31results about How to "Strong light transmission ability" patented technology

The invention discloses a method for forming a three-dimensional micro spiral channel inside quartz glass by using femto-second laser. The method comprises the following steps of: focusing femto-second laser beams onto the lower surface of the quartz glass, fixing the quartz glass on a three-dimensional precision workbench, and scanning a needed micro spiral locus profile from bottom to top inside the quartz glass by using the focal point of the femto-second laser beams; and soaking a scanned quartz glass substrate into a hydrofluoric acid solution, and corroding regions which are treated by femto-second laser till a micro spiral channel which is penetrated up and down is formed. The method disclosed by the invention has the advantages of simple process and low cost.

The invention relates to an optimal lens. The optical lens sequentially comprises a front lens group, a diaphragm element and a rear lens group from an object space to an image space, wherein the front lens group has positive focal power; the rear lens group has positive focal power; the front lens group sequentially comprises a crescent first lens and a double-convex second lens from the object space to the image space; the crescent first lens has negative focal power; a concave surface of the crescent first lens faces the image space; the double-convex second lens has positive focal power; the rear lens group sequentially comprises a double-concave third lens, a crescent fourth lens and a balsaming lens; the double-concave third lens has negative focal power; the crescent fourth lens has positive focal power; a concave surface of the crescent fourth lens faces the object space; the balsaming lens consists of a fifth lens and the sixth lens. The requirements of high pixel, small distortion, large aperture, high light transmitting performance and accordance with high definition are met under the conditions of low cost and small miniaturization are realized; various aberrations of an optical system are effectively corrected; meanwhile, perfect imaging definition can be kept in the temperature of -40DEGC to 85DEG C; the optical lens is specially suitable for monitoring or vehicle-mounted camera systems considering daytime and nighttime or poor illuminating conditions.

The invention provides a wide-angle camera lens with an aspherical cemented lens. The wide-angle camera lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence from an object space to an image space, wherein the first lens, the second lens and the fourth lens have negative focal power, the third lens and the fifth lens have positive focal power, the fourth lens and the fifth lens are adhered together to form a cemented lens with the positive focal power, an adjoining plane of the cemented lens is at least a quadratic or above aspherical surface, the condition that BFL (Back Focal Length)/EFL (Effective Focal Length) is not smaller than 3.0 is also satisfied, BFL is a distance from an outermost point at the image space of a fifth lens element ofthe wide angle camera lens to an imaging plane, and EFL is a focal length value of the wide angle camera lens. The wide-angle camera lens can be used for realizing characteristics of a wide angle, small distortion, a large relative aperture, an ultra-long TTL (Total Length of Lens) and BFL under the condition of lower cost, and ensuring a comparatively perfect imaging definition within a wider temperature range, and is particularly suitable for outdoor monitoring under a relatively hostile environment and a vehicle-mounted camera system.

The invention discloses a medium-expansion optical fiber image transmission element and a preparation method thereof, and the preparation method comprises the steps: (1) enabling a core material glass rod and a skin material glass tube to be matched for monofilament drawing, and enabling the diameter of a monofilament to be 3.12 +/-0.02 mm; (2) arranging the drawn monofilaments into a primary composite rod, and drawing the primary composite rod into a hexagonal primary multifilament with the opposite side size of 1.200 +/-0.025 mm; (3) arranging the drawn primary multifilaments into a secondary composite rod, and drawing the secondary composite rod into a hexagonal secondary multifilament with the opposite side size of 1.110 +/-0.025 mm; (4) cutting and truncating the drawn secondary multifilaments, arranging the cut secondary multifilaments into row plate sections, putting the row plate sections into a mold, and performing hot melt pressing molding to obtain medium-expansion optical fiber image transmission element blank plate sections; and (5) performing rounding, cutting, end face grinding and polishing and the like on the prepared medium-expansion optical fiber image transmission element blank plate sections to prepare a blank, and performing heating torsion forming or stretching forming on the blank to obtain a medium-expansion optical fiber image inverter or a medium-expansion optical fiber light cone. The medium-expansion optical fiber image transmission element can be applied to a low-light-level image intensifier.

The invention discloses a projector which comprises a lighting unit and a lens unit, wherein the lighting unit comprises a first white light source, a second white light source, a reflecting mirror and a light bar, and the center lines of emergent light of the first white light source and the second white light source are mutually vertical; the in-light surface of the light bar faces to the first white light source, the light bar is arranged on an output light path of the first white light source, and an axis of the light bar is parallel to the center line of the emergent light of the first white light source; the reflecting mirror is arranged on an output light path of the second white light source and used for reflecting the emergent light of the second white light source to the in-light surface of the light bar; the lens unit comprises a collimating mirror, concave and convex lenses, a biconvex lens and a biconcave lens, which are coaxially and arranged along the center line of the emergent light of the light bar. The projector can improve the light passing capacity and improve the projection brightness.

A multi-channel push-pull type plug comprises a plurality of plug insertion pieces, each plug insertion piece is provided with at least one insertion pin through hole, insertion pins are arranged in the insertion pin through holes, one end of each plug insertion piece is installed in a containing shell, and a wire extends into the containing shell from the other side of the containing shell and is connected with the insertion pins. According to the multi-channel plug provided by the utility model, the plurality of plug inserts are arranged to form a whole with a reasonable and compact structure, and the plurality of plug inserts can ensure the relative positions of the plurality of pins, so that the plurality of pins can be accurately inserted into the socket at the same time, the condition that individual pins deviate in the socket is prevented, the plugging accuracy of the multi-channel plug is ensured, and the light transmission performance of the product is improved.

The invention discloses an optical biological fingerprint identification structure. The system comprises an optical lens, and a CMOS image sensor and an image processing and recognition algorithm module which are located below the optical lens. The optical lens comprises a first lens, the first lens comprises a first lens body, the edge position of the optical biological fingerprint identificationstructure is sequentially provided with a first zone, a second zone... An nth zone from inside to outside, and n is a natural number greater than 0. The method has the advantages of increasing the light flux of an edge area, improving the relative illuminance of image edges and improving the biological recognition accuracy.