CN110141186A - A kind of autonomous directional type uncorrected visual acuity screening system - Google Patents
A kind of autonomous directional type uncorrected visual acuity screening system Download PDFInfo
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- 238000012216 screening Methods 0.000 title claims abstract description 26
- 230000004304 visual acuity Effects 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 60
- 210000000162 simple eye Anatomy 0.000 claims abstract description 57
- 230000005540 biological transmission Effects 0.000 claims abstract description 56
- 230000004438 eyesight Effects 0.000 claims abstract description 33
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 16
- 230000004382 visual function Effects 0.000 claims abstract description 13
- 230000002452 interceptive effect Effects 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 6
- 210000001508 eye Anatomy 0.000 claims description 58
- 238000005259 measurement Methods 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 claims description 6
- 208000036693 Color-vision disease Diseases 0.000 claims description 5
- 201000009310 astigmatism Diseases 0.000 claims description 5
- 201000007254 color blindness Diseases 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 3
- 201000009487 Amblyopia Diseases 0.000 claims description 2
- 238000000790 scattering method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 208000001491 myopia Diseases 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000004379 myopia Effects 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 208000004350 Strabismus Diseases 0.000 description 2
- 210000005252 bulbus oculi Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000167686 Reichardia Species 0.000 description 1
- 206010040007 Sense of oppression Diseases 0.000 description 1
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- 239000010424 alunite Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- 230000005226 mechanical processes and functions Effects 0.000 description 1
- ZRHANBBTXQZFSP-UHFFFAOYSA-M potassium;4-amino-3,5,6-trichloropyridine-2-carboxylate Chemical compound [K+].NC1=C(Cl)C(Cl)=NC(C([O-])=O)=C1Cl ZRHANBBTXQZFSP-UHFFFAOYSA-M 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0016—Operational features thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/036—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters for testing astigmatism
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/06—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing light sensitivity, e.g. adaptation; for testing colour vision
- A61B3/066—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing light sensitivity, e.g. adaptation; for testing colour vision for testing colour vision
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/08—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing binocular or stereoscopic vision, e.g. strabismus
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Abstract
The invention discloses a kind of autonomous directional type uncorrected visual acuity screening systems, comprising: control module；Two simple eye directional transmissions devices comprising backlight module, linear Fresnel lens and two pieces of certain size 60HZ liquid crystal display figure layers；Directional transmissions device；Range unit, for measuring tester the distance between to the display image layer, the control module controls the simple eye directional transmissions device and projects the left-eye image and eye image respectively；Half-reflecting half mirror is placed between two simple eye directional transmissions devices and is respectively in 45 °, changes the transmission direction of optical path；Interactive device；The control module detects the visual function of the tester according to the input signal and the test image.The different depth such as 50cm, 1m, 3m, 5m can be achieved at the same time apart from vision drop by apparatus above in the present invention, low consumption, high efficiency is veritably realized, the intelligent vision drop such as small in size, accuracy is high, in terms of preferably capable of being suitable for medical instrument.
Description
Technical field
The invention belongs to medical eye test apparatus fields, more particularly to a kind of autonomous directional type uncorrected visual acuity
Screening system.
Background technique
As science and technology develops with rapid changepl. never-ending changes and improvementsly, more and more electronic products enter among our lives, when us
Indulge in luxuriousness to one's heart's desire these electronic products it is colourful when, more ignore the fatigue of eyes.In fact, it is exhausted to obtain information by the mankind
It is most of all to derive from human visual system.
However, riseing year by year for myopia of student eye incidence is a worldwide problem, myopia hair for contemporary society
Highest raw rate is Asia.According to statistics: China A nearsighted person is about probably 300,000,000 populations at present, accounts for about world's myopia number
1/3.Given this data, adolescent myopia should cause national great attention.Therefore, the protection of eyes should cause to close extensively
Note, the help that we live, study is more crossed can be brought by possessing a pair of bright eyes, be played a multiplier effect.More into
One step, we should more understand the protection knowledge about eyes, accurately grasp eyesight status, could preferably protect
Eyes.Therefore eyesight detection can more clearly understand us oneself eyesight, to be vigilant oneself love protection eye.
Conventional vision detection, needs eyesight test chart lamp box to assist, and eye doctor is successively directed toward view with flexible baton from big to small
E word sighting target on power table, meanwhile, examinee need to be completely covered by another branch hole with shutter and pay attention to not pressing eyeball, stand from
The certain physical distance position of visual chart reads the opening direction of doctor's meaning E word.Traditional test mode needs the association of doctor
It helps, increases labour to a certain extent；Second, the use of shutter increases consumptive material to a certain extent；Third, test process, gear
Plate can be practised fraud by way of light leakage and oppression eyeball to a certain degree, causes test inaccuracy.
Its vision drop function is realized to a certain extent and solves problem above in addition, being directed toward backlight naked eye 3D display device,
So it needs 120HZ liquid crystal display panel, and when temperature is lower since liquid crystal drive problem causes the damage of 3D display process color
It loses；In addition, it is about that 21cm can realize all displays that E word table, which shows image probably, currently, market is difficult to find 21cm, 120HZ
The liquid crystal display panel of refresh rate reduces screen accounting to a certain extent.Third is confined to backlight and lens, in view of
Cross-interference issue is difficult to realize that the physical locations eyesight such as 50cm, 1M, 3M, 5M detects simultaneously.
Summary of the invention
In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of autonomous directional type uncorrected visual acuity sieves
System is looked into, to realize prosthetic, exempt from the vision inspection system covered.
The present invention provides a kind of autonomous directional type uncorrected visual acuity screening systems, comprising:
Two simple eye directional transmissions devices, connect with electronic control module, and the simple eye directional transmissions device includes backlight
Mould group, linear Fresnel lens and display image layer, the light that the backlight module issues is successively through the linear luxuriant and rich with fragrance alunite
Your lens and display image layer with formed distance display image layer for the left-eye image of the depths distance such as 50cm, 1M, 3M or 5M or
Person's eye image；
Range unit is connect with the electronic control module, for measuring tester between the display image layer
Distance, the control module simple eye directional transmissions device according to the distance controlling that the range unit measures is to the survey
The left eye of examination person projects the right eye of the left-eye image and another simple eye directional transmissions device of control to the tester
Project the eye image；
Interactive device, for receiving input signal that the tester inputs according to the test image and transmitting the input
Signal is to the control module, and the control module is according to the input signal and the test image to detect the tester
Eyesight.
Half-reflecting half mirror, for changing the direction of optical path, be placed between two simple eye directional transmissions devices and respectively with
It is in 45 °, and one of two simple eye directional transmissions devices reflect described left (right side) eye image by the half-reflecting half mirror, another
The simple eye directional transmissions device projects described right (left side) eye image by the half-reflecting half mirror.
Preferably, the backlight of the simple eye directional transmissions device determines position by ray Tracing Simulation of Volume Scattering method, to realize
Distance of the tester apart from the display image layer is the test of 50cm, 1M, 3M or 5M.
Preferably, the display image layer is the common liquid crystals screen that refresh rate is 60HZ, and size selection shows view enough
Mark size.
Preferably, the display image layer is in test process and is always on state.
Preferably, the range unit is placed in institute by dual camera ranging or ultrasonic distance measurement, the range unit
Half-reflecting half mirror top is stated, for testing the distance between person under test and the half-reflecting half mirror, according to person under test and described half
The distance between anti-pellicle mirror and display obtain the person under test away from the physical distance summation of half-reflecting half mirror and watch the view
Subject matter distance.
Preferably, the interactive device be include computer wireless handle and network cloud platform, wireless controller and the network
Cloud platform connection, the input signal of person's input to be tested is obtained for the person under test, and judges the test result of sighting target
And output test result；And the test result is uploaded to network cloud platform by the computer wireless handle, is surveyed to save
The eyesight status of examination person.
Preferably, determined by optical simulation software the position of the backlight module of described two simple eye directional transmissions devices with
And the tooth-shape structure of linear Fresnel lens, so that the left-eye image or eye image enter in specific physical location respectively
Left eye and right eye.
Preferably, the left-eye image and eye image that described two unidirectional orientation transmitting devices are shown are respectively white background view function
Can table and blank sheet, the left-eye image and eye image include all eyesight sighting targets and colour blindness sighting target, astigmatism sighting target,
Oblique amblyopia mark, three-dimensional sighting target wait and survey sighting target.
Preferably, the autonomous directional type uncorrected visual acuity screening system, it is characterised in that: simple eye visual function is tested,
One of described two unidirectional orientation transmitting devices show that visual function icon, another described two unidirectional orientation transmitting device are aobvious
Show white figure；Binocular visual function is tested, two unidirectional orientation transmitting devices transmit identical visual function icon.
Compared with prior art, the intelligentized vision drop system of the autonomous directional type of one kind provided by the invention passes through two
A simple eye orientation wound transmitting device respectively can be according to sight to left eye and right eye projection left-eye image and eye image, tester
The image observed inputs corresponding input signal so that control module judges the left vision and right vision of the tester, energy
In terms of being preferably suitable for medical instrument, it can veritably realize automation vision drop, avoid human resources and medical consumption
The loss of material；
Secondly, the vision drop of the different distances such as 50cm, 1M, 3M, 5M can be achieved at the same time in this system, it is naked to solve direction
The lesser difficulty of depth caused by the eye 3D technology limitation focal length of lens.
Again, this system is in test process using display image layer and is always on state, can prevent display screen 120HZ from refreshing
Quivering caused by not in time shields phenomenon, and is directed toward naked eye 3D because of the loss of liquid crystal color caused by liquid crystal drive, low temperature；
Moreover, being auxiliary image using the freedom of two simple eye directional transmissions devices and using white figure, largely
On solve the problems, such as that crosstalk is higher, veritably realize the effect of simple eye viewing, improve test accuracy.
Uncorrected visual acuity screening system of the invention can test stereopsis, the strabismus, colour blindness that conventional machines cannot test
And the projects such as astigmatism, veritably realize comprehensive screening to visual performance；The liquid crystal that this system passes through the suitable size of selection
Screen, largely reduces its volume, is convenient for carrying；The real-time survey of person under test more convenient to use of wireless controller, sound equipment
Examination；Cloud platform uses, and facilitates that patient is voluntary to know oneself visual performance trend.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the work of autonomous directional type uncorrected visual acuity screening system；
Fig. 2 is the structural schematic diagram of simple eye directional transmissions device；
Fig. 3 is the structural schematic diagram of autonomous directional type uncorrected visual acuity screening system；
In figure:
1: backlight module；2,3,4:LED lamp bar；5: fresnel lens array；6: liquid crystal display；7: half-reflecting half mirror；8: people
Eye；9,10,11: forming facula position；12,13: simple eye directional transmissions device.
Specific embodiment
The present invention creates transmitting device by two simple eye orientations and projects left-eye image and right eye figure to left eye and right eye respectively
Picture, the image that tester can arrive according to the observation input corresponding input signal so that control module judges the left side of the tester
Eye vision and right vision can veritably realize automation vision drop, avoid in terms of preferably capable of being suitable for medical instrument
The losses of human resources and medical supplies.
The invention discloses a kind of autonomous directional type uncorrected visual acuity screening systems, comprising: control module；Two simple eye fixed
To transmitting device, the simple eye directional transmissions device includes backlight module, linear Fresnel lens and two pieces of certain sizes
60HZ liquid crystal display figure layer；The backlight module LED light bar position is obtained using the method for Optics trace；Directional transmissions dress
It sets, improves the utilization rate of light, reduce the resource consumption due to caused by diffusing reflection；Range unit, for measuring tester
The distance between to described display image layer, described in the control module control simple eye directional transmissions device projects respectively
Left-eye image and eye image；Half-reflecting half mirror is placed in；Between two simple eye directional transmissions devices and respectively it is in 45 °, changes
The transmission direction of optical path；Interactive device；The control module is according to the input signal and the test image to detect the survey
The visual function of examination person.
In addition, the invention shows mixing and blank sheet that the display image of figure layer is set as white background and visual function icon,
Reduce certain opposite crosstalk.The different depth distance views such as 50cm, 1m, 3m, 5m can be achieved at the same time by apparatus above in the present invention
Power screening is veritably realized low consumption, high efficiency, the intelligent vision drop such as small in size, accuracy is high, can be preferably applicable in
In terms of medical instrument.
Below by specific preferred embodiment combination attached drawing, the present invention is described in further details.
Embodiment 1
Fig. 1 is a kind of flow diagram of the work of autonomous directional type uncorrected visual acuity screening system.As shown in Figure 1, should
Autonomous directional type uncorrected visual acuity screening system includes control module, two simple eye directional transmissions devices, range unit and interaction
Device.Control module is interacted for controlling two simple eye directional transmissions devices with interactive device.Two simple eye orientations pass
Defeated device is all connect with the control module.Fig. 2 is the structural schematic diagram of simple eye directional transmissions device.As shown in Fig. 2, described
Simple eye directional transmissions device includes backlight module 1, linear Fresnel lens 5 and display image layer 6.The backlight module 1
The light of sending is successively through the linear Fresnel lens and display image layer to form left-eye image or eye image.
The backlight module 1 mainly includes LED light bar 2,3,4；It should be evident that facula position, that is, vision area of its formation
It is one-to-one with vision area 9,10,11.The backlight of the backlight module 1 of the simple eye directional transmissions device is chased after by light
Mark analogy method determines position, to realize distance of the tester apart from the display image layer for the survey of 50cm, 1M, 3M or 5M
Examination.As shown in Fig. 2, direction illumination is veritably played after being disposed primarily in Fresnel Lenses in the position of three LED light bars 2,3,4
Effect, specific location can pass through according to actually required hot spot away from the two-dimensional physical position of fresnel lens array 5
Matlab software is simulated using ray-trace program.
Fresnel Lenses is as a direction tool, to mainly carrying out traveling to test with being directed toward to LED light bar light
The right and left eyes of person.
The display image layer is the liquid crystal display 6 that refresh rate is 60HZ, and is in test process and is always on state.It is described
The sighting target of test image of size and eyesight testing of liquid crystal display 6 is corresponding.The liquid crystal display 6 is mainly to be suitble to display certain big
It neglects based on logo image, greatly reduces the volume of system, and it not only meets flashing mainly based on 60HZ
Index, can also significantly reduce cost, easy processing, mainly as the medium of display sighting target image.
In actual mechanical process, the structure member of two simple eye directional transmissions devices is substantially completely identical, and the main distinction exists
The physics spacing that two-part LED light bar is staggered certain in backlight module 1 will mainly be formed by two-beam line and pass through
Fresnel Lenses is transferred to the right and left eyes of people just.In this way, a simple eye directional transmissions device is empty by showing in show layers
White image has certain reduction to act on the crosstalk in another transmitting device.In addition, in the actual process, it is each simple eye fixed
Can be there are three different backlight modules 1 and three fresnel lens array 5 to transmitting device, each backlight module 1 is right
One piece of fresnel lens array 5 is answered, each backlight module 1 includes the LED light bar of three different depth physical distances, by this
Three LED light bars of corresponding three modules of each vision area of design of structure.Inventors have found that the light that backlight module 1 is formed is saturating
It crosses fresnel lens array 5 to illuminate entire liquid crystal display panel enough and converge to form a vision area, have preferably for show uniformity
Effect.
The left-eye image and eye image that described two unidirectional orientation transmitting devices are shown be respectively Bai Tujia visual function table,
And blank sheet, the left-eye image and eye image include all eyesight sighting targets and colour blindness sighting target, astigmatism sighting target, tiltedly weak
At least one sighting target, three-dimensional sighting target.One of described two unidirectional orientation transmitting devices show visual function icon, described in another
Two unidirectional orientation transmitting devices show white figure.
Fig. 3 is the structural schematic diagram of autonomous directional type uncorrected visual acuity screening system.As shown in figure 3, the autonomous direction
Property uncorrected visual acuity screening system further includes half-reflecting half mirror 7, and the simple eye directional transmissions device is respectively arranged on the half-reflection and half-transmission
The two sides of mirror 7, the angle between the half-reflecting half mirror 7 and two simple eye directional transmissions devices is 45 °, described two
One of simple eye directional transmissions device reflects the left-eye image or eye image, another list by the half-reflecting half mirror 7
Eye directional transmissions device projects the left-eye image or eye image by the half-reflecting half mirror 7.
Specifically, the structure of autonomous directional type uncorrected visual acuity screening system shown in Fig. 3 includes simple eye directional transmissions dress
Set 12, simple eye directional transmissions device 13, range unit (dual camera or ultrasonic equipment), half-reflecting half mirror 7, control mould
Block.The system tests the right and left eyes 8 of tester.The simple eye directional transmissions device 12 and simple eye directional transmissions dress
13 tops and lower section for being individually positioned in half-reflecting half mirror 7 are set, distinguishing angle presentation with it is 45 °.In this way, from simple eye fixed
Horizontal transport is distinguished to people by half-reflecting half mirror 7 to transmitting device 12 and 13 different directions light of simple eye directional transmissions device
Right and left eyes 8.The upper and lower surface of the half-reflecting half mirror 7 is respectively provided with high-intensitive reflection and acts on high-intensitive transmission, mainly
It works to white light or RGB light, not only certain color is acted on, and reflectivity, higher transmission are mainly to avoid
More LED ray wastes, and reflect face-up, transmission down, so that the simple eye directional transmissions device 12 in top is passed through principle of reflection
Be transferred to it is simple eye, meanwhile, the simple eye directional transmissions device 13 in rear end is transmitted to other one eye.The range unit (such as can be with
It is dual camera) it is placed on the top of half-reflecting half mirror 7, utilize dual camera range measurement principle or ultrasonic distance measurement principle
The physical distance for testing person under test and half-reflecting half mirror 7, with display physical distance summation of the image layer away from half-reflecting half mirror 7
The as physical distance of person under test's viewing sighting target.
In present embodiment, the range unit passes through dual camera ranging or ultrasonic distance measurement, the range unit
Set on the half-reflecting half mirror 7, for testing the distance between person under test and the half-reflecting half mirror 7, according to person under test and institute
It states the distance between half-reflecting half mirror 7 and display and obtains person under test's viewing away from the physical distance summation of half-reflecting half mirror 7
The object distance of the sighting target.
Range unit is connect with the control module, for measuring tester the distance between to the display image layer,
The control module simple eye directional transmissions device according to the distance controlling that the range unit measures is to the tester's
Left eye projects the left-eye image and another simple eye directional transmissions device of control and projects institute to the right eye of the tester
State eye image.
Interactive device is used to receive the input signal that the tester inputs according to the test image and transmits the input
Signal is to the control module, and the control module is according to the input signal and the test image to detect the tester
Eyesight.The interactive device be include computer wireless handle and network cloud platform, wireless controller and the network cloud platform connect
It connects, the input signal of person's input to be tested is obtained for the person under test, and judge the test result of sighting target and export survey
Test result；And the test result is uploaded to network cloud platform by the computer wireless handle, to save the view of tester
Power situation.
When work, when person under test enters in test scope, range unit is taken the photograph or ultrasonic measurement tester by double
Physical distance, is then transferred to control module for ranging data, and control module can control each simple eye directional transmissions device simultaneously
In backlight module 1 and backlight module 2 open corresponding LED light bar respectively, and simultaneously control two simple eye directional transmissions devices
Image displa layer 1 (LCD) 1, image displa layer (LCD) 2 refresh sighting target image and white blank sheet respectively.When two simple eye
When the backlight module 1 of directional transmissions device opens specified LED light bar, pass through linear Fresnel lens 1, Fresnel Lenses 2
The display image of image displa layer 1, image displa layer 2 is respectively transmitted to the left eye and right eye of person under test by directional type respectively.
Then, person under test inputs the details of seen sighting target image to auxiliary tools such as the wireless controllers of interactive device
Information is got off with specified sighting target information, control module can be informed in real time by way of sound equipment according to actual sighting target information to
Survey person.In addition, person under test can enter cloud platform according to the form of barcode scanning, the eyesight variation tendency of oneself proximal segment time is known.Into
And ensures patient and timely cure and prevention.
The autonomous directional type uncorrected visual acuity screening system that present embodiment provides is used for vision-based detection, and this system can lead to
Cross the Fresnel Lenses and certain bits of two 10.4 inches, the LCD panel of 60HZ and two specific simulation sizes
The auxiliary of the backlight combination and half-reflecting half mirror 7 set collectively forms the system, and realizes the directive property of optical path.Pass through liquid crystal
The different sighting target image of Display panel realizes the measurement of the function in turn, and is realized using certain soft and hardware auxiliary to data
Storage.In addition, by the simulated implementation same system to backlight position to multiple spurs from test function, and can be more accurate
The projects such as colour blindness, stereopsis, strabismus and the astigmatism that ground test conventional measurement test-run a machine cannot be tested.
It should be understood that the invention is not limited to above embodiment, it is all to various changes or modifications of the invention not
The spirit and scope of the present invention are detached from, if these modification and variations belong to claim and equivalent technologies range of the invention
Within, then the present invention is also implied that comprising these modification and variations.
Claims (8)
1. a kind of autonomous directional type uncorrected visual acuity screening system, it is characterised in that comprising:
Two simple eye directional transmissions devices, connect with electronic control module, the simple eye directional transmissions device include backlight module,
Linear Fresnel lens and display image layer, the light that the backlight module issues is successively through the linear Fresnel lens
With display image layer to form distance display image layer as the left-eye image or right eye of the depths distance such as 50cm, 1M, 3M or 5M
Image；
Range unit is connect with the electronic control module, for measuring tester the distance between to the display image layer,
The control module simple eye directional transmissions device according to the distance controlling that the range unit measures is to the tester's
Left eye projects the left-eye image and another simple eye directional transmissions device of control and projects institute to the right eye of the tester
State eye image；
Interactive device, for receiving input signal that the tester inputs according to the test image and transmitting the input signal
To the control module, the control module detects the view of the tester according to the input signal and the test image
Power.
Half-reflecting half mirror is placed between two simple eye directional transmissions devices for changing the direction of optical path and is in it respectively
45 °, one of two simple eye directional transmissions devices reflect described left (right side) eye image, another list by the half-reflecting half mirror
Eye directional transmissions device projects described right (left side) eye image by the half-reflecting half mirror.
2. autonomous directional type uncorrected visual acuity screening system as described in claim 1, it is characterised in that: the simple eye orientation passes
The backlight of defeated device determines its physical location by ray Tracing Simulation of Volume Scattering method, is apart from the display image layer to realize
The test of the depths distance such as 50cm, 1M, 3M or 5M.
3. autonomous directional type uncorrected visual acuity screening system as claimed in claim 2, it is characterised in that: the display image layer
The common liquid crystals screen for being 60HZ for refresh rate, size selection show sighting target size enough.
4. autonomous directional type uncorrected visual acuity screening system as claimed in claim 3, it is characterised in that: the range unit is logical
Dual camera ranging or ultrasonic distance measurement are crossed, the range unit is placed in the half-reflecting half mirror top, to be measured for testing
The distance between person and the half-reflecting half mirror, according to the distance between person under test and the half-reflecting half mirror and display away from half
The physical distance summation of anti-pellicle mirror obtains the object distance that the person under test watches the sighting target.
5. autonomous directional type uncorrected visual acuity screening system as claimed in claim 4, it is characterised in that: the interactive device is
Including computer wireless handle and network cloud platform, wireless controller is connect with the network cloud platform, is obtained for the person under test
The input signal of person's input to be tested, and judge the test result of sighting target and output test result；And the computer without
The test result is uploaded to network cloud platform by line handle, to save the eyesight status of tester.
6. autonomous directional type uncorrected visual acuity screening system as claimed in claim 5, it is characterised in that: soft by optical analog
Part determines the position of the backlight module of described two simple eye directional transmissions devices and the tooth-shape structure of linear Fresnel lens, makes
It obtains the left-eye image or eye image enters images of left and right eyes in specific physical location respectively.
7. autonomous directional type uncorrected visual acuity screening system as claimed in claim 6, it is characterised in that: described two unidirectional fixed
The left-eye image and eye image shown to transmitting device is respectively white background visual function table and blank sheet, the left-eye image
It include that all eyesight sighting targets and colour blindness sighting target, astigmatism sighting target, oblique amblyopia mark, three-dimensional sighting target wait and survey sighting target with eye image.
8. autonomous directional type uncorrected visual acuity screening system as claimed in claim 7, it is characterised in that: test mono-vision function
Can, one of described two unidirectional orientation transmitting devices show visual function icon, another described two unidirectional orientation transmitting device
Show white figure；Binocular visual function is tested, two unidirectional orientation transmitting devices transmit identical visual function icon.
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