CN105116540A - Optical magnifier unlikely to cause eye fatigue - Google Patents
Optical magnifier unlikely to cause eye fatigue Download PDFInfo
- Publication number
- CN105116540A CN105116540A CN201510648059.6A CN201510648059A CN105116540A CN 105116540 A CN105116540 A CN 105116540A CN 201510648059 A CN201510648059 A CN 201510648059A CN 105116540 A CN105116540 A CN 105116540A
- Authority
- CN
- China
- Prior art keywords
- lens
- eye fatigue
- unlikely
- distance
- optical magnifier
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/002—Magnifying glasses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to an optical magnifier unlikely to cause eye fatigue. The long-term application of an existing magnifier is likely to cause the eye fatigue. The optical magnifier unlikely to cause the eye fatigue comprises a lens, wherein a middle part of the lens is thick, the periphery of the lens is thin, the upper surface of the lens is a spherical surface, the lower surface of the lens is of a plane, and the optical magnifier is characterized in that the lens is in a cylindrical shape, a distance h from the sphere center to the lower surface is equal to 3.29cm, the radius r of the spherical surface is equal to 2.6cm, and the lens is made of a transparent material with the refractive index of 1.5. The optical magnifier has the advantages of simplicity in structure and convenience in use and can be widely applied to the medical institutions such as hospitals, sanatorium and the like.
Description
Technical field
The present invention relates to the optical loupes that a kind of not easily eye is tired.
Background technology
The qualification work of the article such as banknote, financial document, painting and calligraphy all needs to be undertaken examining, identifying by magnifier.Long-time observation, user there will be visual fatigue, affects eye health.The elderly easily goes out presbyopia symptom, and blue or green few people easily occurs myopia symptoms.
In physics, during people's object too far away and too near soon, eyeball all will regulate, and namely changes the projection degree of eyeball, but has a distance that eyes be able to be made to regulate just to see clearly, and this distance is just the distance of distinct vision.That is eyes see that the object at distance of distinct vision place feels that the most comfortable, the most applicable normal eye observes nearby compared with the distance of wisp, are about 25 centimetres.
Far point: eyes completely rest time, see the maximum distance of (object) clearly.Emmetropic far point is infinity; Near point: use maximal regulated power, the point that can see clearly.If order observe to picture and observer's eye distance all the time close to the distance of distinct vision, just can protect the eye eyesight of observer to greatest extent.A difficult problem does not have such device and measure in prior art.
Summary of the invention
The technical problem to be solved in the present invention how to fill up the above-mentioned blank of prior art, provides the optical loupes that a kind of not easily eye is tired.
For solving the problems of the technologies described above, this optical loupes that not easily eye is tired, comprise lens, these lens are column, and its centre of sphere is h=3.29 centimetre to lower surface distance, and spherical radius is r=2.6 centimetre, and the transparent material being 1.5 by index of refraction is made.
Design like this, during use, lens pillar is pressed in the observed article surfaces such as banknote, financial document, painting and calligraphy, and now, object distance u=h=3.29 centimetre, is presented on user's virtual image at the moment and is positioned at below observed article.
The near point observing article due to normal person is 10 centimetres, so normal person is when using the minutia of these observed article such as banknote, financial document, painting and calligraphy that not easily eye is tired, and always to the greatest extent can near observed article.Because the near point of normal person's eyes is also at 10 cm.Observer also makes its eyes be no less than 10 centimetres apart from the distance on this not easily optical loupes summit that eye is tired, otherwise just uncomfortable.
The virtual image of observed article is about 15 centimetres to the distance of observer's eyes.Design like this, just can ensure, during use, 25 centimetres between the virtual image of user and observed article, error is no more than 3 millimeters, close to the distance of distinct vision 25 centimetres of normal person.Design like this, the qualification work of the article such as user's long campaigns banknote, financial document, painting and calligraphy, also indefatigability.
The present invention's optical loupes that not easily eye is tired has structure advantage simple, easy to use, is widely used in the medical institutions such as each large medical care, sanatorium.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, this optical loupes that not easily eye is tired is described further:
Fig. 1 is the structural representation of the present invention's not easily optical loupes that eye is tired.
In figure: extended line, a of 1 is the light, 8 crossing lens 2 centre of sphere that the eyes, 2 of observer send for article 3 to be seen for incident ray, 7 for normal, 6 for the virtual image, 5 for article to be seen, 4 for lens, 3 to be the extended line, 9 of light 7 be refracted ray, 10 that incident ray 6 is formed after lens 2 is refracted ray 9 are incident angle, β refraction angle, L
1for the eyes of observer and spacing, the L at lens 2 top
2for the distance between the eyes of observer and the virtual image, r be spherical radius, u is object distance, h is that the lens centre of sphere is to lower surface distance.
Embodiment:
Embodiment 1, as shown in Figure 1: the present invention's optical loupes that not easily eye is tired comprises lens 2, this lens 2 thick middle, periphery are thin, its upper surface is sphere, lower surface is plane, and the transparent material being 1.5 by index of refraction is made, and it is characterized in that: lens 2 are in column, its centre of sphere is h=3.29 centimetre to lower surface distance, and spherical radius is r=2.6 centimetre.Angle between incident ray 6 and crossing normal 5 is incident angle a=6 °.7 light crossing lens 2 centre of sphere sent for article 3 to be seen.8 is the extended line of light 7.
The refracted ray 9 that incident ray 6 is formed after lens 2, the angle between refracted ray 9 and crossing normal 5 is refraction angle β=arcsin (1.5 × sin6 °)=arcsin (0.156795)=9 °, and 10 is the extended line of refracted ray 9.Intersection point between extended line 8, extended line 9 just the virtual image 4 a bit.
The eyes of observer are to the distance L of the virtual image
2, the plot analysis undertaken by accompanying drawing 1: L
2/ L
1=2.5, the eyes of observer and the spacing L at lens 2 top
1when=10 centimetres, L
2=2.5 × L
1=2.5 × 10=25 centimetre.
Claims (1)
1. the optical loupes that not easily eye is tired, comprise lens, this lens thick middle, periphery are thin, its upper surface is sphere, lower surface is plane, it is characterized in that: these lens are column, and its centre of sphere is h=3.29 centimetre to lower surface distance, spherical radius is r=2.6 centimetre, and the transparent material being 1.5 by index of refraction is made.
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 true CN105116540A (en) | 2015-12-02 |
| CN105116540B 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) |
Citations (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
Patent Citations (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 |
Non-Patent Citations (1)
| Title |
|---|
| 郁道银等: "《工程光学（第3版）》", 31 July 2014, 机械工业出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105116540B (en) | 2017-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7436059B2 (en) | Eyeglasses and optical elements | |
| US10146067B2 (en) | Eye-protective shade for augmented reality smart glasses | |
| CN201752480U (en) | Eye caring instrument | |
| WO2019000983A1 (en) | Liquid crystal lens and liquid crystal glasses | |
| CN104216138A (en) | Eyeglasses | |
| KR101632156B1 (en) | Calibration lens can be seen ultra short distance | |
| CN107037592A (en) | Wear vision optimization system, intelligent terminal and the helmet of display device | |
| CN107167913A (en) | A kind of short focus eyepiece and VR wear display device | |
| US10117778B2 (en) | Goggle lens | |
| CN107529340B (en) | Ophthalmic lens and method for selecting such ophthalmic lens | |
| EP4275587A3 (en) | A computer-implemented method and system for interactively measuring ocular refractive errors, addition and power of reading glasses | |
| CN106265005A (en) | A kind of Novel ocular health-care appliance and application process | |
| CN107065198A (en) | Wear the vision optimization method of display device | |
| CN112305758A (en) | AR shows glasses | |
| CN209172676U (en) | A kind of eye-shade device for ophthalmology eye test | |
| CN205880362U (en) | Eyepiece optical system and use its little demonstration optical system | |
| CN105116540A (en) | Optical magnifier unlikely to cause eye fatigue | |
| CN107137211A (en) | The 3D vision training methods moved based on eye | |
| CN103222922A (en) | Posture correcting far-seeing eyeglasses | |
| KR101598110B1 (en) | Goggle for Image Display Having Specific Structure Newton Lens | |
| CN104662467B (en) | For the method improving the visual comfort of wearer and the active vision system being associated | |
| CN203183287U (en) | Posture straightening eye protecting instrument | |
| CN102789053B (en) | Remote reading device for alleviating visual fatigue | |
| TWI490595B (en) | Optical system for rotating liquid crystal to adjust lens focal length | |
| CN204086591U (en) | The screen mirror that the number of degrees are adjustable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170815 Termination date: 20181009 |