CN102928196A - Detection method and device for free-form surface lens - Google Patents
Detection method and device for free-form surface lens Download PDFInfo
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- CN102928196A CN102928196A CN2011102285026A CN201110228502A CN102928196A CN 102928196 A CN102928196 A CN 102928196A CN 2011102285026 A CN2011102285026 A CN 2011102285026A CN 201110228502 A CN201110228502 A CN 201110228502A CN 102928196 A CN102928196 A CN 102928196A
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Abstract
The invention discloses a detection method for a free-form surface lens. The detection method comprises the following steps of: (a) selecting three testing light rays from parallel light beams at clear apertures of a to-be-tested lens; (b) placing the to-be-tested lens; (c) measuring vertex power of the to-be-tested lens; and (d) measuring and storing parameters of the to-be-tested lens, namely calculating the spherical power and astigmatic degree. The detection device is novel in design and compact in structure, the detection steps are rationally designed, the detection method is simply operated, and vertex power distribution information of the whole surface form of the free-form surface lens can be detected.
Description
Technical field
The present invention relates to a kind of free surface lens, specifically, is a kind of detection method and device of free surface lens.
Background technology
To the detection of eyeglass, mainly detect with automatic lensometer at present, it is one of essential instrument of spectacles industry.Automatic lensometer partly is comprised of optical system, precision optical machinery, photoelectricity testing part (being generally ccd sensor) and electrical control etc. usually, relates to the knowledge of the aspect such as light, mechanical, electrical.The automatic lensometer single-spot way.Near its symmetry primary optical axis of eyeglass is chosen 4 luminous points, uses array image sensor, gathers the image of 4 luminous points, goes out the vertex lens power parameter of eyeglass according to the position calculation of 4 luminous points.Single-spot way can accurately provide each dot information, but the diopter distributed intelligence that it can only Real-time Measuring goes out the center, a zonule of eyeglass can not provide whole vertex lens power distributed intelligence, has limitation for detecting progressive multi-focus lens.
So-called free form surface (FREE-FORM) technology namely is used for the technology of asymmetric complicated optical design surface working.In the last few years, high-end lens industry obtained using comparatively widely technique in the world.Along with the widespread use of free surface lens, its corresponding detection technique is also at development.Because the diopter of free surface lens is not identical in whole surface range, and its face shape is a kind of nonaxisymmetrical surface of revolution, and point or the bus of therefore only measuring minority are far from being enough for whole shape estimating free surface lens.
Therefore whole shape of known usefulness automatic lensometer single-spot way detection free surface lens exists above-mentioned all inconvenience and problem.
Summary of the invention
Purpose of the present invention is to propose a kind of detection method of the free surface lens that the vertex lens power of all clear apertures is detected.
Another object of the present invention is to propose a kind of pick-up unit of the free surface lens that the vertex lens power of all clear apertures is detected.
For achieving the above object, technical solution of the present invention is:
A kind of detection method of free surface lens is characterized in that may further comprise the steps:
A, choose three the test light
At first consider the paraxial rays of eyeglass to be measured, choosing three test light in the parallel beam of the clear aperature of described eyeglass to be tested is a test cell, wherein light 1 is by the photocentre O of eyeglass to be tested, make put into eyeglass to be tested before and after light 1 constant at the facula position that array image sensor forms;
B, put into eyeglass to be tested
Put in light path before the eyeglass to be tested, incident ray 2 and 3 facula positions that form at array image sensor are distributed as B and C; Put into after the eyeglass to be measured, light generation deviation, facula position move to respectively B ' and C ' 2 points;
C, measure the vertex lens power of eyeglass to be tested
Measure respectively the vertex lens power of corresponding point D and E place on the eyeglass to be tested according to described B ' and C ' hot spot situation of movement;
D, by the parameter that array image sensor receives laggard luminous point matrix decoder analysis processor analytical calculation and stores eyeglass to be tested, comprising:
(1) calculates ball luminosity with following formula
In the formula: TA puts into the side-play amount of eyeglass front and back light 2 to be measured on array image sensor, and S is the incidence point D of incident ray 2 on eyeglass to be measured and the relative distance of photocentre O, and d is distance between eyeglass to be measured and the array image sensor, f
DBe vertex lens power, F is focal length;
(2) calculate astigmatism with following formula
S=A-B, ADS/BDC * Φ, wherein, A is ball luminosity, and B is astigmatism, and O is the photocentre of astigmatic lens, and Φ is the axle position of astigmatic lens.
The detection method of free surface lens of the present invention can also be further achieved by the following technical measures.
Aforesaid method, among the wherein said step a, the imaging that also is included in described eyeglass to be tested gathers light path, makes the variation of the luminous point matrix diagram of generation contain the vertex lens power parameter of different eyeglasses to be tested.
Aforesaid method among the wherein said step b, also comprises luminous point matrix decoder analysis processor is set, and calculates the vertex lens power parameter of eyeglass to be tested.
A kind of pick-up unit of free surface lens comprises light source generator, lens combination, and luminous point matrix encoder and array image sensor is characterized in that:
Described source of parallel light generator comprises light source and along the projection optics system of projecting light path guiding from the projection light of described light source, monochromatic light occurs;
Described collimating mirror is a lens combination, is arranged in described projecting light path, makes the incident homogeneous beam expand the parallel beam that becomes to the clear aperature of eyeglass to be tested through it;
Described luminous point matrix encoder, be arranged between described collimating mirror and the eyeglass to be tested, near symmetrical choosing on the basis of 4 luminous points primary optical axis of eyeglass, and choose many group luminous points in symmetrical extension, make luminous point cover all clear apertures of eyeglass progressive multi-focal lenses eyeglass to be tested, and arrange the luminous point matrix according to the regularity of distribution of free form surface eyeglass;
Described eyeglass to be tested is free surface lens, is arranged in the projecting light path at luminous point matrix encoder rear;
Described array image sensor, be high pixel faces array image sensor, choose high pixel more than 5,000,000, be arranged on the luminous point matrix diagram that receives the vertex lens power parameter that comprises the free form surface eyeglass that the luminous point matrix encoder occurs in the projecting light path at eyeglass to be tested rear.
The pick-up unit of free surface lens of the present invention can also be further achieved by the following technical measures.
Aforesaid device, wherein said lens combination is collimating mirror.
Aforesaid device is arranged to picture and is gathered light path near the primary optical axis of wherein said eyeglass to be tested, make the variation of the luminous point matrix diagram of generation contain the vertex lens power parameter of different free form surface eyeglass.
Aforesaid device, wherein said array image sensor are provided with luminous point matrix decoder analysis processor, calculate the vertex lens power parameter of progressive multi-focal lenses eyeglass.
After adopting technique scheme, detection method and the device of free surface lens of the present invention have the following advantages:
1, pick-up unit modern design, compact conformation;
2, detecting step is reasonable in design, simple to operate;
3, can detect the diopter distributed intelligence of whole shape of free surface lens.
Description of drawings
Fig. 1 is the measurement lens device schematic diagram of the embodiment of the invention;
Fig. 2 is that the meridional ray of the embodiment of the invention is analyzed schematic diagram;
Fig. 3 is the incidence point schematic diagram on the eyeglass to be tested of the embodiment of the invention;
Fig. 4 is the concave-sphere figure of the eyeglass to be tested of the embodiment of the invention;
Fig. 5 is the focal power figure of the eyeglass to be tested of the embodiment of the invention;
Fig. 6 is the angle figure of the eyeglass to be tested of the embodiment of the invention;
Fig. 7 is the post mirror degree figure of the eyeglass to be tested of the embodiment of the invention;
Fig. 8 is the facula position figure that each light forms at array image sensor before the placement of the embodiment of the invention eyeglass to be measured;
Fig. 9 is the facula position figure that each light forms at array image sensor behind the placement of the embodiment of the invention eyeglass to be measured.
Among the figure: 1 source of parallel light generator, 2 collimating mirrors, 3 luminous point matrix encoders, 4 eyeglasses to be tested, 5 array image sensors.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is illustrated further.
The detection method of free surface lens of the present invention is characterized in that may further comprise the steps:
Fig. 2 is that the meridional ray of the embodiment of the invention is analyzed schematic diagram.
A, choose three the test light
At first consider the paraxial rays of eyeglass to be measured, choosing three test light in the parallel beam of the clear aperature of described eyeglass to be tested is a test cell, wherein light 1 is by the photocentre O of eyeglass to be tested, make put into eyeglass to be tested before and after light 1 constant at the facula position that array image sensor forms; Also be included in and be arranged to picture near the primary optical axis of described eyeglass to be tested and gather light path, make the variation of the luminous point matrix diagram of generation contain the vertex lens power parameter of different eyeglasses to be tested.Fig. 8 is the facula position figure that each light forms at array image sensor before the placement of the embodiment of the invention eyeglass to be measured.
B, put into eyeglass to be tested
Put in light path before the eyeglass to be tested, incident ray 2 and 3 facula positions that form at array image sensor are distributed as B and C; Put into after the eyeglass to be measured, light generation deviation, facula position move to respectively B ' and C ' 2 points; Also comprise luminous point matrix decoder analysis processor is set, calculate the vertex lens power parameter of eyeglass to be tested.Fig. 9 is the facula position figure that each light forms at array image sensor behind the placement of the embodiment of the invention eyeglass to be measured.
C, measure the diopter of eyeglass to be tested
Measure respectively the diopter of corresponding point D and E place on the eyeglass to be tested according to described B ' and C ' hot spot situation of movement;
D, by the parameter that array image sensor receives laggard luminous point matrix decoder analysis processor analytical calculation and stores eyeglass to be tested, comprising:
(1) calculates ball luminosity with following formula
In the formula: TA puts into the side-play amount of eyeglass front and back light 2 to be measured on array image sensor, and S is the incidence point D of incident ray 2 on eyeglass to be measured and the relative distance of photocentre O, and d is distance between eyeglass to be measured and the array image sensor, f
DBe vertex lens power, F is focal length;
(2) calculate astigmatism with following formula
Astigmatic lens need to be known its astigmatism.Astigmatic lens can be decomposed into sphere and cylinder composition, is expressed as ADS/BDC * Φ, and wherein: ADS is diopter of correction, and BDC is astigmatism, and Φ is axis of astigmatism.Fig. 3 is the incidence point schematic diagram on the eyeglass to be tested of the embodiment of the invention.O is the photocentre of astigmatic lens, and Φ is the axle position of astigmatic lens.(m1, n1) is the incidence point D of incident ray 2 on eyeglass to be measured and the relative position of photocentre O.
By light 1 and light 2, along the vertex lens power of x and y direction be:
If variable J=100FS, S are incidence point D(m1, the n1 of incident ray 2 on eyeglass to be measured) with the relative distance of photocentre O.
Then J component Jx1 and Jy1 in the x and y direction is respectively:
With formula (3), (4) difference substitution formula (5), (6), cancellation Φ gets again:
The coordinate (m2, n2) of hot spot is the incidence point E of incident ray 3 on eyeglass to be measured and the relative position of photocentre O; (7) formula is that light 2 is with respect to light 1.
In like manner, by light 1 and light 3, can release:
(8) formula is that light 3 is with respect to light 1.
A and B can be obtained in simultaneous formula (7) and (8), and A is the maximum concave-sphere value of this measurement point, and B is the minimum concave-sphere value of this measurement point, A-B=S
LooseBe the astigmatism value of this measurement point.The angle of A and transverse axis is namely: the axle position.Can obtain astigmatism size and axis of astigmatism.Can store at last the parameters of eyeglass to be tested, comprise storage each point vertex lens power value, available graphic interpretation provides the parameter that shows free surface lens, wherein Fig. 4 is the concave-sphere figure of the eyeglass to be tested of the embodiment of the invention, Fig. 5 is the focal power figure of the eyeglass to be tested of the embodiment of the invention, Fig. 6 is the angle figure of the eyeglass to be tested of the embodiment of the invention, and Fig. 7 is the post mirror degree figure of the eyeglass to be tested of the embodiment of the invention, thereby finishes whole test procedure.
Fig. 1 is the measurement lens device schematic diagram of the embodiment of the invention.
The pick-up unit of free surface lens of the present invention comprises light source generator, collimating mirror, and luminous point matrix encoder and array image sensor is characterized in that:
Described source of parallel light generator 1 comprises light source and along the projection optics system of projecting light path guiding from the projection light of described light source, monochromatic light occurs;
Described lens combination 2 is collimating mirror, is arranged in described projecting light path, makes the incident homogeneous beam expand the parallel beam that becomes to the clear aperature of eyeglass 4 to be tested through it;
Described luminous point matrix encoder 3, be arranged between described collimating mirror and the eyeglass to be tested 4, near symmetrical choosing on the basis of 4 luminous points primary optical axis of eyeglass, and choose many group luminous points in symmetrical extension, make luminous point cover all clear apertures of eyeglass 4 progressive multi-focal lenses eyeglasses to be tested, and arrange the luminous point matrix according to the regularity of distribution of free form surface eyeglass; Near the primary optical axis of described eyeglass 4 to be tested, be arranged to picture and gather light path, make the variation of the luminous point matrix diagram of generation contain the vertex lens power parameter of different free form surface eyeglass.
Described eyeglass to be tested 4 is free surface lens, is arranged in the projecting light path at luminous point matrix encoder 3 rears;
Described array image sensor 5, it is the commercially available prod, be 5,000,000 above pixel faces array image sensors, be arranged on the luminous point matrix diagram that receives the vertex lens power parameter that comprises the free form surface eyeglass that luminous point matrix encoder 3 occurs in the projecting light path at eyeglass to be tested 4 rears; Described array image sensor 5 is provided with luminous point matrix decoder analysis processor, calculates the vertex lens power parameter of progressive multi-focal lenses eyeglass.
Above embodiment is only for explanation the present invention, but not limitation of the present invention, person skilled in the relevant technique in the situation that do not break away from the spirit and scope of the present invention, can also make various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (7)
1. the detection method of a free surface lens is characterized in that may further comprise the steps:
A, choose three the test light
At first consider the paraxial rays of eyeglass to be measured, choosing three test light in the parallel beam of the clear aperature of described eyeglass to be tested is a test cell, wherein light 1 is by the photocentre O of eyeglass to be tested, make put into eyeglass to be tested before and after light 1 constant at the facula position that array image sensor forms;
B, put into eyeglass to be tested
Put in light path before the eyeglass to be tested, incident ray 2 and 3 facula positions that form at array image sensor are distributed as B and C; Put into after the eyeglass to be measured, light generation deviation, facula position move to respectively B ' and C ' 2 points;
C, measure the vertex lens power of eyeglass to be tested
Measure respectively the vertex lens power of corresponding point D and E place on the eyeglass to be tested according to described B ' and C ' hot spot situation of movement;
D, by the parameter that array image sensor receives laggard luminous point matrix decoder analysis processor analytical calculation and stores eyeglass to be tested, comprising:
(1) calculates ball luminosity with following formula
In the formula: TA puts into the side-play amount of eyeglass front and back light 2 to be measured on film viewing screen, and S is the incidence point D of incident ray 2 on eyeglass to be measured and the relative distance of photocentre O, and d is distance between eyeglass to be measured and film viewing screen, f
DBe vertex lens power, F is focal length;
(2) calculate astigmatism with following formula
S=A-B, ADS/BDC * Φ, wherein, A is ball luminosity, and B is astigmatism, and O is the photocentre of astigmatic lens, and Φ is the axle position of astigmatic lens.
2. the detection method of free surface lens as claimed in claim 1, it is characterized in that, among the described step a, also be included in and be arranged to picture near the primary optical axis of described eyeglass to be tested and gather light path, make the variation of the luminous point matrix diagram of generation contain the vertex lens power parameter of different eyeglasses to be tested.
3. the detection method of free surface lens as claimed in claim 1 is characterized in that, among the described step b, also comprises luminous point matrix decoder analysis processor is set, and calculates the vertex lens power parameter of eyeglass to be tested.
4. the pick-up unit of a free surface lens comprises light source generator, lens combination, and luminous point matrix encoder and array image sensor is characterized in that:
Described source of parallel light generator (1) comprises light source and along the projection optics system of projecting light path guiding from the projection light of described light source, monochromatic light occurs;
Described lens combination (2) is arranged in described projecting light path, makes the incident homogeneous beam expand the parallel beam that becomes to the clear aperature of eyeglass to be tested (4) through it;
Described luminous point matrix encoder (3), be arranged between described lens combination (2) and the eyeglass to be tested (4), near symmetrical choosing on the basis of 4 luminous points primary optical axis of eyeglass, and choose many group luminous points in symmetrical extension, make luminous point cover all clear apertures of eyeglass to be tested (4) progressive multi-focal lenses eyeglass, and arrange the luminous point matrix according to the regularity of distribution of free form surface eyeglass;
Described eyeglass to be tested (4) is free surface lens, is arranged in the projecting light path at luminous point matrix encoder (3) rear;
Described array image sensor (5), be 5,000,000 above pixel faces array image sensors, be arranged on the luminous point matrix diagram that receives the vertex lens power parameter that comprises the free form surface eyeglass that luminous point matrix encoder (3) occurs in the projecting light path at eyeglass to be tested (4) rear.
5. the pick-up unit of free surface lens as claimed in claim 4 is characterized in that, described lens combination is collimating mirror.
6. the pick-up unit of free surface lens as claimed in claim 4, it is characterized in that, near the primary optical axis of described eyeglass to be tested (4), be arranged to picture and gather light path, make the variation of the luminous point matrix diagram of generation contain the vertex lens power parameter of different free form surface eyeglass.
7. the pick-up unit of free surface lens as claimed in claim 4 is characterized in that, described array image sensor (5) is provided with luminous point matrix decoder analysis processor, calculates the vertex lens power parameter of progressive multi-focal lenses eyeglass.
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Cited By (7)
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| CN103558013A (en) * | 2013-11-21 | 2014-02-05 | 苏州大学 | Method for detecting rotational-symmetry free-form surface lens |
| CN105387888A (en) * | 2015-12-10 | 2016-03-09 | 宜昌惠科科技有限公司 | Lens testing apparatus |
| CN107835935A (en) * | 2015-05-10 | 2018-03-23 | 6超越6视觉有限公司 | Determine device, system and the method for one or more optical parametrics of eyeglass |
| CN109186955A (en) * | 2018-08-30 | 2019-01-11 | 上海理工大学 | Progressive multi-focus lens distance region binary channels focal power measuring device and method |
| CN109556839A (en) * | 2019-01-08 | 2019-04-02 | 江苏明月光电科技有限公司 | A kind of more optical axis progressive multi-focus lens focal power measuring systems and method |
| CN110346364A (en) * | 2019-07-23 | 2019-10-18 | 重庆远视科技有限公司 | A kind of vertometer and its measurement method to eyeglass torsion resistance |
| CN113008528A (en) * | 2021-03-10 | 2021-06-22 | 大连鉴影光学科技有限公司 | Multi-point focal power measuring method for automatically identifying lens type based on eye field principle |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558013A (en) * | 2013-11-21 | 2014-02-05 | 苏州大学 | Method for detecting rotational-symmetry free-form surface lens |
| CN103558013B (en) * | 2013-11-21 | 2015-11-18 | 苏州大学 | A kind of detection method of Rotational Symmetry free-form surface lens |
| CN107835935A (en) * | 2015-05-10 | 2018-03-23 | 6超越6视觉有限公司 | Determine device, system and the method for one or more optical parametrics of eyeglass |
| CN105387888A (en) * | 2015-12-10 | 2016-03-09 | 宜昌惠科科技有限公司 | Lens testing apparatus |
| CN109186955A (en) * | 2018-08-30 | 2019-01-11 | 上海理工大学 | Progressive multi-focus lens distance region binary channels focal power measuring device and method |
| CN109556839A (en) * | 2019-01-08 | 2019-04-02 | 江苏明月光电科技有限公司 | A kind of more optical axis progressive multi-focus lens focal power measuring systems and method |
| CN109556839B (en) * | 2019-01-08 | 2024-04-02 | 明月镜片股份有限公司 | Multi-visual axis progressive addition lens focal power measurement system and method |
| CN110346364A (en) * | 2019-07-23 | 2019-10-18 | 重庆远视科技有限公司 | A kind of vertometer and its measurement method to eyeglass torsion resistance |
| CN110346364B (en) * | 2019-07-23 | 2021-12-14 | 重庆远视科技有限公司 | Lensometer and method for measuring torsional degree of lens by lensometer |
| CN113008528A (en) * | 2021-03-10 | 2021-06-22 | 大连鉴影光学科技有限公司 | Multi-point focal power measuring method for automatically identifying lens type based on eye field principle |
| CN113008528B (en) * | 2021-03-10 | 2022-07-29 | 大连鉴影光学科技有限公司 | Multi-point focal power measuring method for automatically identifying lens type based on eye field principle |
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