Device and method for testing multi-wavelength refractive index of a lens

A testing device and technology of refractive index, applied in the field of multi-wavelength refractive index testing devices of lenses, can solve the problems of difficult detection, large measurement error, etc.

Pending Publication Date: 2021-08-06
宁波法里奥光学科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a lens multi-wavelength refractive index testing device and method to solve the problem that the existing refractive index detection device proposed in the above background technology is difficult to detect and cannot be applied to the refractive index of finished lenses of different thicknesses. Test, there is a problem of large measurement error

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  • Device and method for testing multi-wavelength refractive index of a lens
  • Device and method for testing multi-wavelength refractive index of a lens
  • Device and method for testing multi-wavelength refractive index of a lens

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specific Embodiment 1

[0031] Such as Figure 1-3 As shown, a lens multi-wavelength refractive index testing device includes a lens to be tested 1, and the lens multi-wavelength refractive index testing device includes a light source assembly, a signal detection module, a moving mirror 2 that moves back and forth at a uniform speed, and a diopter measurement module, wherein the The light source assembly includes a first light source assembly 3 for auxiliary diopter measurement, N groups of second light source assemblies 4 arranged from low to high wavelengths, a third light source assembly 5 for superluminescence, a first spectroscopic assembly 6, a second Spectroscopic assembly 7, the third spectroscopic assembly 8 and focusing lens 9 that each group of second light source assembly 4 is provided with; Described diopter measurement module comprises Hartmann aperture 10 and area array image sensor 11, and described Hartmann aperture 10 is provided with several light-transmitting points 10.1, and the ...

specific Embodiment 2

[0037] Such as Figure 4 As shown, the difference between this specific embodiment and specific embodiment 1 is that the second test light source 4.3 is a white light source, N=1, wherein the spectral range of the white light source covers 460nm-660nm, and the second light transmission hole 4.2 The diameter is 0.15-0.25mm, the light from the white light source becomes parallel light after passing through the second collimating lens 4.1, and the light transmittance of the third beam splitter 8.1 is greater than 90% for 750-1000nm, and greater than 90% for 450-660nm light , for the 450-660nm light reflectance is greater than 90%, between the first photodetection assembly 13 and the fifth beam splitter 16 and between the second photodetection assembly 12 and the fourth beam splitter 15 are respectively provided for transmitting the corresponding wavelength The optical filter 14, the optical filter 14 transmission spectral bandwidth 15nm-30nm, the peak transmittance is greater tha...

specific Embodiment 3

[0039] A lens multi-wavelength refractive index testing method, comprising the following steps:

[0040] (1) Before the lens to be tested is placed, the first test light source is turned on, and the spot array position of the transmitted light beam is monitored by the area array image sensor as a reference position for subsequent position adjustment of the lens to be tested;

[0041](2) Turn on the N second light source assemblies and the third light source assemblies, and at the same time, move the mirror forward and backward at a constant speed; N first photodetection assemblies respectively monitor the interference signals corresponding to the second light source assemblies, and record The distance X between the moving mirror and the first beam splitting component when interference signals occur 1 , X 2 , X 3 …X N , the interference signal corresponding to the third light source assembly is detected by the second photodetection assembly, and the distance X between the mo...

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Abstract

The invention relates to a device and method for testing the multi-wavelength refractive index of a lens, and the device comprises a tested lens, and the device comprises a light source assembly, a signal detection module, a moving reflector moving back and forth at a constant speed, and a diopter measurement module. According to the lens multi-wavelength refractive index testing device, related parameters for calculating the refractive index are obtained by detecting interference signals, a prism does not need to be manufactured, detection of related angles of the prism is not needed, operation is more convenient, the testing period is shortened, rapid testing can be achieved, and the lens multi-wavelength refractive index testing device is suitable for detection of finished lenses; moreover, by arranging the second light source assemblies with various wavelengths and the corresponding first photoelectric detection assemblies, and combining the third light source assembly with superradiation luminescence and the second photoelectric detection assembly, the device can adapt to tested lenses with various thicknesses, and even if the tested lenses are too thick or too thin, the accuracy of test parameters can be ensured, and test errors can be reduced.

Description

technical field [0001] The invention relates to the technical field of optical lens parameter detection, in particular to a lens multi-wavelength refractive index test device and method. Background technique [0002] The refractive index is the physical quantity of the optical properties of the reaction medium. In order to ensure that the optical system has a good imaging quality, it is necessary to accurately measure the refractive index of the optical material. At present, there are two main methods for detecting the refractive index of finished lenses on the market: one is to perform reverse calculation based on the focal power formula, that is, by measuring the radius of curvature, central thickness and lens focal power of the lens, according to the focal power formula Calculating the refractive index of its wavelength is complicated and difficult, and it is difficult to guarantee the measurement accuracy, and it is not suitable for the measurement of aspheric lenses; an...

Claims

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Application Information

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IPC IPC(8): G01M11/02G01N21/41G01N21/45
CPCG01M11/02G01N21/41G01N21/45
Inventor 刘义兵孙昭刘力威何骐任杨燕飞
Owner 宁波法里奥光学科技发展有限公司
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