CN101422355A - Visual target presenting device - Google Patents
Visual target presenting device Download PDFInfo
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- CN101422355A CN101422355A CNA2008101738281A CN200810173828A CN101422355A CN 101422355 A CN101422355 A CN 101422355A CN A2008101738281 A CNA2008101738281 A CN A2008101738281A CN 200810173828 A CN200810173828 A CN 200810173828A CN 101422355 A CN101422355 A CN 101422355A
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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
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Abstract
The present invention provides a visual target presenting device which can reduce the trouble for moving visual line and can alleviate the answer based on the memory of visual target checking. The device comprises the following components: an optical light guiding system which is configured in the frame of device and guides visual target light beam into the checked eye while the optical light guiding system and the checked eye are separated by a presenting window; an up-and-down rotating unit which lead to a beamsplitter to rotate around a rotation axis that traverses the light axis of concave reflector and extends along the left-and-right direction; a mask selecting unit which inputs the mask slection signal possessed by the mask plate; and a control unit which determines a rotation angle alpha for rotating the beamsplitter for causing that the visual target covered with single-line transverse mask is in a visual line with an approximate same height of checked eye according to the configuration information of visual target covered with single-line transverse mask, and controls the driving of the up-and-down rotating unit according to the determined rotation angle alpha.
Description
Technical field
The present invention relates to tested eye is presented the visual target presenting device of checking sighting target.
Background technology
The known visual target presenting device (for example Japanese kokai publication hei 7-236612 communique, TOHKEMY 2002-200042 communique) that presents the saving spatial mode of checking sighting target from presenting window via concave mirror that in framework, disposes and beam splitter (semi-transparent semi-reflecting lens).In this visual target presenting device, the sighting target plate that is formed with the sighting target picture of regulation is rotated, and checks that sighting target optionally is disposed on the light path, thereby tested eye is presented the inspection sighting target.In addition, in this kind visual target presenting device, the mask of the mask plate by will being formed with horizontal single-row mask etc. optionally is disposed on the light path, can optionally present the part of the sighting target on a plurality of sections that are formed on a sighting target picture.And then, in this device, be provided with and make beam splitter at the driving mechanism that upper and lower rotates up, beam splitter is rotated up at upper and lower according to the height of examinee's eyes, check that sighting target is presented in the substantial middle of the above-below direction that presents window thereby make.
Summary of the invention
By using the technology of Japanese kokai publication hei 7-236612 communique,, check rightly even the height difference of examinee's eyes also can be presented in the central authorities that present window with the inspection sighting target.But, covering mask at sighting target to a picture, under the situation with the horizontal single-row sighting target that presents epimere or hypomere, the position of appearing of the sighting target of epimere or hypomere is presented with the state that relative examinee's sight line position upwards or down has been offset.Under the situation that presents the sighting target that epimere or hypomere has been covered mask, exist the examinee need move up and down the trouble of sight line.In addition, owing to be divided into the position of appearing of epimere, stage casing, hypomere, so exist the examinee to be easy to remember to check the problem of the content of sighting target according to the allocation position of checking sighting target.If remembered to check the content of sighting target according to the configuration of checking sighting target, then the examinee can depend on memory response and check that looking of sighting target recognize state, and can't carry out correct inspection.And then, no matter under the situation of vertically single-row mask, still under the situation of single text mask, all there is problem of the same race.
The present invention finishes in view of the problem points of above-mentioned conventional art, the technical problem that solves is to provide a kind of visual target presenting device, when presenting the inspection sighting target by coverage mask, can alleviate the trouble that moves of sight line, and can alleviate replying based on the memory of checking sighting target.
In order to solve the problems of the technologies described above, the invention is characterized in to possess following such structure.
Visual target presenting device is characterised in that, possess: be disposed in the framework of device and across presenting window imports leaded light optical system from the sighting target light beam to tested eye, this leaded light optical system has: have the sighting target panel that is divided into up and down a plurality of sections and has described the sighting target picture of a plurality of sighting targets on each section, mask plate with the mask that optionally presents a part that is depicted in the sighting target on the above-mentioned sighting target picture, the concave mirror that presents above-mentioned sighting target picture with the inspection distance of stipulating on the optics, and be obliquely installed beam splitter on the optical axis of this concave mirror, make the sighting target light beam towards tested eye by above-mentioned beam splitter and concave mirror; The rotating shaft that extends along left and right directions with the optical axis by above-mentioned concave mirror is the rotary unit up and down that the center makes above-mentioned beam splitter rotation; The mask selected cell of the selection signal of the mask that input aforementioned mask plate is had; And when having imported the selection signal of horizontal single-row mask by the aforementioned mask selected cell, configuration information according to the sighting target that is covered horizontal single-row mask, the anglec of rotation α of the above-mentioned beam splitter of decision rotation is so that be covered on the sight line of roughly sustained height that the sighting target of horizontal single-row mask is positioned at tested eye, and the control unit of the above-mentioned driving of rotary unit up and down being controlled according to this anglec of rotation α that determines.
According to the present invention, when presenting the inspection sighting target by coverage mask, can alleviate the trouble that moves of sight line, and can alleviate replying based on the memory of checking sighting target.
Description of drawings
Fig. 1 is the figure that the outward appearance of apparatus main body is shown.
Fig. 2 is the perspective skeleton diagram during from the framework of right flank finder.
Fig. 3 is the perspective skeleton diagram during from the framework of top view device.
Fig. 4 A is the figure that is shown specifically the sighting target plate.
Fig. 4 B is the figure that is shown specifically mask plate.
Fig. 5 is the figure of the control block diagram of explanation outward appearance of remote controller and visual target presenting device integral body.
Fig. 6 is that explanation is used for the figure that rotation that central authorities at above-below direction present the beam splitter of laterally single-row sighting target drives.
Fig. 7 A is the example of configuration information that is covered the sighting target of horizontal single-row mask (mask that presents horizontal single-row sighting target), is the example of the sighting target pictures of horizontal 3 row * vertical 5 row.
Fig. 7 B is covered horizontal single-row mask and the example of the sighting target picture of the virtual image that presents in the position of checking apart from 5m.
Fig. 8 is that explanation is used for the figure that rotation that central authorities at left and right directions present the beam splitter of vertically single-row sighting target drives.
Fig. 9 A is the example of configuration information that is covered the sighting target of vertical single-row mask (mask that presents vertical single-row sighting target), is the example of the sighting target pictures of horizontal 3 row * vertical 5 row.
Fig. 9 B is covered vertical single-row mask and the example of the sighting target picture of the virtual image that presents in the position of checking apart from 5m.
Figure 10 A is the figure that is present condition that explanation utilizes the sighting target that the horizontal single-row mask of epimere presents, and is the example that in the past installed.
Figure 10 B is the figure that is present condition that explanation utilizes the sighting target that the horizontal single-row mask of epimere presents, and is the example of this device.
Figure 10 C is the figure that is present condition that explanation utilizes the sighting target that the horizontal single-row mask of hypomere presents, and is the example that in the past installed.
Figure 10 D is the figure that is present condition that explanation utilizes the sighting target that the horizontal single-row mask of hypomere presents, and is the example of this device.
Figure 11 A is the figure that is present condition that explanation utilizes the sighting target that vertical single-row mask presents, and is the example that in the past installed.
Figure 11 B is the figure that is present condition that explanation utilizes the sighting target that vertical single-row mask presents, and is the example of this device.
Figure 12 A is the figure that is present condition that explanation utilizes the sighting target that single text mask (mask that presents single literal sighting target) presents, and is the example that in the past installed.
Figure 12 B is the figure that is present condition that explanation utilizes the sighting target that single text mask presents, and is the example of this device.
Figure 13 is the perspective view that disposes in the behind of beam splitter in the device of concave mirror when right flank is observed framework.
The specific embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are described.Fig. 1 is the skeleton diagram of visual target presenting device of the present invention.
The front of the framework 1a that is had at apparatus main body 1 disposes by what the acrylic panel that is implemented anti-reflective film constituted and presents window 2, and the examinee can present window 2 across this and observe sighting target in framework.The inside of framework 1a is coated into black, is difficult for observing internal structure.In the front of framework 1a, dispose receiving and transmitting part 4 described later, the transmitting-receiving that this receiving and transmitting part 4 carries out at the optical signal of Digiplex 40.
Next, according to Fig. 2, Fig. 3 the leaded light optical system in the inside that is configured in framework 1a is described.Fig. 2 is the perspective skeleton diagram when the right flank of framework 1a is observed, and Fig. 3 is the perspective skeleton diagram during from top view.
On the same circumference of the discoid sighting target plate 20 that constitutes by glass plate, be formed with a plurality of inspection sighting targets such as vision value sighting target by chromium evaporation etc.Sighting target plate 20 is rotated by motor 21, thereby the sighting target that tested eye E presents is switched to be configured to be checked on the light path.The mask plate 22 that is used for a part that presents sighting target is hidden is rotated by motor 23.
In addition, in the internal configurations of framework 1a the leaded light optical system is arranged, this leaded light optical system has lighting source 24, reflecting mirror 25, beam splitter 26, the concave mirror 27 to checking that sighting target throws light on.The focal length of the concave mirror 27 in the manner is designed to the inspection distance that optical distance between when the presenting distance between the window 2 and be 1.1m of tested eye E and framework 1a sighting target and tested the E becomes 5m.In addition, the distance that presents between the window 2 of tested eye E and framework 1a also can be made as for example 0.9m accordingly with the specification of product.
The light beam of the inspection sighting target that is illuminated by lighting source 24 is after reflecting upward by reflecting mirror 25 and having passed through beam splitter 26, and 27 places are reflected at concave mirror.Sighting target light beam in the reflection of concave mirror 27 places is reflected at beam splitter 26 places, and across presenting window 2 towards tested eye E.
In Fig. 2,, dispose and be used for the detection optical system 30 that the height and position to tested eye detects at the rear of beam splitter 26.Detection optical system 30 possesses collecting lens 31, two-dimensional position detecting element 32.
Fig. 4 is the figure that is shown specifically sighting target plate 20, mask plate 22.On the sighting target plate 20 of Fig. 4 A, same circumference is provided with a plurality of sighting target pictures 50 of Landolt ring (landolt ring) the vision sighting target of having described to have various vision values, hiragana vision sighting target, red green inspection, two balance sighting targets etc.Each sighting target picture 50 is the center rotation with the rotating shaft 53 of sighting target plate 20, and by handover configurations selectively on the sighting target light path of lighting source 24, thereby in framework 1a, be a ready-made picture from presenting window 2.
Check in the sighting target at the vision sighting target, prepare on 1 sighting target picture 50, to be formed with the word battle array sighting target of a plurality of sighting targets like that with for example horizontal 3 row * vertical 5 row.In word battle array sighting target, be arranged in the mask on the mask plate 22 one by handover configurations, a part that is depicted in the sighting target in the word battle array sighting target is presented on presents in the window 2.
In the figure that mask plate 22 is shown of Fig. 4 B, be the center that the single-point line 67a that extends radially at the center represents the above-below direction of sighting target picture 50 with rotating shaft 67.In addition, in Fig. 4 B, be depicted in the horizontal center that single-point line 67b on the circular arc of same radius represents sighting target picture 50.On mask plate 22, be formed with: be used for shadow mask not and present the peristome 60 of sighting target face integral body; Be used for word battle array sighting target picture present epimere, stage casing, hypomere the position sighting target horizontal single-row mask 61 (promptly, present the mask 61 of horizontal single-row sighting target, comprising: the horizontal single-row mask 61a of epimere, the horizontal single-row mask 61b in stage casing, the horizontal single-row mask 61c of hypomere); Be used to present the vertical single-row mask 62 of the sighting target of position (that is, present the mask 62 of vertical single-row sighting target, comprising: the vertical single-row mask 62a of left end, central longitudinal are to single-row mask 62b, the vertical single-row mask 62c of right-hand member) longitudinally; And the single text mask 63,64,65 (that is the mask 63,64,65 that, presents single literal sighting target) that is used for individually presenting sighting target by per 1 literal.Single text mask 63 has and individually is presented on the mask that is arranged with 2 sighting target on laterally single-row, single text mask 64 has and individually is presented on the mask that is arranged with 3 sighting target on laterally single-row, and single text mask 65 has the mask that individually is presented on the sighting target of arranging in horizontal 3 row * vertical 5 row.
Select the sighting target that utilizes sighting target plate 20 and mask plate 22 to present by remote controller 40.Fig. 5 illustrates the control block diagram of the outward appearance and the visual target presenting device integral body of remote controller 40.Remote controller 40 possesses: the switch 42 of selecting the sighting target picture; Switch the switch 43 of single literal/horizontal single-row mask; In the presenting of word battle array sighting target, select switch 47a, the 47b (when covering mask, employed switch when mask is moved up and down) of horizontal single-row mask; In the presenting of word battle array sighting target, select switch 47c, the 47d (when covering mask, employed switch when making the mask move left and right) of vertical single-row mask; Be used to beam splitter 26 is rotated up and down and move up and down across presenting the switch 44 that sighting target that window 2 observes presents picture; And the switch 45 that when automatically setting the sighting target position of appearing, uses.In addition, remote controller 40 possesses the liquid crystal display 46 that demonstration presents sighting target and operation information etc. from the teeth outwards.Front portion, side at remote controller 40 is provided with communication window 40a, and the signal that this communication window 40a transmission is used for that apparatus main body 1 is controlled also receives the signal from apparatus main body.
The switching signal of remote controller 40 sends to apparatus main body 1 side from communication window 40a, and the signal that is received by receiving and transmitting part 4 is sent to control part 10.Control part 10 is according to the signal via receiving and transmitting part 4 inputs, and the motor 21,23 that is used for selected sighting target picture 50 and selected mask are arranged at light path is driven.In addition, if the examiner adjusts to remote controller 40 near the height and position of tested eye and presses switch 45, then send the infrared light of the provision wavelengths that is used to adjust the sighting target height from communication window 40a, 32 pairs of these light of position detecting element that had by detection optical system 30 detect.Control part 10 makes motor 29 rotations according to the output of position detecting element 32, and to the driving of the rotation up and down (inclination of above-below direction) of beam splitter 26 control so that sighting target light beam (central light beam of sighting target picture) towards the height and position of remote controller 40 residing eyes.In addition, can also drive by the rotation up and down of 44 pairs of beam splitters 26 of hand switch.
Next, just can look the method for recognizing the inspection sighting target and describe being used for when utilizing horizontal single-row mask to present to check sighting target the not mobile sight line of examinee according to Fig. 6, Fig. 7.To be explanation be used for the figure of rotation driving that central authorities at above-below direction present the beam splitter 26 of laterally single-row sighting target during at hypomere when horizontal single-row mask tegmentum to Fig. 6, is the figure from the side viewing optical system.In addition, in Fig. 6, schematically depict the optical axis L 01 of the concave mirror 27 that makes the top that is positioned at beam splitter 26 and the consistent pattern of light at the center of each mask of sighting target picture 50 that passes sighting target plate 20 and mask plate 22 as.
When utilizing horizontal single-row mask to present the inspection sighting target, for just being looked, the not mobile sight line of examinee recognizes the inspection sighting target, and making beam splitter 26 is that the center rotates up at upper and lower with rotating shaft 28.The anglec of rotation of the beam splitter 26 of this moment is to decide according to the configuration information of the sighting target that is covered laterally single-row mask and the configuration information of leaded light optical system.As the configuration information of leaded light optical system, the distance L 1 till comprising from tested eye E to the center of the rotating shaft 28 of beam splitter 26 and check distance L 2.Check that distance L 2 is the distances between sighting target picture 150 and tested the E of the virtual image that presents by beam splitter 26 and concave mirror 27 etc.For example, it approximately is 1.24m that distance L 1 is set, and checks that distance L 2 is 5m.
As the example of the configuration information of the sighting target that is covered laterally single-row mask, the sighting target picture 50 of the word battle array sighting targets of 3 row of the horizontal stroke shown in Fig. 7 A * vertical 5 row is described.In this example, when presenting the sighting target of epimere, stage casing and hypomere respectively, horizontal single- row mask 61a, 61b in the mask plate 22 and 61c are superimposed respectively.The center of epimere and hypomere is configured to the center of the sighting target in relative stage casing and leaves distance h 1 respectively.Fig. 7 B is the sighting target picture 150 of the virtual image that presents in the position of checking apart from 5m by concave mirror 27, beam splitter 26 etc., optionally is overlapped in respectively on the sighting target of sighting target picture 150 with horizontal single- row mask 161a, 161b, the 161c of horizontal single-row mask 61a, the virtual image that 61b, 61c are corresponding.At this moment, distance h 2 is left at the center that is set as the sighting target (mask 161b) in relative stage casing, the center of the sighting target of epimere and hypomere ( mask 161a, 161c) respectively.
If the imaging multiplying power of the virtual image is made as β, then the distance h 1 of sighting target picture 50 has following relation with the distance h 2 of the sighting target picture 150 of the virtual image.
H2=h1 * β (formula 1)
In addition, the imaging multiplying power β of the virtual image is according to known value, for example β=10.3 on the inner design of Optical System of device.In addition, distance h 1 is by the structures shape of sighting target, if in horizontal 2 row * vertical 2 sighting targets that are listed as, approximately be made as 9.4mm, in the sighting target of horizontal 3 row * vertical 5 row, approximately be made as 5.9mm, then the distance h 2 on the sighting target picture of the virtual image becomes about 96.8mm, about 60.8mm respectively.
, set the anglec of rotation of beam splitter 26 herein, so that the central light beam of sighting target picture 50 is consistent with the height of tested eye E.In this case, if horizontal single-row mask 61b tegmentum on the sighting target in the stage casing of sighting target picture 50, then tested eye E can observe the sighting target in stage casing across presenting window 2 on optical axis A.On the other hand, as shown in Figure 6, under the situation on the sighting target of horizontal single-row mask 61c tegmentum at hypomere,, can on the optical axis A of tested eye E, present the sighting target of the hypomere that is covered horizontal single-row mask 61c by making beam splitter 26 along the rotation of arrow F direction.If the anglec of rotation of beam splitter 26 that will this moment is made as α, then at anglec of rotation α, distance L 1 be set and check between the distance L 2, have following relation.
H2=(L2-L1) tan2 α (formula 2)
By this formula, decision anglec of rotation α.In addition, distance L 1 is set and checks that distance L 2 is that known value is gone up in design, distance h 2 is that the distance h 1 of the imaging multiplying power β by the virtual image and actual sighting target is as described above obtained.
In addition, covering on the sighting target of epimere under the situation of horizontal single-row mask 61a,, this sighting target is being moved on optical axis A by making the rightabout rotation of beam splitter 26 along arrow F direction.The anglec of rotation α of the beam splitter 26 of this moment also similarly determines with above-mentioned.
In addition, the sighting target picture 150 of the virtual image is that the center is rotated with the rotating shaft 28 of beam splitter 26, so the inspection distance L 2 on the optical axis A is more or less different before and after the rotation of beam splitter 26, but its difference is small, and is no problem in the practicality.
Gauged method is carried out in above-mentioned skew for the above-below direction when having covered horizontal single-row mask (or single text mask), but preferably beam splitter 26 is rotated driving when having covered vertical single-row mask (or single text mask) skew of left and right directions is also proofreaied and correct.In this case, making beam splitter 26 is that central shaft is rotated with the center of passing the sighting target light beam along the optical axis L 01 that above-below direction extends.The anglec of rotation of the beam splitter 26 of this moment is to decide according to the configuration information of the sighting target that is covered vertical single-row mask and the configuration information of leaded light optical system.
Fig. 8 be explanation be used for when being covered the vertical single-row mask that departs from from central authorities about central authorities present the figure that the rotation of the beam splitter 26 of vertically single-row sighting target drives, be figure from the top viewing optical system.In addition, the example as the configuration information of the sighting target that is covered vertically single-row mask uses Fig. 9 A, and the sighting target pictures 50 of the word battle array sighting targets of horizontal 3 row * vertical 5 row are described.In the figure, when presenting the sighting target row of left end, central array and right-hand member individually, vertical single- row mask 62a, 62b and 62c in the overlapping mask plate 22 of difference.The sighting target of left end and right-hand member row are configured to respectively relatively the sighting target center of central array and leave distance h 3.Fig. 9 B is the sighting target picture 150 of the virtual image that presents in the position of checking apart from 5m, and vertical single- row mask 162a, 162b, the 162c of the virtual image corresponding with vertical single- row mask 62a, 62b and 62c optionally are overlapped in respectively on the sighting target of sighting target picture 150.At this moment, the sighting target center that utilizes vertical single- row mask 162a and 162c to present is set as the sighting target center that utilizes vertical single-row mask 162b to present respectively relatively and leaves distance h 4.Distance h 4 is multiplied by imaging multiplying power β by the h3 that adjusts the distance and obtains.
So, cover under the situation of vertical single-row mask 62a at sighting target row left end, as shown in Figure 8, by making beam splitter 26 only with anglec of rotation γ rotation, the sighting target of the left end that has been covered vertical single-row mask 62a be moved on optical axis A along arrow R direction (when the examinee observes for to the right).If will be, and will check and to obtain anglec of rotation γ by following formula when being made as L2 from tested eye E to being made as L1 as the distance till the optical axis L 01 of the center of rotation of beam splitter 26.
H4=(L2-L1) tan γ (formula 3)
In addition, covered under the situation of vertical single-row mask 62c at sighting target row right-hand member, by making beam splitter 26 only with anglec of rotation γ rotation, the sighting target of the right-hand member that has been covered vertical single-row mask 62c be moved on optical axis A along the rightabout of arrow R direction (when the examinee observes for left).
Next, the inspection action of having used the device with above such structure is described.At first, be positioned at the assigned position that presents window 1.1m, check that distance is configured to predetermined distance (5m) apart from framework 1 by making the examinee.Next, in order to import the height and position of tested eye E, the examiner remote controller 40 is placed tested eye E eyes near, and press switch 45.Gather position detecting element 32 from the position signalling that communication window 40a sends by collecting lens 31 according to this operation, the data of the height and position of tested eye are detected (making the light path of the sighting target light method consistent with tested height please in detail with reference to Japanese kokai publication hei 7-236612).Control part 10 makes turning motor 29 rotation respective amount up and down according to this position data.By the rotation of turning motor 29 up and down, the angle of beam splitter 26 changes, and the sighting target light beam at the center of sighting target picture 50 is towards the short transverse of tested eye E.
After the sighting target light beam correctly was injected into tested eye, examiner's remote controller 40 was carried out examination of visual acuity.If the sighting target that the examiner has selected hope to present by the switch 42 of remote controller 40, then the kind of selected sighting target is displayed on the liquid crystal display 46 of remote controller 40, and sighting target selects signal to send to apparatus main body 1 from sending window 40a simultaneously.Receiving and transmitting part 4 by apparatus main body 1 receives sighting target selection signal, and the sighting target picture of selecting in sighting target plate 20 50 is set in the light path.For example, will check that sighting target is made as the sighting target of the sighting target picture 50 of horizontal stroke 3 row * vertical 5 row of having selected shown in Fig. 7.
If the switch 47a or the 47b of remote controller 40 are pressed, then be rotated driving by 10 pairs of mask plates 22 of control part, horizontal single-row mask 61b tegmentum is in the stage casing of the sighting target picture 50 that is presented.Next, if the examiner for the vision value sighting target that makes horizontal single-row mask becomes next bigger vision value sighting target and push switch 47a, then the horizontal single-row mask 61a of epimere is covered.At this moment, the signal of control part 10 responding to switch 47a drives motor 29, as shown in Figure 6, makes beam splitter 26 only with the axle rotation of anglec of rotation α around rotating shaft 28.The direction of rotation of this moment be with the arrow F side of Fig. 6 in the opposite direction.Anglec of rotation α is by computing decides according to above-mentioned formula (2) by control part 10.Direction of rotation is according to the upside or the downside of the central authorities of sighting target picture 50 decide relatively.In addition, the anglec of rotation α and the direction of rotation of the beam splitter 26 that is determined by control part 10 response mask selector switch 47a, 47b are not all to calculate at every turn, also can respond mask and select the switch 47a of usefulness or the signal of 47b, access the anglec of rotation α and the direction of rotation that are stored in advance in the memorizer.
Figure 10 A is that beam splitter 26 does not rotate the present condition that is that utilizes sighting target that the horizontal single-row mask of epimere presents in the device in the past when driving.In the past, the sighting target that has covered horizontal single-row mask is presenting in the observed mode of the upside that presents window 2.In this case, the examinee need move up sight line.In addition, the examinee is easy to grasp the sighting target content according to the position of checking sighting target.Relative with it, Figure 10 B is the present condition that is that utilizes sighting target that this device presents, even under the situation of having selected epimere mask 61a, the sighting target that has covered horizontal single-row mask also is presented in the central authorities up and down that present window.Therefore, the examinee need not mobile sight line just can observe sighting target, remembers that according to the position of sighting target the phenomenon of sighting target content is alleviated.
In addition, if 47b operates to switch, imported the signal that covers the horizontal single-row mask 61c of hypomere for the sighting target that presents the hypomere that is positioned at sighting target picture 50, then control part 10 these signals of response drive motor 29, and beam splitter 26 is only rotated along the arrow F direction of Fig. 6 with anglec of rotation α.Thus, even under the situation that has covered the horizontal single-row mask 61c of hypomere, can will check like that shown in Figure 10 D that also sighting target is presented in the central authorities that present window 2.Figure 10 C be under the beam splitter 26 non-rotary situations device in the past be present condition.
In addition, when utilizing vertical single-row mask and single text mask to present sighting target, also preferably can present sighting target in central authorities.In horizontal stroke 3 row * vertical 5 sighting target pictures 50 that are listed as of Fig. 9 A, if for the sighting target that vertical single-row mask is covered at left end lists, press the switch 47c that selects vertical mask, control part 10 rotation mask plates 22 then, with the vertical mask 62a of left end handover configurations in light path.In addition, control part 10 responds this switching signal simultaneously motor 39 is driven, and as shown in Figure 8, beam splitter 26 is only rotated along arrow R direction (being viewed as to the right from the examinee) with anglec of rotation γ.Thus, shown in Figure 11 A, shown in Figure 11 B, be presented to central authorities at the vertical single-row sighting target of being presented in the left side that presents window 2 in the past.
And then, if in order to select single text mask, and press the mask change-over switch 43 of single literal/laterally from the present condition that is of the horizontal single-row mask of Figure 10 B, then the single text mask of the regulation that had of mask plate 22 is switched in the light path.Under the situation of single text mask, can be used to signal that mask position is moved by switch 47a～47b input.Herein, the mode of setting to present upper left sighting target in horizontal stroke 3 row * vertical 5 sighting target pictures 50 that are listed as of for example Fig. 7 A has changed single text mask.In this case, the selection signal of the single text mask of control part 10 responding to switch 43 grades, is the center along the rightabout of the arrow F of Fig. 6 only with anglec of rotation α rotation and make beam splitter 26 with rotating shaft 28, and to make beam splitter 26 be that the center only rotates with anglec of rotation γ along the arrow R direction of Fig. 8 with axle L01.Thus, shown in Figure 12 A, about the sighting target of in the past being presented in the upper left single literal that presents window 2 is present in shown in Figure 12 B and central authorities up and down.Thus, under the situation that the sighting target of single text mask presents, can alleviate the examinee and remember the situation of sighting target content, avoid replying based on memory according to the position of appearing of sighting target.Therefore, can correctly carry out examination of visual acuity.
The leaded light optical system that sighting target shown in above-mentioned Fig. 2 presents can realize various distortion.For example, also can constitute as shown in Figure 13 at the behind of beam splitter 26 configuration concave mirror 27.In this optical system, reflect upward by reflecting mirror 25 by the light beam of the inspection sighting target of lighting source 24 irradiation, and then reflexing to by beam splitter 26 after concave mirror 27 sides of behind, 27 places are reflected at concave mirror.After the sighting target light beam of concave mirror 27 places reflection has passed through beam splitter 26, across presenting window 2 towards tested eye E.Under the situation of this structure, by making the axle rotation of beam splitter 26, thereby be changed towards the height of the sighting target light beam of concave mirror 27 by beam splitter 26 reflections around rotating shaft 28.With above-mentioned example similarly, if selected the horizontal single-row mask of epimere or hypomere, then beam splitter 26 rotates accordingly with selected horizontal single-row mask, presents the sighting target that has been covered horizontal single-row mask on the sight line of the roughly sustained height of tested eye.In addition, beam splitter 26 is by around rotating shaft 28 and pass the optical axis of concave mirror 27 and the axle rotation of the axle L01 that extends along above-below direction, thereby is changed towards the position, the left and right sides of the sighting target light beam of concave mirror 27 by beam splitter 26 reflections.When having selected vertical single-row mask, beam splitter 26 is that the center is rotated with axle L01 with selected vertical single-row mask accordingly, thereby presents the sighting target that has been covered vertical single-row mask on the same sight line of the left and right directions of tested eye.Determine the anglec of rotation of above-below direction, the anglec of rotation of left and right directions by control part 10 as described above according to the selection signal of horizontal single-row mask or vertical single-row mask.When selecting single text mask, the rotation of above-below direction and the rotation of left and right directions are synthesized.
In addition, also can constitute in the behind of beam splitter 26 and dispose in the leaded light optical system of concave mirror 27, beam splitter 26 and concave mirror 27 are made as one, is that the center is rotated on above-below direction by rotary drive mechanism 100 up and down with rotating shaft 28, is that the center is rotated on left and right directions by left rotation and right rotation mechanism 101 with axle L01.In the structure that beam splitter 26 and concave mirror 27 rotate integratedly, even concave mirror 27 is not big size, also can be corresponding to the height of tested eye.In addition, owing to used the mirror surface of the optical axis of as close as possible concave mirror 27, so can reduce the influence of aberration.
Claims (5)
1. visual target presenting device is characterized in that possessing:
Be disposed in the framework of device and across presenting window imports leaded light optical system from the sighting target light beam to tested eye, this leaded light optical system has: have the sighting target panel that is divided into up and down a plurality of sections and has described the sighting target picture of a plurality of sighting targets on each section, mask plate with the mask that optionally presents a part that is depicted in the sighting target on the above-mentioned sighting target picture, the concave mirror that presents above-mentioned sighting target picture with the inspection distance of stipulating on the optics, and be obliquely installed beam splitter on the optical axis of this concave mirror, make the sighting target light beam towards tested eye by above-mentioned beam splitter and concave mirror;
Making above-mentioned beam splitter is the rotary unit up and down that the center is rotated with optical axis that passes above-mentioned concave mirror and the rotating shaft that extends along left and right directions;
The mask selected cell of the selection signal of the mask that input aforementioned mask plate is had; And
When having imported the selection signal of horizontal single-row mask by the aforementioned mask selected cell, configuration information according to the sighting target that is covered horizontal single-row mask, decision makes the anglec of rotation α of above-mentioned beam splitter rotation so that be covered the sighting target of horizontal single-row mask and be positioned on the sight line with the roughly the same height of tested eye, and the control unit of the above-mentioned driving of rotary unit up and down being controlled according to the anglec of rotation α of this decision.
2. visual target presenting device according to claim 1 is characterized in that,
Above-mentioned control unit till according to the optical check distance of the distance of the above-below direction of the central authorities of the relative sighting target picture of sighting target that is covered horizontal single-row mask, sighting target picture, from tested eye to the center of rotation of above-mentioned beam splitter distance and the imaging multiplying power of above-mentioned concave mirror decide above-mentioned anglec of rotation α.
3. visual target presenting device according to claim 1 is characterized in that,
The input block that also possesses the height of the tested eye of input,
Above-mentioned control unit is controlled the sighting target light beam of the central authorities that make above-mentioned sighting target picture at the height according to the tested eye of being imported after tested eye to the above-mentioned driving of rotary unit up and down, and then decide above-mentioned anglec of rotation α, and the above-mentioned driving of rotary unit is up and down controlled according to the selection signal of the horizontal single-row mask by aforementioned mask selected cell input.
4. visual target presenting device according to claim 1 is characterized in that,
Possess also that to make above-mentioned beam splitter be the left rotation and right rotation unit that the center is rotated with the axle that extends along above-below direction,
Above-mentioned control unit is when having imported the selection signal of vertical single-row mask by the aforementioned mask selected cell, configuration information according to the sighting target that is covered vertical single-row mask, decision make above-mentioned beam splitter at anglec of rotation γ that right and left rotates up so that be covered the sighting target of vertical single-row mask and be positioned on the roughly the same sight line of the left and right directions of tested eye, and according to the anglec of rotation γ of this decision to above-mentioned left rotation and right rotation unitary driving control.
5. visual target presenting device according to claim 4 is characterized in that,
Above-mentioned control unit is when having imported the selection signal of single text mask by the aforementioned mask selected cell, configuration information according to the sighting target that is covered single text mask, decision makes the anglec of rotation α of above-below direction of above-mentioned beam splitter rotation and the anglec of rotation γ of left and right directions, so that be covered on the sight line that the sighting target of single text mask is positioned at all roughly the same tested eye of short transverse and left and right directions, and above-mentioned rotary unit up and down and left rotation and right rotation unit are controlled according to the anglec of rotation α and the anglec of rotation γ of this decision.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-286585 | 2007-11-02 | ||
| JP2007286585 | 2007-11-02 | ||
| JP2007286585A JP5048457B2 (en) | 2007-11-02 | 2007-11-02 | Target presentation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101422355A true CN101422355A (en) | 2009-05-06 |
| CN101422355B CN101422355B (en) | 2012-06-13 |
Family
ID=40613400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101738281A Active CN101422355B (en) | 2007-11-02 | 2008-10-29 | Visual target presenting device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5048457B2 (en) |
| KR (1) | KR101482797B1 (en) |
| CN (1) | CN101422355B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103565397A (en) * | 2012-07-31 | 2014-02-12 | 尼德克株式会社 | Eye examination device |
| CN106137111A (en) * | 2016-06-25 | 2016-11-23 | 利辛县眼病防治所 | A kind of anti-cheating visual acuity chart and using method thereof |
| CN111295128A (en) * | 2017-10-30 | 2020-06-16 | 威里利生命科学有限责任公司 | Active visual alignment stimulation in fundus photography |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5078486A (en) * | 1989-10-13 | 1992-01-07 | Evans David W | Self-calibrating vision test apparatus |
| US5568209A (en) * | 1995-04-17 | 1996-10-22 | Priester; William B. | Automated pocket-sized near vision tester |
| JP3850254B2 (en) | 2000-10-20 | 2006-11-29 | 株式会社ニデック | Space-saving visual function inspection device |
-
2007
- 2007-11-02 JP JP2007286585A patent/JP5048457B2/en not_active Expired - Fee Related
-
2008
- 2008-10-17 KR KR20080101838A patent/KR101482797B1/en active IP Right Grant
- 2008-10-29 CN CN2008101738281A patent/CN101422355B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103565397A (en) * | 2012-07-31 | 2014-02-12 | 尼德克株式会社 | Eye examination device |
| CN103565397B (en) * | 2012-07-31 | 2016-08-10 | 尼德克株式会社 | Ophthalmic unit |
| CN106137111A (en) * | 2016-06-25 | 2016-11-23 | 利辛县眼病防治所 | A kind of anti-cheating visual acuity chart and using method thereof |
| CN111295128A (en) * | 2017-10-30 | 2020-06-16 | 威里利生命科学有限责任公司 | Active visual alignment stimulation in fundus photography |
| CN111295128B (en) * | 2017-10-30 | 2022-08-19 | 威里利生命科学有限责任公司 | Active visual alignment stimulation in fundus photography |
| US11844573B2 (en) | 2017-10-30 | 2023-12-19 | Verily Life Sciences Llc | Active visual alignment stimuli in fundus photography |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101422355B (en) | 2012-06-13 |
| JP2009112408A (en) | 2009-05-28 |
| KR101482797B1 (en) | 2015-01-14 |
| JP5048457B2 (en) | 2012-10-17 |
| KR20090045846A (en) | 2009-05-08 |
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