?(R7+R8)/(R7?R8)??2.50. The camera optical lens can achieve good optical performance while meeting the design requirements for large aperture, ultra-thinness and long focal length.

Abstract: A color filter (CF) substrate includes a CF structure disposed on a base, and multiple pixel regions each including multiple sub-pixel regions. The CF structure includes a nanostructure layer including multiple nanostructures and a light guide structure layer including multiple light guide structures, sequentially provided on the base. Each light guide structure is in a corresponding pixel region, and includes multiple light guide sub-portions. Each light guide sub-portion is in a corresponding sub-pixel region. Each sub-pixel region corresponds to a nanostructure, and each nanostructure is in a corresponding sub-pixel region. Each of the light guide sub-portions in one pixel region is configured such that light incident on the light guide sub-portions exits at different angles and enters into the nanostructure in the sub-pixel region corresponding thereto. Each nanostructure is configured such that light exiting from the sub-pixel region corresponding thereto has a predetermined color.

Abstract: This invention relates to an optical filter for use in eyewear such as ski googles, as well as eyewear using the filter. For improving visibility in snow dominated locations, the filter has a transmission spectrum having a first transmission peak in the wavelength range of 620 nm-670, with a maximum at approximately 650 nm.

Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a refractive power; a fourth lens having a refractive power and an image-side surface of the fourth lens being a concave surface; and a fifth lens having a refractive power. ImgH, half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, TTL, a distance from an object-side surface of the first lens to the imaging surface on the optical axis, and f, a total effective focal length of the optical imaging lens assembly satisfy: ImgH/(TTL/f)>45 mm, which makes the optical imaging lens assembly have the features of long focus, a large image surface, etc.

Abstract: A method of manufacturing a button-enabled housing assembly includes preforming a composite button component or insert having an elastically flexible button membrane that is mounted on a rigid frame, and thereafter molding a housing over the button insert. The composite button insert is formed in a co-molding operation and can include a rigid island in the flexible button membrane for supporting a cosmetic keycap.

Abstract: A lens barrel is provided with: a stationary barrel having a large-diameter section and a recessed section which is recessed further toward the inner diameter side than the large-diameter section; a printed circuit board which is mounted so that at least part thereof is disposed along the outer peripheral surface of the stationary barrel; movable barrels positioned further toward the outer diameter side than the stationary barrel and moving relative to the stationary barrel; and a cable member having flexibility which allows the cable member to deform flexibly, the cable member being provided with a mounting section which is mounted on the printed circuit board, and also with a passage section which passes between the printed circuit board and the stationary barrels.

Abstract: A computer device implemented method includes displaying, via the computer device, content on a display device, sensing a pupil size of a user of the computer, and adjusting a luminosity setting of the display device based on the sensed pupil size and a pupil size setpoint.

Abstract: A method of controlling tint for a plurality of electrochromic devices, performed by a control system, is provided. The method includes receiving a request to change tint level of a plurality of electrochromic devices, and consulting transfer functions for tint level relative to drive for each of the plurality of electrochromic devices, wherein at least one of the plurality of electrochromic devices has a transfer function differing from at least one other of the plurality of electrochromic devices. The method includes driving each of the plurality of electrochromic devices in accordance with the transfer functions, so as to coordinate tint level or rate of change of tint level across the plurality of electrochromic devices.

Abstract: An ophthalmologic apparatus includes: a head unit having an optical system capable of receiving light reflected from a subject's eye; a drive mechanism that movably holds the head unit; an alignment detection unit that detects a position of the subject's eye relative to the head unit; and a control unit that controls the drive mechanism. The drive mechanism includes at least two arms rotatably connected together, at least two first rotation support mechanisms and at least three second rotation support mechanisms which allow the head unit to move, and at least five driving units for driving the rotation support mechanisms. The control unit is capable of controlling the driving units using a measurement result of the alignment measuring unit to align the head unit and the subject's eye with each other.

Abstract: Techniques of generating a wavefront modulating element (WME) for imaging an object over a large image field include (i) designing a WME by breaking a large image into smaller sub-images and then applying an inverse imaging operation to find a segment of a plurality of segments (324-1 to-334-n) of a WME (in the from of DOE) producing a sub-image, and (ii) specifying an optical system to illuminate the WME resulting from each of the plurality of segments in such a way that the large image is reproduced as closely as possible. Along these lines, given a large target image in the far-field, a WME generation system decomposes the target image into sub-images. From this decomposition, the WME generation system then produces WME segments corresponding to the sub-images.

Abstract: A magnifying device (100) with multiple magnifications including: an outer shell (10) forming a body of revolution with an axis of revolution (X-X) and having an inner cavity (5), a first lens (30) mounted at a first end (13) of said outer shell (10), and a second lens (20) capable of moving between a retracted position and an extended position in which said second lens (20) is superimposed on said first lens (30) so as to change the optical characteristics of the magnifying device (100).

Abstract: The invention relates to a lens having an adjustable optical power comprising a container with a frame structure delimiting a lens volume and a reservoir volume, wherein the lens volume and the reservoir volume are fluidically connected and comprise a liquid, wherein both volumes have at least one opening that are laterally shifted to each other and wherein each opening is covered by two elastically deformable membrane portions, wherein in the space enclosed between the membrane portions for each opening another liquid enclosed in. The invention further teaches a piston structure that is arranged to adjust a pressure in the reservoir volume such as to control a focal strength of the lens volume.