CN109077701A - A kind of dynamic visual acuity detection device - Google Patents
A kind of dynamic visual acuity detection device Download PDFInfo
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- CN109077701A CN109077701A CN201810120484.1A CN201810120484A CN109077701A CN 109077701 A CN109077701 A CN 109077701A CN 201810120484 A CN201810120484 A CN 201810120484A CN 109077701 A CN109077701 A CN 109077701A
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- target image
- virtual view
- view target
- visual acuity
- detection device
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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
- A61B3/0016—Operational features thereof
- A61B3/0041—Operational features thereof characterised by display arrangements
Abstract
The embodiment of the present invention provides a kind of dynamic visual acuity detection device, including parallax adjustment module, configures to adjust the parallax that right and left eyes virtually regard target image according to required space or depth perception；Virtual view target generation module configures to be simultaneously that right and left eyes generate the stimulus signal with the virtual view target image of the parallax respectively；Virtual view target optical display module, configures to show the virtual view target image；Feedback collection module configures to acquire measured to the feedback data of view target variation；Feedback processing modules, configuration virtually regards target image change to compare feedback data and reality, obtain comparison result, the dynamic visual acuity detection device that inventive embodiments provide can guarantee to simulate the various visual stimulus in reality in the case where not interfered by ambient light conditions, to obtain more accurate dynamic visual acuity testing result.
Description
Technical field
The present invention relates to eyesight detection technique field, in particular to a kind of dynamic visual acuity detection device.
Background technique
Dynamic visual acuity refers to that there are the visual resolving powers of observer when relative motion between object observing and observer.It is dynamic
Can the quality of state eyesight be closely related with the task that complete under motion state.Therefore, dynamic visual acuity detection is checking respectively
Class driver improves driver training effect and plays an important role.
Summary of the invention
A kind of dynamic visual acuity detection device of the embodiment of the present invention, including parallax adjustment module, configuration come according to required for
Space or depth perception adjusts the parallax that right and left eyes virtually regard target image；Virtual view target generation module configures to be simultaneously right and left eyes difference
Generate the stimulus signal with the virtual view target image of the parallax；Virtual view target optical display module, configuration are described to show
Virtual view target image；Feedback collection module configures to acquire measured to the feedback data of view target variation；Feedback processing modules,
Configuration virtually regards target image change to compare feedback data and reality, obtains comparison result.
Optionally, described virtual to be moved in a manner of diameter depth depending on target image.
Optionally, the feedback collection module includes touch screen.
Optionally, it is described it is virtual depending on target optical display module include microdrawing image source submodule and projection optics submodule.
Optionally, the microdrawing image source submodule includes for showing that the liquid crystal micro of the virtual view target image is shown
Device, the projection optics submodule include the eyepiece optics unit being made of multiple lens, and the eyepiece optics unit is set to
In lens barrel, and fixed by spacer ring, pressing ring and gasket.
Optionally, described virtual depending on further including showing mould for adjusting the virtual view target optics in target optical display module
The interpupillary adjustment mechanism of the interpupillary distance of eyepiece optics unit described in block, by adjusting interpupillary distance and measured so that the video eyeshade
Interpupillary distance adaptation.
Optionally, it is described it is virtual depending on target image include visual chart.
The embodiment of the present invention provides dynamic visual acuity detection device, the view generated with right and left eyes by the parallax of virtual view target image
Based on feeling depth, the dynamic visual acuity detection of virtual view target is realized, it is ensured that in the case where not interfered by ambient light conditions
Various visual stimulus in simulation reality, to obtain more accurate dynamic visual acuity testing result.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the dynamic visual acuity detection device that one embodiment of the invention provides；
Fig. 2 is the video eyeshade schematic diagram for the dynamic visual acuity detection device that one embodiment of the invention provides；
Fig. 3 is the video eyeshade overall structure diagram for the dynamic visual acuity detection device that one embodiment of the invention provides；
Fig. 4 (a) is the video eyeshade internal structure chart for the dynamic visual acuity detection device that one embodiment of the invention provides；
Fig. 4 (b) is Fig. 4 (a) A-A ' for the dynamic visual acuity detection device that one embodiment of the invention provides to cross-sectional view；
Fig. 5 be the dynamic visual acuity detection device that one embodiment of the invention provides video eyeshade in virtually regard target optics and show
The structural schematic diagram of module；
Fig. 6 be the dynamic visual acuity detection device that one embodiment of the invention provides video eyeshade in virtually regard target optics and show
Module direct viewing type schematic diagram of optical system；
Fig. 7 is the schematic diagram of the feedback collection module for the dynamic visual acuity detection device that one embodiment of the invention provides；
Fig. 8 is the schematic diagram of the parallax adjustment module for the dynamic visual acuity detection device that one embodiment of the invention provides；
Fig. 9 is a kind of view target image that one embodiment of the invention uses；
Figure 10 is the sighting target schematic diagram that one embodiment of the invention uses；
Figure 11 is target generation module to be regarded described in one embodiment of the invention virtually as the liquid crystal micro display life of left and right two
At view target image；
Figure 12 is the sighting target schematic diagram that one embodiment of the invention uses；
Figure 13 is the sighting target schematic diagram that one embodiment of the invention uses；
In figure: 11- liquid crystal micro display, 12- eyepiece optical system, 13- lens barrel, 14- spacer ring, 15- pressing ring, 16- pad
Piece, 17- shell, 18- positioning mechanism, 19- reverse-flighted screw, 20- adjust idler wheel, 21- fixed frame, 22- sliding rail, the adjusting of 23- interpupillary distance
Mechanism, 24- eyeball, the 25- virtual image, 26- interpupillary adjustment mechanism.
Specific embodiment
A specific embodiment of the invention is described with reference to the accompanying drawing.
As shown in Figure 1, the dynamic visual acuity detection device that one embodiment of the invention provides includes video eyeshade 101, feeds back and adopt
Collect module 102, computer 103 and the application software 104 run thereon.
Fig. 2 is the structural schematic diagram for the video eyeshade 101 that the present invention one is implemented in the dynamic visual acuity detection device provided.Institute
Stating video eyeshade includes being respectively used to left and right two eyes, two identical virtual view target optical display modules.It is described
It is virtual to be configured depending on target optical display module to show the virtual view target image for visual stimulus generated by application software, packet
Include miniature image source unit and projecting optical unit.
As shown in Figures 3 to 5, in the present embodiment, the microdrawing image source of the virtual view target optical display module
Submodule can be for for showing the liquid crystal micro display 11 of the virtual view target image；The projection optics submodule includes
The eyepiece optical system 12 being made of multiple lens, the eyepiece optical system 12 are set in lens barrel 13, and by spacer ring 14,
Pressing ring 15 and gasket 16 are fixed, as shown in Figure 3 and Figure 5.
It is each described virtual depending on being by 13 He of lens barrel in target optical display module according to optical design requirements
Two spacer rings 14 accurately combine the eyepiece optical system 12 and the liquid crystal micro display 11.It is described
The virtual liquid crystal micro that will be used to show the virtual view target image using virtual optics technology depending on target optical display module
Display 11 is placed within eyepiece focus, generates a virtual image, and the size of image distance and picture is not limited by instrument size, is utilized
Object distance variation or eyepiece focal length variation can make virtual image image distance meet pre-provisioning request.
Interpupillary adjustment mechanism 26 is used to adjust the interpupillary distance of the eyepiece optical system 12.As shown in Fig. 4 (a) and Fig. 4 (b),
The interpupillary adjustment mechanism 26 includes (left and right rotation) reverse-flighted screw 19, adjustment idler wheel 20, fixed frame 21 and sliding rail 22.Pass through tune
The whole adjustment idler wheel 20 that the video eyeshade hull outside is arranged in adjusts the interpupillary distance of the eyepiece optical system 12, this hair
The interpupillary distance adjusting range of the video eyeshade of bright offer is 58mm-70mm, by adjusting interpupillary distance and quilt so that the video eyeshade
The interpupillary distance of survey person is adapted to.
Optical system of the invention can be direct viewing type, as shown in fig. 6, the liquid crystal micro is aobvious by taking one eye eyeball as an example
Show device 11 by the eyepiece optical system 12 in the front for being detected personnel's eyeball 24, and it is rectangular on the ground of pseudo range Z
At a virtual image 25, the as described virtual view target image.
In one embodiment of the invention, it is described it is virtual regard the liquid crystal micro display 11 that target optical display module uses as
0.61 " high-resolution OLED colour liquid crystal display device, pixel number are 800 × 600, using transmission-type virtual image, observe visual field
Angle is 60 °.The shell 17 of the video eyeshade is made of the shell that plastic uptake shapes, and is divide into upper part and lower part, and be combined into
One entirety, is fixed in the rack of the video eyeshade by connecting components such as screws, the overall weight of the video eyeshade
About 200g.The curl of 17 front of shell and cheek contacts is complete using soft rubber and plastic packet splicing, to guarantee to detect when institute
State video eyeshade can with cheek is intact is bonded and close opaque.
The feedback collection module 102 configures to acquire measured to the feedback data of view target variation.
In one embodiment of the invention, the feedback collection module can be a poke rod, with upper, upper right, the right side, the right side
Under, under, lower-left, a left side, the assigned direction of upper left eight.In this way when measured judge regard target motion conditions or opening direction
Afterwards, this poke rod directly is stirred to the direction, measured is facilitated to use.
In addition, there can also be button on the poke rod, configure to open or close the dynamic visual acuity test macro.
It will switch and integrated on one part using function, it is compact-sized, it occupies little space, and measured is facilitated to operate.
In another embodiment of the present invention, the feedback collection module can be a touch screen, and measured is in touch panel
On make the directive slide of tool, such as slide from top to bottom, sliding etc. from left to right.In this way when measured judges
Depending on target motion conditions or opening direction after, directly make slide to the direction.For example, with reference to Fig. 7, this hair
In a bright embodiment, the touch screen shows various possible direction points in a manner of nine grids, sees view target by measured
After provide feed back and recorded.
The computer 103 include computer store and display system, Peripheral Interface, and with the application software 104
The application circuit and electrical component matched.The Peripheral Interface is general-purpose interface, convenient for the update upgrading of equipment in the future.It is described
Computer can be desktop computer, portable notebook or IPHONE, the intelligent terminals such as IPAD.
The application software 104 realizes the setting to various stimulation parameters and the setting to parallax adjustment, and to feedback
Data are handled.Parallax adjustment module, virtual view target generation module, feedback processing are realized by running the application software
Module.Wherein, the parallax adjustment module, configuration virtually regard target image to adjust right and left eyes according to required space or depth perception
Parallax；It is described it is virtual regard target generation module configuration come simultaneously as right and left eyes respectively generate have the parallax virtual view target image
Stimulus signal；The feedback processing modules, configuration virtually regard target image change to compare feedback data and reality, are compared
As a result.
Fig. 8 is the schematic diagram of parallax adjustment module.Wherein: Cx leftAnd Cx rightIndicate that the picture on liquid crystal micro display is main
Point；OlAnd OrIndicate left and right eyeball；T indicates the interpupillary distance of two eyes；What f was expressed as being imaged on eyeball to liquid crystal micro display screen
Distance；xlIndicate abscissa of the virtual view target image P on the corresponding liquid crystal micro display of left eye；xrIndicate virtual view target figure
As abscissa of the P on the corresponding liquid crystal micro display of right eye.
D=xl-xr, indicate view of the right and left eyes between two liquid crystal display images in left and right about virtual view target image P
Difference.
It is available by Similar Principle of Triangle:
It can be released by formula 1, in the case where f and T constant, can virtually regard target image on a left side by adjusting right and left eyes
Parallax on right liquid crystal micro display obtains the space or depth perceptions of needs.
Referring to Fig. 9 and Figure 10, in one embodiment of the invention, it is described it is virtual can be with mark shown in Fig. 9 depending on target generation module
Based on quasi- logarithmic visual acuity chart, the view target image of E word mark style shown in Fig. 10 is generated；In an alternative embodiment of the invention, institute
C word mark style shown in Figure 12 can also be generated based on Lan Shi Landolt's broken ring chart shown in Figure 11 depending on target generation module by stating
View target image, i.e., using technical solution provided in an embodiment of the present invention realize dynamic visual acuity detection.
By taking the view target image of E word mark style as an example, by the parallax adjustment module, the view target generation module with it is described
Virtual view target optical display module combines, by the view target figure for drawing out E word mark style shown in Fig. 10 depending on the simulation of target generation module
As sighting target, corresponding parallax is calculated according to formula 1 according to the requirement of space or depth perception Z by parallax adjustment module, by generating depending on target
Module draws out the view target image shown on the two liquid crystal micro displays in left and right, as shown in figure 11, the virtual view target light
Be shown in the view target image for showing and drawing out on liquid crystal micro display.It should be noted that the liquid crystal micro of left and right two is aobvious
Show and needs while showing, the view target figure that could utilize the parallax of eyes that measured is made to see visual degree Z depending on target image on device
Picture.
After determining space or depth perception Z, in the case where other parameters such as f and T all determine, then parallax d=can get
xl-xr=fT/Z.D is differed to the abscissa of the same picture point on the two liquid crystal micro displays in left and right, can be realized based on standard
The binocular vision of logarithmic visual acuity chart detects.By taking the view target image in Figure 11 as an example, in figure, left figure is the corresponding liquid crystal micro of left eye
The view target image shown on display, right figure are the view target image shown on the corresponding liquid crystal micro display of right eye.For view
The same point on E, such as the vertex in the upper left corner left figure E are marked, abscissa is if it is xl, then the upper left corner corresponding right figure E
Vertex abscissa xr=d+xl, so that human eye can be to see view target E at Z in the depth of field.
It is carried out in dynamic visual acuity detection process to measured, while showing view target on the liquid crystal micro display of left and right
Image keeps the gap of d, energy on the view target image shown on the liquid crystal micro display of left and right between the abscissa of the same point
It is enough so that measured in the depth of field is to see virtual view target image at Z, pass through the feedback that feedback collection module acquires measured.If
Feedback collection module is poke rod, can acquire the direction that the bar that is struck is struck；If feedback collection module is touch liquid crystal
Screen, can acquire the direction that measured slides on touch screen.
In practical application, it can need to generate corresponding virtual view target by virtually view target generation module according to actually detected
Image and the movement velocity and motion mode that the virtual view target image is set.
It is rotary mode, straight line pattern or diameter depth mode that the display pattern depending on target image, which can be set,.The view
It is to be shown by changing the virtual same point depending on target image in the two liquid crystal micro displays in left and right that the diameter depth mode of target image, which is shown,
The poor d of the abscissa of image on device virtually regards the space or depth perception of target image to adjust, and allows and virtually does diameter depending on target image
The movement of deep mode.
No matter virtually view target image is shown with which kind of mode, can be controlled to the virtual dynamic change depending on target image
System:
(1) rotary mode:
The rotation speed of the virtual view target image of control, direction of rotation are constant in the sighting target rotation speed of virtually view target image
In the case where, the sighting target of different virtual view target images can be shown according to sequence from small to large or from big to small, be used to
Determine the minimum sighting target that subject can be seen；Or when the virtual sighting target size depending on target image determines, it is constantly changing virtual view
The rotation speed of the sighting target of target image, such as can be from slowly to fast or near slow, so as to determine that measured can see clearly
Virtual view target image sighting target prestissimo.
(2) straight line pattern:
The movement velocity of the virtual view target image of control, the direction of motion are constant in the sighting target movement velocity of virtually view target image
In the case where, the sighting target of virtual view target image of different sizes can be shown according to sequence from small to large or from big to small,
For determining to be tested the minimum sighting target that can be seen；Or when the virtual sighting target size depending on target image determines, it is constantly changing void
The movement velocity of the sighting target of quasi- view target image, such as can be from slowly to fast or near slow, so as to determine measured's energy
The prestissimo of the sighting target for the virtual view target image seen clearly.
(3) diameter depth mode:
According to formula 1, the speed in the virtual diameter depth direction for regarding target image exists by adjusting the same point of virtual view target image
The pace of change of the poor d of the abscissa of the image on two liquid crystal micro displays is controlled to realize.As d and space or depth perception Z
It is inversely proportional, as large radius-depth Z to be increased, is reduced by d；As diameter depth Z to be reduced, just increase d.
The virtual movement velocity that diameter depth mode is done depending on the sighting target of target image can be adjusted by adjusting the pace of change of d.?
In the case that the movement velocity of diameter depth mode is constant, it can be shown according to sequence from small to large or from big to small of different sizes
Virtual view target image sighting target, for determining the minimum sighting target that can see of subject；Or it is big in the sighting target of virtually view target image
When small determining, the movement velocity being constantly changing under the sighting target diameter depth mode of virtual view target image constantly changes the variation speed of d
Degree, such as can be from slowly to fast or near slow, so as to determine the sighting target of virtual view target image that measured can see clearly
Most fast movement velocity under diameter depth mode.
In the embodiment of the present invention, measured is acquired by feedback collection module and sees the anti-of virtual view target image progress
Feedback, the feedback include on the direction stirred of poke rod or touch screen the direction of measured's sliding or measured pass through other
The feedback data that mode provides.
After collecting the feedback data of measured, feedback processing is generated feedback data with virtual depending on target generation module
Data be compared, to provide comparison result.The dynamic visual acuity of measured can be provided according to comparison result comprehensive
Evaluation.
Dynamic visual acuity detection device provided in an embodiment of the present invention can realize the dynamic of various modes by video eyeshade
Eyesight detection, device structure are simple, it is ensured that the various views in reality are simulated in the case where not interfered by ambient light conditions
Stimulation is felt, to obtain more accurate dynamic visual acuity testing result.
The preferred embodiments of the disclosure and embodiment are explained in detail above in conjunction with attached drawing, but it is of the invention
It is not limited to the above embodiment and embodiment can also not take off within the knowledge of those skilled in the art
It is made a variety of changes under the premise of from present inventive concept.
Claims (7)
1. a kind of dynamic visual acuity detection device, it is characterised in that: including
Parallax adjustment module configures to adjust the parallax that right and left eyes virtually regard target image according to required space or depth perception；
Virtual view target generation module is configured to generate the virtual view target image with the parallax respectively simultaneously for right and left eyes
Stimulus signal；
Virtual view target optical display module, configures to receive the stimulus signal and show the virtual view target image；
Feedback collection module configures to acquire measured to the feedback data of virtual view target image change；
Feedback processing modules configure to receive and compare the actual change of feedback data and the virtual view target image, obtain ratio
Relatively result.
2. dynamic visual acuity detection device according to claim 1, it is characterised in that: the virtual view target image is with diameter depth side
Formula movement.
3. dynamic visual acuity detection device according to claim 1, it is characterised in that: the feedback collection module includes touch-control
Screen.
4. dynamic visual acuity detection device according to claim 1 or 2, it is characterised in that: the virtual view target optics is shown
Module includes microdrawing image source submodule and projection optics submodule.
5. dynamic visual acuity detection device according to claim 4, it is characterised in that: the microdrawing image source submodule includes
For showing the liquid crystal micro display of the virtual view target image, the projection optics submodule includes being made of multiple lens
Eyepiece optics unit, the eyepiece optics unit is set in lens barrel, and is fixed by spacer ring, pressing ring and gasket.
6. dynamic visual acuity detection device according to claim 5, it is characterised in that: the virtual view target optical display module
Further include the interpupillary adjustment mechanism for adjusting eyepiece optics unit interpupillary distance described in the virtual view target optical display module, leads to
It overregulates so that the interpupillary distance of the video eyeshade is adapted to the interpupillary distance of measured.
7. dynamic visual acuity detection device according to claim 1, it is characterised in that: it is described it is virtual depending on target image include eyesight
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| CN201810120484.1A CN109077701A (en) | 2018-02-05 | 2018-02-05 | A kind of dynamic visual acuity detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810120484.1A CN109077701A (en) | 2018-02-05 | 2018-02-05 | A kind of dynamic visual acuity detection device |
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| CN109077701A true CN109077701A (en) | 2018-12-25 |
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| CN201810120484.1A Pending CN109077701A (en) | 2018-02-05 | 2018-02-05 | A kind of dynamic visual acuity detection device |
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| CN109497929A (en) * | 2018-12-28 | 2019-03-22 | 杭州精飞光学仪器制造有限公司 | Eyesight measurement method, information control center equipment and computer storage medium |
| CN112806952A (en) * | 2020-12-31 | 2021-05-18 | 北京大学第三医院（北京大学第三临床医学院） | Dynamic defocusing curve testing system and testing method thereof |
| CN115998241A (en) * | 2023-03-29 | 2023-04-25 | 之江实验室 | Visual detection method, visual detection device, electronic equipment and visual detection system |
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Application publication date: 20181225 |