CN109820475A - The light channel structure of interior reading formula projection vision tester for eyesight - Google Patents
The light channel structure of interior reading formula projection vision tester for eyesight Download PDFInfo
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- CN109820475A CN109820475A CN201910137503.6A CN201910137503A CN109820475A CN 109820475 A CN109820475 A CN 109820475A CN 201910137503 A CN201910137503 A CN 201910137503A CN 109820475 A CN109820475 A CN 109820475A
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- Prior art keywords
- plane mirror
- light
- mirror
- channel structure
- target disk
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- 230000004438 eyesight Effects 0.000 title claims abstract description 40
- 230000013011 mating Effects 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Eye Examination Apparatus (AREA)
Abstract
The invention discloses the light channel structures that formula projection vision tester for eyesight is read in one kind, this light channel structure includes the sighting target disk rotated by shaft, light source, even mating plate, first plane mirror and concave mirror, first plane mirror is in tilted layout, sighting target disk is between even mating plate and the first plane mirror, concave mirror is set to above the first plane mirror, the light of light source is through even mating plate by sighting target disk pattern projection to the first plane mirror, first plane mirror light is projected to concave mirror, this light channel structure further includes the second plane mirror, the inclination of second plane mirror is set on the outside of the optical path of the first plane mirror and concave mirror, the light of concave mirror is projected to the second plane mirror, second plane mirror is by sighting target disk pattern projection to subject's human eye.This light channel structure overcomes the defect of reading formula projection vision tester for eyesight light path system in tradition, effectively improves the light of eye test image, avoids light intensity loss, reduces equipment energy consumption and cost.
Description
Technical field
The present invention relates to the light channel structures that formula projection vision tester for eyesight is read in one kind.
Background technique
Usually in eye test, as shown in Figure 1, the lamp box visual chart 1 for eye test requires to hang over from subject 2
At the 5m of front, therefore optometry room must have sizable area.The projection and liquid crystal display visual chart developed in recent years is equally
Need large area optometry room.
In order to reduce optometry room area, as shown in Fig. 2, can at 2 front 2.5m of subject holding plane mirror 3, and incite somebody to action
Lamp box visual chart 1 or liquid crystal display visual chart are placed on behind subject 2, and subject 2 is reflected to watch to reach by plane mirror 3
Same Checking on effect.
But modern optometry room usually requires the plurality of devices such as configuration refractor, test piece instrument and comprehensive optometry platform, reflection
Visual chart will will receive blocking during eye test, affect vision inspection.
To avoid view obstruction, as shown in figure 3, visual chart is compressed in cabinet 4 by reading formula projection vision tester for eyesight in one kind in the recent period
In, cabinet 4 is placed at 2 front 1.1m of subject, avoids the defect of aforementioned several eye tests.As shown in figure 4, the instrument
The sighting target disk 42 that inside is provided with a set of light path system and is rotated by shaft 41, light path system includes horizontally disposed light source
43, even mating plate 44, plane mirror 45 and the vertically arranged semi-transparent spectroscope 46 of plane mirror 45, concave mirror 47,
Setting protection eyeglass 48 in front of semi-transparent spectroscope 46, wherein plane mirror 45 and semi-transparent spectroscope 46 are from the horizontal by one
Fixed angle, sighting target disk 42 are set between even mating plate 44 and plane mirror 45；Sighting target disk 42 is peripherally disposed several
Eye test pattern is projected to plane mirror 45 through even mating plate 44 by eye test pattern, light source 43, plane mirror 45
Light is projected to concave mirror 47 through semi-transparent spectroscope 46, and 47 light of concave mirror reflexes to semi-transparent spectroscope 46, when by
When inspection person is sitting in front of instrument at 1.1 m, the virtual image that semi-transparent spectroscope 46 is formed is protected eyeglass 48 just to fall in it at the moment at 5m,
Rotation sighting target disk 42 can replace a variety of different patterns, to achieve the purpose that test eyesight.
The instrument is due to using semi-transparent spectroscope, luminance loss's half when the light of plane mirror penetrates, through concave surface
Light when semi-transparent spectroscope reflects again is reached after mirror imager loses half, the image that subject sees through protection eyeglass again
Light reduces more than half, and whole process light intensity loss is more than 90 %, and therefore, which must use the halogen lamp of high brightness
Or great power LED luminous tube increases energy consumption and heat as light source as a result, or need to add cooling mechanism, waste of energy,
Improve equipment cost.
Summary of the invention
Technical problem to be solved by the invention is to provide the light channel structure that formula projection vision tester for eyesight is read in one kind, this optical path knots
Structure overcomes the defect of reading formula projection vision tester for eyesight light path system in tradition, effectively improves the light of eye test image, avoids light intensity
Loss reduces equipment energy consumption and cost.
In order to solve the above technical problems, the light channel structure of reading formula projection vision tester for eyesight includes being rotated by shaft in the present invention
Sighting target disk, light source, even mating plate, the first plane mirror and concave mirror, first plane mirror is in tilted layout, described
For sighting target disk between the even mating plate and the first plane mirror, the concave mirror is set to first plane mirror
Top, the light of the light source is through even mating plate by sighting target disk pattern projection to first plane mirror, first plane
Reflective mirror light is projected to the concave mirror, this light channel structure further includes the second plane mirror, and second plane is anti-
Light microscopic inclination is set on the outside of the optical path of first plane mirror and concave mirror, the light projection of the concave mirror
To second plane mirror, second plane mirror is by sighting target disk pattern projection to subject's human eye.
Further, this structure further includes protection eyeglass, and the protection eyeglass is set in front of second plane mirror.
Further, the light source is low power halogen lamp or LED light tube.
Light channel structure due to reading formula projection vision tester for eyesight in the present invention uses above-mentioned technical proposal, i.e. this light channel structure includes logical
Cross sighting target disk, light source, even mating plate, the first plane mirror and the concave mirror of shaft rotation, the inclination of the first plane mirror
Arrangement, sighting target disk is between even mating plate and the first plane mirror, and concave mirror is set to above the first plane mirror, light
For the light in source through even mating plate by sighting target disk pattern projection to the first plane mirror, the first plane mirror light is projected to concave surface
Reflecting mirror, this light channel structure further include the second plane mirror, the inclination of the second plane mirror be set to the first plane mirror with
On the outside of the optical path of concave mirror, the light of concave mirror is projected to the second plane mirror, and the second plane mirror will regard
Bidding quotation pattern projection is to subject's human eye.This light channel structure overcomes the defect of reading formula projection vision tester for eyesight light path system in tradition, has
Effect improves the light of eye test image, avoids light intensity loss, reduces equipment energy consumption and cost.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:
Fig. 1 is to check schematic diagram using lamp box E snellen chart visual acuity；
Fig. 2 is that lamp box visual chart reflects eye test schematic diagram；
Fig. 3 is that interior reading formula projects vision tester for eyesight eye test schematic diagram；
Fig. 4 is that interior reading formula projects light channel structure schematic diagram inside vision tester for eyesight；
Fig. 5 is the light channel structure schematic diagram that reading formula projects vision tester for eyesight in the present invention.
Specific embodiment
Embodiment is as shown in figure 5, the light channel structure of reading formula projection vision tester for eyesight includes being rotated by shaft 41 in the present invention
Sighting target disk 42, light source 43, even mating plate 44, the first plane mirror 45 and concave mirror 47, first plane mirror 45
It is in tilted layout, the sighting target disk 42 is between the even mating plate 44 and the first plane mirror 45, the concave mirror 47
Above first plane mirror 45, the light of the light source 43 is through even mating plate 44 by 42 pattern projection of sighting target disk to institute
The first plane mirror 45 is stated, 45 light of the first plane mirror is projected to the concave mirror 47, this light channel structure
It further include the second plane mirror 49, the inclination of the second plane mirror 49 is set to first plane mirror 45 and concave surface
On the outside of the optical path of reflecting mirror 47, the light of the concave mirror 47 is projected to second plane mirror 49, and described second
Plane mirror 49 is by 42 pattern projection of sighting target disk to subject's human eye.
Preferably, this structure further includes protection eyeglass 48, and the protection eyeglass 48 is set to second plane mirror 49
Front.
Preferably, the light source 43 is low power halogen lamp or LED light tube.
The use condition of this light channel structure is identical as reading formula projection vision tester for eyesight in tradition, is also located in front of subject
At 1.1m, instrument is formed by image away from subject 5m, but interior lights road uses different structures.This light channel structure will pass
Semi-transparent spectroscope of uniting changes plane mirror into, and plane mirror avoids sighting target disk pattern projection to concave mirror to left
Optical path, in practical application, rotating clockwise concave mirror, by sighting target disk pattern to project plane by concave mirror reflective
On mirror, the inclination angle for finely tuning plane mirror allows sighting target disk pattern by protecting eyeglass to project human eye, reaches the mesh of eye test
's.
In this light channel structure, since light is directly to project, light intensity loss is avoided, there is no need to using high brightness
Halogen lamp or great power LED luminous tube are as light source, to effectively increase the light of eye test image, reduce equipment energy consumption
And cost.
Claims (3)
1. the light channel structure of reading formula projection vision tester for eyesight in one kind, including the sighting target disk, light source, even mating plate, the rotated by shaft
One plane mirror and concave mirror, first plane mirror are in tilted layout, and the sighting target disk is located at the even mating plate
Between the first plane mirror, the concave mirror is set to above first plane mirror, the light of the light source
Through even mating plate by sighting target disk pattern projection to first plane mirror, the first plane mirror light is projected to described
Concave mirror, it is characterised in that: this light channel structure further includes the second plane mirror, and the second plane mirror inclination is set
On the outside of the optical path of first plane mirror and concave mirror, the light of the concave mirror is projected to described second
Plane mirror, second plane mirror is by sighting target disk pattern projection to subject's human eye.
2. the light channel structure of interior reading formula projection vision tester for eyesight according to claim 1, it is characterised in that: this structure further includes protecting
Protecting lens, the protection eyeglass are set in front of second plane mirror.
3. the light channel structure of interior reading formula projection vision tester for eyesight according to claim 1 or 2, it is characterised in that: the light source is
Low power halogen lamp or LED light tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137503.6A CN109820475A (en) | 2019-02-25 | 2019-02-25 | The light channel structure of interior reading formula projection vision tester for eyesight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137503.6A CN109820475A (en) | 2019-02-25 | 2019-02-25 | The light channel structure of interior reading formula projection vision tester for eyesight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109820475A true CN109820475A (en) | 2019-05-31 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910137503.6A Pending CN109820475A (en) | 2019-02-25 | 2019-02-25 | The light channel structure of interior reading formula projection vision tester for eyesight |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110811534A (en) * | 2019-12-06 | 2020-02-21 | 张科宇 | Vision detection device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05329102A (en) * | 1992-05-30 | 1993-12-14 | Nidek Co Ltd | Visual acuity inspector |
| KR20090034622A (en) * | 2007-10-04 | 2009-04-08 | 주식회사 휴비츠 | Optical proximity apparatus including led module |
| CN201263675Y (en) * | 2008-09-28 | 2009-07-01 | 上海彦科仪器有限公司 | Inner read type projection optometry instrument |
| JP2014028067A (en) * | 2012-07-31 | 2014-02-13 | Nidek Co Ltd | Optometer |
| US20140185012A1 (en) * | 2012-12-28 | 2014-07-03 | Nidek Co., Ltd. | Optometry apparatus |
| JP2016028760A (en) * | 2015-10-30 | 2016-03-03 | 株式会社トプコン | Eyesight display device |
| CN107157437A (en) * | 2017-06-22 | 2017-09-15 | 宁波明星科技发展有限公司 | A kind of twin-lens reflex formula liquid crystal vision tester for eyesight |
| JP2018171229A (en) * | 2017-03-31 | 2018-11-08 | 株式会社ニデック | Subjective optometric apparatus |
| CN210124755U (en) * | 2019-02-25 | 2020-03-06 | 上海雄博精密仪器股份有限公司 | Light path structure of internal reading type projection vision instrument |
-
2019
- 2019-02-25 CN CN201910137503.6A patent/CN109820475A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05329102A (en) * | 1992-05-30 | 1993-12-14 | Nidek Co Ltd | Visual acuity inspector |
| KR20090034622A (en) * | 2007-10-04 | 2009-04-08 | 주식회사 휴비츠 | Optical proximity apparatus including led module |
| CN201263675Y (en) * | 2008-09-28 | 2009-07-01 | 上海彦科仪器有限公司 | Inner read type projection optometry instrument |
| JP2014028067A (en) * | 2012-07-31 | 2014-02-13 | Nidek Co Ltd | Optometer |
| US20140185012A1 (en) * | 2012-12-28 | 2014-07-03 | Nidek Co., Ltd. | Optometry apparatus |
| JP2016028760A (en) * | 2015-10-30 | 2016-03-03 | 株式会社トプコン | Eyesight display device |
| JP2018171229A (en) * | 2017-03-31 | 2018-11-08 | 株式会社ニデック | Subjective optometric apparatus |
| CN107157437A (en) * | 2017-06-22 | 2017-09-15 | 宁波明星科技发展有限公司 | A kind of twin-lens reflex formula liquid crystal vision tester for eyesight |
| CN210124755U (en) * | 2019-02-25 | 2020-03-06 | 上海雄博精密仪器股份有限公司 | Light path structure of internal reading type projection vision instrument |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110811534A (en) * | 2019-12-06 | 2020-02-21 | 张科宇 | Vision detection device |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20221102 Address after: No. 800, Chenggong Road, Baoshan District, Shanghai 200444 Applicant after: SHANGHAI SUPORE INSTRUMENTS Co.,Ltd. Applicant after: Shanghai Karuizhi Medical Technology Co.,Ltd. Applicant after: Hunan karuizhi Medical Technology Co.,Ltd. Address before: No. 800, Chenggong Road, Baoshan District, Shanghai 200444 Applicant before: SHANGHAI SUPORE INSTRUMENTS Co.,Ltd. |
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| TA01 | Transfer of patent application right |