CN106291960A - The stereopsis inspection method of energy many distances viewing and device - Google Patents

The stereopsis inspection method of energy many distances viewing and device Download PDF

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Publication number
CN106291960A
CN106291960A CN201610939482.6A CN201610939482A CN106291960A CN 106291960 A CN106291960 A CN 106291960A CN 201610939482 A CN201610939482 A CN 201610939482A CN 106291960 A CN106291960 A CN 106291960A
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light
measured
lens
viewing window
viewing
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王元庆
徐斌
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Nanjing University
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Nanjing University
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

The stereopsis of energy many distances viewing checks device, and device is made up of adjustable directivity backing structure, measured's position sensing module, frame synchronizing signal extraction module, central processing module, image display panel;Central processing module is according to the measured's positional information received and frame synchronizing signal, and the frame for movement controlling adjustable directivity backing structure switches corresponding lens combination, and the luminescence unit in light engine is lighted in timesharing;Adjustable directivity backing structure includes the different lens combinations that the Fresnel Lenses of leaded light device, fixing Fresnel Lenses and the revolvable different focal that light path that light engine, condenser lens, leaded light device, triangular prism form, multilamellar light guide plate constitute realizes;Light, according to frame synchronizing signal timesharing, the luminescence unit that left images in light engine is corresponding, it is achieved light converges in ad-hoc location timesharing, form the viewing window being alternately present left images.

Description

The stereopsis inspection method of energy many distances viewing and device
One, technical field
The present invention relates to technical field of information display, the many distances especially with a kind of adjustable backlight structure are three-dimensional Inspection looks into device.
Two, background technology
Two of people are divided among nasion both sides, and the angle of two scannings is different, and scenery imaging on two eyes retinas has Deviation, i.e. " parallax ".Under normal circumstances, have two information of parallax by oneself, after brain convergence analysis, just make people have right The various object in three-dimensional (top to bottom, left and right, front and rear) space is far and near, just, the depth and concavo-convex perception, also referred to as the " stereopsis of people Feel ".Human stereo vision germinated from about 3 years old, the most perfect, within 9 years old, reached maturity.
Shortcoming stereoscopic vision person is referred to as stereo blind.We see thing with eyes, it is seen that be a plane picture, only During useful two eye gaze scenery, third dimension could be produced.If two eye visions differ greatly, or two can not be with regarding, i.e. During one eye fixation, order is in resting state at a glance, or one-eyed, cannot be by two visual informations obtained simultaneously for brain Visual centre processed, will lack and have three dimensions distance, the degree of depth and the vision of solid, be referred to as stereo blind.This is near A kind of binocular visual disorder just found by biologist for several years.It is often accompanied by amblyopia, stravismus, anisometropia and simple eye low regards The oculopathy such as power.
The sickness rate of stereo blind is about 2.67%, stereoscopic vision abnormal the most up to 30%, and China estimates at least 20,000,000 Stereo blind patient.General stereo blind phenomenon occurs in following crowd: stravismus patient, amblyopia patient, ocular injury patient, adult regard Dysfunction person, cataract patient.
Except not watching 3D film well, stereo blind also can affect occupation choice.Stereo blind patient's many works all Not competent.Such as pilot, various motor vehicles (ship) driver, athlete, the operation of various precision optical machineries and precision instrument, The manufacture of instrument, the professional such as microsurgery, remote sensing, remote measurement is required for excellent stereoscopic vision function, because this is straight Connect the fighting capacity being related to work efficiency and quality, personal safety and army.
The inspection method of stereoscopic vision has two classes: a class is two-dimensional space plane graph, utilizes aberration or polarisation method to make two There is the image of horizontal disparity in eye fixation, incoming brain synthesizes the stereo-picture with three dimensions feature, such as stereopsis Feel and check figure.Another kind of is real three-dimensional sighting target, allows person under inspection differentiate, such as binocular visual acuity analyzer.Stereoscopic vision function The objective indicator of quality is " Stereoacuity ", and it is to differentiate the ability of minimum level parallax between retina of both eyes image, typically It is 6~10 seconds angles.The Stereoacuity of one people is the least, and its stereoscopic vision function is the best.Stereoacuity is less than or equal to 60 seconds angles are that stereoscopic vision is normal, are that stereoscopic vision is abnormal more than 60 seconds angles, and stereoscopic vision disappearance is stereo blind.
It is single all to there is detection sample in above-mentioned method of testing, and detecting distance is limited, there is the problems such as monocular cue.
Parallax solid is also called binocular stereoscopic, has the image of parallax to put into respectively left and right two web by technological means The right and left eyes of beholder, the optic nerve maincenter through brain merges, and forms third dimension in the brain.Meanwhile, depending on Difference solid has the lowest string shadow rate, therefore can strictly control monocular cue.
Three, summary of the invention
The present invention seeks to, it is provided that a kind of many distances free stereo test device using changeable directivity backlight, Overcome the deficiency of above conventional detection devices, there is fabulous Detection results.
The present invention is achieved through the following technical solutions.Use the free stereo test dress of adjustable directivity backing structure Putting, device is processed by adjustable directivity backing structure, measured's position sensing module, frame synchronizing signal extraction module, central authorities Module, image display panel are constituted;Central processing module is according to the measured's positional information received and frame synchronizing signal, and control can The frame for movement of mode directivity backing structure switches corresponding lens combination, and the luminous list in light engine is lighted in timesharing Unit;Adjustable directivity backing structure includes that light path that light engine, condenser lens, leaded light device, triangular prism form, multilamellar are led It is different saturating that the Fresnel Lenses of the leaded light device that tabula rasa is constituted, fixing Fresnel Lenses and a revolvable different focal realizes Mirror combines;The light sent from light engine, realizes converging through condenser lens, after light guide plate more anti-by reflecting mirror It is mapped to first Fresnel Lenses, the most again by second Fresnel Lenses that can switch focal length;Second Fresnel Lenses Light be re-reflected on refractive power reflecting mirror after, realize the convergence of light through screen.The Fresnel Lenses combination of different focal Making light form viewing window in different positions, left images projects the right and left eyes of measured respectively, measured just may be used To see stereoscopic picture plane;The luminescence unit that left images in light engine is corresponding is lighted, it is achieved light according to frame synchronizing signal timesharing Line converges in ad-hoc location timesharing, forms the viewing window being alternately present.
The following element of optical routing forms, i.e. luminescence unit 1, condenser lens 2, leaded light device that is first light guide plate 3, triangular prism 4, triangular prism 5, leaded light device that is second light guide plate 6, triangular prism the 7, first lens the 8, second lens 9, the 3rd lens 10, Four lens the 11, first enocscope the 12, second enocscopes 13, display screen 14;Light presses above-mentioned optics direct or anti-from light source Penetrate until display screen 14;Its luminescence unit width w;Array of light emitting cells centre distance t, viewing window width W, viewing window it Spacing T;
The light that light engine sends pools viewing window in certain distance: at different viewing distances, watch window width Degree becomes, with luminescence unit length, the proportionate relationship fixed, and proportionality constant is β1, β2, β3, the ratio representing different distance the most respectively is normal Number;
W w = T t = β
In above formula, W represents the width of viewing window, and w represents the width of luminescence unit, and T represents between two viewing windows Distance, t represents the distance between two luminescence units.
The stereopsis of described energy many distances viewing checks that device carries out the method checked,
The many distances stereopsis using adjustable directivity backing structure checks device.Adjustable directivity backing structure, By different lens combinations, it is achieved that form measured at diverse location and watch window.Measured's position sensing module obtains Accurate left and right pupil position information, central processing module, after receiving measured's positional information and frame synchronizing signal, is controlled System switches adjustable directivity backlight timesharing and forms viewing window.Corresponding left and right figure is respectively fed to measured by backlight module Left and right pupil, make the right and left eyes of measured be respectively seen left images the most in the same time;Measured receives has parallax At brain visual centre compound stereoscopic image after two width images;Adjustable directivity backing structure, provides frame same for display screen Step backlight;Regulate switching device by lens, it is achieved different lens combinations, coordinate the light sent in light engine, in difference Position formed viewing window.
After measured position changes, CPU sends corresponding instruction and controls switching lens combination and light Learn the adjustment that engine implementation is corresponding, achieve light in this way and form viewing window at diverse location;Central authorities process mould Tuber, according to frame synchronization information, provides directivity backlight for left eye left image shows when and realizes light collection, at right figure As providing directivity backlight for right eye when of display and realizing light collection.Measured can only see sometime left figure or The right figure of person, therefore stereo content can realize high definition and shows, does not lose resolution.
Central processing module detects display content automatically, according to the difference of display content, freely cuts between 2D and 3D state Change, practical.
After central processing module receives the signal of measured's position sensing module, by the corresponding luminescence in light engine Unit is lighted;Meanwhile, central processing module receives frame synchronizing signal, and the luminescence unit in light engine is lighted in timesharing;? While showing left figure image, the luminescence unit corresponding with left figure is lit, and light forms left eye viewing window through optical system Mouthful;In like manner, while showing right figure image, the luminescence unit corresponding with right figure is lit, and light is formed through optical system Right eye viewing window mouth;Left and right viewing window timesharing presents, and projects the left and right pupil of measured respectively;Measured moves in position During, central processing module can be thus real according to the corresponding luminescence unit in the position adjustment light engine of measured Show right and left eyes viewing window to follow the right and left eyes of measured and move.
Regulation lens switching device refers to that regulating rotatable optical lens obtains different burnt by mechanical part switching lens Away from lens combination, coordinate the light that sends of light engine, achieve light collection at diverse location and form viewing window;From The light sent in light engine, through the light path being made up of condenser lens, leaded light device, triangular prism, is effectively increased light Journey, leaded light device uses light guide plate.
The light that light engine sends pools viewing window in certain distance: at different viewing distances, watch window width Degree becomes, with luminescence unit length, the proportionate relationship fixed, and proportionality constant is β1, β2, β3, the ratio representing different distance the most respectively is normal Number.
W w = T t = β
In above formula, W represents the width of viewing window, and w represents the width of luminescence unit, and T represents between two viewing windows Distance, t represents the distance between two luminescence units.
The invention has the beneficial effects as follows: compared with prior art, its remarkable advantage is:
1, painted switchable lenticular combination is used, it is achieved that measured watches stereoeffect in different distance;
2, use multilamellar leaded light device, improve light efficiency utilization rate;
3, using frame synchronization control algolithm, be precisely controlled left and right figure display backlight, string shadow rate is low, and monocular cue is few, display Effective;
4, Miniaturizable, easy to carry, practical;
5, use measured's position sensing module, be precisely controlled viewing the window's position, it is ensured that left and right figure project respectively by The right and left eyes of survey person, stereoeffect is good;
6, Time-sharing control, left and right figure resolution can be equal to display physical resolution, can ultra high-definition display stereoscopic picture plane;
7,2D and 3D automatically switches, easy to operate.
Compared with prior art, the viewing of the solution of the present invention monocular cue distance low, multiple, frivolous, ultra high-definition, plane Three-dimensional compatibility etc..
Four, accompanying drawing explanation
Fig. 1 is the overall structure side view of an embodiment;
Fig. 2 symmetry adjustable backlight structure can many distances viewing schematic diagram;
Fig. 3 condenser lens schematic diagram;
Fig. 4 triangular prism schematic diagram;
Fig. 5 lens switching device schematic diagram;
Fig. 6 refractive power reflecting mirror schematic diagram;
Fig. 7 system entirety theory diagram.
Five, detailed description of the invention
In figure, luminescence unit 1, condenser lens 2, leaded light device that is first light guide plate 3, triangular prism 4, triangular prism 5, leaded light Device that is second light guide plate 6, triangular prism the 7, first lens the 8, second lens the 9, the 3rd lens the 10, the 4th lens the 11, first folding Light microscopic the 12, second enocscope 13, display screen 14.Light is from light source leading or reflecting until display screen 14 by above-mentioned optical element;
Its luminescence unit width w, luminescence unit include the luminescence unit of corresponding left images;Array of light emitting cells centre-to-centre spacing Flat to equivalence from distance T, measured position A, measured position B, luminescence unit between t, viewing window width W, viewing window Distance U in face, viewing ratio V (A), viewing ratio V (B), virtual image object distance V '.
The present invention will be further described with embodiment below in conjunction with the accompanying drawings, and the basic thought of the present invention is to utilize the time-division former Reason, and combine measured's position sensing module, it is achieved left images projects measured's pupil respectively, makes measured in any position Put it can be seen that stereoeffect.Be necessary it is pointed out here that, following embodiment is served only for the present invention and does further Bright, it is impossible to be interpreted as limiting the scope of the invention, this art maturation personnel according to foregoing invention content to this Bright make some nonessential improvement and adjustment, still fall within protection scope of the present invention.
This device uses painted switchable lenticular combination, and whole device is by optical system, measured's position sensing module, frame synchronization Signaling module, central processing module, light engine and image display panel composition.In this embodiment, image display panel uses The liquid crystal display of 120HZ, is meeting guarantee refresh rate while timesharing shows.
System entirety principle is as follows: central processing module after receiving frame synchronizing signal, left image show same Time, light luminescence unit corresponding with left image in light engine, light forms left viewing through optical system at ad-hoc location Window.While right image shows, lighting luminescence unit corresponding with right image in light engine, light is through optical system Right watch window is formed at ad-hoc location.Central processing module, after receiving measured's positional information, lights light engine In the luminescence unit corresponding with measured position.After the position of measured changes, lens automatically switch, optics simultaneously Corresponding luminescence unit in engine is lighted, and the position after change forms watch window.Central processing module is detecting solid During content, automatically switch to three-dimensional play mode, and start measured's position sensing module, be simultaneously emitted by instruction control optics and draw Hold up and switch with lens.When flat content being detected, it is switched to plane display pattern.CPU can automatically detect and control Device display plane or stereo content.
In this embodiment, light engine is made up of a series of highlighted LED close-packed arrays, coordinates drive circuit to realize The arbitrarily light on and off of LED.The light sent from highlighted LED, can realize the light compression in YZ plane through condenser lens (2), This embodiment uses prism mirror realize the compression (such as Fig. 3) of light, the light dissipated is compressed into nearly directional light.Through overvoltage The light of contracting enters into the leaded light device (3,6) in guide-lighting module, uses light guide plate, utilize it to be totally reflected in this embodiment Principle achieves the lossless propagation of light.Light enters into (4,5) triangular prism from light guide plate, it is achieved that turning over of radiation direction Turn, finally send from triangular prism (7).
In this embodiment, the lens used are Fresnel Lenses.The Fresnel Lenses combination of different focal realizes Light forms viewing window at diverse location.Two kinds of Fresnel Lenses combinations are equivalent to the effect of single Fresnel Lenses, under Face illustrates with single Fresnel Lenses.
In one times of focal length of Fresnel Lenses, place highlighted LED (1), form the virtual image a long way off through Fresnel Lenses.Point The difference of bright LED location, the position of the virtual image is the most different.Virtual image image distance V ' and object distance U have a following relation:
1 - V ′ + 1 U = 1 f
Wherein f is the focal length of Fresnel Lenses, in this embodiment, and the second Fresnel Lenses the 9, the 3rd Fresnel Lenses 10 Different with the focal length of the 4th Fresnel Lenses 11.Mirror holder is i.e. rotated by regulation lens switching device (such as Fig. 5), it is achieved that Different Fresnel Lenses combinations, the i.e. first Fresnel Lenses 8 respectively with the second Fresnel Lenses the 9, the 3rd Fresnel Lenses 10 With the combination of the 4th Fresnel Lenses 11, light is made to form viewing window in different distances.Use different lens combination (profits Different with the focal length of lens combination), and be aided with light engine and achieve and form viewing window in different distance.Light is through luxuriant and rich with fragrance alunite After your lens combination, project (such as Fig. 6) on refractive power reflecting mirror, after LCD display (14), it is achieved that the remittance of light Poly-.
In this embodiment, measured's position sensing module is made up of software and hardware.Hardware includes three different Jiao Away from photographic head, can accurately catch measured's face feature in different positions.Adaboost algorithm is used to carry out candidate point Detection, then use and carry out the accurately fixed of face based on ASM (the Active Shape Model) algorithm improving SIFT feature Position.
In this embodiment, central processing module uses AVR single chip, by serial ports and measured's position sensing module Communication.Central processing module, according to the measured's positional information received and frame synchronizing signal, controls highlighted LED in light engine Light on and off.Concrete system block diagram such as Fig. 7.
Although the present invention is disclosed above with preferred embodiment, so it is not limited to the present invention.Skill belonging to the present invention Art field has usually intellectual, without departing from the scope of the present invention, when being used for a variety of modifications and variations.Cause This, protection scope of the present invention is when being as the criterion depending on those as defined in claim.

Claims (8)

1. the stereopsis of energy many distances viewing checks device, it is characterized in that using the free stereo of adjustable directivity backing structure Test device, device by adjustable directivity backing structure, measured's position sensing module, frame synchronizing signal extraction module, in Centre processing module, image display panel are constituted;Central processing module according to the measured's positional information received and frame synchronizing signal, The frame for movement controlling adjustable directivity backing structure switches corresponding lens combination, and sending out in light engine is lighted in timesharing Light unit;Adjustable directivity backing structure includes light path that light engine, condenser lens, leaded light device, triangular prism form, many The Fresnel Lenses of the leaded light device that layer light guide plate is constituted, fixing Fresnel Lenses and a revolvable different focal realizes not Same lens combination;The light sent from light engine, realizes converging through condenser lens, after light guide plate, then by reflection Mirror reflexes to first Fresnel Lenses, the most again by second Fresnel Lenses that can switch focal length;Second Fresnel After the light of lens is re-reflected on refractive power reflecting mirror, realize the convergence of light through screen;The Fresnel Lenses of different focal Combination makes light form viewing window in different positions, and left images projects the right and left eyes of measured, measured respectively Just can see stereoscopic picture plane;The luminescence unit that left images in light engine is corresponding is lighted according to frame synchronizing signal timesharing, it is achieved Light converges in ad-hoc location timesharing, forms the viewing window being alternately present left images.
The stereopsis of energy the most according to claim 1 many distances viewing checks device, it is characterized in that the following element of optical routing Composition, i.e. luminescence unit, condenser lens, leaded light device that is first light guide plate, the first triangular prism, the second triangular prism, second lead Tabula rasa, the 3rd triangular prism, the first lens, the second lens, the 3rd lens, the 4th lens, the first enocscope, the second enocscope, Display screen;Light or reflects until display screen by above-mentioned optics direct from light source;Its luminescence unit width w;Luminescence unit Distance T between array center's distance t, viewing window width W, viewing window;
The light that light engine sends certain distance after display screen pools viewing window: at different viewing distances, viewing window Mouth width becomes, with luminescence unit length, the proportionate relationship fixed, and proportionality constant is β1, β2, β3, represent the ratio of different distance the most respectively Example constant;
W w = T t = β
In above formula, W represent viewing window width, w represents the width of luminescence unit, T represent two viewing windows between away from From, t represents the distance between two luminescence units.
The stereopsis of energy the most according to claim 1 and 2 many distances viewing checks device, it is characterized in that using adjustable finger Many distances stereopsis of tropism backing structure checks device;Adjustable directivity backing structure, by different lens combinations, real Show and watched window diverse location formation measured;Measured's position sensing module obtains accurate left and right pupil position letter Breath, central processing module, after receiving measured's positional information and frame synchronizing signal, controls to switch the adjustable directivity back of the body Light timesharing forms viewing window;Corresponding left and right figure is respectively fed to the left and right pupil of measured by backlight module, makes measured Right and left eyes be respectively seen left images the most in the same time;Measured regards at brain after receiving the two width images with parallax Feel maincenter compound stereoscopic image;Adjustable directivity backing structure, provides frame synchronization backlight for display screen;Cut by lens regulation Changing device, it is achieved different lens combinations, coordinates the light sent in light engine, forms viewing window in different positions.
Method the most according to claim 3, is characterized in that CPU is sent out after measured position changes Go out corresponding instruction and control the adjustment that switching lens combination is corresponding with light engine realization, achieve light in this way not Co-located forms viewing window;Central processing module is according to frame synchronization information, when left image shows, provides directivity for left eye Backlight also realizes light collection, when right image shows, provides directivity backlight for right eye and realizes light collection;Measured exists Can only see left figure or right figure sometime, therefore stereo content can realize high definition and shows, does not lose resolution.
Method the most according to claim 3, is characterized in that central processing module detects display content automatically, according in display The difference held, freely switches between 2D and 3D state, practical.
Method the most according to claim 3, is characterized in that central processing module receives measured's position sensing module After signal, the corresponding flat light emission in light engine is lighted;Meanwhile, central processing module receives frame synchronizing signal, The luminescence unit in light engine is lighted in timesharing;While showing left figure image, the luminescence unit corresponding with left figure is lit, Light forms left eye viewing window mouth through optical system;In like manner, while showing right figure image, corresponding with right figure is luminous single Unit is lit, and light forms right eye viewing window mouth through optical system;Left and right viewing window timesharing presents, and projects tested respectively The left and right pupil of person;Measured is during position is moved, and central processing module can be according to the position adjustment light of measured Learn the corresponding luminescence unit in engine, it is achieved thereby that the right and left eyes that measured followed by right and left eyes viewing window moves.
The stereopsis inspection method of energy the most according to claim 1 many distances viewing, is characterized in that regulating lens switching dress Put and refer to regulate rotatable optical lens;Obtained the lens combination of different focal by mechanical part switching lens, coordinate optics The light of engine, achieves light collection at diverse location and forms viewing window;The light sent from light engine, Through the light path being made up of condenser lens, leaded light device, triangular prism, being effectively increased light path, leaded light device uses light guide plate.
The stereopsis inspection method of energy the most according to claim 1 many distances viewing, is characterized in that what light engine sent Light pools viewing window in certain distance: at different viewing distances, viewing window width becomes to fix with luminescence unit length Proportionate relationship, proportionality constant is β1, β2, β3, represent the proportionality constant of different distance the most respectively;
W w = T t = β
In above formula, W represent viewing window width, w represents the width of luminescence unit, T represent two viewing windows between away from From, t represents the distance between two luminescence units.
CN201610939482.6A 2016-10-25 2016-10-25 The stereopsis inspection method of energy many distances viewing and device Pending CN106291960A (en)

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CN109360504A (en) * 2018-12-04 2019-02-19 深圳奇屏科技有限公司 A kind of adjustable 3D-LED large screen of image-forming range
CN112558383A (en) * 2021-01-05 2021-03-26 深圳市本特利科技有限公司 Zooming illumination device for underwater target detection
CN112867432A (en) * 2018-05-20 2021-05-28 纽偌莱恩斯公司 Progressive lens simulator with axial power-distance simulator
CN113093402A (en) * 2021-04-16 2021-07-09 业成科技(成都)有限公司 Stereoscopic display, manufacturing method thereof and stereoscopic display system

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Publication number Priority date Publication date Assignee Title
CN112867432A (en) * 2018-05-20 2021-05-28 纽偌莱恩斯公司 Progressive lens simulator with axial power-distance simulator
CN112867432B (en) * 2018-05-20 2024-04-12 纽偌莱恩斯公司 Progressive lens simulator with axial power-distance simulator
CN109360504A (en) * 2018-12-04 2019-02-19 深圳奇屏科技有限公司 A kind of adjustable 3D-LED large screen of image-forming range
CN112558383A (en) * 2021-01-05 2021-03-26 深圳市本特利科技有限公司 Zooming illumination device for underwater target detection
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CN113093402A (en) * 2021-04-16 2021-07-09 业成科技(成都)有限公司 Stereoscopic display, manufacturing method thereof and stereoscopic display system
CN113093402B (en) * 2021-04-16 2022-12-02 业成科技(成都)有限公司 Stereoscopic display, manufacturing method thereof and stereoscopic display system

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Application publication date: 20170104