Abstract: An optical imaging lens system includes eight 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 and an eighth lens element. Each of the eight lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The eighth lens element has negative refractive power. The object-side surface of the eighth lens element is convex in a paraxial region thereof. The image-side surface of the eighth lens element is concave in a paraxial region thereof and has at least one critical point in an off-axis region thereof. A total number of lens elements in the optical imaging lens system is eight.

Abstract: The disclosure discloses an optical imaging system. The optical imaging system includes, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has a focal power, and an object side surface thereof is a convex surface; the second lens has a focal power; the third lens has a focal power, and an image side surface thereof is a convex surface; the fourth lens has a focal power, an object side surface thereof is a convex surface, and an image side surface thereof is a concave surface; the fifth lens has a positive focal power, and an object side surface thereof is a convex surface; and the sixth lens has a negative focal power, and an object side surface thereof is a concave face.

Abstract: An optical lens is provided. The optical lens includes a first lens element to a fifth lens element sequentially arranged from a light incident side to a light exit side. An image generation device is disposed at the light incident side, and the optical lens is configured to receive an image beam provided by the image generation device. The image beam forms a stop at the light exit side. The stop has a minimum cross-sectional area of beam shrinkage of the image beam. The optical lens provided by the invention exhibits good optical quality and thermal stability.

Abstract: An electrochromic device, system using, and method for, which may pre-activate a buffer is disclosed. The electrochromic device may comprise a first substrate, a second substrate, a first electrode, a second electrode, and an electrochromic medium. The second substrate may be disposed in apart relationship with the first substrate. The first and second electrodes may be associated with the first and second substrates, respectively. The electrochromic medium may be disposed between the first and second electrodes. Further, the electrochromic medium may comprise electrochromic materials and a redox buffer. Each of the electrochromic materials and the buffer may be operable between activated and deactivated states. The electrochromic device may be configured to apply a voltage to substantially pre-activate the buffer and hold the buffer in this state prior to substantially activating the electrochromic materials, thereby decreasing the response time of the electrochromic device upon activation.

Abstract: An optical imaging system includes six 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 and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has negative refractive power, and the object-side surface of the first lens element is concave in a paraxial region thereof. The image-side surface of the second lens element is concave in a paraxial region thereof. The fourth lens element has negative refractive power. The image-side surface of the sixth lens element is concave in a paraxial region thereof and has at least one critical point in an off-axis region thereof.

Abstract: A zoom lens ZL includes: a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, and a third lens unit L3 having a positive refractive power, an N?1th lens unit, and an Nth lens unit, the lens units being arranged in order from an object side to an image side. The N?1th lens unit and the Nth lens unit are located on the image side with respect to an aperture stop SP.

Abstract: A projection lens system is a projection lens system including a plurality of lens groups, the plurality of lens groups each including one or more lenses and moving such that an interval between the lens groups changes during a zooming action, the projection lens system including a first lens group disposed closest to a magnification side, the first lens group having positive power, wherein the first lens group includes one negative lens satisfying 0.0005<?pgfn<0.01 and 32<vdn<45.

Abstract: In an electrochromic element including a pair of electrodes and an electrochromic layer disposed between the pair of electrodes, a shape of a light modulating region viewed from a normal direction of the electrode being circular, when a sheet resistance of the electrode is rs (?), a resistance of the electrode is r (?), a diameter of the light modulating region is L [m], a distance between the pair of electrodes is d (m), the resistivity of the electrochromic layer is ? (?), and a resistance of the electrochromic layer is R (?), a resistance ratio (r/R) between the electrode and the electrochromic layer, as shown by r/R=(rsL2)/(?d), is 2 or more and 20 or less.

Abstract: An optical image capturing lens assembly includes five lens elements, the five lens elements being, 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 and a fifth lens element, each of the five lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The first lens element has negative refractive power. The second lens element has the image-side surface being concave in a paraxial region thereof. The third lens element with positive refractive power has the image-side surface being convex in a paraxial region thereof. The fifth lens element has the object-side surface being convex in a paraxial region thereof and the image-side surface being concave in a paraxial region thereof.

Abstract: An optical camera lens including a first lens, a second lens, and a third lens arranged in sequence from the object side to the image side. The first lens has a positive refractive power, and includes a first object side surface and a first image side surface opposite to the first object side surface. The second lens has a negative refractive power, and includes a second object side surface and a second image side surface opposite to the second object side surface, wherein the second image side surface is concave. The third lens has a positive refractive power, and includes a third object side surface and a third image side surface opposite to the third object side surface, wherein both the third object side surface and the third image side surface are convex. The optical camera lens satisfies the following condition: 2<(f+BFL)/OD1<7.

Abstract: Disclosed is a fundus camera, which relates to the technical field of medical devices and includes: an illumination module, a main optical assembly, a focusing module, and an image sensing acquisition module; the illumination module includes a plurality of light sources configured to emit light of different wavelengths, illumination light emitted by the plurality of light sources is conducted to enter an eye of a patient through the main optical assembly, and light reflected by a retina of the patient is conducted to pass through the main optical assembly and the focusing module to enter the image sensing acquisition module. The fundus camera provided by the present application improves the technical problem that the fundus camera in the prior art cannot image different layers of the retina, thereby providing valuable medical and diagnostic data.

Abstract: A protective shield for eyewear includes a body having opposite facing top and bottom major surfaces and a perimeter. The perimeter is defined by front, rear, and side regions. The rear region of the body is configured to have a concave surface to conform to the surface of a wearer's forehead. The bottom surface of the body includes one or more attachment members configured to permit the removable attachment of the body to eyewear.

Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power being formed in a meniscus shape having an object-side surface being convex in a paraxial region, a second lens with positive refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive refractive power in a paraxial region, a fifth lens having aspheric surfaces on both sides, and a sixth lens with negative refractive power having an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power being formed in a meniscus shape having an object-side surface being convex in a paraxial region, a second lens with positive refractive power in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens with positive refractive power in a paraxial region, a fifth lens having aspheric surfaces on both sides, and a sixth lens with negative refractive power having an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.

Abstract: An observation optical system includes, in order from a display panel side to an observation 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 an optical path brancher configured to branch an optical path, and disposed between a display panel and the first lens. An absolute value of a radius of curvature of a lens surface on the observation side of the first lens is smaller than that on the display panel side of the first lens. A predetermined condition is satisfied.

Abstract: The present disclosure discloses a camera lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having refractive power; a second lens having positive refractive power and a convex image-side surface; a third lens having negative refractive power, a convex object-side surface and a concave image-side surface; a fourth lens having negative refractive power; a fifth lens having refractive power and a convex image-side surface; and a sixth lens having refractive power, a convex object-side surface and a concave image-side surface. Half of a maximum field-of-view Semi-FOV of the camera lens assembly and a combined focal length f23 of the second lens and the third lens satisfy: 4.00 mm<tan2(Semi-FOV)*f23<10.00 mm.

Abstract: Optical systems may include MEMS mirrors having elliptical mirror plates. A laser scanning system may include a MEMS mirror that scans an incident light beam along a single scanning axis. The MEMS mirror may include an elliptical mirror plate having a semi-major axis that is aligned parallel or perpendicular to the rotational axis of the elliptical mirror plate. The incident light beam may have an elliptical cross-section, such that the incident light beam completely or substantially overlaps the reflecting surface of the elliptical mirror plate. After being reflected by the elliptical mirror plate, the light beam may be circularized via one or more shaping lenses disposed in the optical path of the reflected light beam, prior to projection of the light beam.

Abstract: The present invention relates to a prism module, a camera comprising same, and an image display device. A prism module, according to one embodiment of the present invention, comprises: a prism holder having a prism fixed to a first surface thereof; a yoke coupled to a second surface of the prism holder; a driving magnet seated on the yoke; a sensor magnet disposed on the yoke; a hall sensor disposed to be spaced apart from the sensor magnet; and a sensor magnet support member to which the sensor magnet is attached. Thereby, it is possible to precisely detect a magnetic field.

Abstract: A display device includes a frame that includes a front portion, temple portions, and a pad portion, and is mounted on head of an observer, and an image display device attached to the frame. The image display device includes an image forming device, and an optical device on which light emitted from the image forming device is incident and from which the light is emitted toward the observer. One end portion of the optical device is fixed to a temple portion side of the front portion. Other end portion of the optical device is on a pad portion side of the front portion. A light shielding member that prevents external light from being incident on the other end portion of the optical device from above the other end portion of the optical device is attached to the pad portion side of the front portion.

Abstract: Disclosed are an optical lens, a camera module and a terminal camera. From an object side to an image side, the optical lens include: a first lens with a negative focal power, which has a convex object side surface and a concave image side surface; a stop; a second lens with a positive focal power, which has a convex object side surface and a concave image side surface; a third lens with a positive focal power, which has a convex object side surface and a concave image side surface; a fourth lens with a positive focal power, which has a convex object side surface and a convex image side surface; a fifth lens with a negative focal power, an object side surface of the fifth lens is convex at a paraxial region and an image side surface of the fifth lens is concave at a paraxial region; and a filter.