CN204246108U - Eyesight detecting instrument - Google Patents
Eyesight detecting instrument Download PDFInfo
- Publication number
- CN204246108U CN204246108U CN201420683801.8U CN201420683801U CN204246108U CN 204246108 U CN204246108 U CN 204246108U CN 201420683801 U CN201420683801 U CN 201420683801U CN 204246108 U CN204246108 U CN 204246108U
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- character
- convex lens
- character board
- distance
- barrel
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- 230000004438 eyesight Effects 0.000 title claims abstract description 23
- 230000000007 visual effect Effects 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000004304 visual acuity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- Eye Examination Apparatus (AREA)
Abstract
This utility model provides a kind of eyesight detecting instrument, comprises cylindrical shell, convex lens, character board and character panel seat, and convex lens is arranged at cylindrical shell one end and is contained in cylindrical shell, and character board is vertically positioned at the other end of cylindrical shell, and character board is connected with character panel seat; Character panel seat drives character board rotate on the vertical plane or move in parallel.This utility model volume is little, easy to carry and use, and use environment and do not have requirement, be convenient to accurate measurement, structure is simple, is easy to manufacture, promote.
Description
Technical Field
The utility model relates to an eyesight detection device belongs to eyes check out test set technical field.
Background
Eyesight is an important index of physical health. To detect vision, the eye chart is now used. However, the visual chart has high requirements on places, and the testee cannot finish the detection personally, so the visual chart is not beneficial to the daily visual detection of the public.
SUMMERY OF THE UTILITY MODEL
For solving the restriction of the inspection eyesight to place, light and personnel, the utility model provides a unique, the convenient to use's of structure eyesight detection device to realize accurate detection eyesight.
The utility model discloses a following technical scheme realizes: an eyesight detection device comprises a cylinder, a convex lens, a character plate and a character plate seat, wherein the convex lens is arranged at one end of the cylinder and is accommodated in the cylinder; the character board seat drives the character board to rotate or move in parallel on the vertical plane.
Further, the character board seat is mounted on a rotatable base, and the base is sleeved in the barrel and rotates by taking the optical axis of the convex lens as an axis.
Furthermore, characters, patterns or a conventional visual chart are arranged on the character board, and the character board is rectangular, circular or polygonal.
Further, when a conventional visual chart is arranged on the character board, the distance between the character board and the convex lens is adjusted according to the following formula:
l=Lf/(f+L)
wherein,l——the object distance, i.e. the distance of the character plate from the convex lens,Lthe image distance, which is the distance between the virtual image of the character board formed by the convex lens and the convex lens,f-the focal length of the convex lens.
When in useLWhen the distance is 5 meters, the detected person detects that the corresponding result is the same as the actual result obtained by detecting the distance of 5 meters from the standard visual acuity chart through the visual detection device. Determining convex lens mounting positionWhen the content is l, the content is,the image distance L ranges from 3 meters to infinity, the optimal distance is 5 meters, and the characters are driven by the character board seatThe plates are moved in parallel along the optical axis of the convex lens within 1 focal length from the convex lens. In addition, the character board seat is provided with a reading number corresponding to the character board so as to display a result corresponding to the vision test, and the inner wall of the barrel body is provided with scales so as to display the image distance.
Further, the barrel includes interior barrel and cup joints the outside outer barrel of barrel in, the large character board of area is convenient for install.
Further, a light source is arranged in the barrel.
When the tester uses, drive the character board through the rotation regulation character board seat and remove so that the image distance is 5 meters, and the formation of image is observed through convex lens to the inside of tester barrel, constantly oneself adjusts the character board seat during the test, makes the typeface on the character board adjust to the optical axis department of convex lens and reaches the formation of image, and the result that the character that can see clearly corresponds is tester's actual eyesight. In addition, the tester can also compare and detect through the detector, often observes certain character or image under certain image distance to often grasp own visual condition. In addition, when the tester is a child, in order to prevent the child from remembering the value of the visual chart in advance, parents can rotate the base, so that the orientation of characters is changed, the children can observe results after the orientation of the characters is adjusted, and the parents can really master the vision condition of the children.
The utility model has the advantages that: small volume, convenient carrying and use, no requirement on environmental use, convenient accurate measurement, simple structure and easy manufacture and popularization.
Drawings
Fig. 1 is a schematic view of the external structure of the present invention;
fig. 2 is a schematic cross-sectional structure of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, the vision testing device comprises a cylinder 2, a convex lens 1, a character plate 3 and a character plate seat 4, wherein the convex lens 1 is arranged at one end of the cylinder 2 and is accommodated in the cylinder 2, the character plate 3 is vertically arranged at the other end of the cylinder 2, and the character plate 3 is connected with the character plate seat 4; the character board seat 4 drives the character board 3 to rotate or move in parallel on the vertical plane; the character board seat 4 is arranged on a rotatable base 5, the base 5 is sleeved in the cylinder body 2 and rotates by taking the optical axis of the convex lens 1 as an axis; characters, patterns or a conventional visual chart are arranged on the character plate 3, and the character plate 3 is rectangular, circular or polygonal; the cylinder 2 comprises an inner cylinder and an outer cylinder sleeved outside the inner cylinder, so that the character board 3 with large installation area is convenient to install; a light source is arranged in the cylinder 2. When a conventional visual chart is set on the character plate 3, the distance of the character plate 3 from the convex lens 1 is adjusted according to the following formula:
l=Lf/(f+L)= 78.74mm
in the formula, the first step is that,l——the object distance, i.e. the distance of the character plate from the convex lens,Lthe image distance is 5 meters, namely the distance between the virtual image formed by the character board through the convex lens and the convex lens,f-focal length of convex lens =80 mm.
When in useLWhen the distance is 5 meters, the detected person detects that the corresponding result is the same as the actual result obtained by detecting the distance of 5 meters from the standard visual acuity chart through the visual detection device. Determining convex lens mounting positionWhen the content is l, the content is,the image distance L ranges from 3 meters to infinity, the optimal distance is 5 meters, and the character board is driven by the character board seat to move in parallel within 1 time of the focal distance from the convex lens along the optical axis of the convex lens. In addition, the character board seat is provided with a reading number corresponding to the character board so as to display a result corresponding to the vision test, and the inner wall of the barrel body is provided with scales so as to display the image distance.
When the tester uses, drive character board 3 through rotation regulation character board seat 4 and remove so that the image distance is 5 meters, and formation of image is observed through convex lens 1 to the inside of tester barrel 2, constantly oneself adjusts character board seat 4 during the test, makes the typeface on the character board 3 adjust to the optical axis department of convex lens 1 and reach the formation of image, and the result that the character that can see clearly corresponds is tester's actual eyesight. In addition, the tester can also compare and detect through the detector, often observes certain character or image under certain image distance to often grasp own visual condition. Furthermore, when the tester is a child, in order to prevent the child from remembering the value of the visual chart in advance, parents can rotate the base 5, so that the orientation of characters is changed, the children can observe results after the orientation is adjusted, and the parents can really master the vision condition of the children.
Claims (6)
1. A vision tester is characterized in that: the character plate is vertically positioned at the other end of the cylinder body, and the character plate is connected with the character plate seat; the character board seat drives the character board to rotate or move in parallel on the vertical plane.
2. A vision testing apparatus as defined in claim 1, wherein: the character board seat is installed on a rotatable base, and the base is sleeved in the barrel and rotates by taking the optical axis of the convex lens as an axis.
3. A vision testing apparatus as defined in claim 1, wherein: characters, patterns or a conventional visual chart are arranged on the character board, and the character board is rectangular, circular or polygonal.
4. A vision testing apparatus as defined in claim 1, wherein: the barrel includes interior barrel and cup joints the outside outer barrel of barrel in, the large character board of area is convenient for install.
5. A vision testing apparatus as defined in claim 1, wherein: a light source is arranged in the barrel.
6. A vision testing apparatus as defined in claim 3, wherein: when the conventional visual chart is arranged on the character board, the distance between the character board and the convex lens is adjusted according to the following formula:
l=Lf/(f+L)
in the formula, the first step is that,l——the object distance, i.e. the distance of the character plate from the convex lens,Lthe image distance, which is the distance between the virtual image of the character board formed by the convex lens and the convex lens,f-the focal length of the convex lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420683801.8U CN204246108U (en) | 2014-11-15 | 2014-11-15 | Eyesight detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420683801.8U CN204246108U (en) | 2014-11-15 | 2014-11-15 | Eyesight detecting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204246108U true CN204246108U (en) | 2015-04-08 |
Family
ID=52950470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420683801.8U Active CN204246108U (en) | 2014-11-15 | 2014-11-15 | Eyesight detecting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204246108U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137116A (en) * | 2016-08-26 | 2016-11-23 | 四川远瞻智汇科技有限公司 | A kind of vision testing method and device |
| CN109864698A (en) * | 2019-04-04 | 2019-06-11 | 河南师范大学 | A kind of Portable vision tester |
| CN112741589A (en) * | 2021-01-14 | 2021-05-04 | 沈阳视达微医疗科技有限公司 | Optical device for vision detection, vision detection system and method |
| CN112741592A (en) * | 2021-01-14 | 2021-05-04 | 沈阳视达微医疗科技有限公司 | Vision detection device and vision detection method |
-
2014
- 2014-11-15 CN CN201420683801.8U patent/CN204246108U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137116A (en) * | 2016-08-26 | 2016-11-23 | 四川远瞻智汇科技有限公司 | A kind of vision testing method and device |
| CN109864698A (en) * | 2019-04-04 | 2019-06-11 | 河南师范大学 | A kind of Portable vision tester |
| CN109864698B (en) * | 2019-04-04 | 2021-06-08 | 河南师范大学 | Portable vision tester |
| CN112741589A (en) * | 2021-01-14 | 2021-05-04 | 沈阳视达微医疗科技有限公司 | Optical device for vision detection, vision detection system and method |
| CN112741592A (en) * | 2021-01-14 | 2021-05-04 | 沈阳视达微医疗科技有限公司 | Vision detection device and vision detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |