13 results about "Entocentric lens" patented technology

The utility model discloses a kind of combination lens disc and stage lamp for multi-light source LED stage lamp, including lens fixed cover, lens assembly and lens mounting disc, the lens assembly is between lens fixed cover and lens mounting disc, the lens fixed cover is connected with the lens mounting disc;The lens assembly includes a center lens and the multiple peripheral lenses around the center lens periphery side, the size and shape of the peripheral lens are same;The inside of lens fixed cover and lens mounting disc is equipped with several partitions and mutually corresponding, several partitions are mutually connected and form hollow honeycomb structure;The one side of lens mounting disc towards lens fixed cover is equipped with several bosses, the peripheral lens is composed of multiple lenses, hollow lens break is equipped between the lens and lens, the position and size of the lens break are adapted to the boss, the peripheral lens is connected by the cooperation of lens break and the boss of lens mounting disc.

An optical imaging system includes a first bonded lens, a second bonded lens, and a third bonded lens sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane and spaced apart from each other by predetermined distances, wherein each of the first bonded lens, the second bonded lens, and the third bonded lens includes a central lens made of a plastic material or a glass material; a lens bonded to an object-side surface of the central lens, having a refractive power, and made of a material different from the material of which the central lens is made; and a lens bonded to an image-side surface of the central lens, having a refractive power, and made of a material different from the material of which the central lens is made.

The invention discloses a high-precision celestial body measurement method based on multi-channel imaging superposition detection, and belongs to the technical field of high-precision celestial body measurement, and the method comprises the steps: enabling a front-end large-aperture telescope to image an infinite target star and a reference star on a primary image plane; the lens array and the rear-end imaging objective lens are used for amplifying and imaging a target star image and a reference star image on a primary image surface; the target star image and the reference star image which are amplified and imaged by different imaging channels are superposed on the same final image plane and are recorded by the same monolithic array detector; according to the relative position distribution of a target star image and a reference star image on the monolithic array detector, assuming that all fixed stars are imaged by an imaging channel corresponding to a central lens unit of the lens array, and calculating the angular spacing between the target star and the reference star; and the change rule of the angular spacing between the target star and the reference star is obtained through multiple observations. According to the method, splicing of multiple focal plane detectors is not needed, and the technical problems of high splicing difficulty, complex calibration process and the like are solved.

The utility model discloses a mounting structure of a Fresnel lens of a search lamp, and belongs to the technical field of marine lighting. Comprising a lens mounting support, a Fresnel lens and a lens fixing piece, the lens mounting support is circular and comprises a central lens frame, a plurality of inner ring lens frames continuously distributed around the central lens frame and a plurality of outer ring lens frames continuously distributed around the plurality of inner ring lens frames; the Fresnel lens is matched with the central lens frame, the inner ring lens frames and the outer ring lens frames to form a central lens, a plurality of inner ring lenses and a plurality of outer ring lenses respectively, and a central lens mounting groove used for mounting the central lens is formed in the inner side of the top of the central lens frame. Inner ring lens mounting grooves used for mounting inner ring lenses are formed in the inner sides of the tops of the inner ring lens frames respectively, and the lens fixing piece is arranged above the Fresnel lens. The Fresnel lens fixing device has the advantages that the Fresnel lens can be directly positioned and fixed, the roundness of light source irradiation light spots is ensured, the production cost is saved, and the installation difficulty of the Fresnel lens is reduced.

This application discloses a projection lamp, including a housing, a light source, and a lens assembly. The housing has a light inlet and a light outlet on its front and back sides, respectively. An optical path channel is provided inside the housing. The light source is installed at the light inlet, and a light-transmitting plate is provided inside the light outlet. The lens assembly includes at least two upper lenses, one central lens, and at least one lower lens. The upper, central, and lower lenses are sequentially installed in the optical path channel from back to front. All three lenses are elliptical. This invention reduces the thickness of each lens by using elliptical lenses instead of the circular lenses used in the prior art, thereby effectively reducing the size of the projection lamp.

An image sensor includes a first quad phase detection (QPD) unit. The first QPD unit includes four photodiodes arranged in a matrix of two rows and two columns, a deep trench isolation structure including an outer wall surrounding the matrix of the photodiodes and an inner wall separating the photodiodes, a grid disposed on the deep trench isolation structure, a color filter disposed on the photodiodes and filled in the grid, and an optical component disposed on the color filter. The optical component includes a ring-type lens and a center lens surrounded by the ring-type lens, in which the ring-type lens has portions overlapping the outer wall of the deep trench isolation structure.

The utility model relates to the technical field of lenses, in particular to a split type lens which comprises an end lens part, a side lens part is arranged on the outer side of the end lens part, a cementing layer is arranged between the side lens part and the end lens part, a center lens part is arranged on the side face of the end lens part, and the center lens part is arranged on the side face of the end lens part. And the refractive index of the cementing layer is the same as that of the end lens part. According to the utility model, two independent injection molding devices are used for production, one injection molding device is used for injection molding of the end lens part, the other injection molding device is used for injection molding of the rest lens parts, and finally the end lens part and the rest lens parts are glued through the gluing layer. For some lenses with unsmooth edges, for example, the edge of the top lens part obviously protrudes outwards relative to the edge of the bottom lens part, and the thickness of the top lens part is large, compared with a lens integrally formed through injection molding, the split type lens is higher in production efficiency.

The utility model provides a Fresnel lens suitable for long-distance detection and an infrared detection device, and the Fresnel lens comprises a central lens which is provided with at least one lens unit and has a central axis, and two lens unit groups which are composed of a plurality of lens units and are disposed around the central lens. Wherein the focal length of the lens unit of the central lens is f, the distance between the optical center of the lens unit farthest from the central axis in the lens units of the lens unit group and the central axis is L, and the Fresnel lens is designed in a state that L is less than or equal to 18 mm, f is greater than or equal to 15 mm, and H is less than or equal to 10 mm to meet the condition that L / (f-H) is less than or equal to 0.7, wherein H is the height difference between the optical center of the lens unit of the central lens and the optical center of the lens unit farthest from the central axis in the lens units of the lens unit group in the direction of the central axis; therefore, the Fresnel lens can give consideration to the miniaturization design of the infrared detection device and the effective detection area in a long-distance detection application scene at the same time.

A display panel includes a driving backplane, a light-emitting layer, a lens layer, and a cover plate. The light-emitting layer is arranged on a side of the driving backplane and includes a plurality of light-emitting devices. The lens layer is arranged on a side of the light-emitting layer away from the driving backplane and includes a plurality of lens groups. One lens group is arranged corresponding to at least one light-emitting device. The lens group includes a central lens and a peripheral lens surrounding the central lens. The central lens and the peripheral lens include an inner light-transmissive area and an outer light-transmissive area surrounding the inner light-transmissive area. The refractive index of the inner light-transmissive area is greater than that of the outer light-transmissive area in the same lens group. The cover plate is arranged on a side of the lens layer away from the driving backplane.

The present disclosure relates to an optical imaging system including a first cemented lens, a second cemented lens, and a third cemented lens disposed in order from an object side of the optical imaging system toward an imaging plane along an optical axis of the optical imaging system and spaced apart from each other by a predetermined distance, each of the first cemented lens, the second cemented lens, and the third cemented lens includes: a center lens made of a plastic material or a glass material; a first side lens bonded to an object side surface of the center lens, having refractive power, and made of a material different from a material from which the center lens is manufactured; and a second side lens bonded to the image side surface of the center lens, having refractive power, and made of a material different from the material from which the center lens is manufactured.

An imaging unit according to an embodiment of the present invention is held by a distal end member of an endoscope, and comprises: a cylindrical lens barrel extending in an optical axis direction; an objective optical system formed from lenses held on an inner peripheral surface of the lens barrel; a holding member attached to the lens barrel and holding an imaging element; and a positioning member attached to the lens barrel. The positioning member has a first positioning part for determining a position in a circumferential direction around an optical axis of the holding member relative to the distal end member. One of the lens barrel and the positioning member has a second positioning part for determining a position in an optical axis direction of the lens barrel relative to the distal end member.

One embodiment of the present disclosure provides an image sensor including a first four-quadrant phase sensing (QPD) unit including four photodiodes, a deep trench isolation structure, a grating, a color filter, and an optical element. The photodiodes are arranged in an array of two columns and two rows. The deep trench isolation structure comprises an outer wall and an inner wall, the outer wall surrounds the photodiode, and the inner wall is arranged to separate the photodiode. The grid is disposed on the deep trench isolation structure. The color filter is arranged on the photodiode and is filled in the grating. The optical element is arranged on the color filter, the optical element comprises an annular lens and a central lens surrounded by the annular lens, a plurality of parts of the annular lens are overlapped on the outer wall of the deep groove isolation structure, the optical element can provide more than one focus on the photodiode, and then the L / R balance of the QPD unit is improved.