CN2133003Y - Glasses with narrow aperture - Google Patents
Glasses with narrow aperture Download PDFInfo
- Publication number
- CN2133003Y CN2133003Y CN 92218253 CN92218253U CN2133003Y CN 2133003 Y CN2133003 Y CN 2133003Y CN 92218253 CN92218253 CN 92218253 CN 92218253 U CN92218253 U CN 92218253U CN 2133003 Y CN2133003 Y CN 2133003Y
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- glasses
- aperture
- narrow aperture
- utility
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- Expired - Fee Related
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Abstract
The utility model discloses a pair of glasses with narrow aperture which is a special vision aid used for patients of amblyopia and low eyesight improving visual acuity, belonging to a medical rehabilitation instrument. The narrow aperture corresponding to an aperture optical stop controls the direction of a principal ray of the image space, thereby, limiting the incidence of stray light. In order to achieve the aim of enabling both eyes of each person of different interpupillary distances synchronically to align to the aperture optical stop, besides the aperture optical stop is made into a narrow aperture, a notch is arranged at the middle part of the glass surface, and a stipule of the glasses can move up and down in the notch so as to obtain an optimum focusing position and then the stipule is fixed by a screw. The utility model has the advantages of simple structure, convenient operation and no side effect, and the visual acuity can be improved about 30% after wearing the utility model.
Description
Glasses with narrow aperture is a kind of typoscope that amblyopia and low eyesight patient improve eyesight that aims at, and belongs to the medical rehabilitation apparatus.
According to incomplete statistics, have tens million of amblyopias and low eyesight patient at least in China, their eyesight and the visual field all are lower than normally, common typoscope all has optical mirror slip, because restrictions such as the absorption of optical mirror slip and size, when obtaining than high magnification, also bring the visual field to diminish, enter the problem of the luminous energy deficiency of eye pupil; Popular in the market Micropole glasses, because the interpupillary distance position of each eye is not quite similar, thus want binocular while alignment light hurdle very difficult, thereby light-inletting quantity can not reach synchronously, if improper use, its effect is run counter to desire.
Task of the present utility model is to design a kind of Glasses with narrow aperture that does not have the optics eyeglass, is suitable for amblyopia and low eyesight patient use, and after the patient put on these glasses, eyesight can be significantly improved.
This Glasses with narrow aperture structure is seen accompanying drawing 1
1-mirror pin 2-minute surface 3-slit
4-notch 5-stipule 6-screw
Because this Glasses with narrow aperture does not have optical mirror slip, certainly also just there are not problems such as luminous energy absorption and lens dimension restriction, it can play and help the effect of looking to be based on such principle: on the minute surface 2 of this glasses, there are two slits 3 its left and right sides, in fact this is exactly the light hurdle in the optical system, the effect on normal light hurdle is that restriction enters some imaging light in the optical system, reaches to make imaging clear and reduce the purpose of parasitic light.For the low eyesight patient of great majority, their visual angle resolution or linear resolution all are significantly less than the normal person, so they are difficult to differentiate the details of a width of cloth drawing; Here be illustrated by accompanying drawing 2: AB is a distant objects, low eyesight patient's crystal 7 is defective, therefore be difficult to make space object to become a distinct image by it, in order to overcome this defective, approach on the crystal focal point F position in the place ahead of eyes, settle an aperture diaphragm 8, it is equivalent to the slit in these glasses, aperture diaphragm can be controlled the direction of picture side chief ray BF, because chief ray has been concentrated about 70% of using light flux, therefore limited the incident of parasitic light greatly, if at this moment object AB is because crystal is regulated deficiency or excess enthalpy, what cause object can not be imaged on the retina as A ' B ', that then obtain on retina is A " B ", Here it is disc of confusion 9, but because picture side's chief ray parallel optical axis, so distance A at disc of confusion center " B " and actual equating as A ' B ' so just can not cause the parallax that is difficult to see clearly because of crystal defect.Because the interpupillary distance size of each eye is not quite similar, in order to reach the binocular purpose on alignment light hurdle synchronously, the technical scheme that these glasses are taked has following two kinds of measures: 1. the aperture diaphragm of minute surface 2 left and right sides is made slit 3, the length a of slit 3 is 10～20mm, and width b is 0.8～2.0mm; 2. establish a notch 4 in the middle of minute surface 2, stipule 5 can move up and down in notch 4, after moving on to the light optimum position, is fixed by screw 6.Minute surface 2 available metals are made, also available plastic production.
The advantage of Glasses with narrow aperture is: simple in structure, easy to use, wear with the back eyesight and can improve about 30%, and without any side effects.
Embodiment: 1 be illustrated in conjunction with the accompanying drawings, adopt the mirror pin 1 of plastic production, minute surface 2 adopts the brass of surperficial titanizing to make, slit 3 length a are 15mm, width b is that 1.2mm equates with minute surface 2 thickness, is provided with notch 4 at minute surface 2 middle parts, and stipule 5 can suitably move up and down in notch 4, when transferring to slit when just in time relative, be fixed by screw 6 with pupil position.When general amblyopia or low eyesight patient used this mirror, its eyesight can improve about 30%.
Claims (2)
1, a kind of Glasses with narrow aperture is made up of mirror pin, minute surface, stipule, it is characterized in that being provided with slit 3 in the left and right sides of minute surface 2, and stipule 5 and fixing by screw 6 is arranged in the groove 4 at minute surface 2 middle parts.
2, Glasses with narrow aperture according to claim 1, the length a that it is characterized in that slit 3 are that 10～20mm, width b are 0.8～2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92218253 CN2133003Y (en) | 1992-07-04 | 1992-07-04 | Glasses with narrow aperture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92218253 CN2133003Y (en) | 1992-07-04 | 1992-07-04 | Glasses with narrow aperture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2133003Y true CN2133003Y (en) | 1993-05-12 |
Family
ID=33765815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92218253 Expired - Fee Related CN2133003Y (en) | 1992-07-04 | 1992-07-04 | Glasses with narrow aperture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2133003Y (en) |
-
1992
- 1992-07-04 CN CN 92218253 patent/CN2133003Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |