CN1023660C - Instrument for locating optical centre of lens - Google Patents
Instrument for locating optical centre of lens Download PDFInfo
- Publication number
- CN1023660C CN1023660C CN 89102206 CN89102206A CN1023660C CN 1023660 C CN1023660 C CN 1023660C CN 89102206 CN89102206 CN 89102206 CN 89102206 A CN89102206 A CN 89102206A CN 1023660 C CN1023660 C CN 1023660C
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- Prior art keywords
- optical centre
- light
- pattern plate
- orientator
- chopping board
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a positioning instrument for the center of a lens. The positioning instrument is used for optical check. The phase change rate of a tested phase object is modulated by using two pattern plates and relevant functions and is denoted in a strip mode. The relevant parameters of the tested object can be directly determined according to a stripe distribution form. The present invention provides a practical instrument for measuring the optical center and the dioptry of various lenses, zoom lens parameters and glass product defects. The present invention has the advantages of simple structure and convenient operation, and the accurate position of the optical center can be directly and vividly obtained. The practical instrument has versatility.
Description
The invention belongs to the optical detecting instrument of focal power instrument (diopter instrument) type, be mainly used in the optical centre location of various lenses, also can be used for the location, lens center, the bigness scale of eyeglass diopter, the rubber matter analysis of lens and eyeglass and the fault detection of glassware.
Up to the present, the main summit diopter instrument that adopts in the optical centre of lens location, promptly mobile eyeglass is positioned at when observing the cross curve center observed lighting pattern, stamps the marking to eyeglass and represent the optical centre position on this instrument optical axis.This traditional method is not that whole bore is measured, and following shortcoming is arranged:
1. optical centre is to be determined indirectly, and is not directly perceived, and precision is not high, during operating cost.
2. can not measure the optical centre of two eyeglasses of one pair of glasses simultaneously, therefore can not directly measure the optical center distance of one pair of glasses.
3. can not measure two light simultaneously, each optical centre of many light and zoom eyeglass.
4. can not distinguish the near reading range of zoom eyeglass, look the far field, zoom district and distortion district can not measure the zoom situation.
5. can not measure the picture element of eyeglass.
6. the defective that can not be used for glassware is observed.
Also should illustrate: the fault detection classic method of glassware is to use visualization, is not suitable for instrument, and the zoom eyeglass does not have instrumentation yet.
One of inventor had once delivered Quasiinterferometrywith coded correlation filtering(1982 on U.S. Applied Optics) Optical-correlation quasi-interferometry:a new viewpointon spatial frequency filtering(1983) two pieces of papers, a kind of new method of measuring strong variation phase object has been proposed, these papers have only been set forth principle and theory, wherein listed simple lens system is by light source, the light chart chopping board, imaging len, check pattern plate and film viewing screen are formed, has advantage of simple structure, be not suitable for optical centre location and the optical system structure parameter of zoom eyeglass lens measurement and the figure of pattern plate but provide, not constituting can be for the lens optical centralized positioning instrument of practice use.
Principle of the present invention is that each picture point light intensity is successively produced by the summation behind light chart chopping board and the check pattern plate by illumination light.In this process, light beam can combine on the corresponding object point, and when the phase change rate of measured object was zero, the picture point light intensity was proportional to the transmitance product of two pattern plate when no relative displacement.When there is phase change rate in object, light beam deflects after by object and makes the projection between two pattern plate produce relative displacement, thereby the picture point light intensity is proportional to two pattern plate transmitance products of relative displacement, in a word, variation with object respective change rate, the picture point light intensity equals the correlation integral function of two pattern plate transmittance functions, this related function is designed to the pattern distribution that the light and shade of particular requirement replaces, the mark and the striped that change of the appearance light and shade relevant then in the object picture on the film viewing screen with optical centre and phase change rate, general eyeglass, varifocal mirror and glassware all are the strong variation phase objects of each tool characteristic, and therefore the striped that produces distributes and just represented their characteristic.
Optical centre orientator of the present invention from the spread illumination light source, is the light chart chopping board successively, transparent support board, imaging len, check pattern plate and film viewing screen.
Technical solution of the present invention has two parts:
1. about optical system.
Observe as consistent for making with the object actual size, should get object image-forming magnification M1=1, for the reduction printer body amasss or observes details conveniently, the object image-forming magnification can suitably dwindle or increase, generally be advisable with M1=0.5～2, the light chart chopping board is M2 to the imaging magnification of check pattern plate, at first should make M2＜M1, for making the background illumination brightness ratio on the film viewing screen more even, should make M2=(1/3～2/3) M1.
For observing one pair of glasses, and make system axis length not oversize, the focal distance f of imaging len is got 50mm-150mm and is advisable, for making the light chart chopping board pattern that the imaging len bore can be by as much as possible, should make its relative aperture big as far as possible, generally should be greater than 1: 4.5, for guaranteeing to measure correctness and fringe contrast, the linear imaging scope that Φ 100mm～Φ 150mm should be arranged on the transparent objective table plane of imaging len front focal plane front distance f/M1 should have the linear imaging scope greater than Φ 100mm～Φ 150mm on the lighting pattern board plane of front focal plane front distance f/M2.
Be carved with scale on transparent support board or the film viewing screen to measure optical center distance, also be carved with graduation loop graph case to measure diopter, scale is the unit for desirable 1 millimeter, and graduation loop graph case is annular or grid square shape preferably.
2. about light chart chopping board and check pattern plate
Because the restriction of the relative aperture of imaging len, a certain object point had only local light chart chopping board and check pattern plate in action, therefore except that needing as described in the general principle the related function of high-contrast, still need and satisfy following specific condition, the related function of the part of the pattern of light chart chopping board and check pattern plate also should have related function complete and that have the optical centre sign.
For adapting to the needs that multi-usage is measured, the basic pattern of light chart chopping board and check pattern plate is that grid adds oblique 45 ° of " ten " words, oblique 45 ° of " ten " words equally spaced are distributed on the grid intersection point, when d is oblique 45 ° of " ten " words fork interval, graticule line is spaced apart d/M, and wherein N is the natural number greater than 1.Its autocorrelation function has similar figure.
The horizontal and vertical size of light chart chopping board is more preferably greater than one pair of glasses housing, and the check pattern plate is a doubly size of its M2.
Transparent support board to light chart chopping board distance is D, then can try to achieve D=(1/M2-1/M1) f, oblique " ten " word line spacer of light chart chopping board is d, the spacing of the oblique graticule figure that occurs in then single focus lens picture is
d′＝d/D（1000/｜Φ｜）·M1（mm）
Wherein Φ is the diopter of tested eyeglass.
Can determine clearly that for the position that makes optical centre should make in the eyeglass picture when removing oblique " ten " word of represent optical centre, other oblique " ten " word is tried one's best less even do not had.
Make the d/N that is spaced apart of light chart chopping board top lattice, graduation circle radius is r, and then shared number of squares p represents the diopter of tested eyeglass on the graduation loop diameter:
｜Φ｜＝p/2·（d/NDr）·1000×（M1）（D）
When the graduation circle is engraved on the film viewing screen, to be multiplied by M1, then not take advantage of when being engraved on the support board.
For guaranteeing measuring accuracy, require the line width of light chart chopping board to be less than or equal to 0.2d/N, the groove of check pattern plate is wide to be its M2 times.
For different application targets, also can adopt the pattern of other form, be used for center of lens as the center radiation shape pattern of periodic arrangement and measure, grating shape pattern is used for glassware fault detection etc.
After the pattern of pattern plate is selected, generally can make light chart chopping board and check pattern plate all adopt selected pattern, also can make a pattern plate adopt selected pattern, another piece is only with the better simply key pattern that can realize selected related function.
The figure of light chart chopping board and check pattern plate can all be the bright line infiltration type, and at this moment striped is bright fringes and produces bright background in the object picture.
Can one in two pattern plate be bright line transmitance type another be concealed wire transmitance type, then striped is dark fringe and produces dark background.
It is colored that two pattern plate can be one, also can two all be colored, this makes striped and background be colour.
Be further reduced volume, before and after imaging len, can use the catoptron refractive power.
The spread illumination light source can be used ordinary incandescent lamp, fluorescent light, also can use the electroluminescence planar light source.
This shows that the present invention has following obvious advantage:
1. can directly demonstrate the optical centre of eyeglass accurate and visually, particularly can show each optical centre of many Jiao and zoom eyeglass simultaneously.
2. can directly measure the optical center distance of one pair of glasses.
3. can accurately distinguish and measure the near reading range of zoom eyeglass, look the far field, zoom district and distortion district and relevant data thereof.
4. can roughly measure the diopter of eyeglass.
5. the image quality measurement that can be used for eyeglass or lens.
6. can be used for the fault detection of glassware.
Description of drawings:
Fig. 1 is the index path of an embodiment of the present invention.
Fig. 2 is the transmittance function pattern synoptic diagram of check pattern plate and light chart chopping board.
Fig. 3 is a graduation circle on transparent support board or the film viewing screen.
Fig. 4 is the optical centre synoptic diagram of one pair of glasses and carves the chi synoptic diagram.
Fig. 5 is an eyeglass diopter measurement synoptic diagram.
Fig. 6 is a Bifocal lenses optical centre synoptic diagram.
Fig. 7 is a zoom eyeglass signal bar graph.
Further describe the present invention and embodiment below in conjunction with accompanying drawing.
Fig. 1 is the index path of one embodiment of the invention.Lighting source 1 adopts incandescent lamp or fluorescent tube or adopts the electroluminescence planar light source, its illumination light chart chopping board 2, and light chart chopping board 2 and check pattern plate 8 usefulness photoetching processes are made, and also can form by chiseling pattern on metal base plate.Catoptron 3 and catoptron 7 are for the physical dimension device that dwindles instrument, imaging len 6 has two effects: the one, light chart chopping board 2 is imaged on the check pattern plate 8, the 2nd, transparent support board 4 and measured object 5 are imaged on the film viewing screen 9, for being easy to measure and compare, object image-forming magnification M1 gets 1, and the magnification M2 of 2 pairs of check pattern plates 8 of light chart chopping board gets 1/2.
Fig. 2 is the synoptic diagram of the pattern of a kind of light chart chopping board and check pattern plate.Black line is represented printing opacity, and it adds that by the criss-cross pattern oblique 45 " ten " words fork forms.Like this, related function has similar pattern.Because magnification is 1/2, thus the size of check pattern plate 8 preferably light chart chopping board 2 1/2, the picture of lighting pattern is overlapped with check pattern is strict, correct with assurance centre axle.
The focal length of imaging len 6 is got f=90mm in the embodiment system, then transparent support board 4 to the distance of light chart chopping board 2 is D=90mm, and get and measure graduation circle radius r=10mm, oblique " ten " word line spacer d=9mm in the lighting pattern, N=5 is compared at the interval of lighting pattern medium square, then occur each grid in the graduation circle and represent the 1D diopter, measure preferably annular of graduation circle, see Fig. 3.
When measured object is common single focus lens, on the film viewing screen in the picture figure similar to Fig. 2 pattern will appear, tiltedly " ten " word intersection point is represented the optical centre position, the optical center distance of two eyeglasses of one pair of glasses can be read by the chi at quarter on the transparent support board 4 that occurs on the film viewing screen, see Fig. 4, the grid size expression dioptric optical value in the eyeglass picture.This can read dioptric optical value by the number of squares that occurs in the graduation circle on the transparent support board that occurs on the film viewing screen, sees Fig. 5.
When measured object is many Jiao or zoom eyeglass, a plurality of tiltedly " ten " word point of crossing will appear in the eyeglass picture on the film viewing screen simultaneously, they representatives optical centre separately, Fig. 6 is the bifocal lenses legend.
When measured object is the zoom eyeglass, look in far field and the near reading range and the different square lattice striped of size occurs, from look the far field to the near reading range with the checker pattern of the size that occurs gradually changing, and no tangible chequer in the distortion district, can determine each vision area size and relevant parameter thus, see Fig. 7.
Measure aberration for lens or the also available Lang Qifa of general optical lens.
When measured object is glassware, the picture of this thing appears on the film viewing screen, as in have light and shade to replace candy strip, when the unusual distribution of irregular appears in striped, as the knotting, represent that then there is defective in this place.
Claims (6)
1, a kind of particularly optical centre orientator of eyeglass detection of the transparent body that is used for has light source (1), light chart chopping board (2), imaging len (6), check pattern plate (3) and film viewing screen (9), it is characterized in that:
A) said light source is an expansion light source,
B) between said light chart chopping board (2) and imaging len (6), also have transparent support board (4),
C) basic pattern of said light chart chopping board (2) and check pattern plate (8) is that grid adds oblique 45 ° of " ten " words fork, oblique 45 ° of " ten " words fork is distributed on the intersection point of graticule line equally spacedly, when d is 45 ° of " ten " word fork intervals, the graticule line spacing is d/N, wherein N is the natural number greater than 1
D) the object image-forming magnification M on the transparent support board (4)
1Be 0.5～2, the light chart chopping board is to the imaging magnification M of check pattern plate
2Be 1/3～2/3M
1,
E) focal distance f of said imaging len (6) is 50mm～150mm, and relative aperture is equal to or greater than 1: 4.5, at this imaging len front focal plane front distance f/M
1Support board (4) on the linear imaging scope of Φ 100～Φ 150mm, f/M before front focal plane are arranged
2Linear imaging scope greater than Φ 100～Φ 150mm is arranged on the pattern plate of distance (2),
F) on said transparent support board (4) or the film viewing screen (9) scale and graduation loop graph case are arranged.
2,, it is characterized in that before and after the said imaging len (6) catoptron (3) and catoptron (7) being arranged according to the optical centre orientator of claim 1.
3, according to the optical centre orientator of claim 1, it is characterized in that said M
1=1, M
2=1/2M
1
4, according to the optical centre orientator of claim 2, it is characterized in that said M
1=1, M
2=1/2M
1
5,, it is characterized in that said light chart chopping board and check pattern plate can be infiltration type, not infiltration type or colored infiltration type as the optical centre orientator of claim 1 to 4.
6, as the optical centre orientator of claim 1 to 4, it is characterized in that said light source is an incandescent lamp, or the electroluminescence planar light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102206 CN1023660C (en) | 1989-04-01 | 1989-04-01 | Instrument for locating optical centre of lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102206 CN1023660C (en) | 1989-04-01 | 1989-04-01 | Instrument for locating optical centre of lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1046389A CN1046389A (en) | 1990-10-24 |
| CN1023660C true CN1023660C (en) | 1994-02-02 |
Family
ID=4854588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102206 Expired - Fee Related CN1023660C (en) | 1989-04-01 | 1989-04-01 | Instrument for locating optical centre of lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023660C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4104427B2 (en) * | 2002-10-31 | 2008-06-18 | 日本電産サンキョー株式会社 | Optical property measuring device |
| CN100529744C (en) * | 2004-12-29 | 2009-08-19 | 鸿富锦精密工业（深圳）有限公司 | Optical detection device and detection method |
| CN103968977B (en) * | 2013-08-26 | 2016-04-20 | 深圳市斯尔顿科技有限公司 | Digital glasses measuring stress instrument |
| CN110118646B (en) * | 2019-06-04 | 2021-02-26 | 大连鉴影光学科技有限公司 | Glasses parameter detection device and method based on synthetic moire fringe technology |
-
1989
- 1989-04-01 CN CN 89102206 patent/CN1023660C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1046389A (en) | 1990-10-24 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CI01 | Correction of invention patent gazette |
Correction item: Termination of patent right Correct: delete False: G01M11/02 Number: 7 Page: 196 Volume: 10 Correction item: Termination of patent right Correct: delete False: 19890401 Number: 7 Page: 196 Volume: 10 Correction item: Termination of patent right Correct: delete False: 89102206.6 Number: 7 Page: 196 Volume: 10 |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
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