64 results about "Relative luminance" patented technology

The invention relates to a dynamic color cast compensation Demura method and system and a display screen, and belongs to the technical field of display. Comprising the following steps: collecting a white light channel picture, obtaining relative brightness data, calibrating the relative brightness data, and constructing a mapping function; according to the function, converting the relative brightness data to obtain first Lab data; obtaining a Lab data initial value of a to-be-compensated screen; calculating a color difference value according to the Lab data initial value and the first Lab data; performing visual perception weighted deviation conversion on the difference value to obtain color deviation; calculating a dynamic compensation weight according to the deviation; obtaining a color deviation evaluation index according to the weight and the color deviation; and generating second Lab data according to the evaluation index and the gradient vector of the color difference value, and performing inverse operation on the second Lab data to obtain a Demura compensation value. According to the invention, through joint compensation of brightness and chromaticity, chromaticity compensation missing is avoided, and meanwhile, through a dynamic compensation weight mechanism, noise amplification in a low-brightness interval is avoided, and the color uniformity of a display screen is improved.

The application provides a projection lens, which comprises eight lenses in sequence along an optical axis from a projection surface to an image source surface, and the eight lenses comprise: a first lens with positive focal power, the projection side of which is a convex surface; a second lens with negative focal power, the image source side of which is a concave surface; a third lens with negative focal power, the projection side of which is a convex surface and the image source side of which is a concave surface; a fourth lens with positive focal power, the projection side of which is a convex surface; a fifth lens with negative focal power, both the projection side and the image source side of which are concave surfaces; a sixth lens with positive focal power, both the projection side and the image source side of which are convex surfaces; a seventh lens with positive focal power, both the projection side and the image source side of which are convex surfaces; and an eighth lens with positive focal power, both the projection side and the image source side of which are convex surfaces. The projection lens provided by the application has small distortion, high resolution, low aberration, high relative luminance and good projection effect through reasonable configuration of the surface types of the lenses and reasonable matching of the focal powers.

An image enhancement method, a vehicle, a computer device, a program product and a storage medium are characterized in that the method comprises the steps that an image of a YUV domain is obtained according to an original image of an RGB domain, and the image of the YUV domain comprises an original brightness diagram and an original chromaticity diagram; obtaining illumination information and relative brightness information of the original brightness map according to the original brightness map; obtaining an adjusted brightness map according to the illumination information, the relative brightness information and an original brightness map; obtaining an adjusted chromaticity diagram according to the illumination information, the relative brightness information and the original chromaticity diagram; and obtaining an adjusted RGB domain image according to the adjusted brightness diagram and chromaticity diagram. Through the method, the image quality can be improved to a great extent, and a better image enhancement effect is achieved.

The invention provides a method and system for adjusting the illumination of an atmosphere lamp in a vehicle in a partitioned mode based on an increment PID algorithm, and belongs to the field of auxiliary illumination of the atmosphere lamp in the vehicle, and the method specifically comprises the steps: setting the illumination values of a plurality of partitions in the vehicle, the increment PID algorithm of each partition, and the setting parameters of an illumination sensor; the digital value of the illuminance sensor at the current moment is sent to an opposite MCU through a UART-CAN; the visible light illuminance X1 of the current partition is calculated; according to the target visible light illumination values St1, St2, St3 and St4, the proportionality coefficient Kp, the integral coefficient Ki, the differential coefficient Kd and a preset increment PID calculation formula, an output value OUTk is obtained to serve as the high level width of PWM, the output power and the output brightness of an LED are adjusted, and the illuminance value of each area is adjusted. According to the method, the illuminance of each area can be adjusted in real time, the fluctuation of the relative brightness of the LED caused by the fluctuation of the junction temperature of the LED is effectively reduced, and the overall illumination effect of the LED atmosphere lamp is improved and stabilized.

A device includes a LED die having a peak emission at a blue or shorter wavelength, a LED die having a peak emission at a red, orange, yellow, green, or cyan wavelength, and a homogenous light conversion material positioned to receive light emitted from the LED dies. The light conversion material including: (i) a first phosphor compound having a peak emission at a green wavelength; (ii) a second phosphor compound having a peak emission at an orange wavelength; and (iii) a third phosphor compound having a peak emission at a red, orange, yellow, green, or cyan wavelength. The device is a packaged LED device and a relative concentration of the phosphor compounds and a relative luminosity of the LED dies are selected so the device emits white light satisfying a preference P1 and a fidelity F3 according to a TM-30 standard for color rendering.

The application discloses an optical lens, which comprises, in sequence from an object side to an imaging surface along an optical axis, a first lens with negative focal length, whose object side is a convex surface and whose image side is a concave surface; a second lens with negative focal length, whose object side is a convex surface and whose image side is a concave surface; a third lens with negative focal length, whose object side and image side are both concave surfaces; a fourth lens with positive focal length, whose object side is a concave surface or a plane, and whose image side is a convex surface; a fifth lens with positive focal length, whose object side is a convex surface and whose image side is a concave surface; a diaphragm; a sixth lens with positive focal length, whose object side and image side are both convex surfaces; a seventh lens with negative focal length, whose object side and image side are both concave surfaces, and the sixth lens and the seventh lens form a cemented lens with negative focal length; an eighth lens with positive focal length, whose object side and image side are both convex surfaces; and a ninth lens with positive focal length, whose object side is a convex surface. The optical lens has the advantages of large wide angle, high relative luminance and high resolving power.

The application relates to a small unmanned aerial vehicle lens and a working method thereof, wherein the lens is composed of a first lens, a diaphragm, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence along the light incidence direction; the lens adopts seven lenses, the lens resolution is improved by selecting appropriate lens materials and matching appropriate aspheric surface structures, and a high-definition effect is achieved; the first lens is made of glass material, the wear resistance of the lens is improved; a large number of plastic lenses are adopted, and the advantages of light weight, small size, low cost and the like are realized; the aperture value is less than F1.6, the peripheral relative luminance is greater than 50%, the lens has large light transmission capacity; the lens has a large imaging target surface and can be adapted to multiple chips.

The application provides an optical lens which is composed of four lenses and sequentially comprises, along an optical axis from an object side to an imaging surface: a first lens with negative optical power, the object side of which is a convex surface and the image side of which is a concave surface; a second lens with positive optical power, the image side of which is a convex surface; a third lens with negative optical power, the object side of which is a concave surface and the image side of which is a convex surface; and a fourth lens with negative optical power, the object side of which is a concave surface and the image side of which is a convex surface; wherein the effective focal length f of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy 7<f / EPD<8. The optical lens provided by the application has one or more advantages such as long focal length, large F number small aperture, large depth of field and high relative luminance through specific surface shape matching and reasonable optical power distribution.

The invention relates to a method for adjusting the luminance of at least two subpixel units (S1, Sn, S1', Sn'), wherein each subpixel unit (S1, Sn, S1', Sn') comprises at least one subpixel (R, G, B, R1, G1, B1, R2, G2, B2) of a pixel (P) of an active matrix organic light-emitting diode (AMOLED) display. The AMOLED display comprises public mode subpixel units (S1, Sn) configured for display in a public mode and privacy mode subpixel units (S1', Sn') configured for display in a privacy mode. For each subpixel unit (S1, Sn, S1', Sn'), a relative luminance loss (ΔL) is determined with respect to an initial luminance of the respective subpixel unit (S1, Sn, S1', Sn'). The most degraded subpixel unit (S1, Sn, S1', Sn') is determined as the subpixel unit (S1, Sn, S1', Sn') with the highest relative luminance loss (ΔL).If the relative luminance loss (ΔL) of the most degraded subpixel unit (S1, Sn, S1', Sn') exceeds a loss limit (G, G'), a dimming factor less than or equal to 100 percent is determined for each subpixel unit (S1, Sn, S1', Sn') such that the normalized luminance (LN) of the respective subpixel unit (S1, Sn, S1', Sn') multiplied by the dimming factor is equal to the normalized luminance (LN) of the most degraded subpixel unit (S1, Sn, S1', Sn'), but at least equal to a predetermined normalized luminance limit (LNG, LNG1, LNG2). Each subpixel unit (S1, Sn, St, Sn') is driven with a gray value and / or drive current adapted according to the respective dimming factor. If the relative luminance loss (∆L) of the most degraded subpixel unit (S1, Sn, S1', Sn') does not exceed the loss limit (G, G'), no subpixel unit (S1, Sn, S1', Sn') is adjusted with a dimming factor.

The invention provides a precision limit calculation and joint estimation method and device for point target positioning and photometric measurement, relates to the technical field of optical imaging type precision measurement, and aims to solve the problem of inaccurate positioning estimation caused by brightness change of a to-be-measured target. The method comprises the steps that according to an imaging PSF model of an optical system, a probability density function of a pixel response matrix for imaging a to-be-measured point target by an image sensor about an image spot center two-dimensional position and an energy coefficient is constructed, and the energy coefficient represents the relative brightness of the to-be-measured point target and a modeling point target; according to a log-likelihood function of the probability density function, calculating a combined three-dimensional precision limit of an image spot center two-dimensional position and an energy coefficient; and on the basis of a maximum likelihood estimation method, according to a log-likelihood function of the probability density function, calculating the two-dimensional position of the center of the image spot and an energy coefficient as a joint estimation result, and evaluating the precision of the joint estimation result through the joint three-dimensional precision limit.

The utility model relates to a machine vision and industrial detection technology, in particular to a rapid focusing industrial lens structure, an industrial lens, a control system and an industrial vision detection device, wherein the rapid focusing industrial lens structure adopts an electrowetting liquid lens to realize millisecond-level automatic focusing. A fast focusing industrial lens structure is composed of eight glass lenses and an electric control liquid lens, and the nominal value of the optical focal length is 35 mm. Within the object distance range of 225-600mm, the liquid lens realizes millisecond-level automatic focusing by adjusting the curvature of a liquid interface, and the optical back focal length and the mechanical back focal length are kept unchanged. Through actual measurement, the absolute value of lens distortion is less than or equal to 2%, the curvature of field is less than or equal to + / -0.2 mm, the full-field relative illumination is greater than or equal to 95%, and the high-resolution imaging requirements of industrial vision, automatic detection and robot precise positioning scenes can be met.

The application discloses a collimation system for a diffraction waveguide, which comprises, in order from the object side to the image side along the optical axis, a first lens group, a diaphragm, a second lens group, a prism equivalent lens, a window protection sheet and an image plane position. The first lens group is composed of a positive focal power lenticular lens, a negative focal power meniscus lens and a cemented lens; the second lens group comprises a negative focal power biconcave lens, a positive focal power meniscus lens and a double convex / biconcave lens combination, forming a double Gauss symmetric structure. The total length of the system is less than 90 mm, a global surface mirror design is adopted, the focal length ratio relationship (0.5<|F1 / F0|<2.5, 2.5<|F2 / F0|<4.5) is met, and the ratio of the rear working distance to the focal length is greater than 2. The application is optimized for the diffraction waveguide technology, the cemented lens has stronger chromatic aberration correction ability, the double Gauss structure improves the relative luminance of the edge field of view (>90%), and the total length of the system is shorter (<90 mm), which meets the high-angle precision requirement of the diffraction grating to parallel light, is suitable for AR glasses, vehicle HUD and other scenes, and has the advantages of high collimation, low distortion (<0.15%) and compactness.

A visualization system (106) with customizable illumination cycles for addressing relative brightness differences between different illumination sources. A system includes an image sensor (124) including an array of pixels (125) and a transmitter (102) including a plurality of electromagnetic radiation sources (138), wherein the plurality of electromagnetic radiation sources includes a first source and a second source. The transmitter cycles at least a portion of the plurality of electromagnetic radiation sources according to a pulse period including a plurality of pulse emissions by the first source and a plurality of pulse emissions by the second source. When the image sensor reads out a data frame corresponding to the transmission of the first source, at least a portion of the plurality of pulsed transmissions of the second source overlaps a readout period of the image sensor.

The embodiment of the application discloses a high-definition zoom lens applied to micro-nano high-precision 3D printing, comprising: coaxially arranged lens groups with positive light angles, a diaphragm, a light splitting device, a galvanometer, a protective glass and an imaging surface, wherein the lens groups comprise coaxially arranged first group lenses and second group lenses in sequence, and the diaphragm is located between the first group lenses and the second group lenses. Through the high-definition zoom lens, the printing pixel size can be continuously changed, the lens distortion is small, the relative luminance is high, the light efficiency is high, and the use requirements are met.

The application discloses an HDR image conversion method and device based on luminance metadata expansion, equipment and a storage medium, and relates to the technical field of image processing. The method comprises the following steps: training a neural network by using a standard HDR image satisfying a high peak value condition to obtain a target model; setting a nominal peak luminance of a to-be-converted image as an effective source peak luminance, normalizing to obtain a relative luminance distribution feature, and constructing a peak value condition vector containing a target peak luminance; generating local dynamic metadata by using the target model, performing dimension interpolation in combination with pixel luminance and spatial position, and obtaining pixel-level expansion parameters; converting the image to a to-be-adjusted image under the target peak luminance based on the expansion parameters, and constructing a luminance mapping curve to determine an output luminance; and adjusting color channel values according to a ratio of the relative luminance distribution feature to the output luminance to obtain a converted HDR image, so that the efficiency of image conversion is improved.

The application provides an optical lens and an electronic device. The optical lens comprises: a first lens, the first lens having negative optical power, a first side of the first lens being a convex surface, and a second side of the first lens being a concave surface; a second lens, the second lens having positive optical power, a first side of the second lens being a convex surface, and a second side of the second lens being a convex surface; a third lens, the third lens having negative optical power, a second side of the third lens being a concave surface; a fourth lens, the fourth lens having positive optical power, a first side of the fourth lens being a convex surface, and a second side of the fourth lens being a convex surface; a fifth lens, the fifth lens having positive optical power, a first side of the fifth lens being a convex surface; and a sixth lens, the sixth lens having positive optical power, a first side of the sixth lens being a convex surface. The application solves at least one of the problems of low relative luminance, poor resolving power, strong ghost image and small angular resolution in the prior art.

The application discloses an optical lens, which comprises seven lenses and a liquid lens, and sequentially comprises, along an optical axis from an object side to an imaging surface, a first lens with negative optical power, the object side of which is a convex surface and the image side of which is a concave surface; a second lens with negative optical power, the object side of which is a convex surface and the image side of which is a concave surface; a third lens with positive optical power, the object side and the image side of which are both convex surfaces; a fourth lens with positive optical power, the object side and the image side of which are both convex surfaces; a liquid lens with optical power, which presents different focal lengths according to different applied voltages; a fifth lens with positive optical power, the object side and the image side of which are both convex surfaces; a sixth lens with negative optical power, the object side of which is a concave surface and the image side of which is a convex surface; and a seventh lens with positive optical power, the object side of which is a concave surface and the image side of which is a convex surface. The optical lens provided by the application has the advantages of small total length, high relative luminance, high resolving power and the like.

A method for determining the optimal gain ratio for image fusion of large dynamic range is proposed. Firstly, a dual-gain imaging model is constructed based on the low and high gain data obtained by SCMOS. Then, the model is used to simulate the high and low gain images under different gain ratios, and the HDR results of image fusion of large dynamic range are obtained based on the dual-gain images. Secondly, the problem of image quality degradation caused by the large number of overexposed pixels in the high gain image, and the quality evaluation requirements of the HDR image are considered, and the optimal gain ratio discrimination function of SCMOS detector is constructed based on the relative brightness saturation ratio, the sharpness index and the gray weighted index. Finally, the gain ratio corresponding to the maximum value of the optimal gain ratio discrimination function is selected as the optimal gain ratio value for image fusion of large dynamic range.

The present invention discloses a method for controlling lighting in a tunnel diversion area, comprising: obtaining a relationship model for changes in visual distance and brightness value relative to brightness ratio generated based on multiple visual recognition samples, where each visual recognition sample includes at least two of the following: a minimum visual distance for an observer observing a target in a low-brightness lighting section from a high-brightness lighting section, a first brightness value for the low-brightness lighting section, a second brightness value for the high-brightness lighting section, and a brightness ratio of the second brightness value relative to the first brightness value; obtaining a safe visual distance for the tunnel, a first brightness value for the low-brightness lighting section, or a second brightness value for the high-brightness lighting section; determining, based on the safe visual distance and the first or second brightness value of the tunnel, a maximum brightness ratio that satisfies the safe visual distance at the first or second brightness value using the relationship model; and selectively setting a transition lighting section between the high-brightness lighting section and the low-brightness lighting section of the tunnel based on the maximum brightness ratio. The method of the present invention can improve the safety of tunnel diversion areas.

The invention discloses a light source setting method of an AI camera in an animal experiment system, the animal experiment system comprises an experiment box body and an animal observation box arranged in the experiment box body, and the periphery of the animal observation box is of a transparent plate structure; a plane mirror is obliquely arranged around at least one side of the animal observation box, and a camera is arranged above the experiment box body corresponding to the plane mirror; the method comprises the following steps: arranging a light source above an experimental box body, wherein the light source emits vertical light to illuminate the area of an animal observation box; anti-dazzling screens are arranged at the upper ends of the transparent plate structures on the periphery of the animal observation box, and the anti-dazzling screens prevent vertical light from directly irradiating the inner and outer side surfaces of the transparent plate structures; imaging of the vertical optics in the animal observation box in the horizontal direction enters the camera from the plane mirror to be shot and collected. The relative brightness of the impurities is reduced through the anti-dazzling screen, so that the impurities are not obvious in imaging, and the accuracy of animal behavior analysis is facilitated.

The invention discloses an in-cabin looking-around confocal lens and a camera device and a driving tool with the same, the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side, and the following conditions are met: 13.14 lt; fOV / Ym / 2lt; 24.36, FOV is the angle of view of the lens, and Ym is the image height of the lens corresponding to the FOV. According to the invention, large-view-field coverage is realized, and the consistency of visible light and infrared imaging is considered at the same time; it is ensured that the lens can shoot high-definition pictures at the high temperature of + 125 DEG C and the low temperature of-40 DEG C; the imaging resolution is high, the MTF level is kept excellent in a full-view-field range, and center and edge imaging is balanced; the aberration correction capability is outstanding, the chromatic aberration control is excellent, the chromatic aberration is stably controlled within 2pixel, and the purple edge inhibition effect is remarkable; and when the field angle is 80 degrees, the relative illumination is higher than 50%, and the image brightness distribution is uniform.

The present application relates to a kind of wide-angle large light vehicle lens, it is related to visual lens technical field.The lens is composed of six lenses, from object side to image side along optical axis in order: the first lens with negative refractive power, the second lens with negative refractive power, the third lens with positive refractive power, the fourth lens with positive refractive power, the fifth lens with negative refractive power and the sixth lens with positive refractive power, adopt glass-plastic hybrid structure, through the combination of four plastic aspheric lenses and two spherical lenses, the wide-angle design of focal length 3mm is realized.The lens has F1.5 Large light quantity, and the relative luminance of full field of view is greater than 50%, and the optical total length is less than 22mm, and the structure is light and compact.System realizes athermal design by reasonable allocation of optical power, ensure clear imaging in-40 ℃ to +105 ℃ Environment, can be adapted to five million pixel sensor.The present application has large field of view (up to 143 °), high resolving power and strong chromatic aberration suppression.

A display screen including an image reproduction unit with a control unit and detector for detecting a translation of the image reproduction unit relative to an initial position and / or a rotation of the image reproduction unit relative to an initial orientation and / or for detecting an absolute or relative position of the image reproduction unit with respect to a reference system. The image reproduction unit changes, for a portion of its image surface, the relative luminance distribution curve for contents displayed thereon along a direction R which is selectable but fixedly oriented with respect to the image reproduction unit when a translation path detected by the detector relative to the initial position is above a threshold value and / or a detected angle of rotation relative to the initial orientation is above a respective threshold value and / or the absolute position or relative position with respect to a reference system is outside a tolerance.

The application provides an optical lens and an electronic device with the same. The optical lens comprises: a first lens, the first lens having negative optical power, the object side of the first lens being a convex surface, and the image side of the first lens being a concave surface; a second lens, the second lens having negative optical power, the object side of the second lens being a concave surface, and the image side of the second lens being a concave surface; a third lens, the third lens having positive optical power, at least one of the object side and the image side of the third lens being a convex surface; a fourth lens, the fourth lens having positive optical power, at least one of the object side and the image side of the fourth lens being a convex surface; a fifth lens, the fifth lens having optical power, at least one of the object side and the image side of the fifth lens being a convex surface; and a sixth lens, the sixth lens having optical power, at least one of the object side and the image side of the sixth lens being a convex surface. The application solves the problem that the optical lens in the prior art cannot simultaneously have a large aperture, high relative luminance and miniaturization.

To reduce labor when preparing a colored pattern in advance for estimating the kind of a light source.SOLUTION: The color sample 10 has sample color regions 12B1, 12B2, 12B3, 12B4, 12B5, 12BH, 12RGB, 12V1, and 12V2 corresponding to the observation result of the color of the illumination target 1 illuminated with illumination light L close to any one of a plurality of types of illumination light (CIE LED illumination conditions). However, in the irradiation target 1, the absorbance of blue, green, and yellow light is higher than the absorbance of red and purple light, and the reflectance of red and purple light is higher than the reflectance of blue, green, and yellow light. Further, the illumination light has types BH and RGB in which the relative brightness takes the maximum value in red, types V1 and V2 in which the relative brightness takes the maximum value in purple, and types B1, B2, B3, B4, and B5 in which the relative brightness takes the maximum value in blue.SELECTED DRAWING: Figure 3

The invention relates to a method for adapting the luminance of at least two sub-pixel units (S1, Sn, S1', Sn'), wherein each sub-pixel unit (S1, Sn, S1', Sn') comprises at least one sub-pixel (R, G, B, R1, G1, B1, R2, G2, B2) of a pixel (P) of an active matrix organic light emitting diode (AMOLED) display. The AMOLED display comprises public mode sub-pixel units (S1, Sn) which are configured for a display function in a public display mode and privacy mode sub-pixel units (S1', Sn') which are configured for a display function in a privacy display mode. For each sub-pixel unit (S1, Sn, S1', Sn'), the relative luminance loss (∆L) with respect to the initial luminance of the respective sub-pixel unit (S1, Sn, S1', Sn') is determined. The most degraded sub-pixel unit (S1, Sn, S1', Sn') is determined as the sub-pixel unit (S1, Sn, S1', Sn') with the highest relative luminance loss (∆L). If the relative luminance loss (∆L) of the most degraded sub-pixel unit (S1, Sn, S1', Sn') exceeds a loss limit value (G, G'), a dimming factor of less than or equal to 100 percent is determined for each sub-pixel unit (S1, Sn, S1', Sn') in such a manner that the normalized luminance (LN) of the respective sub-pixel unit (S1, Sn, S1', Sn') multiplied by the dimming factor is equal to the normalized luminance (LN) of the most degraded sub-pixel unit (S1, Sn, S1', Sn') but at least equal to a specified normalized luminance limit value (LNG, LNG1, LNG2). Each sub-pixel unit (S1, Sn, S1', Sn') is controlled by means of a grey value and / or control current which is adapted according to the respective dimming factor.

The invention discloses a high-light-flux low-light-level night vision lens and electronic equipment. The lens comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged from the object side to the image side along the optical axis. A nine-piece lens structure is adopted, so that the lens realizes the design of large light transmission, namely the working F number of the optical system is 1.3, the optical distortion is less than-2.8%, the relative illumination is greater than 40%, clear and stable images can be provided under the condition of extremely low illumination, the optical system can be matched with a 1-inch detector for use, the imaging quality is good, and the imaging quality from the center to the edge is relatively uniform.

The invention provides an indoor illumination control method based on a sky model, which comprises the following steps that: an illumination mode is controlled, so that the fitting error between the relative illumination distribution of a ceiling surface and the target relative brightness distribution is within 5%, and the target relative brightness distribution is that the sky model reflecting the sky relative brightness distribution is placed indoors; recording an included angle beta formed by a connecting line from the position of the human eyes to the middle point A of the short edge of the ceiling surface and the horizon of the sky model; determining a point on the sky model, the included angle between the connecting line of the point D and the horizon being beta, as a mapping illuminance starting point B; dividing an illumination brightness arc line from the point B to the zenith point O of the sky model into N equal parts, mapping the illumination relative brightness distribution of the sky model to the ceiling surface according to the mode that the illumination brightness of the equal parts corresponds to the illumination brightness of the equal parts, and then rotating for a circle by taking the point C as the center to obtain the relative illumination distribution. According to the invention, the significance, authenticity and stability of indoor reproduction of the outdoor light environment from the visual angle of people can be ensured, and indoor reproduction of the large-area and ultrahigh-space outdoor light environment is realized.

The utility model relates to the technical field of visual inspection, and discloses a visual inspection device which comprises an image detection device, a first reflecting prism group and a beam splitter prism, the first reflecting prism group is used for transmitting a first feature image of a workpiece to the beam splitter prism, and the beam splitter prism is used for transmitting the first feature image to the image detection device; a reflecting film used for reflecting first color light to the image detection device is arranged on the back face, away from the image detection device, of the beam splitter prism, and the reflecting film is used for enabling the relative brightness of the first feature image to be higher. The visual inspection device disclosed by the utility model is beneficial to more obviously highlighting the characteristics on the detected workpiece in an image.

The application provides an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side: a first lens with negative optical power, the second side of the first lens being concave; a second lens with positive optical power, the first side of the second lens being convex; a third lens with optical power, the first side of the third lens being concave and the second side being convex; a fourth lens with negative optical power, the second side of the fourth lens being concave; a fifth lens with positive optical power, the first side of the fifth lens being convex; and a sixth lens with optical power, the first side of the sixth lens being concave and the second side being convex. The application solves the problem that the optical lens in the prior art cannot simultaneously have high relative luminance, long back focal length, high resolution and low cost.