CN1035027C - Automatic measuring instrument for large-diameter lens - Google Patents
Automatic measuring instrument for large-diameter lens Download PDFInfo
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- CN1035027C CN1035027C CN95111577A CN95111577A CN1035027C CN 1035027 C CN1035027 C CN 1035027C CN 95111577 A CN95111577 A CN 95111577A CN 95111577 A CN95111577 A CN 95111577A CN 1035027 C CN1035027 C CN 1035027C
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Abstract
An automatic measuring instrument for large-aperture lens is used for measuring optical properties of optical center, spherical diopter, cylindrical diopter and axial direction, prism power and base axis, etc. in the large-aperture range of lens or contact lens. It uses scanning array light beam generator to produce multi-unit thin light beam to scan tested lens, uses Fourier transformation lens to produce polarization angle of refracted light beam, and uses photoelectric position detector to convert polarization angle signal into electric signal. The two-dimensional distribution is displayed and printed out. The invention has the advantages of large caliber, no mechanical movement, one-step real-time measurement, automatic operation, simple structure and capability of directly and accurately acquiring all optical property data in a large caliber range.
Description
The invention belongs to the photoelectron robotization detecting instrument of focal power instrument (diopter instrument) type, be mainly used in optical centre in the heavy caliber scope of lens or contact lens, spherical diopter, cylinder diopter and axially and the measurement of optical properties such as prism degree and lower shaft.Especially being suitable for the measurement of bifocal, many Jiao and zoom eyeglass optical centre position and the integral body of zoom eyeglass measures.
Up to the present, two class diopter instruments are mainly adopted in the measurement of lens optical property.The first kind is the optical apex diopter instrument, ultimate principle is taked the mode of focometer, rotate the reading handwheel during measurement and make the center of clearly observing cross curve, at this moment provided dioptric optical value on this instrument handwheel, on the instrument main axis, stamp the marking and represent the optical centre position to eyeglass.This quasi-instrument adopts eyepiece to observe or viewed in projection, accepted scale scale reading or electronic digitalizing reading.Second class is full-automatic diopter instrument, the general four light beams scan mirror that adopt, detect its deviation and can calculate diopter, on the instrument luggage carrier, place tested eyeglass during measurement and can demonstrate optical property data such as diopter, also provide simultaneously the indication of lens optical misalignment instrument major axes orientation, mobile eyeglass makes indication show that two centers meet, and at this moment correctly provides the optical property data, marks to eyeglass on the main shaft of this quasi-instrument and represents the optical centre position.This two quasi-instrument can only be measured the optical properties such as diopter of the eyeglass of this regional center representative to a zonule of eyeglass, and following shortcoming is arranged:
1. can the heavy caliber scope of eyeglass there be the step property measurement that machinery moves.
2. the optical centre position, spherical diopter, cylinder diopter, prism degree, post mirror that can not provide the large aperture lens scope in real time axially and the bidimensional of the numerical value of prism lower shaft distribute.
3. can not measure each optical centre position of bifocal, many Jiao and zoom eyeglass simultaneously.
4. can not distinguish the zoom eyeglass near reading range, look far field, zoom district and distortion district, can not measure the situation of diopter gradual change in the zoom district, can not measure the distortion situation in the distortion district.
5. can not distinguish each vision area of multi-focus lens.
6. can not show and characterize the situation of the optical property distribution in the large aperture lens scope with image mode.
Also should illustrate: multi-focus lens and zoom eyeglass also do not have special-purpose surveying instrument.
Purpose of the present invention is the problem that overcomes above-mentioned prior art, be to shine tested eyeglass successively with the parallel light pencil of the multiple-unit of scan array light-beam generator, with fourier transform lens the optical beam transformation of eyeglass refraction to photoelectric position detector, these refraction angle data are collected and handled to presentation manager with robot calculator, and can calculate the optical centre position relevant with each point by the refraction angle data on the array luminaire reference coordinate point, spherical diopter, post and diopter and axially and the numerical value of prism degree and lower shaft, therefore the whole array light-beam generator of single pass just can be tried to achieve the bidimensional distribution numerical value of the whole optical properties on the whole measurement bore, the bidimensional that can demonstrate optical property with image processing technique on display screen visually distributes, also but digitizing provides measurement result, and the two-dimensional data figure of printer output is affixed on the optical property that also can provide eyeglass on the eyeglass in real time and distributes.
Automatic measuring apparatus for large aperture lens of the present invention, at optical system upper edge light path direct of travel from scan array light-beam generator 15, be luggage carrier 5, optical filter 7, fourier transform lens 8, the photoelectric position detector 9 of putting tested eyeglass 6 successively, electronic system is to enter presentation manager 11 by photoelectric position detector 9 output electric signals by analog to digital conversion circuit 10, presentation manager 11 is linked scan array light-beam generator 15 by scan drive circuit 12, and presentation manager also has display 13 and printer 14.
One, optical system
For guaranteeing measuring accuracy, the multiple-unit light pencil of scan array light-beam generator 15 adopts the criss-cross array to arrange the output bore L of its scan array light-beam generator 15
dBe circular or square, unit light pencil occupied area compares with 1 with the duty area: 4-1: 1 is advisable, and is advisable with 1mm-5mm in the interval between the unit light pencil.For the heavy caliber that guarantees eyeglass is measured effective output bore L of scan array light-beam generator 15
dFor φ 30mm-φ 60mm is advisable, frame per second is equal to or greater than is advisable for 3 frame/seconds.
The scan array light-beam generator has multiple structure, as being made of pointolite 1, beam-expanding collimation system 2, catoptron 3 and electricity note location spatial light modulator 4; Or the monochromatic light electron gun, angular deflection device and lenticule constitute; Or bidimensional light emitting diode and micro lens array constitute; Or two-dimensional laser diode array and micro lens array constitute.
Photoelectric position detector is the position sensitive device, and for guaranteeing diopter measurement scope and measuring accuracy, its location positioning precision is better than 1/1000.
Photoelectric position detector also can be the photoelectric cell array, photodiode array, phototriode array, charge-coupled image sensor or charge injection device.For guaranteeing measuring accuracy, the probe unit of these devices adopts with the unit light pencil of scan array light-beam generator 15 and arranges the identical criss-cross arrangement of lattice shape, and it surveys effective aperture D
dAlso be circular or square, the ratio of probe unit occupied area and duty area is also with 1: 4-1: 1 is advisable, and unit number is advisable with 400 * 400-5000 * 5000.
The view picture sampling of the photoelectric position detector during for the scanning of assurance scan array light-beam generator, the sampling of whole photoelectric position detector, conversion and storage time should be less than the unit light electric switch of a unit light pencil of scan array light-beam generator or luminescent device cycle lengths.Photoelectric position detector 9 and scan array light-beam generator 15 by its geometry arrangement pattern be parallel storing as shown in Figure 4 or both angles at 45 put.
Under first kind of structure situation of above-mentioned scan array light-beam generator 15, the output bore of scan array light-beam generator should be equal to or greater than the effective aperture of electricity note location spatial light modulator 4.Beam-expanding collimation system can be that collimation lens also can be an extender lens, the combination of spatial filtering aperture and collimation lens.
For the bore with scan array light-beam generator 15 mates the effective aperture S of fourier transform lens 8
dShould effectively export bore L greater than it
dFor guaranteeing picture element, the relative aperture of fourier transform lens 8 gets 1: 1.5-1: 3 are advisable.For guaranteeing the measurement of maximum dioptric optical value, the effective aperture D of the focal distance f of fourier transform lens and photoelectric position detector array
dRatio should be equal to or less than 8: 1, i.e. f: D
d=8: 1.
For reducing noise and the generation standard wavelength that the environment parasitic light produces, add optical filter 7 or interference filter in luggage carrier 5 front and back.
Luggage carrier 5 can support tested eye eyeglass 6 or contact lens, and is used for fixing tested eyeglass 6 with telescopic stationary installation.
For writing down the position of tested eyeglass 6 on instrument, instrument has the device of telescopic printing sign.
For adjusting the placement location of tested eyeglass 6 easily, instrument has movably baffle plate near luggage carrier 5.
For dwindling the physical dimension of instrument, one or more catoptron 3 is arranged on the main shaft of optical system.
Two, electronic system
Be to guarantee scanning, sampling and calculate synchronously, presentation manager 11 is as the driving of main control computer gated sweep array light-beam generator 15, and the sampling of control photoelectric position detector 9 and the calculating executive routine of itself.So presentation manager 11 links to each other with photoelectric position detector 9 by analog to digital conversion circuit 10, presentation manager 11 links to each other with scan array light-beam generator 15 by scan drive circuit 12.
Be the store sample data, result of calculation and calculating intermediate result, presentation manager has one or more internal storage, and digitizing and bidimensional display plotter are arranged.
For guaranteeing the synchronous of sampling and processing, sampling and processing hocket.For guaranteeing that processing speed reaches real-time, storer is the internal memory of presentation manager.
Be the shape duration of each unit light pencil of being exported on the gated sweep array light-beam generator 15, scan drive circuit 12 contain equate with its unit light pencil quantity and continue the unit light electric switch or the luminescent device in cycle with the corresponding one by one control module light pencil of its unit light pencil.
The present invention has following tangible advantage:
1. can the heavy caliber scope of eyeglass there be the step property measurement that machinery moves.
2. can provide optics center on the large aperture lens scope in real time, spherical diopter, cylinder diopter, prism degree, post mirror are axially and the distribution of the bidimensional of the numerical value of prism lower shaft.
3. can measure bifocal simultaneously, each optical centre position of many Jiao and zoom eyeglass.
4. can distinguish each vision area of zoom eyeglass, can measure the situation of diopter gradual change in the zoom district, can measure the distortion situation in the distortion district.
5. can distinguish each vision area of multi-focus lens.
6. can show and characterize the situation of the optical property distribution in the large aperture lens scope with image mode.
7. measurement robotization, simple to operate.
8. measurement range is big, the precision height.
9. the master prism that does not need ancillary relief to use when prism degree is measured.
10. directly characterize the feature of many Jiao and zoom eyeglass with the print image of 1: 1 ratio.
11. kept the function of optical property on common automatic diopter instrument surveying instrument major axes orientation one zonule.
Description of drawings:
Fig. 1 is the system schematic of a kind of embodiment of automatic measuring apparatus for large aperture lens of the present invention.
Fig. 2 is the unit cell arrangement form synoptic diagram of electricity note location spatial light modulator 4.
Fig. 3 is that calculation level is arranged synoptic diagram on the object plane.
Fig. 4 is the orientation synoptic diagram of photoelectric position detector 9.
Fig. 5 is the calculation level position view.
Further describe the present invention below in conjunction with accompanying drawing
Embodiment:
As Fig. 1 is the system schematic of one embodiment of the present of invention.Lighting point light source 1 is a Halogen lamp LED.Beam-expanding collimation system 2 adopts collimation lens 2 to produce the parallel illumination light that enlarges.Catoptron 3 is to be provided with for the physical dimension of dwindling instrument.Electricity note location spatial light modulator 4 is liquid crystal devices, and array format is a criss-cross, as shown in Figure 2.Be subjected to presentation manager 11 controls and open the unit electrooptical switching that it comprises one by one.A switch produces a unit light pencil and shines the tested eyeglass 6 that is put on the luggage carrier 5 when logical, optical filter 7 elimination environment parasitic lights, produce the standard testing wavelength, fourier transform lens 8 will project on the photoelectric position detector 9 that is positioned on its back focal plane through this light beam of eyeglass refraction.Because fourier transform character, the refraction angle has just been represented in the position of this projecting beam.Photoelectric position detector spare 9 is position sensitive devices, is sampled by presentation manager 11 controls, and becomes digital signal by analog to digital conversion circuit 10.Then two coordinate signals along x axle and y axle of this beam center position are stored in the storer of presentation manager 11 into.In the full screen scanning process of electricity note location spatial light modulator 4, presentation manager 11 storages are the data of whole deflecting light beams position down.
The practical operation computing:
The relevant optical centre position of arbitrary coordinate points on the eyeglass object plane, spherical diopter, the cylinder diopter and axially and six optical quality of prism degree and lower shaft can with three that (comprise or do not comprise this point) in this object point adjacent domains not the refraction angle of the object point on same straight line obtain.
For guaranteeing measuring accuracy, should obtain the center of deflecting light beams.
For guaranteeing measuring accuracy, get four and be positioned at the object point of arranging on the square corner, as shown in Figure 3, extrapolate the optical property of central object point, or get the optical property that five object points that positive cross curve arranges are extrapolated central point.
Be the correctness that guarantees to calculate, the scanning space light-beam generator of square grid shape and photoelectric position detector are pressed equidirectional and are placed, as Fig. 2 and shown in Figure 4.
For making the bidimensional discrete points data continuously or the equipotential line data-switching, adopt Digital image processing technique to bidimensional.
For imagery ground shows the bidimensional measurement result, adopt the equipotential line of monochrome or coloud coding to represent.
For expressing the DATA DISTRIBUTION of tested eyeglass 6 on the spot, adopt 1: 1 ratio to print the equipotential line pattern.
In the system as Fig. 1, the output bore of collimation lens 2 is φ 50mm, and the bore of the unit light pencil of electricity note location spatial light modulator 4 is 0.8mm * 0.8mm, and 3.5mm effectively exports bore L at interval
dφ 50mm, the effective aperture dimension D of position sensitive detector
dBe 100mm * 100mm, resolution 1/1000.The bore of fourier transform lens 8 is φ 60mm, and focal distance f=100mm, the center processor in the presentation manager are 486,66 million, 32, and internal memory 32,000,000.
The refraction angle θ x of light beam and θ y are by its position x and y decision on the sensitive device of position, and it is:
Fig. 5 represents to be determined by the refraction angle of four liquid crystal shutter unit the synoptic diagram of the optical parametric on its center object point.The assumed calculation point coordinate be (x, y), test point coordinate be (x+ △, y), (x, y-△), (x-△, y), (x, y+ △), their refraction angle is respectively (tg θ
x(1), tg θ
y(1)), (tg θ
x(2), tg θ
y(2)), (tg θ
x(3), tg θ
yAnd (tg θ (3))
x(4), tg θ
y(4)), x, y and △ are the millimeter unit, and then intermediate variable is defined as:
E＝Ax+Cy-G
The optical property of this calculation level correspondence of F=By+Cx-H is,
The optical centre position:
The post mirror is axial:
Spherical diopter:
Post mirror diopter:
Post mirror lower shaft:
Prism degree:
Try to achieve all with reference to after the optical property on the object point, try to achieve its bidimensional equipotential line by image processing method and distribute, and show and print.
Claims (10)
1. an automatic measuring apparatus for large aperture lens contains optical system and electronic system, it is characterized in that optical system along its light path direct of travel from output bore L
dIn comprise scan array light-beam generator (15) beginning of multiple-unit light pencil, be luggage carrier (5), the optical filter (7) that supports tested eyeglass (6) successively, effective aperture S
dOutput bore L with scan array light-beam generator (15)
dThe fourier transform lens (8) that are complementary, photoelectric position detector (9), electronic system has the electric signal by photoelectric position detector (9) output to enter presentation manager (11) by analog to digital conversion circuit (10), presentation manager (11) connects and scan array light-beam generator (15) by scan drive circuit (12), and figure processor (11) also is connected with display (13) and printer (14).
2. according to the automatic measuring apparatus for large aperture lens of claim 1, it is characterized in that scan array light-beam generator (15) is made of pointolite (1), beam-expanding collimation system (2), catoptron (3) and electricity note location spatial light modulator (4); Or constituted by single beam light source, angular deflection device and collimation lens; Or two-dimentional light emitting diode array and micro lens array constitute; Or two-dimensional laser diode array and micro lens array constitute.
3. according to the automatic measuring apparatus for large aperture lens of claim 1 or 2, it is characterized in that the unit light pencil is arranged with the criss-cross array on the scan array light-beam generator (15), be spaced apart 1mm～5mm between the unit light pencil, unit light pencil occupied area is 1: 4～1: 1 with the ratio of duty area, frame per second A
f〉=3 frame/seconds.
4. according to the automatic measuring apparatus for large aperture lens of claim 1, it is characterized in that the effective aperture S of fourier transform lens (8)
dBe equal to, or greater than the output bore L of scan array light-beam generator (15)
d
5. according to the automatic measuring apparatus for large aperture lens of claim 1, it is characterized in that photoelectric position detector (9) is position sensitive device, photoelectric cell array, photodiode array, charge-coupled image sensor or charge injection device.
6. according to the automatic measuring apparatus for large aperture lens of claim 1 or 5, it is characterized in that
The probe unit array format of photoelectric position detector (9) is all identical with scan array light-beam generator (15) with dutycycle, and both are parallel storings by its geometry arrangement pattern, or put at angle at 45.
7. according to claim 1 or 4,5 automatic measuring apparatus for large aperture lens, it is characterized in that the effective aperture D of the focal distance f and photoelectric position detector (9) array of fourier transform lens (8)
dRatio be f: D
d≤ 8: 1.
8. according to the automatic measuring apparatus for large aperture lens of claim 1, it is identical with the unit light pencil quantity that comprised on the scan array light-beam generator (15) to it is characterized in that scan drive circuit (12) contains, and with the unit light pencil one by one control corresponding unit light pencil continue the unit electrooptical switching or the luminescent device in cycle.
9. according to claim 1 or 5,8 automatic measuring apparatus for large aperture lens, the sampling time that it is characterized in that the whole array of photoelectric position detector (9) is equal to or less than scan drive circuit (12) inner control scan array light-beam generator (15) and goes up unit electrooptical switching of unit light pencil or opening the duration of luminescent device.
10. according to the automatic measuring apparatus for large aperture lens of claim 1, it is characterized in that presentation manager (11) contains one or more internal memories, digitizing and bidimensional display plotter are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95111577A CN1035027C (en) | 1995-03-29 | 1995-03-29 | Automatic measuring instrument for large-diameter lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95111577A CN1035027C (en) | 1995-03-29 | 1995-03-29 | Automatic measuring instrument for large-diameter lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1122910A CN1122910A (en) | 1996-05-22 |
| CN1035027C true CN1035027C (en) | 1997-05-28 |
Family
ID=5078851
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95111577A Expired - Lifetime CN1035027C (en) | 1995-03-29 | 1995-03-29 | Automatic measuring instrument for large-diameter lens |
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| Country | Link |
|---|---|
| CN (1) | CN1035027C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4288774B2 (en) | 1999-07-23 | 2009-07-01 | セイコーエプソン株式会社 | Projection display |
| JP4606814B2 (en) * | 2004-08-30 | 2011-01-05 | 株式会社トプコン | Lens meter |
| CN101339008B (en) * | 2008-08-27 | 2010-06-02 | 中国科学院光电技术研究所 | Device for detecting K value coefficient of large-caliber paraboloidal mirror |
| CN103413235B (en) * | 2013-08-23 | 2016-05-04 | 费淞 | A kind of glasses based on internet are equipped, marketing system and marketing method |
| CN105444994B (en) * | 2015-11-13 | 2018-01-23 | 浙江工业大学 | Dura mater pressing triple prism lens prisms degree detecting system |
| CN111397852A (en) * | 2020-02-28 | 2020-07-10 | 浙江工业大学 | Intelligent detection method for prism degree of body-shaped and micro-prism lens |
| CN113483993A (en) * | 2021-05-31 | 2021-10-08 | 浙江工业大学 | Intelligent measurement system and method for prism degree of micro-prism array lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3497704A (en) * | 1966-06-08 | 1970-02-24 | Cornell Aeronautical Labor Inc | Automatic photo-culture detection system for determining the presence and location of low curvature objects in photographic data |
| US3519358A (en) * | 1967-07-06 | 1970-07-07 | Rodenstock Optik G | Apparatus for measuring optical transfer function |
| US4071297A (en) * | 1973-06-18 | 1978-01-31 | Ernst Leitz Gmbh | Method and apparatus for photoelectrically determining the position of at least one image focus plane |
| US4159164A (en) * | 1973-10-23 | 1979-06-26 | U.S. Philips Corporation | Method of eliminating errors in images derived from patterns which consist of periodically arranged individual images |
-
1995
- 1995-03-29 CN CN95111577A patent/CN1035027C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3497704A (en) * | 1966-06-08 | 1970-02-24 | Cornell Aeronautical Labor Inc | Automatic photo-culture detection system for determining the presence and location of low curvature objects in photographic data |
| US3519358A (en) * | 1967-07-06 | 1970-07-07 | Rodenstock Optik G | Apparatus for measuring optical transfer function |
| US4071297A (en) * | 1973-06-18 | 1978-01-31 | Ernst Leitz Gmbh | Method and apparatus for photoelectrically determining the position of at least one image focus plane |
| US4159164A (en) * | 1973-10-23 | 1979-06-26 | U.S. Philips Corporation | Method of eliminating errors in images derived from patterns which consist of periodically arranged individual images |
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| CN1122910A (en) | 1996-05-22 |
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