177 results about "Luminous flux" patented technology

The invention provides an intelligent control method for a floodlight illumination system, and the method comprises the steps: obtaining an environment surface roughness coefficient, spectral reflection distribution and spatial geometric change data, determining the wall surface material absorptivity and shielding region coordinates, and obtaining environment reflection characteristics and shielding distribution data; analyzing shielding boundary sharpness and shielding angle distribution according to the spatial geometric change and the coordinates of the shielding area, calculating a luminous flux distribution curve of a local dark area, and judging whether the influence range of the dark area exceeds a preset threshold range or not; calculating the illumination coverage integrity according to the updated light field distribution and polarization reflection characteristics, determining the boundary sharpness of a light beam, and obtaining a light field uniformity parameter; and according to the light field uniformity parameter and the shielding thermal radiation effect, calculating and optimizing light field parameters.

The invention relates to the technical field of image data processing, and discloses a method for detecting impurities in metal powder based on image recognition, which comprises the following steps of: irradiating the metal powder by using polarized light, synchronously acquiring an orthogonal polarization component image of the reflected light, and realizing impurity detection by calculating a differential image. Qualified powder spontaneously forms a uniform dark field in a differential image by utilizing the essential difference of response of metal powder and impurities to polarized light, and the impurities generate remarkable signals due to optical anisotropy, so that the detection blind area of the traditional method on the microscopic impurities is broken through, the method further performs time sequence analysis by multiplexing total luminous flux data, and the detection accuracy is improved. Synchronous identification of impurity morphological characteristics is realized, component and morphological two-dimensional detection capability is formed, the system realizes adaptive threshold adjustment based on statistical characteristics of differential images, and long-term operation stability is ensured.

A light emitting device includes a planar array of individually addressable first light sources configured to emit visible light into a plurality of angular bins toward an environment, one or more second light sources configured to emit ultraviolet light, an imager positioned to receive light reflected from the environment, a processor configured to analyze one or more images captured from the imager and identify a shadow region in the environment, wherein one or more light sources of the plurality of individually addressable first light sources is directed to increase a light flux output in one or more angular bins of the plurality of angular bins corresponding to the shadow region. The one or more second light sources and may be individually addressable and positioned in a planar array on a substrate.

The invention relates to a three-waveband medium-long wave infrared optical filter and a preparation method, the three-waveband medium-long wave infrared optical filter comprises a front film system, a substrate and a back film system, and the substrate is located between the front film system and the back film system; the front film system is formed by alternately overlapping germanium layers and zinc selenide film layers; and the back film system is formed by alternately overlapping germanium layers and zinc selenide film layers. According to the invention, the light energy of three wave bands of 3780-4000 nm, 4500-4900 nm and 7850-9500 nm is improved, the luminous flux of other wave bands is well inhibited, the technical problem of infrared filtering windows in some special infrared spectrum detection systems is solved, and a new scheme is provided for the application of the infrared spectrum detection systems.

The invention belongs to the technical field of glossiness detection, and particularly relates to a method for rapidly and nondestructively detecting the fruit surface glossiness of cattle and sheep-horn peppers, which comprises the following steps: S1, recording the reflected luminous flux of a glossiness plate by adopting the glossiness plate; s2, selecting a measurement site according to the surface type of the to-be-measured sample, measuring the site by using a glossmeter, and recording the reflection luminous flux of the measurement site; s3, calculating the glossiness of the measurement site; s4, correcting the glossiness of the measurement site to obtain the glossiness of the sample to be measured; and S5, correcting the glossiness according to the data correction model, and dividing the glossiness grade of the sample to be detected. The detection method disclosed by the invention is high in repeatability and high in precision, can realize rapid and nondestructive detection of a single fruit, and has a relatively good application prospect.

The invention relates to the field of electrical engineering, and discloses a high-luminous-efficiency LED street lamp based on multi-chip combination and a luminous flux improving method thereof, and the method comprises the steps: obtaining photoelectric parameter data, carrying out the classification modeling of chips, and constructing a light source feature database; self-adaptive parameter extraction is carried out on the light source feature database, a cooperative work model is constructed, the chip load state is adjusted through a current sharing control strategy, and the chip heat distribution change condition is monitored in real time; whether the working state is stable or not is judged based on the heat distribution change condition, and if the working state is stable, stage change data of luminous flux output is recorded, and a chip driving strategy is corrected; according to the corrected chip driving strategy, spatial distribution regulation and control and energy efficiency optimization are carried out on output luminous flux, regulation factors are extracted, a light emitting path and heat dissipation intensity are adjusted, and luminous efficiency balance improvement is carried out; and evaluating the luminous flux output effect based on the luminous efficiency balance improvement result, and generating a working state evaluation report and a luminous flux improvement suggestion.

The invention provides an LED street lamp brightness adaptive adjustment method and system, and the method comprises the steps: collecting light intensity time sequence data in a target region, the position-speed associated data of a road surface moving target, and power supply frequency fluctuation data through a Mesh network, so as to create a corresponding fusion data set; transmitting the fusion data set to an edge computing node of the LED street lamp to perform dynamic scene clustering and divide a plurality of target use scenes, and synchronously outputting an initial brightness adjustment parameter matched with each target use scene; historical operation data of the LED street lamp is called, a corresponding brightness attenuation prediction model is constructed, and the brightness attenuation amount in the future preset time is predicted according to the current operation duration and the environment temperature data; and performing pre-compensation correction processing on the initial brightness adjustment parameter according to the brightness attenuation so as to output a corresponding target brightness control parameter, and correspondingly controlling the output luminous flux of the LED street lamp according to the target brightness control parameter. The energy-saving benefit of the street lamp can be effectively improved.

The invention relates to a dual-waveband medium-long wave infrared optical filter based on a germanium / zinc sulfide asymmetric film system and a preparation method of the dual-waveband medium-long wave infrared optical filter. The dual-waveband medium-long wave infrared optical filter comprises a front film system, a substrate and a back film system, the front film system and the back film system are formed by alternately overlapping germanium layers and zinc sulfide film layers; the average transmittance of the infrared optical filter in the wave band of 3800 nm to 4800 nm and the wave band of 8000 nm to 10000 nm is not lower than 91%. According to the two-waveband medium-long wave infrared optical filter disclosed by the invention, 3800 to 4800 nm amp is realized; according to the infrared filtering window, the light energy of medium waves and long waves of 8000-10000 nm is improved, the luminous flux of other wavebands is well inhibited, the technical problem of the infrared filtering window in some special infrared spectrum detection systems is solved, and a new scheme is provided for infrared application.

The invention provides europium-doped silicate green fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of luminescent materials. The green fluorescent powder can generate narrow-spectrum green light with the peak value located at 532 nm under excitation of 450 nm blue light, the full width at half maximum is 46 nm, a white light LED device prepared based on the fluorescent powder has a 110% NTSC color gamut, and it is indicated that the green fluorescent powder has excellent application value in backlight display. The saturation threshold value of the fluorescent powder reaches 21.6 W / mm < 2 > under the excitation of 450nm blue laser, and the lumen at the moment reaches 1157.9 lm. The green fluorescent powder disclosed by the invention has the advantages of high luminous efficiency, narrow full width at half maximum, high light saturation threshold under blue laser excitation, high lumen efficiency and the like, and has application feasibility in the aspect of laser display.

The full-color Micro-LED micro display chip comprises a driving substrate, the driving substrate is electrically connected with blue sub-pixels and blue excitation pixels which are located on the same layer height, the blue excitation pixels are integrally arranged at the positions of the two sub-pixels, red light color conversion pieces downwards wrapping the side walls of the blue excitation pixels are coupled to the upper portions of the blue excitation pixels, and red light color conversion pieces downwards wrapping the side walls of the blue excitation pixels are coupled to the lower portions of the red light color conversion pieces. The driving substrate is also electrically connected with a green sub-pixel which is located at the same layer height as the red light color conversion piece; and the blue sub-pixel and the green sub-pixel are respectively provided with a light filtering layer with a pit at the top end. The light-emitting area of the blue excitation pixel is effectively increased, meanwhile, the coupling technology is enhanced to enable the red light color conversion piece to wrap the side wall of the blue excitation pixel, the luminous flux of the blue excitation pixel entering the red light color conversion piece is further increased, the luminous flux of the blue sub-pixel and the green sub-pixel can be regulated and controlled through selective opening of the light filtering layer, and the luminous efficiency of the blue sub-pixel and the green sub-pixel is improved. Therefore, the full-color display white balance is effectively controlled.

The invention provides a training method of a spectrum matching model, and a spectrum matching method, device and equipment. The training method comprises the following steps: acquiring a training sample; inputting the training sample into a feature extraction network of an initial deep learning model for feature extraction to obtain spectral features; inputting the spectral features into a full connection layer of an initial deep learning model for lamp bead prediction to obtain a prediction probability that each type of lamp bead is selected; determining a candidate lamp bead set according to the prediction probability; inputting the candidate lamp bead set into a combination optimization network for lamp bead combination to obtain a target lamp bead combination simultaneously matched with at least one target spectrum and a luminous flux ratio of the target lamp bead combination corresponding to each target spectrum; calculating a loss value based on the test spectrum under the luminous flux ratio of the target lamp bead combination and the corresponding target spectrum; and by taking minimization of the loss value as an optimization target, adjusting network parameters of the initial deep learning model to obtain a trained spectrum matching model. According to the scheme, efficient and accurate spectrum matching is realized.

The invention relates to the field of composite materials, and discloses a light-operated LED filament lamp driving system and a light-operated LED filament lamp, and the light-operated LED filament lamp driving system comprises the following modules: a spectrum sampling module which is used for collecting light intensity data of a plurality of wavelengths in ambient light; the luminous flux calculation module is connected with the spectrum sampling module and is used for calculating real-time environment luminous flux based on the light intensity data and a sensor response function; and the error optimization module is connected with the luminous flux calculation module and is used for calculating a luminous flux error by comparing the real-time environment luminous flux with the target luminous flux and optimizing a dynamic light control threshold according to the error. According to the technical scheme of combining multispectral integral calculation, dynamic threshold adjustment and constant-current driving with PWM dimming, high-precision light detection in a complex light environment, rapid adaptation to dynamic light changes, stable driving of a filament lamp and non-stroboscopic dimming are achieved, meanwhile, false triggering caused by short-time light fluctuation is effectively restrained, and the light-emitting efficiency of the filament lamp is improved. The reliability and the service life of the system are improved.

The invention relates to the technical field of solid crystal glue materials, in particular to a reflective solid crystal glue material based on a nanoparticle dispersion technology, a preparation process and application. The coating comprises a resin matrix, a nanometer functional filler and an auxiliary agent system, wherein the resin matrix at least comprises epoxy resin, cyanate ester resin and benzoxazine resin; the nano functional filler is one of a nano particle material or a nano filler; through the synergistic effect of the surface-modified zinc oxide nanoparticles and the surface-modified cerium oxide nanoparticles and in combination with the total reflection characteristic of the titanium dioxide coated glass beads, an efficient reflection-refraction synergistic enhancement system is constructed; the plasma resonance effect of the surface-modified cerium oxide nanoparticles is matched with the high-refractive-index zinc oxide nanoparticles, so that the initial luminous flux of an LED is improved by 18%-22% compared with that of traditional solid crystal glue, the light utilization rate is improved by 20%-25%, the six-surface luminous potential of a chip is excavated, and therefore the quality of the solid crystal glue is improved.

To provide a light-emitting device which has less reduction in total luminous flux due to narrowing of an angle and is easily manufactured.SOLUTION: A light-emitting portion that is disposed on the substrate, includes a light-emitting layer, and emits light from the light-emitting layer as emitted light from an upper surface located on a side opposite to the substrate; An optical function portion including a pedestal portion disposed above a light emission surface of the light-emitting portion and spaced apart from an upper surface of the light-emitting portion, the pedestal portion including a plate-shaped portion extending to cover the light emission surface of the light-emitting portion in a top view, and a plurality of projections formed on the upper surface of the pedestal portion; A low refractive index portion made of a low refractive index substance having a refractive index lower than that of the optical function portion, wherein each of the plurality of convex portions is a pyramid or a truncated pyramid whose bottom surface is disposed on the upper surface of the pedestal portion.SELECTED DRAWING: Figure 2

The utility model relates to a medical endoscope cold light source illumination uniformity testing device, which comprises luminous flux testing equipment, a medical endoscope cold light source, a supporting clamp, a positioning clamp, a standard single optical fiber, a luminous flux sensor and a computer, the standard single optical fiber is inserted in a light outlet hole of the medical endoscope cold light source, a supporting clamp and a positioning clamp are sequentially installed on the standard single optical fiber, the tail end of the standard single optical fiber is connected with a luminous flux sensor, the luminous flux sensor transmits measured luminous flux to luminous flux testing equipment through a signal line, and the luminous flux testing equipment is connected with a computer through a USB-to-232 line. And displaying the test operation and the analysis result at the computer end. The device has the advantages of simple and reasonable structure, convenience in installation and use and the like.

To provide a lighting device capable of faithfully reproducing a color of an irradiated object.SOLUTION: The lighting system A1 is provided with two kinds of LED10, 20 and a lighting device 2. The two types of LED10 20, 20 include a first 1LED10 and a second 1LED10 that emits light having a higher color gamut area ratio than the first 2LED20. The lighting device 2 individually dims the 1LED10 and the 2LED20 so that the ratio of the light flux of the 1LED10 to the total light flux becomes large when the total light flux of the 1LED10 and the 2LED20 is larger than the thresholds. The lighting device 2 individually dims the first 2LED20 and the second 1LED10 so as to increase the ratio of the light flux of the first 2LED20 to the total light flux. The lighting device 2 individually dims the 1LED10 and the 2LED20 so that the ratio of the light flux of the 1LED10 and the ratio of the light flux of the 2LED20 are the same.SELECTED DRAWING: Figure 1

The invention discloses a quantitative detection method for anti-perspective performance of a textile in a complex light environment, and belongs to the technical field of new material detection, a micro gap is arranged between the textile to be detected and a variable-frequency gray scale target to simulate a non-clinging state when clothes are worn and excite Fresnel diffraction and subsurface scattering effects, and the anti-perspective performance of the textile is detected. Complex illumination conditions such as backlight and sidelight are simulated by adjusting the light intensity ratio, and after a target perspective image is acquired by using an image acquisition unit, the modulation transfer function attenuation rate of a to-be-detected textile to the target is calculated, so that the anti-perspective performance of the textile is quantitatively represented; the interference of glare on the surface of the high-gloss fabric is effectively eliminated by introducing an orthogonal polarization modulation technology, and a detection result is highly consistent with the visual perception of human eyes by adopting a specific light source spectrum simulating the skin color of a human body; compared with a traditional light transmittance method, the method has the advantages that the dimension crossing from luminous flux measurement to image information fidelity evaluation is realized, and the accuracy, reliability and practicability of detection are remarkably improved.

The invention provides a light-emitting device which is bright in both scotopic vision and photopic vision and reduces dazzling to people. The light-emitting device includes a light-emitting element having a dominant wavelength in the range of 430 nm to 500 nm, and a phosphor excited by light from the light-emitting element and having an emission peak wavelength in the range of 507 nm to 660 nm, and emits light having a dominant wavelength in the range of 490 nm to 500 nm. The S / P ratio, which is the ratio of the luminous flux in scotopic vision to the luminous flux in photopic vision, is 6.5 or less, and the luminous intensity at the luminous peak wavelength of the light-emitting element is higher than the luminous intensity at the luminous peak wavelength of the phosphor.

An apparatus and a method for detecting a mounting state of a light pipe in a terminal are disclosed. The detection apparatus includes a fixture, a detection light source, and a light detection module. A light inlet path is formed inside the fixture, an opening that is of the light inlet path and that is exposed to the fixture is opposite to a mounting position of the light pipe, and the detection light source is disposed above the fixture. The light detection module is configured to determine the mounting state of the light pipe based on a luminous flux value of detection light. In cases in which the light pipe is properly mounted, the mounting position is deviated, the light pipe is not mounted, or the like, the luminous flux value of the detection light that is transmitted to the light detection module through the light inlet path varies accordingly.

The invention relates to a three-mirror anastigmat telescope, comprising at least a primary mirror (1), a secondary mirror (2) positioned in front of the primary mirror (1) such that the primary and secondary mirrors have optical surfaces (1.1, 2.1) opposite one another, a tertiary mirror (3) having an optical surface (3.1) opposite the optical surface (2.1) of the secondary mirror (2), and a first optronic sensor (10) positioned opposite the tertiary mirror (3). The telescope comprises a second optronic sensor (20) positioned behind the secondary mirror (2) and the optical surface of the secondary mirror (2.1) has a dichroic treatment (2') intended to separate an incident luminous flux reflected by the primary mirror (1) into a first luminous flux reflected towards the first optronic sensor (10) via the tertiary mirror (3) and a second luminous flux transmitted to the second optronic sensor (20), the first luminous flux and the second luminous flux being in different spectral bands and the secondary mirror (2) being transparent to the spectral band of the second luminous flux.

A light emitting apparatus includes a substrate and at least one light emitting device disposed on the substrate and configured to emit light, wherein a luminous flux in a blue wavelength region is in the range of 0.01 times to 0.1 times the total luminous flux, and the light emitted from the light emitting device may have a peak wavelength with a first radiant intensity in the blue wavelength region and a peak wavelength with a second radiant intensity in a green wavelength region, which is less than the first radiant intensity, wherein the first radiant intensity may be greater than or equal to 4 times the second radiant intensity.

The utility model discloses an LED paster lamp bead used for irradiation and a light treatment device thereof, comprising a substrate, a luminescent lamp string and an electrode layer, and LED chips comprise a red light LED chip used for emitting red light and an infrared light LED chip used for emitting infrared light. According to the utility model, the luminous flux and peak values of the red light and the infrared light are reasonably proportioned, so that the mixed light finally emitted by the lamp beads can realize good anti-inflammation and pain-relieving effects on the inflammation generation part, and meanwhile, the vasodilatation and the blood circulation can be effectively promoted; a good auxiliary treatment effect is achieved on diseases such as prostatitis which occur in the body surface and urgently need to improve the blood flow characteristic, so that the treatment of the diseases through the light therapy is feasible; and meanwhile, the treatment range and the universality of the current phototherapy equipment are also expanded.

The application belongs to the technical field of automobile lighting and electric heating control, and discloses an intelligent thermal management and light efficiency cooperative control system of an automobile LED lamp module. The system comprises a microcontroller, in which a physical thermal model based on a thermal resistance network and a light efficiency-junction temperature mapping function are established. The ambient temperature, the vehicle speed signal and the driving current are taken as the input of the physical thermal model, the predicted junction temperature of the next control period is solved, and the predicted luminous flux decay amount is obtained by substituting the predicted junction temperature into the mapping function. When the predicted luminous flux decay amount exceeds the light efficiency maintenance threshold, the microcontroller dynamically generates a frequency reduction pulse width modulation driving signal according to the light efficiency priority weight before the junction temperature reaches the hardware safety limit, synchronously outputs a water pump speed regulating signal, and forms a front cooperative control link. The system eliminates the control lag caused by the thermal conduction delay of the temperature sensor, avoids the local thermal runaway of the chip, maintains the constant luminous flux output, and reduces the invalid start-stop frequency of the heat dissipation actuator.

The application relates to the field of LED health lighting, and discloses a method for LED mixed generation of sunlight-like white light and an LED lamp set. The method comprises the following steps: determining the color points of each LED lamp bead around a blackbody radiation line, independently packaging each LED lamp bead, and comprising LED chips with specific peak wavelengths and various fluorescent powders; determining l target sunlight-like white light color points on the blackbody radiation line, and calculating l groups of luminous flux parameters; selecting a group of luminous flux parameters from the l groups of luminous flux parameters according to a preset target, and using the group of luminous flux parameters to control the m LED lamp beads to form mixed light, i.e. sunlight-like white light. According to the combination of different intensities of various light sources, the application changes the single waveband excitation of fluorescent powder for emitting white light by the existing full-spectrum white light LED into multi-waveband LED chip mixed dimming, fills the gap of the spectrum of about 480 nm, has a higher color rendering index, and has a more continuous mixed spectrum, and can realize sunlight-like dimming along the blackbody radiation line.

The utility model provides a spectrum chip and an electronic device, the spectrum chip comprises a light splitting unit and a plurality of light sensing units, the light splitting unit is provided with a light incident side and a light emergent side which are oppositely arranged, the plurality of light sensing units are arranged on the light emergent side of the light splitting unit, each light sensing unit is provided with a light sensing area which is oppositely arranged with the light splitting unit, the plurality of light sensing areas have different areas, so that the light splitting unit is suitable for respectively providing light signals with different luminous fluxes for the plurality of light sensing units under the condition that the light intensity of the light incident side is the same, and the light signals are converted into electric signals by the corresponding light sensing units. By setting the photosensitive areas with different areas, the plurality of photosensitive units can obtain luminous fluxes with different sizes, and the system can select the most suitable image corresponding to the photosensitive unit according to the actual illumination condition, thereby effectively reducing the overexposure or too dark condition, and improving the imaging quality problem when the illumination environment changes drastically.

The invention discloses a vehicle lamp light distribution method, device and equipment, a storage medium and a product, and relates to the technical field of vehicle lamp light distribution. The light distribution grids are divided in the virtual light distribution area of the vehicle lamp, and the corresponding luminous flux is determined for each light distribution grid according to the solid angle of the light distribution grid and the corresponding light distribution required value, so that the minimum luminous flux required in each angle range under the condition that the light distribution required value is met is obtained; based on the luminous quantity of each light-emitting unit, the light transmittance of the light-transmitting component of the vehicle lamp and the luminous flux sum of the light distribution grids, the minimum adopted quantity of the light-emitting units can be directly calculated, so that a reference is provided for subsequent light distribution design, the cost of the vehicle lamp can be reduced on the basis that the subsequent light distribution design can meet the specified light distribution requirement, and the vehicle lamp quality is improved. Therefore, efficient car lamp light distribution is achieved.

The application relates to the technical field of LED lamp bead detection, and discloses an LED lamp bead light decay prediction method and system, which comprises the following steps: collecting the luminous flux, junction temperature and forward voltage of an LED lamp bead to obtain LED operation parameter data; performing first-order derivative and second-order derivative calculation on the LED operation parameter data to obtain parameter change rate data; performing composite threshold value detection on luminous flux drop events, temperature jump events and thermal resistance mutation events based on the parameter change rate data to obtain light decay event detection results; and generating lamp bead identification results including a thermal attenuation mode, an electromigration attenuation mode or a photochemical attenuation mode according to the light decay event detection results, in combination with carrier injection efficiency values, fluorescent powder quantum efficiency values and chip defect density values, the application drives physical parameter calculation and mode identification based on event detection results, realizes a technical transformation from passive response to active identification, and significantly improves the real-time performance and accuracy of LED light decay prediction.

The invention provides an intelligent induction dimming and color modulation method. The method comprises the following steps: 1, setting a scene mode; 2, light flux change is selected to be defined along with an illumination sensor or self-defined, and color temperature mode selection is changed along with time or self-defined; (3) if the automatic dimming mode is selected, the photosensitive sensor detects the environment brightness change and transmits the environment brightness change to the processor, the processor sends a signal to the dimming and color adjusting module in real time according to the selected brightness value, and then the brightness of the lamp is automatically adjusted; (2) if automatic color temperature adjustment is selected, the processor sends a signal to the dimming and color adjusting module and then the lamp along with the time change through combination of a photosensitive sensor signal and a time signal, so that the color temperature is changed along with the time change, and the color temperature change of sunlight in one day is simulated; and (3) if the fixed color temperature luminous flux is selected, the processor only sends a fixed signal to the dimming and color adjusting module, and the lamp only has the fixed color temperature and luminous flux.

A biological fluid information acquisition apparatus includes a light source, a prism, a first light receiving element, a second light receiving element, a differential circuit, and a signal processing unit. The prism has a first boundary face that branches a laser beam emitted from the light source into a first luminous flux and a second luminous flux, a second boundary face that totally reflects the second luminous flux, a third boundary face that totally reflects the second luminous flux reflected by the second boundary face, and a fourth boundary face emitting the second luminous flux reflected by the third boundary face, and, when a width direction of the biological fluid information acquisition apparatus is an X direction and a thickness direction of the biological fluid information acquisition apparatus orthogonal to the X direction is a Y direction, an interval between the second boundary face and the third boundary face in the Y direction is shorter than an interval between the first boundary face and the fourth boundary face in the X direction.

The invention discloses a glass slit and a preparation method thereof. The glass slit is divided into a light-transmitting area (2) and a light-proof area (1). The width of the light-transmitting area (2) is 15 or 30, the light-transmitting area (2) is plated with an antireflection film, and the transmittance is greater than 96%; the light-proof area (1) is plated with an absorption film, and the absorption rate is larger than 96%. The preparation method of the glass slit relates to substrate processing, gluing, film coating, stripping and the like. The transmittance of the glass slit light-transmitting area (2) is larger than 96%, the luminous flux of an optical system is guaranteed, the light-proof area (1) adopts an absorption film, and stray light introduced by multiple times of reflection of an optical lens in traditional chromium plating is avoided; according to the preparation method, the phenomena of large size errors and slit burrs in traditional laser cutting are avoided, the production qualification rate of slits is increased, and the cost is reduced.