Abstract: A camera optical lens includes, from an object side to an image side, a first lens having a positive refractive power; a second lens having a negative refractive power; and a third lens having a positive refractive power, and satisfies: 0.65?f1/f?0.85; ?0.90?f2/f??0.60; 1.00?f3/f?1.20; ?8.00?(R5+R6)/(R5?R6)??2.50; 2.50?d5/d4?4.50; and 1.55?n2?1.70, where f, f1, f2, and f3 respectively denote focal lengths of the camera optical lens, the first lens, the second lens, and the third lens; R5 and R6 respectively denote central curvature radii of object side and image side surfaces of the third lens; d4 denotes an on-axis distance from an image side surface of the second lens to an object side surface of the third lens; d5 denotes an on-axis thickness of the third lens; and n2 denotes a refractive index of the second lens, thereby achieving good optical performance while meeting requirements of ultra-thinness and a wide angle.

Abstract: The present disclosure discloses a camera optical lens satisfying following conditions: ?2.70?f1/f??1.20; ?3.00?f2/f??1.50; ?3.50?f4/f??2.00; 3.00?R3/R4?10.00; and 3.00?d5/d6?6.00; where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; f2 denotes a focal length of the second lens; f4 denotes a focal length of the fourth lens; R3 denotes a central curvature radius of an object-side surface of the second lens; R4 denotes a central curvature radius of an image-side surface of the second lens; d5 denotes an on-axis thickness of the third lens; and d6 denotes an on-axis distance from an image-side surface of the third lens L3 to an object-side surface of the fourth lens L4. The camera optical lens provided in the present disclosure satisfies a design requirement of wide angle while having good optical functions.

Abstract: A luminous flux collector comprises a housing, a wide-angle light capturing device and an optical collimating device, arranged around a longitudinal axis. The housing surrounds and protects the wide-angle light capturing device and the optical collimating device. The housing also provides structural support to hold the other elements in position. The wide-angle light capturing device can include a receptacle for receiving a light source, and the wide-angle light capturing device collects light with a spread angle of at least 120 degrees from the light source. The wide-angle light capturing device is disposed within a proximal end of the housing along the longitudinal axis. The optical collimating device extends from the wide-angle light capturing device to a distal end of the housing along the longitudinal axis.

Abstract: A camera lens or lens group of reduced overall length includes a first lens with positive power, a second lens with negative power, a third lens with positive power, and an imaging element. The first, object side, lens includes a first surface and a second surface, the second lens includes a third surface and a fourth surface, and the third lens includes a fifth surface and a sixth surface. The camera lens satisfies conditions of 1.00<D/TTL<1.25; 0.85<|F1|/|F|<0.95; 3.85<|F2|/|F|<4.15; and 21.50<|F3|/|F|<27.50. D is the maximum imaging circle diameter on the imaging surface, TTL is the distance from the center point to the imaging side of the object-side surface of the first lens, F is the total focal length of the camera lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, and F3 is the focal length of the third lens.

Abstract: A confocal scanning laser ophthalmoscope (cSLO) includes an illumination module, an acquisition module, a scanning element and an imaging lens group. With the scanning element at the nominal position and the illumination beam passing through the centers of the lenses, by controlling the deviation angle between the incident marginal rays and the reflected rays on each surface of the lenses in the illumination path to no less than 0.5 degree.

Abstract: The disclosure provides an optical lens system and a vehicle camera. From an object side to an imaging surface, the optical lens system sequentially includes 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 positive refractive power; a fifth lens having a negative refractive power, the fourth lens and the fifth lens constituting a cemented lens; a sixth lens having a positive refractive power; a seventh lens with a negative refractive power; a stop disposed between the first lens and the third lens. The lens of the present disclosure not only has thermal stability, but also has extremely high resolution for the objects that emit or reflect monochromatic lights of different wavelengths, so as to meet the requirements of the driverless vehicle system on the lens.

Abstract: A display system including an imager for forming an image, and a projection lens system for projecting the image formed by the imager is described. For each pixel in the plurality of pixels, the imager is configured to emit a cone of light having a central ray having a direction that varies with location of the pixel in the imager. The variation may increase a brightness of an image projected through the projection lens system by at least 30 percent. The display system may include a light guide having a light insertion portion adapted to receive light; a light transport portion disposed to receive light from the light insertion portion; and a light extraction portion disposed to receive light from the light transport portion.

Abstract: A vehicular interior rearview mirror assembly includes a mounting portion, a mirror casing and a mirror reflective element. The reflective element includes a glass substrate having a planar front surface, a planar rear surface and a circumferential perimeter edge around a periphery of the glass substrate that extends across a thickness dimension separating the planar front surface from the planar rear surface. A front perimeter edge portion of the circumferential perimeter edge includes a rounded glass surface circumferentially around the periphery of the glass substrate, with the rounded glass surface at least partially spanning the thickness dimension of the glass substrate. The rounded glass surface has a radius of curvature of at least 2.5 mm. The planar rear surface of the glass substrate is coated with a coating. No portion of the mirror casing overlaps onto the rounded glass surface of the glass substrate.

Abstract: Described are various embodiments of a light field testing device, adjusted pixel rendering method and computer-readable medium therefor, and testing system and method using same. In one embodiment, a light field device, system or computer-implemented method is provided to dynamically adjust user perception, via a light field display, of at least one testing optotype in accordance with a vision-based test, while also providing test administrative guidance via the light field display.

Abstract: A method for creating gradient optical properties within a substrate is disclosed herein. More specifically, the present invention teaches a method whereby a material disposed on a substrate is patterned in three dimensions such that the thickness and diffusivity properties of the material can be used to regulate the diffusion of ions into the substrate. An example is given in which ions, injected into a substrate through an ion exchange process, alter the refractive index within the substrate in a pre-selected fashion to form a gradient refractive index lens.

Abstract: The present invention relates to an electrochromic nanoparticle having a core-shell structure. The invention provides an electrochromic nanoparticle comprising: a core formed of a first electrochromic material; and a shell encompassing the core and formed of a second electrochromic material, wherein the first electrochromic material is formed of at least one type of transition metal oxide.

Abstract: Disclosed are curved electrochromic devices comprising an electrochromic apparatus disposed between first and second curved layers of transparent material, and the first and second curved layers have exterior and inner surfaces, wherein the inner surfaces face the electrochromic apparatus. Also disclosed are processes for manufacturing the disclosed bubble visors.

Abstract: A varifocal lens includes a first phase plate and a second phase plate which are rotatable relative to each other about an optical axis. The first phase plate includes a plurality of first phase conversion elements, the second phase plate includes a plurality of second phase conversion elements, and the plurality of first phase conversion elements and the plurality of second phase conversion elements are arranged so that light transmitted through the first phase plate and the second phase plate is focused on different positions on the optical axis depending on a relative rotational displacement between the first phase plate and the second phase plate.

Abstract: An automated luminaire includes an array of light sources and a beam shaper. The array of light sources produces a first light beam. The beam shaper receives the first light beam and produces a second light beam. The beam shaper includes an array of convex lenslets and an array of concave lenslets. The convex and concave lenslets have non-circular shapes when viewed along an optical axis of the first light beam. The convex lenslets nest into the concave lenslets. The convex and concave lenslets rotate about an axis of rotation that is parallel to the optical axis and is located in the first light beam.

Abstract: Systems and methods for Broad Line Fundus Imaging (BLFI), an imaging approach that is a hybrid between confocal and widefield imaging systems, are presented. These systems and methods are focused on improving the quality and signal of broad line fundus images or imaging methods to create high contrast and high resolution fundus images. Embodiments related to improved pupil splitting, artifact removal, reflex minimization, adaptable field of view, instrument alignment and illumination details are considered.

Abstract: A laser ablated product exhibits a diffraction severity of less than about 5. The product may include a substrate that is at least partially transparent to visible light, and a periodic structure formed on at least one surface of the substrate by laser ablation. The periodic structure has a period in at least one direction of at least about 4,500 nm to at most about 850,000 nm, and the periodic structure has a peak-to-valley dimension of less than about 25 nm. The product may be employed in an electrochromic device, such as a vehicle rearview mirror assembly.

Abstract: An ophthalmic technician is present with a patient in an exam room to operate eye examination equipment and transmit patient information to remote location. At that remote location, a skilled technician is present to provide the necessary optical care, and may operate the phoropter from the remote location. Using video and/or teleconferencing equipment and a phoropter located in the patient examination room along with management software, the system works to determine the final optical prescription for the patient. That information, coupled with findings from other devices which are integrated with the management software, and that the patient uses locally, are reviewed by a remote-based optometrist or ophthalmologist.

Abstract: Apparatuses, systems and methods for providing improved ophthalmic lenses, particularly intraocular lenses (IOLs), include features for reducing dysphotopsia effects, such as straylight, haloes and glare, in diffractive lenses. Exemplary ophthalmic lenses can include a diffractive profile that distributes light among a near focal length, a far focal length, and one or more intermediate focal length. The diffractive profile provides for minimized or zero step heights between one or more pairs of diffractive zones for reducing visual artifacts.

Abstract: An ophthalmological device according to the embodiments comprises an objective lens, a subjective inspection optical system, and an interference optical system. The subjective inspection optical system includes an optical element capable of correcting aberration of a subject's eye and projects a visual target onto the subject's eye via the objective lens and the optical element. The interference optical system splits light from a light source into reference light and measurement light, projects the measurement light onto the subject's eye via the objective lens and the optical element, generates interference light between returning light of the measurement light and the reference light, and detects the generated interference light.

Abstract: An image capturing optical system includes seven lens elements, the seven lens elements being, 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 and a seventh lens element. An image-side surface of the fifth lens element is convex in a paraxial region thereof. An image-side surface of the sixth lens element is concave in a paraxial region thereof. The seventh lens element has negative refractive power.