CN204855137U - Detection apparatus for be used for progressive multifocal lens diopter - Google Patents
Detection apparatus for be used for progressive multifocal lens diopter Download PDFInfo
- Publication number
- CN204855137U CN204855137U CN201520109425.6U CN201520109425U CN204855137U CN 204855137 U CN204855137 U CN 204855137U CN 201520109425 U CN201520109425 U CN 201520109425U CN 204855137 U CN204855137 U CN 204855137U
- Authority
- CN
- China
- Prior art keywords
- eyeglass
- detected
- lens
- slit
- video camera
- 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
Links
Landscapes
- Eyeglasses (AREA)
Abstract
The utility model discloses a detection apparatus for be used for progressive multifocal lens diopter, include: along light source, slit and the camera that the optical axis set gradually, wait to detect the lens and establish between slit and camera, and follow the perpendicular to move in the work route of optical axis, be equipped with a plurality of work position on waiting to detect the work route of lens, to every work position, the camera along the optical axis removes to go on shooing in real time acquireing the video flowing, still include data processing module for to the video flowing under every work position, therefrom select the two field picture that the definition is the highest, and wait to detect the diopter of lens according to this camera position calculation who corresponds constantly. The utility model discloses a detection device, convenient to use utilizes the principle of one point sensing, only detects the lens and carries out the displacement through treating, acquires the diopter of whole lens promptly, easy operation, easily realizes.
Description
Technical field
The utility model relates to optometry technical field, is specifically related to a kind of for the dioptric pick-up unit of progressive multi-focus lens.
Background technology
Epidemiology survey shows, and myopia has become global medical science and social concern, rises year by year especially at the Asia myopia incidence of disease.In China, near-sighted morbidity rate remains high, and its students in middle and primary schools are 22.7%, and junior school student surges to 55.2%, and high school student is then increased to 70.3%, and undergraduate ratio is especially up to 80%, and myopia becomes the subject matter of puzzled China teenagers healthy growth.On the other hand, along with society progressively enters aging, increase because family planning controls Chinese population, thus cause the speed of Chinese society's aging more to accelerate, the quantity of current presbyopia patient will meet or exceed 300,000,000, and the market potential of presbyopia eyeglass is immeasurable.The appearance of progressive lens is undoubtedly a huge leap, and it is the eyeglass that a kind of focal power increases from top to bottom gradually, and along with eye-observation scope is by as far as the present, the focal power of this eyeglass increases gradually.
Opening corresponding gradual change focus lens detecting instrument and also will become much more popular along with market, if simple from foreign procurement, not only instrument and equipment is expensive, simultaneously because the operative employee of manufacturer, the optist etc. in optician's shop are subject to academic impact, it is handy to accomplish the operation of instrument.Based on above-mentioned situation, we consider the development being engaged in the testing tool detected for progressive lens specially.The burnt detecting instrument of gradual change of our research will have following several large advantage:
(1) operation interface is friendly---adopt the burnt detector function software of the gradual change of independent development;
(2) with strong points---test for domestic optician's shop and join gradual change mirror, factory's inspection gradual change mirror and designing;
(3) cheap---because independent development and remove unnecessary function so effectively can reduce price, by simple computation, market sale price is according to preliminary estimation at about 50,000 yuan;
(4) market adaptability is strong---will be easy to after product promotion by domestic optician's shop and produce eyeglass producer accept.
Along with constantly widening of progressive lens market, the product of this Project-developing also will be more and more flourishing, and it is huge that its economic results in society obtained are bound to very.
Simultaneously on technical meaning, the research also can reduce China with the external technological gap existed in association area, for China in the future can obtain long term growth in the field and establish solid foundation.
Because the diopter of progressive multi-focus lens is not identical in whole surface range, and its face shape is a kind of nonaxisymmetrical surface of revolution, therefore it is far from being enough for only measuring the point of minority or bus for whole the shape evaluating progressive multi-focus lens, point as much as possible must be recorded, obtain each parameter such as the ball luminosity put and astigmatism.More to the detection method of progressive multi-focus lens at present, main detection method has: single-spot way, Moire deflectometry, Ronchi grating method and Hartmann method.
Single-spot way can measure the diopter distributed intelligence of one, eyeglass compared with zonule central point in real time accurately, but, although single-spot way accurately can provide the information of the luminous point chosen, but it disposablely can only detect the diopter distribution at a small region center of eyeglass, but in view of progressive multi-focus lens is for the strict control of the eyeglass number of degrees, it is far from being enough for only detecting base point for the dioptric information of the whole progressive multi-focus lens of evaluation.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of for the dioptric pick-up unit of progressive multi-focus lens.
A kind of for the dioptric pick-up unit of progressive multi-focus lens, comprise the light source, slit and the video camera that set gradually along optical axis, eyeglass to be detected is located between slit and video camera, and move along the operating path perpendicular to described optical axis, the operating path of described eyeglass to be detected is provided with several working positions, for each working position, described video camera moves along described optical axis, and carries out captured in real-time acquisition video flowing.
When utilizing this pick-up unit to detect the diopter of eyeglass to be detected (i.e. progressive multi-focus lens), first eyeglass to be detected is fixed on a certain working position, then the distance between mobile camera and eyeglass to be detected, the image (slit photographed) that video camera is photographed is clear, then according to the diopter of the now position calculation eyeglass light area of video camera.
According to the diopter D of following formulae discovery eyeglass to be detected in the utility model:
Distance when x is shooting between the condenser lens of video camera and eyeglass to be detected, F is the focal length of the condenser lens of video camera, and l is the distance that slit arrives eyeglass to be detected, and H is the height of slit, H " is the height of the slit that video camera photographs.
Slit is made up of upper and lower two parts shelter, and in the utility model, slit height and the slit width of indication is two different concepts, and slit height refers in particular to the maximum distance of the lower edges of the shelter of two parts up and down of composition slit.
Because eyeglass to be detected can move, therefore according to the operating path preset, eyeglass to be detected is moved to next working position (now the light area of eyeglass is also moved accordingly), the diopter of now light area can be obtained according to the method described above.By rationally arranging working position, the diopter in all regions on eyeglass can be obtained.
As preferably, the distance in the utility model between operated adjacent position is 1mm, to guarantee the reliability of testing result.
This pick-up unit moves by making eyeglass to be detected, utilizes single-spot way to detect, and have the advantage that principle is simply clear, easy to operate, accurately can measure rapidly each dot information of eyeglass, and can completely measures the diopter of whole eyeglass.
The reference point far away of the central point of described light source, the central point of slit, eyeglass to be detected and the center, face of camera lens contour.
Described slit width is 0 ~ 2mm, and continuously adjustabe.Service condition according to distance can regulate slit width, and then obtains best test effect.As preferably, described slit width is mm.
Described slit is 20 ~ 40cm to the distance (distance along optical axis) of eyeglass to be detected.As preferably, described slit is 30cm to the distance of eyeglass to be detected.
Pick-up unit of the present utility model also comprises the first mobile platform, and described mobile platform drives eyeglass to be detected to move along the operating path of described optical axis by stepper motor.
Driving eyeglass to be detected to move by stepper motor, for ease of controlling, in the utility model, equaling the distance between adjacent two working positions with the step-length of stepper motor.
Of the present utility model for the dioptric pick-up unit of progressive multi-focus lens, also comprise and move the second mobile platform for installing video camera along described optical axis, described second mobile platform is provided with reading scale and is installed on the camera lens of the video camera of the second mobile platform and the distance of eyeglass to be detected with display.When practical application, for obtain clearly picture to, by the second mobile platform by behind the suitable position of video camera movement, manual focusing can also be carried out to video camera, namely the distance between the camera lens of video camera and eyeglass to be detected be finely tuned.Accordingly, for reducing the metrical error that manual focusing causes, the reading scale in the utility model comprises precision scale and rugosity scale, and wherein precision scale sign manual focusing makes the camera lens of video camera relative to the distance of eyeglass to be detected.Therefore, the registration of intensive reading scale is added with the registration sum of skimming reading scale the distance between camera lens and eyeglass to be detected namely obtaining video camera.
Pick-up unit of the present utility model is easy to use, does not need professional knowledge, and the principle utilizing single-point to detect, carry out displacement by means of only to eyeglass to be detected, namely obtain the diopter of whole eyeglass.
Accompanying drawing explanation
Fig. 1 is the structural representation for the dioptric pick-up unit of progressive multi-focus lens of the present embodiment;
Fig. 2 is the spectrogram of halogen tungsten lamp.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
The present embodiment for the dioptric pick-up unit of progressive multi-focus lens, comprise the light source 1, slit 2 and the video camera 3 that set gradually along optical axis as shown in Figure 1, eyeglass 4 to be detected is located between slit and video camera, and move along the operating path perpendicular to described optical axis, the operating path of eyeglass to be detected is provided with several working positions, for each working position, described video camera moves along described optical axis, and carries out captured in real-time acquisition video flowing.
Wherein, the center, face of the central point of light source 1, the central point of slit 2, the reference point far away of eyeglass to be detected 4 and video camera 3 camera lens is contour.Slit height is 10mm, and slit width is 0 ~ 2mm, and continuously adjustabe, slit is 30cm to the distance of eyeglass to be detected.
A suitable light source not only can improve image quality, and can reduce the complicacy of successive image Processing Algorithm.Consider the characteristic of the operating characteristic of eyeglass to be detected, the light sensitive characteristic of CCD camera and each light source, select halogen tungsten lamp (operating voltage 12V) as the light source in this device, carry out measuring the spectrogram that obtains as shown in Figure 2 with the USB4000 spectrometer that ocean company produces.As can be seen from the figure the wavelength coverage of light that sends of halogen tungsten lamp is mainly at 400 ~ 700nm (visible ray), extremely meets the practical application of eyeglass to be detected.
The pick-up unit of the present embodiment comprises the first mobile platform, this first mobile platform comprises eyeglass stationary fixture, screw mandrel, stepper motor and positioning circuit and forms, stepper motor drives the eyeglass to be detected be fixed on eyeglass stationary fixture to move under the effect of positioning circuit, often an a mobile step-length i.e. corresponding working position.
In the present embodiment, screw mandrel length is 11.50cm, and pitch is 1.0mm.Stepper motor model is 57BYG007-01, and design parameter is as follows: the number of phases, 4; Voltage, 12V; Electric current, 0.38A; Resistance, 32 Ω; Inductance, 30mH; Static torque, 0.35Nm; Fuselage is long, 41mm; Go out axial length, 21mm; Weight, 0.45Kg; The motor number of teeth, 50.Adopt the working method of four phase eight beat, therefore step angle is 0.9 degree.What positioning circuit adopted is that GK122 optocoupler positions.
The pick-up unit of the present embodiment also comprises the second mobile platform, and the second mobile platform manually regulates, for installing video camera.
This second mobile platform is provided with reading scale and is installed on the camera lens of the video camera of the second mobile platform and the distance of eyeglass to be detected with display.When considering practical application, for obtain clearly picture to, by the second mobile platform by behind the suitable position of video camera movement, manual focusing can also be carried out to video camera, namely the distance between the camera lens of video camera and eyeglass to be detected be finely tuned.Accordingly, for reducing the metrical error that manual focusing causes, the reading scale in the present embodiment comprises precision scale and rugosity scale, and wherein precision scale sign manual focusing makes the camera lens of video camera relative to the distance of eyeglass to be detected.Therefore, the registration of intensive reading scale is added with the registration sum of skimming reading scale the distance between camera lens and eyeglass to be detected namely obtaining video camera.
Video camera in the present embodiment is ccd video camera, and the camera lens of the video camera of corresponding the present embodiment indication is construed as the condenser lens of this ccd video camera.
The High resolution apparatus that this ccd video camera adopts THDC company to produce is as the harvester of image.This camera has the USB2.0 view output function of standard, realizes docking appearing picture with PC data, can record simultaneously, takes pictures and data preservation to microscopic sample image; The picture of shooting is clear thoroughly, color is true to nature, ground unrest is little, and resolution can reach 1600*1200; Can Automatic white balance, under different photoenvironments, keep the color rendition of object better; Under Win2000, XP and higher system, without the need to installing special driver; Machine volume is small and exquisite attractive in appearance, saves assembly space.Second mobile platform can carry ccd video camera and carry out horizontal shifting, by sharpness evaluation find the most clearly as time camera lens and eyeglass to be detected between distance calculate the diopter of eyeglass to be detected.
The diopter of eyeglass glazed thread irradiation area to be detected under distance in the present embodiment during the shooting of data processing module according to sharpness the highest image between video camera and eyeglass to be detected calculates this working position.
When eyeglass to be detected being detected based on this pick-up unit, comprise the steps:
The first step: open instrument box, is fixed on eyeglass to be detected on the fixture of the first mobile platform, then builds instrument box.
Second step: regulate slit width, be typically chosen in 0.1mm.(can finely tune according to practical situations.)
3rd step: open light source switch, by source alignment slit, and keeps light source height, adopts here and directly hang on instrument entrance slit.
4th step: open ccd video camera and function software system, eyeglass to be detected is moved on default working position, then the position of manual adjustments second mobile platform adjustment video camera, the sharpness experience of the image making it collect is fuzzy to clear, arrive fuzzy change procedure again, find position relatively the most clearly, then manual video camera is focused to obtain the highest image of sharpness (readability according to operator with micro-judgment), and the camera lens calculating now video camera according to the reading scale on the second mobile platform calculates the diopter of lens area corresponding to this working position to the distance of eyeglass to be detected.
In the present embodiment, data processing module calculates the diopter D of eyeglass to be detected by the following method:
Distance when x is shooting between the condenser lens (camera lens) of video camera and eyeglass to be detected, F is the focal length (in the present embodiment F=16mm) of the condenser lens of video camera, l is the distance that slit arrives eyeglass to be detected, H is the height of slit, H " is the height of the slit that video camera photographs.
Actual test has been carried out to Luo Dunsi get P system progressive human-like 1.6 good brilliant shield eyeglass that RodenstockGmbH company produces.This eyeglass is individual layer composite membrane, and without color and luster eyeglass, its parameter index is: refractive index n=1.597, Abbe number Vd=40.5.Test condition: light source is the halogen tungsten lamp that 12V voltage stabilizing is powered, slit width is 0.1mm, thing (i.e. slit), to the distance l=300mm of eyeglass to be detected, makes the reference point far away of eyeglass to be detected (namely the diopter of eyeglass to be detected is the point of 1000 degree) and thing, condenser lens, center, CCD face contour vertical.By regulating the position of CCD camera and focal length, obtain clear photograph (photo of slit), the distance x=85.80mm between the condenser lens (camera lens) of actual video camera when recording shooting and eyeglass to be detected.Actual measured value and calculated value basically identical (theoretical value 86.90mm), precision is 1.26%.
Above-described embodiment has been described in detail the technical solution of the utility model and beneficial effect; be understood that and the foregoing is only most preferred embodiment of the present utility model; be not limited to the utility model; all make in spirit of the present utility model any amendment, supplement and equivalent to replace, all should be included within protection domain of the present utility model.
Claims (7)
1. one kind for the dioptric pick-up unit of progressive multi-focus lens, it is characterized in that, comprise the light source, slit and the video camera that set gradually along optical axis, eyeglass to be detected is located between slit and video camera, and move along the operating path perpendicular to described optical axis, the operating path of described eyeglass to be detected is provided with several working positions, for each working position, described video camera moves along described optical axis, and carries out captured in real-time acquisition video flowing.
2. as claimed in claim 1 for the dioptric pick-up unit of progressive multi-focus lens, it is characterized in that, the reference point far away of the central point of described light source, the central point of slit, eyeglass to be detected and the center, face of camera lens contour.
It is 3. as claimed in claim 1 that for the dioptric pick-up unit of progressive multi-focus lens, it is characterized in that, described slit width is 0 ~ 2mm, and continuously adjustabe.
4. as claimed in claim 1 for the dioptric pick-up unit of progressive multi-focus lens, it is characterized in that, described slit width is 1mm.
5. as claimed in claim 1 for the dioptric pick-up unit of progressive multi-focus lens, it is characterized in that, described slit is 20 ~ 40cm to the distance of eyeglass to be detected.
6. as claimed in claim 1 for the dioptric pick-up unit of progressive multi-focus lens, it is characterized in that, also comprise the first mobile platform, described first mobile platform drives eyeglass to be detected to move along the operating path of described optical axis by stepper motor.
7. as in claim 1 ~ 6 as described in any one for the dioptric pick-up unit of progressive multi-focus lens, it is characterized in that, also comprise and move the second mobile platform for installing video camera along described optical axis, described second mobile platform is provided with reading scale and is installed on the camera lens of the video camera of the second mobile platform and the distance of eyeglass to be detected with display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520109425.6U CN204855137U (en) | 2015-02-15 | 2015-02-15 | Detection apparatus for be used for progressive multifocal lens diopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520109425.6U CN204855137U (en) | 2015-02-15 | 2015-02-15 | Detection apparatus for be used for progressive multifocal lens diopter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204855137U true CN204855137U (en) | 2015-12-09 |
Family
ID=54745676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520109425.6U Expired - Fee Related CN204855137U (en) | 2015-02-15 | 2015-02-15 | Detection apparatus for be used for progressive multifocal lens diopter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204855137U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108064355A (en) * | 2016-12-26 | 2018-05-22 | 深圳市柔宇科技有限公司 | Optical system and the method for adjusting diopter |
| CN111067499A (en) * | 2019-12-20 | 2020-04-28 | 东莞华贝电子科技有限公司 | PPG device test equipment |
| CN111351794A (en) * | 2018-12-20 | 2020-06-30 | 上海微电子装备（集团）股份有限公司 | Object surface detection device and detection method |
-
2015
- 2015-02-15 CN CN201520109425.6U patent/CN204855137U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108064355A (en) * | 2016-12-26 | 2018-05-22 | 深圳市柔宇科技有限公司 | Optical system and the method for adjusting diopter |
| CN111351794A (en) * | 2018-12-20 | 2020-06-30 | 上海微电子装备（集团）股份有限公司 | Object surface detection device and detection method |
| CN111067499A (en) * | 2019-12-20 | 2020-04-28 | 东莞华贝电子科技有限公司 | PPG device test equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104605810B (en) | A kind of for the dioptric detecting system of progressive multi-focus lens | |
| CN108956645A (en) | A kind of the optical mirror slip defect detecting device and method of more vision systems | |
| CN102053010B (en) | Device and method for testing diffuse spot and color deviation of optical system | |
| CN104851144B (en) | Crusing robot image processing system and method with the regulation of adaptive polariscope | |
| CN204855137U (en) | Detection apparatus for be used for progressive multifocal lens diopter | |
| CN109520436A (en) | A kind of butterfly spring three-dimensional dimension automatic measurement system and its measurement method based on machine vision | |
| CN107463789A (en) | A kind of integrated medical display self-checking device and its calibration method | |
| JP2002534665A (en) | Method and apparatus for measuring and mapping spectacle elements | |
| CN108204889A (en) | A kind of novel glasses optical parameter global detection method and device | |
| CN101629803B (en) | Automatic counting system and counting method of interference ring | |
| CN103728121B (en) | Multifunctional optical lens parameters detecting instrument and detection method thereof | |
| CN103439088A (en) | Method and device for using convex lens to generate collimated light | |
| CN204405004U (en) | Valve spring physical dimension measures testing machine | |
| CN106092521B (en) | A kind of high-precision object lens parfocalization detection device and detection method | |
| CN105066903A (en) | Laser three-dimensional measurement system and measurement method thereof | |
| CN106017871A (en) | High-precision large-aperture optical lens distortion calibration device and calibration method | |
| CN110823531B (en) | Digital optical bench | |
| CN105865592A (en) | Device for measuring thousand grain weight of crop grains | |
| CN205538161U (en) | Optical lens's modulation transfer function's device is measured to unlimited conjugation light path | |
| CN104777134A (en) | Gemological microscope for measuring surface refractive index of gem | |
| CN106485257A (en) | The washing detergency objective evaluation device and method that view-based access control model is perceived | |
| CN1323417C (en) | Intelligent measuring instrument for shadow mask aperture | |
| CN110044272A (en) | A kind of laser width finding centering device and application method | |
| CN205981625U (en) | Neat burnt check out test set of objective of high accuracy | |
| CN202486053U (en) | Multifunctional coal and coke microscopic analysis system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20151209 Termination date: 20200215 |