CN107157437A - A kind of twin-lens reflex formula liquid crystal vision tester for eyesight - Google Patents
A kind of twin-lens reflex formula liquid crystal vision tester for eyesight Download PDFInfo
- Publication number
- CN107157437A CN107157437A CN201710482255.XA CN201710482255A CN107157437A CN 107157437 A CN107157437 A CN 107157437A CN 201710482255 A CN201710482255 A CN 201710482255A CN 107157437 A CN107157437 A CN 107157437A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- reflective mirror
- twin
- eyesight
- vision tester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000004438 eyesight Effects 0.000 title claims abstract description 34
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 18
- 230000011514 reflex Effects 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims description 3
- 230000004075 alteration Effects 0.000 abstract description 6
- 230000000007 visual effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
Classifications
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Eye Examination Apparatus (AREA)
Abstract
The present invention relates to a kind of twin-lens reflex formula liquid crystal vision tester for eyesight.Including hardware components and software section, it is characterized in that described hardware components include plano-concave lens, planoconvex spotlight, reflective mirror one, reflective mirror two, LCD display, controller, described software section includes icon control module and liquid crystal driver module, described controller driving LCD display shows icon, icon sequentially passes through reflective mirror one, plano-concave lens, planoconvex spotlight and reflective mirror two, the sighting target virtual image is formed at the rear side of vision tester for eyesight, the front side of instrument sets observation window, human eye is tested apart from observation window certain distance, the distance between the virtual image and human eye to be tested are 5m.The present invention provides a kind of twin-lens reflex formula liquid crystal vision tester for eyesight, greatly reduces sighting target aberration, reduces the influence that patient is caused in optometry by the error band of instrument in itself, improve optometry accuracy, and reduce the volume and weight of instrument.
Description
Technical field
The present invention relates to a kind of twin-lens reflex formula liquid crystal vision tester for eyesight.
Background technology
The inspection distance of standard visual acuity chart is 5m, and the space requirement to optometry place is higher, considerably increases optometry cost.
Existing can be mainly interior throwing visual chart in the visual chart of the use of small space and energy mock standard inspection distance, and simple lens is existed
Larger aberration, causes sighting target unintelligible, so as to cause error to a certain extent to the accuracy of optometry.It is simultaneously existing
Instrument quality is larger, it is difficult to move, to using causing inconvenience.
The content of the invention
The invention aims to solve two problems of prior art presence, so as to provide a kind of twin-lens reflex formula
Liquid crystal vision tester for eyesight, greatly reduces sighting target aberration, reduces the influence that patient is caused in optometry by the error band of instrument in itself,
Optometry accuracy is improved, and reduces the volume and weight of instrument.
Twin-lens reflex formula liquid crystal vision tester for eyesight, including hardware components and software section, it is characterised in that described Hardware Subdivision
Dividing includes plano-concave lens, planoconvex spotlight, reflective mirror one, reflective mirror two, LCD display, and controller, described software section includes
Icon control module and liquid crystal driver module, described controller driving LCD display show icon, and icon sequentially passes through reflective
Mirror one, plano-concave lens, planoconvex spotlight and reflective mirror two, form the sighting target virtual image at the rear side of vision tester for eyesight, and the front side of instrument is set
Observation window, human eye is tested apart from observation window certain distance, and the distance between the virtual image and human eye to be tested are 5m.
Described plano-concave lens and lens of the planoconvex spotlight for the material of two pieces of different Abbe numbers.
Two described reflective mirrors are set in 45 degree of angles, and are parallel to each other.
Described plano-concave lens, planoconvex spotlight, reflective mirror one and the perpendicular lineal layout of reflective mirror two.
The distance of window is 4.2m on rear side of the described virtual image and instrument, and human eye to be measured is apart from instrument window 0.8m.
Described controller is remote manipulator.
The advantage of the invention is that：
1. using twin-lens structural transmission icon, light path aberration is reduced, the accuracy of optometry is improved.
2. measurement height reduces the volume of instrument, the weight of instrument is reduced, is moved easily, cost of transportation is reduced.
3. carrying out sighting target switching using LCD display, speed is fast, non-jitter.
4. small volume, is adapted near work, optometry place is saved.
Brief description of the drawings
Fig. 1 is operation principle schematic diagram of the present invention
Fig. 2 is light path principle schematic diagram of the present invention
Fig. 3 is that existing simple lens system analyzes comparison diagram with two-lens system geometric image of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described further：
As shown in Figure 1, 2, 3, twin-lens reflex formula liquid crystal vision tester for eyesight, including hardware components and software section, hardware components
Including plano-concave lens 3, planoconvex spotlight 4, reflective mirror 1, reflective mirror 26, LCD display 1 and remote control, software section includes figure
Mark control module and liquid crystal driver module.Remote control sends icon instruction, and driving LCD display 1 shows icon, by reflective mirror
One 2, plano-concave lens 3, planoconvex spotlight 4 and reflective mirror 26, are forming the sighting target virtual image 7, patient is before instrument at 4.2m on rear side of instrument
Observation regards the sighting target virtual image 7 at the 0.8m of side, that is, realizes 5m effects.Described plano-concave lens, planoconvex spotlight and two reflective mirrors are in vertical
Straight lineal layout.Two described reflective mirrors are set in 45 degree of angles, and are parallel to each other.Described plano-concave lens and planoconvex spotlight be
The lens of the material of two pieces of different Abbe numbers.
The main distinction of the present invention and prior art：
1. existing can be mainly in simple lens formula in the visual chart of the use of small space and energy mock standard inspection distance
Visual chart is thrown, simple lens has larger spherical aberration, aberration and distortion, causes sighting target unintelligible, so as to the accuracy of optometry
Cause error to a certain extent.The present invention changes light channel structure, and using the lens of two pieces of different Abbe numbers, one piece is flat
Concavees lens, one piece is planoconvex spotlight, has largely corrected the dispersion of simple lens system generation, becoming apparent from sighting target can
Distinguish, so as to improve the accuracy of optometry.
2. existing like product volume is larger, the weight of increased instrument, causes the increase of cost of transportation and movement is tired
It is difficult.The total height of instrument is reduced to about 60cm, corresponding quality is also in existing product by the present invention by changing light channel structure
On the basis of have and significantly reduce.
Listed above is only the specific embodiment of the present invention, the invention is not restricted to above embodiment, can also be had
Many deformations.All deformations that one of ordinary skill in the art directly can export or associate from present disclosure,
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of twin-lens reflex formula liquid crystal vision tester for eyesight, including hardware components and software section, it is characterised in that described hardware
Part includes plano-concave lens, planoconvex spotlight, reflective mirror one, reflective mirror two, LCD display, controller, described software section bag
Icon control module and liquid crystal driver module are included, described controller driving LCD display shows icon, and icon is sequentially passed through instead
Light microscopic one, plano-concave lens, planoconvex spotlight and reflective mirror two, form at the rear side of vision tester for eyesight and are set on front side of the sighting target virtual image, instrument
Observation window is put, human eye is tested apart from observation window certain distance, the distance between the virtual image and human eye to be tested are 5m.
2. a kind of twin-lens reflex formula liquid crystal vision tester for eyesight according to claim 1, it is characterised in that described plano-concave lens
With the lens for the material that planoconvex spotlight is two pieces of different Abbe numbers.
3. a kind of twin-lens reflex formula liquid crystal vision tester for eyesight according to claim 2, it is characterised in that described two are reflective
Mirror is set in 45 degree of angles, and is parallel to each other.
4. a kind of twin-lens reflex formula liquid crystal vision tester for eyesight according to claim 3, it is characterised in that described plano-concave lens,
Planoconvex spotlight, reflective mirror one and the perpendicular lineal layout of reflective mirror two.
5. a kind of twin-lens reflex formula liquid crystal vision tester for eyesight according to claim 4, it is characterised in that the described virtual image and instrument
The distance of window is 4.2m on rear side of device, and human eye to be measured is apart from instrument window 0.8m.
6. a kind of twin-lens reflex formula liquid crystal vision tester for eyesight according to claim 5, it is characterised in that described controller is
Remote manipulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482255.XA CN107157437A (en) | 2017-06-22 | 2017-06-22 | A kind of twin-lens reflex formula liquid crystal vision tester for eyesight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482255.XA CN107157437A (en) | 2017-06-22 | 2017-06-22 | A kind of twin-lens reflex formula liquid crystal vision tester for eyesight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107157437A true CN107157437A (en) | 2017-09-15 |
Family
ID=59819322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710482255.XA Pending CN107157437A (en) | 2017-06-22 | 2017-06-22 | A kind of twin-lens reflex formula liquid crystal vision tester for eyesight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107157437A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109820475A (en) * | 2019-02-25 | 2019-05-31 | 上海雄博精密仪器股份有限公司 | The light channel structure of interior reading formula projection vision tester for eyesight |
| CN110731750A (en) * | 2019-09-26 | 2020-01-31 | 浙江大学 | intelligent vision detection device and detection method |
| CN111227782A (en) * | 2019-03-13 | 2020-06-05 | 株式会社拓普康 | Optotype presenting apparatus and ophthalmologic apparatus |
| TWI765780B (en) * | 2021-07-16 | 2022-05-21 | 艾明康生技股份有限公司 | Vision test device, method and system and non-transient computer readable recording medium |
| EP4104748A4 (en) * | 2020-02-10 | 2023-01-18 | Shimadzu Corporation | Visual function test device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201263675Y (en) * | 2008-09-28 | 2009-07-01 | 上海彦科仪器有限公司 | Inner read type projection optometry instrument |
-
2017
- 2017-06-22 CN CN201710482255.XA patent/CN107157437A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201263675Y (en) * | 2008-09-28 | 2009-07-01 | 上海彦科仪器有限公司 | Inner read type projection optometry instrument |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109820475A (en) * | 2019-02-25 | 2019-05-31 | 上海雄博精密仪器股份有限公司 | The light channel structure of interior reading formula projection vision tester for eyesight |
| CN111227782A (en) * | 2019-03-13 | 2020-06-05 | 株式会社拓普康 | Optotype presenting apparatus and ophthalmologic apparatus |
| US11534062B2 (en) | 2019-03-13 | 2022-12-27 | Topcon Corporation | Eye chart presentation device and ophthalmologic apparatus |
| CN110731750A (en) * | 2019-09-26 | 2020-01-31 | 浙江大学 | intelligent vision detection device and detection method |
| EP4104748A4 (en) * | 2020-02-10 | 2023-01-18 | Shimadzu Corporation | Visual function test device |
| TWI765780B (en) * | 2021-07-16 | 2022-05-21 | 艾明康生技股份有限公司 | Vision test device, method and system and non-transient computer readable recording medium |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170915 |
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| RJ01 | Rejection of invention patent application after publication |