CN1519558A - Device for measuring transmission factor of optical glass - Google Patents

Abstract

The invented measuring device consists of standard light source, signal amplifier, AD sampling tube, computer and display. Characters of the invention are that optical-electrical converter composed of narrow slit grating, beam splitter prism and photoelectric coupler CCD is setup at output end of the standard light source. Electric signal through AD sampling tube and treatment of computer is displayed on a display or printed out from printer. Multifold devices, which are accorded with national and trade standard specifications, for testing optical lenses can be developed from the invention. The invention features of accuracy, instant, and direct so that the invented device is affordable and available for optical shops and consumers.

Description

Optical mirror slip transmittance measurement mechanism

Technical field

The present invention relates to a kind of device of measuring the eyeglass transmittance, particularly about fast, accurately measuring the device of optical mirror slip printing opacity ratio.

Background technology

The lens quality of products such as the vision correction of myopia or long sight, eye protection glasses is related to user's healthy protect, and country and industry have higher requirements to the light transmission of various optical mirror slips.The method and apparatus that is used to measure the printing opacity ratio at present reduces three classes, and the first is directly measured, and promptly uses the light of wavelength at interval, and the transmittance of test sample is measured on a section one section ground in the 280nm-780nm wave band; It two is with the spectral transmittance of spectrophotometer measurement zero diopter sample in the 280nm-780nm wavelength band; It three is to utilize specific light source and color filter to obtain the measuring beam of ultraviolet band, and by the irradiation sample, judgement sample is in the transmittance of this wave band fast.Above-mentioned first and second class optical mirror slip transmittance measurement mechanism and method meet the regulation of optical mirror slip transmittance country and industry standard, and testing result is accurate, but the detecting instrument price is very high, the use cost height, and detection speed is slow, is difficult in optical mirror slip production and sales situ configuration and use.The 3rd class is because the specific light source condition restriction, can not be accurately and the transmittance of quantitative measurment optical mirror slip, can only be used for observational measurement, the apparatus and method of therefore above three classes can't be used at optical mirror slip production and selling scene, thereby can't guarantee the quality of eyeglass.CN1375690A discloses a kind of method and apparatus of measuring light transmissivity, though it can measure the transmittance of the optical lens of refractive optical power, but can not realize accurate measurement, and still adopt an interference light filter section one section ground in limited wave band to measure, during check fee, slow-footed problem is still unresolved, can't use at the production and selling scene.CN1357845A discloses a kind of photoelectric coupled device imaging edge detection calculation method, shows that the photoelectric coupled device imaging technique tends to reach perfection, for the present invention's design provides the basic theories basis.

Summary of the invention

Purpose of the present invention designs a kind of instrument that can accurately measure the eyeglass transmittance rapidly at the existing problem of above-mentioned eyeglass transmittance measurement mechanism, provides production and selling on-the-spot use, with the quality of control and stable optical eyeglass.

The technical solution used in the present invention is: optical mirror slip transmittance measurement mechanism, it comprises a standard sources, one signal amplifier, the AD sampling thief, computing machine and display is characterized in that establishing the narrow slit grating at the light output end of standard sources, establish Amici prism at the light output end of narrow slit grating, establish photoelectrical coupler CCD at the light output end of Amici prism, the signal amplifier input end links to each other with the electrical signal of photoelectrical coupler CCD.

Theoretical foundation of the present invention is linear array photoelectrical coupler CCD (C D) all has induction to the light of various wavelength, each pixel in the last numerous pixels of CCD can both be offered an explanation the light wave that receives, the application prism becomes to project on the diverse location of CCD by the tactic colour light band of the length of wavelength with the spectral resolution of light source all-wave, because CCD can receive and distinguish the power that receives different wavelengths of light, and convert corresponding electric signal to according to this different wave length order and power thereof, this electric signal can pass through digitized processing, tries to achieve various transmittance by Computer Processing.

The principle that the present invention measures the optical mirror slip transmittance is that standard sources has been sent all band spectrum that comprises the 280nm-780nm wavelength coverage, it becomes a very narrow elongated optical projection to prism by the narrow slit grating, refraction action by prism is the different colored banded striation of arranging in turn by wavelength length with this full wave photolysis, and, ultraviolet etc. red, orange, yellow, green, blue, blue or green, purple to be followed successively by from top to bottom projects the top-down diverse location of CCD in proper order.Because line array CCD generally all has 2000-5000 pixel, distance between each pixel is generally about 10nm, like this by selecting different pixels, can offer an explanation the exposure intensity of different wave length on CCD, therefore CCD can be gone up the light signal that whole pixels receive and become electric signal, amplify the AD sampling through signal, computing machine is handled by the program of setting, the output measurement result.

Because the applied line array CCD photoelectrical coupler of the present invention pixel is numerous, and each pixel can both offer an explanation received light signal power separately, so it is very strong to the resolution of light wave.Allow it be received from the light wave of 250-900nm, then the light wave of every 1nm on average has 3 pixels on the CCD, can satisfy relative national standards and code requirement fully, be that wavelength error is no more than ± 1nm, distinguish visible light 380nm-780nm wave band, medium wave ultraviolet B 280nm-315nm wave band, long wave ultraviolet A315nm-380nm wave band.Also can detect with the segmentation that requires that the sample interval is no more than 10nm, 5nm.Calculating function in the pick-up unit of the present invention is weighted integration and calibration, has the Automatic Program calculation function fast and accurately by establishment, and operation result is shown on the display screen in real time.

Description of drawings

Fig. 1 is a structural representation block diagram of the present invention.

Fig. 2 is for measuring the optical mirror slip view.

Fig. 3 is a kind of embodiment synoptic diagram of the present invention.

Fig. 4 is another kind of embodiment synoptic diagram.

Fig. 5 is an eyeglass analyser synoptic diagram.

Fig. 6 is a transmittance photometric road synoptic diagram in the eyeglass instrument.

Among the above-mentioned figure, 1 is standard sources, and 2 is the narrow slit grating, and 3 is Amici prism, 4 is linear array photoelectricity CCD, and 5 is electric signal amplifier, and 6 is the AD sample circuit, and 7 is single chip circuit, 8 is Output Display Unit, and 9 is eyeglass to be measured, and 11 is display screen, 12 are function indication frame, and 13 dial key for kinetic energy, and 14 insert a mouth switch for eyeglass, 15 for eyeglass inserts mouth, and 16 is support, and 17 is eyeglass bearing (lensmeter), 18 is transmittance meter box, and 19 is catoptron I, and 20 is catoptron II

Embodiment and embodiment summary

Below in conjunction with description of drawings structure of the present invention, measurements and calculations method.

As shown in Figure 1, standard sources 1 is all band spectrum that comprises the 280nm-780nm wavelength, narrow slit grating 2 is the narrow slit diffraction grating, Amici prism 3 makes all band light that comprises the 280nm-780m wavelength carry out beam split, and linear array photoelectrical coupler 4 is selected APD3734ACY for use, and electric signal amplifier 5 is selected LM318 for use, AD sample circuit 6 is selected TLC5510 for use, single-chip microcomputer 7 is selected TMS320F240 for use, when Output Display Unit is selected LMBGAN32S48CK for use, promptly can be assembled into as Fig. 3 or device shown in Figure 4.

As shown in Figure 2, when between standard sources 1 and narrow slit grating 2, putting into tested optical mirror slip 9, can block ultraviolet as tested eyeglass, then to have lacked following ultraviolet that part of for the light belt by prism, and measurement mechanism promptly obtains transmittance τ by calculating _V, solar ultraviolet A band transmittance τ _SUVAWith solar ultraviolet B wave band transmittance τ _SUVBEtc. testing result.

The luminous flux that sees through object and the ratio of incident flux are defined as the transmittance of optical mirror slip.

1, the transmittance of optical lens is calculated as follows:

2, ultraviolet waves A (315nm-380nm spectral region) average transmittance is calculated as follows:

${\mathrm{\τ}}_{\mathrm{UVA}}=\frac{1}{(380-315)\mathrm{nm}}\·{\∫}_{315\mathrm{nm}}^{380\mathrm{nm}}\mathrm{\τ}\left(\mathrm{\λ}\right)\·\mathrm{d\λ}\×100\%\·\·\·\·\left(2\right)$

3, solar ultraviolet A (315nm-380nm) wave band transmittance τ (λ) is calculated as follows with the weighted mean transmittance of ES λ (λ) and S (λ):

${\mathrm{\τ}}_{\mathrm{SUVA}}=\frac{{\∫}_{315\mathrm{nm}}^{380\mathrm{nm}}\mathrm{\τ}\left(\mathrm{\λ}\right)\·{\mathrm{\&Egr;}}_{\mathrm{S\λ}}\left(\mathrm{\λ}\right)\·S\left(\mathrm{\λ}\right)\·\mathrm{d\λ}}{{\∫}_{315\mathrm{nm}}^{380\mathrm{nm}}{\mathrm{\&Egr;}}_{\mathrm{S\λ}}\left(\mathrm{\λ}\right)\·S\left(\mathrm{\λ}\right)\·\mathrm{d\λ}}\×100\%\·\·\·\·\·\·\left(3\right)$

4, the spectral transmittance τ (λ) of solar ultraviolet B (280nm-315nm) wave band and ES λ (λ)

And the weighted mean transmittance of S (λ) is calculated as follows:

${\mathrm{\τ}}_{\mathrm{SUVB}}=\frac{{\∫}_{280\mathrm{nm}}^{315\mathrm{nm}}\mathrm{\τ}\left(\mathrm{\λ}\right)\·{\mathrm{\&Egr;}}_{\mathrm{S\λ}}\left(\mathrm{\λ}\right)\·V\left(\mathrm{\λ}\right)\·S\left(\mathrm{\λ}\right)\·\mathrm{d\λ}}{{\∫}_{280\mathrm{nm}}^{315\mathrm{nm}}{\mathrm{\&Egr;}}_{\mathrm{S\λ}}\left(\mathrm{\λ}\right)\·S\left(\mathrm{\λ}\right)\·\mathrm{d\λ}}\×100\%\·\·\·\·\·\·\left(4\right)$

The spectral transmittance of τ (λ)-eyeglass

Average human eye spectral luminous efficiency function (defining among the ISO/CIE10527) under V (λ)-daylight

S _D65The spectral distribution function (defining among the ISO/CIE10526) of λ (λ)-standard sources D65

E _{S λ}(λ)-spectral distribution function of solar radiation

The relative spectral efficiency function of S (λ) UV radiation

Embodiment 1, optical mirror slip transmissivity meter, 280nm-780nm light source narrow slit grating and 2000 pixel CCD of Amici prism photoelectrical coupler, be equipped with 8 figure place single-chip microcomputers and charactron and show the average transmittance meter of forming full wave average transmittance or ultraviolet band, be suitable for selling the shop and use.

Embodiment 2 (as shown in Figure 3 and Figure 4), medium-to-high grade optical mirror slip transmittance meter, select 280nm-780nm standard sources, narrow slit grating and Amici prism, line array CCD photoelectrical coupler for use, join TMS320F240 single-chip microcomputer, teletron or LCDs, be used for measuring light transmittance τ _v, the weighted mean transmittance τ of solar ultraviolet A _SUVAWeighted mean transmittance τ with solar ultraviolet B _SUVB, also can pass through button 13 input spectrum scopes, show the average transmittance of this spectral range, can show the transmittance curve in the full spectral range in addition, simultaneously configurable printer, print output data and curve.Fig. 3 is vertical eyeglass transmittance meter, and Fig. 4 is horizontal eyeglass transmittance meter.Display screen 11 can be teletron or LCDs among the figure, function display box 12, and function is dialled key 13, shows the project such as the τ that will test _vOr other.When an eyeglass insertion mouthful switch 14 is pressed, tested eyeglass can be put into, enter automatically to measure in the light path and test.Light source, grating, prism and ccd sensor are enclosed in the measurement light path of support 16 and divide in the mirror.

Embodiment 3, eyeglass analyser, combine with eyeglass transmittance meter with lensmeter, form the eyeglass analyser, shown in Figure 5, various transmittances except energy detection optical mirror, can also detect every diopter parameter of eyeglass---diopter of correction (myopia, presbyopic parameter) and post mirror degree (astigmatic parameter) etc., finish comprehensive detection to the various performances of optics eye plate.

Computing machine 7, display screen 11, function indication frame 12, function button 13, support 16 are that lensmeter and transmittance meter are shared in the analyser.

Because eyeglass analyser compact conformation size is little, make between Amici prism and CCD apart from shorter, for the beam split light belt that makes CCD photoelectrical coupler 4 has enough height, guarantee the transmittance precision of detection, will use reflective mirror I and reflective mirror II (19 and 20 spread branch light belt height among Fig. 6).

Claims (9)

1, optical mirror slip transmittance measurement mechanism, it comprises a standard sources (1), a signal amplifier (5), AD sampling thief (6), computing machine (7) and display (8).It is characterized in that establishing narrow slit grating (2) at the light output end of standard sources (1), establish Amici prism (3) at the light output end of narrow slit grating (2), establish photoelectrical coupler CCD (4) at the light output end of Amici prism, signal amplifier (5) input end links to each other with the electrical signal of photoelectrical coupler CCD (4).

2, optical mirror slip transmittance measurement mechanism as claimed in claim 1 is characterized in that standard sources (1) sends all band spectrum that comprises the 280nm-780nm wavelength coverage.Amici prism (3) is for comprising 280nm-780nm all band Amici prism.

3, optical mirror slip transmittance measurement mechanism as claimed in claim 1 is characterized in that photoelectrical coupler (4) is the line array CCD photoelectrical coupler, contains 2000-5000 pixel, and the distance between each pixel is about 10 μ m.

4, optical mirror slip transmittance measurement mechanism as claimed in claim 1, it is characterized in that optical mirror slip transmittance meter by 280-780nm light source (1), narrow slit grating (2), Amici prism (3), 2000 with last pixel CCD photoelectrical coupler, be equipped with 8 figure place single-chip microcomputers and charactron show form.

5, optical mirror slip transmittance measurement mechanism as claimed in claim 1, it is characterized in that optical mirror slip transmittance meter by 280-780nm standard sources (1), narrow slit grating (2) and Amici prism (3), line array CCD photoelectrical coupler, join TM single-chip microcomputer and display screen and form.

6 optical mirror slip transmittance measurement mechanisms as claimed in claim 5 is characterized in that vertical optical mirror slip transmittance meter comprises that also support (16), eyeglass insert mouthful (15), eyeglass inserts a mouthful switch (14), function button (13), function display box (12) and display screen (11).

7, optical mirror slip transmittance measurement mechanism as claimed in claim 5 is characterized in that horizontal optical mirror slip transmittance meter comprises that also support (16), eyeglass insert mouthful (15), eyeglass inserts a mouthful switch (14), function button (13), function display box (12) and display screen (11).

8, optical mirror slip transmittance measurement mechanism as claimed in claim 1, it is characterized in that the eyeglass analyser by eyeglass transmittance meter and lensmeter in conjunction with forming, wherein display screen (11), function indication frame (12), function button (13) and support (16) are that lensmeter and transmittance meter are shared.

9, as claim 1 or 8 described optical mirror slip transmittance measurement mechanisms, it is characterized in that between Amici prism (3) and CCD photoelectrical coupler (4), establishing reflective mirror (19), (20).

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