CN105116540B - It is difficult the tired optical loupes of eye - Google Patents
It is difficult the tired optical loupes of eye Download PDFInfo
- Publication number
- CN105116540B CN105116540B CN201510648059.6A CN201510648059A CN105116540B CN 105116540 B CN105116540 B CN 105116540B CN 201510648059 A CN201510648059 A CN 201510648059A CN 105116540 B CN105116540 B CN 105116540B
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- CN
- China
- Prior art keywords
- lens
- tired
- eye
- centimetres
- difficult
- 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.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/002—Magnifying glasses
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The tired optical loupes of eye are difficult the present invention relates to a kind of.Existing magnifying glass use time length, eyes are easily tired.Therefore, being originally difficult the tired optical loupes lens of eye includes lens, the lens thick middle, periphery are thin, and its upper surface is sphere, and lower surface is plane, it is characterised in that：The lens are in the form of a column, and its centre of sphere to lower surface distance is h=3.29 centimetres, and spherical radius is r=2.6 centimetres, is made up of index of refraction of 1.5 transparent material.The present invention, which is difficult the tired optical loupes of eye, to be had the advantages that simple in construction, easy to use, is widely used in the medical institutions such as major medical cares, sanatorium.
Description
Technical field
The tired optical loupes of eye are difficult the present invention relates to a kind of.
Background technology
The appraisal of banknote, financial document, painting and calligraphy and other items is required for being examined by magnifying glass, identified.
Observe for a long time, visual fatigue occurs in user, influence eye health.Middle-aged and old easily to go out presbyopia symptom, the few people of green grass or young crops is easy
There are myopia symptoms.
In physics, during the too remote soon and too near object of people, eyeball will be adjusted, that is, change the prominent of eyeball
The degree of rising, but there is a distance to make eyes without adjusting with regard to that can see, this distance is just the distance of distinct vision.That is
The object that eyes are seen at the distance of distinct vision is to feel the distance that most comfortable, most suitable normal eye observes nearby compared with wisp, about
For 25 centimetres.
Far point:During the complete rest of eyes, the maximum distance of (object) is seen.The far point of emmetropia is infinity；Near point:
Using maximal regulated power, the point that can be seen.If order is observed to picture with observer's eye distance all the time close to the distance of distinct vision,
The eye eyesight of observer can be just protected to greatest extent.Problem is in the prior art without such device and measure.
The content of the invention
The technical problem to be solved in the present invention is how to fill up the above-mentioned blank of prior art to be difficult eye there is provided one kind tired
Optical loupes.
In order to solve the above technical problems, be originally difficult the tired optical loupes of eye, including lens, the lens are in the form of a column, its
The centre of sphere to lower surface distance is h=3.29 centimetres, and spherical radius is r=2.6 centimetres, by the transparent material system that index of refraction is 1.5
Into.
It is so designed that, in use, lens pillar is pressed in the observed article surface such as banknote, financial document, painting and calligraphy, now,
U=h=3.29 centimetres of object distance, is presented on user's virtual image at the moment and is located at below observed article.
Due to normal person observe article near point be 10 centimetres, so normal person using be originally difficult the tired banknote of eye,
During the minutia of the observed article such as financial document, painting and calligraphy, always close article can be observed to the greatest extent.Because of normal person's eyes
Near point also in 10 cms.Observer also makes its eye many away from the distance for being originally difficult the tired optical loupes summit of eye
It is otherwise just uncomfortable in 10 centimetres.
The distance of observed article to observer's eyes is about 15 centimetres.It is so designed that, it is ensured that, in use, using
About 25 centimetres of the distance between virtual image of the eyes of person and observed article, close to 25 centimetres of the distance of distinct vision of normal person.Such as
This is designed, the appraisal of user's long campaigns banknote, financial document, painting and calligraphy and other items, is not easy to fatigue.
The present invention, which is difficult the tired optical loupes of eye, to be had the advantages that simple in construction, easy to use, is widely used in each
The medical institutions such as big medical care, sanatorium.
Brief description of the drawings
It is described further below in conjunction with the accompanying drawings to being originally difficult the tired optical loupes of eye：
Fig. 1 is the structural representation that the present invention is difficult the tired optical loupes of eye.
In figure：1 be the eyes of observer, 2 be lens, 3 be article to be seen, 4 be the virtual image, 5 be normal, 6 be incident ray,
7 be article 3 to be seen send the light for crossing the centre of sphere of lens 2,8 be the extended line of light 7,9 be incident ray 6 after lens 2
The fringence of formation, 10 are that the extended line of fringence 9, a are incidence angle, β refraction angles, L1Pushed up for the eyes and lens 2 of observer
Distance, L between portion2The distance between eyes and virtual image for observer, r are that spherical radius, u are object distance, h be the lens centre of sphere extremely
Lower surface distance.
Embodiment：
Embodiment 1, as shown in Figure 1：The present invention, which is difficult the tired optical loupes of eye, to be included in the middle of lens 2, the lens 2
Thick, periphery is thin, and its upper surface is sphere, and lower surface is plane, is made up of index of refraction of 1.5 transparent material, it is characterised in that：
Lens 2 are in the form of a column, and its centre of sphere to lower surface distance is h=3.29 centimetres, and spherical radius is r=2.6 centimetres.Incident ray 6 and phase
Angle between the normal 5 of friendship is a=6 ° of incidence angle.7 be the light for crossing the centre of sphere of lens 2 that article 3 to be seen is sent.8 be light
The extended line of line 7.
The fringence 9 that incident ray 6 is formed after lens 2, the angle between fringence 9 and the normal 5 intersected is refraction
Angle beta=arcsin (1.5 × sin6 °)=arcsin (0.156795)=9 °, 10 be the extended line of fringence 9.Extended line 8, prolong
The intersection point exactly virtual image 4 between long line 9 a bit.
The eyes of observer are to the virtual image apart from L2, the plot analysis carried out by accompanying drawing 1：L2/L1=2.5, observer's
Apart from L between eyes and the top of lens 21At=10 centimetres, L2=2.5 × L1=2.5 × 10=25 centimetres.
Claims (1)
1. a kind of be difficult the tired optical loupes of eye, including lens, the lens thick middle, periphery are thin, and its upper surface is sphere,
Lower surface is plane, it is characterised in that：The lens are in the form of a column, and its centre of sphere to lower surface distance is h=3.29 centimetres, spherical radius
For r=2.6 centimetres, it is made up of index of refraction of 1.5 transparent material, lens pillar is pressed in observed article surface, observer's
Apart from L between eyes and lensed tip1At=10 centimetres, the eyes of observer are to the virtual image apart from L2=25 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510648059.6A CN105116540B (en) | 2015-10-09 | 2015-10-09 | It is difficult the tired optical loupes of eye |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510648059.6A CN105116540B (en) | 2015-10-09 | 2015-10-09 | It is difficult the tired optical loupes of eye |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105116540A CN105116540A (en) | 2015-12-02 |
| CN105116540B true CN105116540B (en) | 2017-08-15 |
Family
ID=54664566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510648059.6A Expired - Fee Related CN105116540B (en) | 2015-10-09 | 2015-10-09 | It is difficult the tired optical loupes of eye |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105116540B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB434982A (en) * | 1933-06-07 | 1935-09-12 | Sendlinger Optische Glaswerke | Improvements in magnifying glasses |
| GB441995A (en) * | 1934-10-11 | 1936-01-30 | Emil Busch Ag Optische Ind | Improvements in magnifying glasses |
| GB442060A (en) * | 1935-04-30 | 1936-01-31 | Alfred Henry Emerson | Optical magnifying device |
| CN201107467Y (en) * | 2007-09-30 | 2008-08-27 | 石铠源 | Reading magnifying glasses for magnifying image edge without distortion |
-
2015
- 2015-10-09 CN CN201510648059.6A patent/CN105116540B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105116540A (en) | 2015-12-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170815 Termination date: 20181009 |
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| CF01 | Termination of patent right due to non-payment of annual fee |