11results about How to "Reduce stray light interference" patented technology

The application provides a fiber-optic Fabry-Perot sensor based on light beam convergence and a manufacturing method thereof, and relates to the technical field of semiconductors. The sensor comprises a diaphragm layer, an intermediate layer and a bottom layer which are arranged in layers; the diaphragm layer is provided with a first groove, the intermediate layer is attached to the diaphragm layer in a manner that a first layer surface thereof faces the first groove, so as to form a Fabry-Perot cavity based on the first groove; the bottom layer is provided with a second groove, the intermediate layer is attached to the bottom layer in a manner that a second layer surface thereof faces the second groove, so as to form a nano-containing cavity based on the second groove; the second layer surface of the intermediate layer is formed with a micro-nano anti-reflection structure comprising array-distributed anti-reflection units located in the nano-containing cavity; and the bottom layer is formed with a micro-nano collimation structure comprising array-distributed collimation units located in the nano-containing cavity and in a symmetrical positional relationship with the micro-nano anti-reflection structure. The application at least reduces the manufacturing complexity.

The invention relates to a display panel and a display device, the display panel comprises a substrate and a plurality of repetitive units, the repetitive units are arranged on the substrate, each repetitive unit comprises a first sub-pixel, a second sub-pixel, a third sub-pixel and a photosensitive unit, in any repetitive unit, the first sub-pixel and the photosensitive unit are located in the same row, and the third sub-pixel and the photosensitive unit are located in the same row. The second sub-pixel and the third sub-pixel are located in the other adjacent row, and at least part of the photosensitive unit is adjacent to the third sub-pixel; the photosensitive unit is configured to be capable of receiving light emitted by the third sub-pixel and reflected by an object above the display panel. According to the display panel provided by the invention, the aperture ratio is improved, so that the photosensitive unit can conveniently receive light rays emitted by the third pixel and reflected by an object above the display panel, stray light interference on the photosensitive unit is reduced, and the use performance of the photosensitive unit is improved.

The application belongs to the field of portable lighting devices, and discloses a portable lighting device with a window breaking function. The movable connecting mechanism enables the light source module to switch between a first position and a second position relative to the shell. The piercing part is fixedly installed at the end of the shell and coaxially arranged with the shell when in the first position. The central axis of the shell and the central axis of the piercing part are arranged at an angle when the piercing part is in the second position. When the piercing part is in the second position, the light source module automatically deviates from the space in front of the glass when breaking the window, thereby reducing the scratches and impacts of the splashed debris on the light source module, prolonging the service life of the lighting component, and isolating and significantly reducing the stress borne by the battery compartment and the internal battery cell due to the non-collinear angle formed between the piercing part and the shell when the piercing part is in the second position.

The invention relates to the field of holographic display stands, in particular to a calling and complaint interactive holographic evidence display stand which comprises a display stand body, a glass cover, a fixing ring, a fixing cover and the like. A plurality of placing cavities are formed in the display stand; a glass cover is mounted on the display stand; a fixing ring is arranged in each placing cavity; each fixing ring is provided with a fixing cover, and the projectors are detachably connected with the fixing covers. And each fixing cover is provided with a plurality of air holes. According to the invention, stray light interference in ambient light is reduced through the optical filter, more accurate color restoration is ensured, and the consistency and authenticity of image colors are maintained especially under different ambient light, so that the image quality of the projector is improved, the display effect of the projector is optimized, and the viewing experience of audiences is improved; the distance between each optical filter and the lens of the projector is controlled through the positioning ring, so that the focusing function of the lens of the projector is prevented from being influenced by improper distance control.

This invention provides a vision system and device for detecting defects in optical convex lenses, comprising three sets of vision inspection modules. The first and third vision inspection modules are mirror-symmetrical, respectively detecting defects on the left and right edges of the sample. The first vision inspection module includes a first inspection camera and a first inspection light source; the second vision inspection module includes a second inspection camera and a second inspection light source; and the third vision inspection module includes a third inspection camera and a third inspection light source. The first, second, and third inspection cameras are located at the same height above the sample. The first and third inspection light sources are located diagonally above opposite sides of the sample, with the same vertical distance from the sample. The second inspection light source is located diagonally above the sample, with a greater vertical distance from the sample than the first inspection light source. By combining dual-station collaborative inspection with special reflective film optical path optimization technology, full coverage and high-precision detection of surface defects in optical convex lenses are achieved.

This application discloses an AR display module, an AR display device, and a vehicle, belonging to the field of vehicle-mounted equipment technology. The AR display module includes: a light-emitting unit, a display and imaging unit, an optical path coupling unit, and an optical waveguide unit; wherein, the optical path coupling unit includes a triangular prism and a mirror assembly; the triangular prism includes a first optical surface, a second optical surface, and a third optical surface connected end-to-end, the first optical surface facing the emitting end of the display and imaging unit, the second optical surface facing the incident end of the optical waveguide unit, and the third optical surface facing the reflecting surface of the mirror assembly; a first polarization beam-splitting film is formed on the second optical surface; a quarter-wave plate structure is integrated into the mirror assembly. By using the triangular prism and the mirror assembly to filter the polarization state and fold the optical path of the image light, the image light can be efficiently coupled into the waveguide at an angle that meets the requirements of optical waveguide transmission, while improving the system's light utilization and integration.

The present invention discloses a multi-sequence laser shadow imaging system and application method capable of reducing stray light interference, relates to the field of ultra-high-speed laser transmission, includes a multi-sequence light source module, a multi-light source space separation device, the multi-light source space separation device includes: an optical fiber output end armor matched with each high-energy threshold optical fiber at the output end of the multi-sequence light source subsystem, a homogenizer arranged downstream of the optical fiber output end armor, characterized in that it also includes: a constraint component I for reducing stray light interference, the constraint component I includes: a light-shielding bottom plate arranged close to the homogenizer, a plurality of small holes matched with the diameters of each high-energy threshold optical fiber are provided on the light-shielding bottom plate; and a plurality of conical parts corresponding to each small hole are arranged on the light-shielding bottom plate. The present invention discloses a multi-sequence laser shadow imaging system and application method capable of reducing stray light interference, which can effectively reduce the interference of stray light and correspondingly improve the quality of sequence imaging.

This invention discloses a broadband linear graded filter for spectral imaging, possessing high transmittance and excellent stray light suppression performance. The filter employs a multilayer thin-film structure, including an interference cutoff film system above a substrate and a narrowband filter film system below. The narrowband filter film system achieves high transmittance in the 500-800 nm wavelength range through an optimized design using multiple alternating combinations of high and low refractive index materials. The interference cutoff film system effectively suppresses stray light through its long-pass and short-pass design.

The invention discloses a photoelectric volume pulse wave detection system based on a vertical cavity surface emitting laser, which is characterized in that a multi-wavelength VCSEL (vertical cavity surface emitting laser) is used as a core light emitting unit and is matched with a signal processing module, an embedded control module and an AI (artificial intelligence) sign analysis module to construct an integrated detection framework. According to the system, stable lasing is realized by optimizing a VCSEL epitaxial structure and a preparation process; a multi-wavelength PPG signal is accurately acquired in cooperation with a low-noise amplification-multistage filtering-adjustable gain signal processing link; the embedded control module dynamically adjusts light source parameters, and the AI engine realizes real-time accurate calculation of health parameters through multi-dimensional feature extraction and integrated learning model and fusion of multi-wavelength signals. The system has the advantages of high integration level, low power consumption and strong anti-interference performance, the core unit is packaged compactly, the system adapts to the long endurance requirement of wearable equipment, the detection precision is obviously improved compared with the traditional LED equipment, and a high-cost-performance solution can be provided for the scenes of consumer electronic health management, primary medical screening and the like.

The invention provides an optical system for complex system imaging, which comprises an eyepiece, an aperture diaphragm, an aberration eliminating lens group, a front field lens group, a rear field lens group and a prism group, a semi-transparent and semi-reflective mirror is arranged in the rear field lens group, light of a light source is irradiated to pupils through the eyepiece, reflected light of the eye ground comes out from the pupils, and the prism group is arranged on the eyepiece. Light passes through the eyepiece, the aperture diaphragm, the aberration eliminating lens group, the front field lens group and the rear field lens group and reaches the semi-transparent and semi-reflecting mirror, 50% of the light passes through the semi-transparent and semi-reflecting mirror and enters the prism group for RGB imaging, the other 50% of the light is reflected by the semi-transparent and semi-reflecting mirror for white light imaging, the front field lens group comprises a transmission-type deformable mirror, and the rear field lens group comprises a transmission-type deformable mirror. The fundus, the focusing surface of the aberration eliminating lens group, the focusing surface of the front field lens group and the focusing surface of the prism group are mutually conjugated, and the pupil, the aperture diaphragm and the transmission type deformable lens are mutually conjugated. According to the invention, high precision, high stability and high light energy utilization rate of the system in a complex imaging scene are ensured, and a solution is provided for multi-band and high-resolution diagnosis of fundus diseases.

The invention discloses a visual system. The visual system comprises a first lens cone and a second lens cone which are sequentially arranged from a first side to a second side along an optical axis, and a first lens group and a second lens group which are respectively supported on the two lens cones, the first lens group sequentially comprises a first lens, a reflective polarizing element and a quarter-wave plate, and the second lens group sequentially comprises a second lens, a partial reflection element and a third lens; the focal power of the first lens and the second lens is positive, the surface types of the first lens and the third lens are convex and concave-convex respectively, and the second side surface of the second lens is a convex surface; the second lens and the third lens are glued; the second lens group can move along the optical axis to be close to or far away from the display on the second side, so that the system is switched between the first state and the second state; the visual system satisfies the following conditional expressions: 0.33 < = (fz / f23) * (La / Lb) < = 1.10 and 0.75 mmlt; (dbs / dam) * [delta] flt; and the thickness is 1.95 mm.