CN102283763B - Binoculus laser interference fringe visual perception study training instrument - Google Patents
Binoculus laser interference fringe visual perception study training instrument Download PDFInfo
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Abstract
A binoculus laser interference fringe visual perception study training instrument comprises a light source, an optical system, an interference fringe frequency control device, an interference fringe contrast control device, an interactive device and a computer. Two paths of the same light are obtained after coherent lights sent out by the light source pass the optical system, and are respectively sent to the left and the right eyes of a human test subject, wherein each path of light respectively comprises two beams of coherent light and one beam of non-coherent back light, both the two beams of coherent light of each path are converged at the pupil, the produced two light points are interfered with each other, and the same interference fringes are generated at the left and the right eye grounds. The interference fringe frequency control device adjusts the converged space of the two beams of coherent light of each path at the pupil, and accordingly, the frequency of the interference fringes is adjusted; and the interference fringe contrast control device is used for adjusting the overall contrast of the interference fringe of each path. The binoculus laser interference fringe visual perception study training instrument can directly avoid the influence of human eye optical system aberration and diffraction functions, and does not need complicated aberration measurement and correction devices; and the binoculus laser interference fringe visual perception study training instrument is more approximate to the daily eye using state of human beings; and the visual function is more effectively improved.
Description
Technical field
The present invention relates to a kind of eyes laser interferencefringes visual perception learning training appearance.
Background technology
Perceptual learning definition is early provided by Gibson (1953), and promptly perceptual learning shows as the raising of information extraction ability from external environment, and this study is that the experimenter practises and the physiological maturity results of interaction.Find so far the significant progress that the inherent mechanism of perceptual learning and related application all obtain first from Volkman in 1858.Though its essence is also arrived unified understanding far away, the fact that research is at present admitted is that perceptual learning improves the ability that individuality obtains external information on the one hand, makes the long period go up the behavior decision-making mechanism on the other hand and changes and improve.Its physiological foundation is the function plasticity in brain fundamental sensation zone.
Visual perception study is in forward position that becomes cognitive neuroscience over the past two decades and hot issue.People also generally believe early stage visual cortex before 20 years, and particularly elementary cortex only just has plasticity period at infant, after growing up just not in plastic (Marr, D.Vision, San Francisco:Freeman, 1982).But existing in recent years many psychophysics experiments show; Even if the adult also can show raising (Sasaki et.al in a lot of visual perception learning tasks; Advances in visual perceptual learning and plasticity, 2010).Special, the amblyopia patient that grows up can improve its contrast sensitivity and vision (Zhou YF greatly through after the study; Huang CB, Xu PJ, Tao LM; Qiu ZP; Li XR and Lu ZL, Perceptual Learning Improves Contrast Sensitivity and Visual Acuity in Adults with Anisometropic Amblyopia.Vision Research, 46 (5): 739-750; 2006), explain that amblyopia patient's optic nerve system that grows up still has potential plasticity.This all has positive meaning for the raising aspect of amblyopia treatment down to normal person's vision of being grown up.
Leading in the human vision initial development by empirical study.The vision of ewborn infant is followed big object, and bigger baby just can notice the minutia of wisp or object, and vision increased a frequency (c/deg, every degree of cycle) in average every month in postnatal 20 months.Therefore, meticulous effective stimulation has been played crucial effects in the growth course of vision to the optic nerve system.The external image information that the human visual system accepted all is that the optical system through eyeball is received by retina, so the performance of eyeball optics system has become to influence the key factor of visual function.Document (D.R.Williams&H.Hofer (2003) .Formation and Acquisition of the Retinal Image.In:J.S.W.Leo M.Chalupa (Ed.) The Visual Neurosciences.The MIT Press; Cambridge; Massachusetts; London England.) shows that the eyeball optics system receives diffraction, cornea and the lenticular aberration of pupil, the influence of various factors such as scattering of aqueous humor.Except that the pupil size, aberration becomes the direct factor of decision retina picture element.Because human eye aberration no doubt exists, this must cause the reduction of retina picture element, and then becomes the possible factor that vision can't reach capacity in growth course.In addition, aberration also is the origin cause of formation of some type amblyopia (refractive amblyopia, anisometropic amblyopia).
One can be divided into low order portion and high order part human eye aberration, and existing visual perception study only adopts traditional eyeglass to correct the human eye low order aberration usually, but under the combined effect of human eye higher order aberratons and diffraction, can not on retina, produce enough distinct image.Owing to receive the restriction of clear picture degree, simple visual perception study is limited to the improvement amplitude of human eye visual function.
A kind of human eye adaptive optics visual perception learning training method and instrument for training (being respectively simple eye and eyes) are disclosed in one Chinese patent application numbers 200910262470.4 and 200910262471.9.Based on adaptive optical technique, the wave front aberration of opthalmic optics system can measured and correct to this instrument for training, makes the opthalmic optics system near diffraction limit.On this basis, use this training method and carry out the purpose that the visual perception learning training can reach raising visual perception learning training effect and human eye visual function.Yet there is disadvantage in this instrument for training: (1) but still can't overcome the influence of diffraction though utilize adaptive optical technique can correct human eyes wave-front optical aberration.Under high spatial frequency, this influence becomes particularly evident.(2) Optotype presenting apparatus in this invention one utilize CRT monitor, business projector, OLED etc. because the restriction of the resolution capability of these equipment own, the stimulation of looking that is difficult to produce high spatial frequency.(3) rectification effect of aberration depends on the measurement and the control corresponding method of aberration in this invention, because the factors such as dynamic of human eyes wave-front optical aberration cause this measurement and control mode very complicated.(4) the core devices wavefront appliance of instrument for training is a kind of optics of precision in this invention, and processing technique is complicated, and cost is high.These factors have all limited promoting the use of of adaptive optics visual perception learning training appearance.
Summary of the invention
Technology of the present invention is dealt with problems: the deficiency that overcomes prior art; A kind of eyes laser interferencefringes visual perception learning training appearance is provided; Utilize laser interferance method at the bottom of human eye, to produce the sinusoidal interference striped of different frequency and contrast, can avoid the influence that opthalmic optics's aberration and diffraction are caused, more meticulous stimulation is projeced into the optical fundus; Simple in structure, be easy to realize.In addition, this instrument for training has two-way interference fringe export structure, can train eyes simultaneously, more approaching daily eye condition.
Technical solution of the present invention: a kind of eyes laser interferencefringes visual perception learning training appearance; Comprise light source (A), optical system and control system; Light source (A) adopts He-Ne LASER Light Source (1), and optical system comprises first beam splitter (2), second beam splitter (3), the first space filtering battery of lens (5), first reflecting mirror (6), first lens (7), the second space filtering battery of lens (9), second reflecting mirror (10), second lens (11), the 3rd reflecting mirror (13), the 3rd lens (14), the 4th reflecting mirror (15), the 4th lens (16), the 3rd beam splitter (17), the 4th beam splitter (18), first diaphragm (19), the 4th beam splitter (20), first clouded glass (22), first expanded beam lens group (23), the 5th reflecting mirror (24), second diaphragm (25), the 5th beam splitter (26), the 5th lens (27), second clouded glass (29), second expanded beam lens group (30), the 6th reflecting mirror (31), the 3rd diaphragm (32), the 6th beam splitter (33), the 4th diaphragm (34), the 7th reflecting mirror (35), the 8th reflecting mirror (36) and the 6th lens (37); Control system comprises computer (E), interference fringe spatial frequency adjusting device (D) and interference fringe contrast control device (C); Interference fringe spatial frequency adjusting device (D) comprise motor (39) and with the human eye conjugated prism in (38R and 38L) pupil place (12), interference fringe contrast control device (C) is made up of first photoswitch (4), second photoswitch (8), the 3rd photoswitch (21) and the 4th photoswitch (28); The light that is sent by He-Ne LASER Light Source (1) is divided into two-way through first beam splitter (2); First via light is further divided into symmetric two-way through the 4th beam splitter (20), and the wherein symmetric first via is projeced into the left eye (38L) of experimenter (H) respectively by the 5th lens (27) as incoherent bias light incident through the 3rd photoswitch (21), first clouded glass (22), first expanded beam lens group (23), the 5th reflecting mirror (24), second diaphragm (25), the 5th beam splitter (26); Symmetric the second the tunnel is projeced into the right eye (38R) of experimenter (H) respectively by the 6th lens (37) as incoherent bias light incident through the 4th photoswitch (28), second clouded glass (29), second expanded beam lens group (30), the 6th reflecting mirror (31), the 3rd diaphragm (32), the 6th beam splitter (33); The second road light is divided into symmetric two-way through second beam splitter (3); Symmetric first via light images in an incidence surface of prism (12) respectively through first photoswitch (4), the first space filtering battery of lens (5), first reflecting mirror (6), first lens (7), then this symmetric first via light again through the 3rd reflecting mirror (13), the 3rd lens (14) to the 3rd beam splitter (17); Symmetric the second road light images in another incidence surface of prism (12) respectively through second photoswitch (8), the second space filtering battery of lens (9), second reflecting mirror (10), second lens (11), then this symmetric the second road light again through the 4th reflecting mirror (15), the 4th lens (16) to the 3rd beam splitter (17); Symmetric two-way light is after the 3rd beam splitter (17) is located to converge; Be divided into symmetric two-way through the 4th beam splitter (18); The wherein symmetric first via is converged at left eye (38L) the pupil place of experimenter (H) by the 5th lens (27) as two bundle coherent lights through first diaphragm (19), the 4th beam splitter (26); Two coherent light point sources interfere at experimenter (H) left eye (38L) pupil place, and produce the interference fringe of certain space frequency and contrast on the left eye optical fundus; Symmetric the second road warp the 4th diaphragm (34), the 6th beam splitter (33), the 7th reflecting mirror (35) and the 8th reflecting mirror (36) are converged at right eye (38R) the pupil place of experimenter (H) by the 6th lens (37) as two bundle coherent lights; Two coherent light point sources interfere at right eye (38R) the pupil place of experimenter (H), and produce the interference fringe of certain space frequency and contrast on the right eye optical fundus; Said computer (E) sends commands for controlling motor (39) and drives prism (12) rotation, and two coherent point space between light sources distances of regulating the pupil place through the rotation of prism (12), thus the spatial frequency of change interference fringe; Said computer (E) is realized the adjusting of interference fringe contrast through first photoswitch (4), second photoswitch (8), the 3rd photoswitch (21) and the 4th photoswitch (28) of control; Wherein control the 3rd photoswitch (21) and the 4th photoswitch (28) and produce rectangular pulse, and realize the incoherent bias light brightness regulation of two-way through the modulation rate of control rectangular pulse; Control first photoswitch (4) and second photoswitch (8) and produce synchronous rectangular light pulse respectively, and open eclipsed time realization in each cycle to two-way coherent fringe contrast adjustment through changing with certain modulation rate.
The present invention's advantage compared with prior art is:
(1) the present invention utilizes the laser interferometry principle, can directly avoid the influence of opthalmic optics's system aberration and diffraction, need not complicated aberration measurement and corrects device, and is simple in structure, is easy to realize.In addition, the present invention can produce the interference fringe of high spatial frequency and not receive the restriction of hardware itself.Therefore can more meticulous visual stimulus be projeced into human eye, make the experimenter can more effectively carry out visual perception study, to improve visual function.
(2) contrast of the interference fringe among the present invention can utilize computer to control automatically, and satisfies the required precision of contrast adjustment in the visual perception learning training method.
(3) coherent source of the present invention is produced by the direct beam splitting of laser, and incoherent light is produced through clouded glass by coherent light, has guaranteed interference fringe and incoherent bias light consistency of colour.
(4) the interference fringe frequency regulation arrangement is that symmetry is regulated for the adjusting of point source spacing, can satisfy Stiles-Crawford maximization condition, guarantees the two relevant strong concordance of light beam light.
(5) can produce identical two-way light among the present invention and simultaneously eyes trained, more approach people's daily eye condition.
Description of drawings
Fig. 1 is a composition structural representation of the present invention;
Fig. 2 is an optical system structure sketch map of the present invention;
Fig. 3 is a control system structural representation of the present invention;
Fig. 4 is an interference fringe frequency regulation arrangement sketch map of the present invention;
Fig. 5 is the sketch map of interference fringe contrast ultimate principle of the present invention;
Fig. 6 is the sketch map of coherent fringe contrast adjustment principle of the present invention.
The specific embodiment
As shown in Figure 1, schematic diagram of the present invention comprises light source A, optical system B, interference fringe contrast control device C, interference fringe frequency regulation arrangement D, computer E and interactive device F.The coherent light that light source A sends obtains the right and left eyes that the identical light of two-way incides experimenter H respectively behind optical system B; Wherein every road light comprises two bundle coherent light and a branch of incoherent bias lights respectively; Two bundle coherent lights all converge at left eye (or right eye) pupil place; Center of focus is apart from being d, and consequent two point sources interfere and produce interference fringe on the optical fundus, and the coherent fringe in the experimenter H right and left eyes produces consciousness image G after experimenter's brain is handled.Interference fringe frequency regulation arrangement D can regulate the spacing d that two bundle coherent lights are assembled at the pupil place, thereby regulates the frequency of interference fringe.Interference fringe contrast control device C is used to regulate the overall contrast of interference fringe.Interactive device F can also provide corresponding sound feedback for experimenter H with the test result input computer E of experimenter H.Computer E, and can be to comprising light source A, interference frequencies adjusting device D, interference fringe contrast control device C and interactive device F control automatically.
Computer E sends instruction and gives interference fringe contrast control device C and interference fringe frequency regulation arrangement D, and the interference fringe that output has certain frequency and contrast is projeced into experimenter H optical fundus.Experimenter H judges that according to visual perception training method dependency rule its result is sent to computer E through interactive device F, and sends the respective feedback signal by computer E.Computer E resets fringe contrast adjusting device C and striped frequency regulation arrangement D according to perceptual training method dependency rule, and the interference fringe that output has new frequency and contrast is projeced into experimenter H optical fundus.The circulation said process is until reaching visual perception learning training method end condition.The basic feature of this instrument for training is to utilize the laser interferometry principle, can directly avoid the influence of opthalmic optics's system aberration and diffraction, need not complicated aberration measurement and corrects device.Said instrument for training can produce the interference fringe of high spatial frequency and not receive the restriction of hardware itself.In addition, said instrument for training can produce identical two-way light and simultaneously eyes trained, and more approaches people's daily eye condition.Therefore, this instrument for training can be projeced into human eye with more meticulous visual stimulus, makes the experimenter can under the stereopsis vision state, carry out visual perception study, more effectively improves visual function.
Like Fig. 1,2, shown in 3; A kind of eyes laser interferencefringes visual perception learning training appearance of the present invention is divided into two-way by the light that He-Ne LASER Light Source 1 sends through first beam splitter 2; First via light is further divided into symmetric two-way through the 4th beam splitter 20, and the wherein symmetric first via is projeced into the left eye 38L of experimenter H respectively by the 5th lens 27 as incoherent bias light incident through the 3rd photoswitch 21, first clouded glass 22, first expanded beam lens group 23, the 5th reflecting mirror 24, second diaphragm 25, the 5th beam splitter 26; Symmetric the second the tunnel is projeced into the right eye 38R of experimenter H respectively by the 6th lens 37 as incoherent bias light incident through the 4th photoswitch 28, second clouded glass 29, second expanded beam lens group 30, the 6th reflecting mirror 31, the 3rd diaphragm 32, the 6th beam splitter 33; The second road light is divided into symmetric two-way through second beam splitter 3; Symmetric first via light images in an incidence surface of prism 12 respectively through first photoswitch 4, the first space filtering battery of lens 5, first reflecting mirror 6, first lens 7, this symmetric first via light is again through the 3rd reflecting mirror 13, the 3rd lens 14 to the 3rd beam splitters 17 then; Symmetric the second road light images in another incidence surface of prism 12 respectively through second photoswitch 8, the second space filtering battery of lens 9, second reflecting mirror 10, second lens 11, this symmetric the second road light is again through the 4th reflecting mirror 15, the 4th lens 16 to the 3rd beam splitters 17 then; Symmetric two-way light is after the 3rd beam splitter 17 places converge; Be divided into symmetric two-way through the 4th beam splitter 18; The wherein symmetric first via is converged at the left eye 38L pupil place of experimenter H by the 5th lens 27 as two bundle coherent lights through first diaphragm 19, the 4th beam splitter 26; Two coherent light point sources interfere at experimenter H left eye 38L pupil place, and produce the interference fringe of certain space frequency and contrast on the left eye optical fundus; Symmetric the second the tunnel is converged at the right eye 38R pupil place of experimenter H through the 4th diaphragm 34, the 6th beam splitter 33, the 7th reflecting mirror 35 and the 8th reflecting mirror 36 by the 6th lens 37 as two bundle coherent lights; Two coherent light point sources interfere at the right eye 38R of experimenter H pupil place, and produce the interference fringe of certain space frequency and contrast on the right eye optical fundus; Said computer E sends commands for controlling motor 39 and drives prisms 12 rotations, and two coherent point space between light sources distances of regulating the pupil place through the rotation of prism 12, thereby changes the spatial frequency of interference fringe; First photoswitch 4 of said computer E through control, second photoswitch 8, the 3rd photoswitch 21 and the 4th photoswitch 28 are realized the adjusting of interference fringe contrast; Wherein control the 3rd photoswitch 21 and the 4th photoswitch 28 generation rectangular pulses, and realize the incoherent bias light brightness regulation of two-way through the modulation rate of control rectangular pulse; Control first photoswitch 4 and second photoswitch 8 and produce synchronous rectangular light pulse respectively, and open eclipsed time realization in each cycle to two-way coherent fringe contrast adjustment through changing with certain modulation rate.
As shown in Figure 3, being embodied as of control system of the present invention: the control of computer E mainly contains step 1 and two parts of step 2,
Step 1: relate generally to the adjusting of interference fringe spatial frequency.In the time of need resetting when original state (or directly set) optical fundus interference fringe frequency when the requirement that receives visual perception learning training method; Computer E sends commands for controlling motor 39 and drives prism 12 rotations; And regulate the point source spacing d at pupil place, thereby change the spatial frequency of interference fringe through the rotation of prism 12.
Fig. 4 is the sketch map of the striped frequency regulation arrangement of explanation instrument for training shown in Figure 1.Wherein 4 (a) are the overall diagram of prism 12, and coordinate axes is xyz, and the center of circle is o.Wherein center of circle o is positioned at the geometric center of prism 12.4 (b) vertical view, the z direction of principal axis.4 (c) are front view, the x direction of principal axis.As shown in Figure 4, two light beam A B and EF in same horizontal plane reverse and ground in a certain angle entrance prism 12 about two faces.Suppose that prism 12 thickness are a, prolong x axle anglec of rotation α counterclockwise, the refractive index of glass is n.Can know i by geometrical relationship
1=α, wherein i
1Be light beam A B (or light beam EF) and prismatical angle of incidence; Simultaneous equations (1) can solve light beam A B and light beam EF (regulates because two light beams are symmetry at the axial translation distance 2h of z; Light beam A B or light beam EF are h at z direction of principal axis translation distance, so the integral translation distance is 2h).Hence one can see that light beam along the distance of z direction of principal axis translation by it to prismatical angle of incidence i
1, prism 12 the decision of width a and refractive index n.Preferably; Prism 12 is a cuboid, and thickness a is 25 millimeters, and material is crown glass (K9; N=1.51); Along counterclockwise every rotation 1 degree of x axle, pupil 26 places point source spacing d change amount is about the 0.3M millimeter, and wherein M is that battery of lens is the horizontal enlargement ratio of the 3rd lens 14 and the 5th lens 27 (or the 4th lens 14 and the 5th lens 27).Preferably, first lens 7 and second lens 11 image in two-beam the center of prism 12 respectively, and should place and human eye 38L (or 38R) pupil place conjugation, guarantee here adjusting and the concordance at human eye pupil place.More preferably, 12 two incidence surfaces of prism are plated anti-reflection film to reduce the interference that forms owing to veiling glare.
I wherein
2Be the refraction angle in the prism, i
3Be the extended line of incident ray and the angle of refracted ray, b is the geometric distance that light AB or EF propagate in prism, n
1And n
2Be respectively light in glass and airborne refractive index, one ground n
1=n, n
2=1.
The symmetry of light channel structure guarantee point space between light sources d shown in Figure 2 is regulated, and makes it can satisfy Stiles-Crawford maximization condition.
Incidentally, the Stiles-Crawford effect is in order to expression retinal photoreceptor directional sensitivity.The light of equality strength incides retina in any side from the 4mm of pupil center, and its relative light efficient has only from 1/5th of pupil central authorities incident ray.Therefore, the symmetry of the point source spacing d of pupil place regulates that can to guarantee that retina is accepted the intensity of two light sources consistent and most effective, and this is aforesaid Stiles-Crawford maximization condition.
Incidentally, two light intensity are respectively I
1And I
2The coherent point light source light intensity spatial distribution that interfere to produce striped be:
Wherein λ is an optical wavelength, and d is two coherent point space between light sources, and x is a Space Angle distance (angular distance in radians) corresponding on the retina.Adjacent fringe intensity changes a week, and the angle of pairing interference fringe is x=λ/d, and the number of interference fringes (being spatial frequency) at corresponding 1 ° of visual angle is sf=d π/(180 λ).From the above, the variation of interference fringe spatial frequency can be through changing realizing apart from d between two coherent point light sources.
Step 2: relate generally to the adjusting of interference fringe contrast.The adjusting of fringe contrast is mainly realized by computer-controlled first photoswitch 4, second photoswitch 8, the 3rd photoswitch 21 and the 4th photoswitch 28.
Fig. 5 is the sketch map of the fringe contrast ultimate principle of explanation instrument for training shown in Figure 1, and contrast is defined as: C=Δ I
Coh/ (I
Coh+ I
Inc), Δ I wherein
CohBe the sinusoidal amplitude of variation of striped brightness, I
CohBe the space average brightness of coherent light in whole visual field, I
IncBe the space average brightness of incoherent light in whole visual field.I
Coh+ I
IncKeep constant, through to Δ I
CohAdjusting realize fringe contrast from 0 to I
Coh/ (I
Coh+ I
Inc) variation.
(AOM4 and AOM8 Fig. 6) are used to regulate the variation of coherent fringe contrast for first photoswitch 4 and second photoswitch 8.Under the situation of not considering incoherent bias light, the coherent fringe contrast may be defined as C=Δ I
Coh/ I
Coh, first photoswitch 4 and second photoswitch 8 are used to produce the square-wave pulse of 400Hz as speed-sensitive switch.In the cycle of 2.5ms, the time that switch is opened is 1ms (modulation rate is far above the flicker fusion frequency of human eye).
Incidentally, when with the lower photostimulation human eye that is interrupted of frequency, can make the people produce the sensation of flash of light.Along with flashing rate increase to a certain value the time, this sensation can disappear, and the substitute is stable fusion photostimulation, flashing rate at this moment is called the flicker fusion frequency of human eye.Under the brightness condition with higher, flicker fusion frequency is between the 50-60 cycle per second, and brightness is then reduced to below 5 cycle per seconds when low.
As shown in Figure 6, the two-beam pulse interferes in stack time t, and t is from the variation the direct corresponding coherent fringe contrast from 0 to 1 of the variation 0 to 1ms.The 3rd photoswitch 21 (or the 4th light opens the light 28) is used to produce the rectangular light pulse, and regulates the brightness I of two-way bias light through the modulation rate that changes pulse
IncThus, the brightness of coherent fringe and incoherent bias light has determined the value of optical fundus fringe contrast jointly.Preferably, first photoswitch 4 in the said instrument for training, second photoswitch 8, the 3rd photoswitch 21 and the 4th photoswitch 28 are selected from acousto-optic modulator, ferroelectric liquid crystal switch.
Adopt among the present invention coherence that 632.8nm helium neon laser 1 sends preferably laser as light source.Coherent source is produced by the direct beam splitting of laser, and incoherent light is produced through first clouded glass 22 (or second clouded glass 29) by coherent light, has guaranteed interference fringe and incoherent bias light consistency of colour.
Interactive device F among the present invention in the instrument for training comprises keypad and audio unit.Keyboard has upper and lower, left and right and definite key that waits, and makes things convenient for the experimenter in test, to judge.Audio unit can provide suitable sound feedback in test or training process.
The present invention does not set forth part in detail and belongs to techniques well known.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that those skilled in the art can carry out various other change, replacement and interpolations under the situation that does not break away from the spirit and scope of the present invention.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited accompanying claims.
Claims (6)
1. eyes laser interferencefringes visual perception learning training appearance; It is characterized in that comprising light source (A), optical system and control system; Light source (A) adopts He-Ne LASER Light Source (1), and optical system comprises first beam splitter (2), second beam splitter (3), the first space filtering battery of lens (5), first reflecting mirror (6), first lens (7), the second space filtering battery of lens (9), second reflecting mirror (10), second lens (11), the 3rd reflecting mirror (13), the 3rd lens (14), the 4th reflecting mirror (15), the 4th lens (16), the 3rd beam splitter (17), the 4th beam splitter (18), first diaphragm (19), the 7th beam splitter (20), first clouded glass (22), first expanded beam lens group (23), the 5th reflecting mirror (24), second diaphragm (25), the 5th beam splitter (26), the 5th lens (27), second clouded glass (29), second expanded beam lens group (30), the 6th reflecting mirror (31), the 3rd diaphragm (32), the 6th beam splitter (33), the 4th diaphragm (34), the 7th reflecting mirror (35), the 8th reflecting mirror (36) and the 6th lens (37); Control system comprises computer (E), interference fringe spatial frequency adjusting device (D) and interference fringe contrast control device (C); Interference fringe spatial frequency adjusting device (D) comprise motor (39) and with the human eye conjugated prism in (38R, 38L) pupil place (12), interference fringe contrast control device (C) is made up of first photoswitch (4), second photoswitch (8), the 3rd photoswitch (21) and the 4th photoswitch (28); The light that is sent by He-Ne LASER Light Source (1) is divided into two-way through first beam splitter (2); First via light is further divided into symmetric two-way through the 7th beam splitter (20), and the wherein symmetric first via is projeced into the left eye (38L) of experimenter (H) respectively by the 5th lens (27) as incoherent bias light incident through the 3rd photoswitch (21), first clouded glass (22), first expanded beam lens group (23), the 5th reflecting mirror (24), second diaphragm (25), the 5th beam splitter (26); Symmetric the second the tunnel is projeced into the right eye (38R) of experimenter (H) respectively by the 6th lens (37) as incoherent bias light incident through the 4th photoswitch (28), second clouded glass (29), second expanded beam lens group (30), the 6th reflecting mirror (31), the 3rd diaphragm (32), the 6th beam splitter (33); The second road light is divided into symmetric two-way through second beam splitter (3); Symmetric first via light images in an incidence surface of prism (12) respectively through first photoswitch (4), the first space filtering battery of lens (5), first reflecting mirror (6), first lens (7), then this symmetric first via light again through the 3rd reflecting mirror (13), the 3rd lens (14) to the 3rd beam splitter (17); Symmetric the second road light images in another incidence surface of prism (12) respectively through second photoswitch (8), the second space filtering battery of lens (9), second reflecting mirror (10), second lens (11), then this symmetric the second road light again through the 4th reflecting mirror (15), the 4th lens (16) to the 3rd beam splitter (17); Symmetric two-way light is after the 3rd beam splitter (17) is located to converge; Be divided into symmetric two-way through the 4th beam splitter (18); The wherein symmetric first via is converged at left eye (38L) the pupil place of experimenter (H) by the 5th lens (27) as two bundle coherent lights through first diaphragm (19), the 5th beam splitter (26); Two coherent light point sources interfere at experimenter (H) left eye (38L) pupil place, and produce the interference fringe of certain space frequency and contrast on the left eye optical fundus; Symmetric the second road warp the 4th diaphragm (34), the 6th beam splitter (33), the 7th reflecting mirror (35) and the 8th reflecting mirror (36) are converged at right eye (38R) the pupil place of experimenter (H) by the 6th lens (37) as two bundle coherent lights; Two coherent light point sources interfere at right eye (38R) the pupil place of experimenter (H), and produce the interference fringe of certain space frequency and contrast on the right eye optical fundus; Said computer (E) sends commands for controlling motor (39) and drives prism (12) rotation, and two coherent light point source spacings of regulating the pupil place through the rotation of prism (12), thus the spatial frequency of change interference fringe; Said computer (E) is realized the adjusting of interference fringe contrast through first photoswitch (4), second photoswitch (8), the 3rd photoswitch (21) and the 4th photoswitch (28) of control; Wherein control the 3rd photoswitch (21) and the 4th photoswitch (28) and produce rectangular pulse, and realize the incoherent bias light brightness regulation of two-way through the modulation rate of control rectangular pulse; Control first photoswitch (4) and second photoswitch (8) and produce synchronous rectangular light pulse respectively, and open eclipsed time realization in each cycle to two-way coherent fringe contrast adjustment through changing with certain modulation rate.
2. eyes laser interferencefringes visual perception learning training appearance according to claim 1 is characterized in that: said He-Ne LASER Light Source (1) is the He-Ne LASER Light Source of 632.8nm for wavelength.
3. eyes laser interferencefringes visual perception learning training appearance according to claim 1; It is characterized in that: said the second road light is divided into symmetric two-way through second beam splitter (3); Symmetric first via light images in the center of (12) incidence surfaces of prism respectively through first photoswitch (4), the first space filtering battery of lens (5), first reflecting mirror (6), first lens (7); And this center and human eye (38L, 38R) pupil place conjugation, then this symmetric first via light again through the 3rd reflecting mirror (13), the 3rd lens (14) to the 3rd beam splitter (17); Symmetric the second road light images in the center of another incidence surface of prism (12) respectively through second photoswitch (8), the second space filtering battery of lens (9), second reflecting mirror (10), second lens (11); And the center of this another incidence surface and human eye (38R, 38L) pupil place conjugation guarantees here adjusting and the concordance at human eye pupil place.
4. according to claim 1 or 3 described eyes laser interferencefringes visual perception learning training appearance, it is characterized in that: (12) two incidence surfaces of said prism plate anti-reflection film to reduce the interference that forms owing to veiling glare.
5. eyes laser interferencefringes visual perception learning training appearance according to claim 1 is characterized in that: said first photoswitch (4), second photoswitch (8), the 3rd photoswitch (21) and the 4th photoswitch (28) are acousto-optic modulator or ferroelectric liquid crystal switch.
6. eyes laser interferencefringes visual perception learning training appearance according to claim 1; It is characterized in that: between said computer (E) and experimenter (H), increase interactive device (F); Said interactive device; Comprise keypad and sound device, can be convenient to the experimenter and test and train, and make the experimenter obtain corresponding sound feedback to computer (E).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110197789 CN102283763B (en) | 2011-07-15 | 2011-07-15 | Binoculus laser interference fringe visual perception study training instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110197789 CN102283763B (en) | 2011-07-15 | 2011-07-15 | Binoculus laser interference fringe visual perception study training instrument |
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| Publication Number | Publication Date |
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| CN102283763A CN102283763A (en) | 2011-12-21 |
| CN102283763B true CN102283763B (en) | 2012-12-19 |
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| CN101947157B (en) * | 2009-12-18 | 2012-02-15 | 中国科学院光电技术研究所 | Eye self-adaptive optical visual perception learning and training instrument |
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