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A kind of spectral confocal lens center thickness measurement method and device

A lens center, spectral confocal technology, applied in the field of optical detection, can solve problems such as large errors, and achieve the effects of eliminating test errors, controlling costs, and accurate centering

Inactive Publication Date: 2016-08-24
XIAN TECH UNIV
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Problems solved by technology

[0005] The object of the present invention is to provide a spectral confocal lens center thickness measurement method and device in order to solve the large errors existing in the existing methods and devices.

Method used

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  • A kind of spectral confocal lens center thickness measurement method and device
  • A kind of spectral confocal lens center thickness measurement method and device
  • A kind of spectral confocal lens center thickness measurement method and device

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Experimental program
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Embodiment

[0032]Measurement example of biconvex lens center thickness

[0033] Such as figure 1 As shown, a spectral confocal lens center thickness measurement method, the measurement steps are:

[0034] (1) According to the caliber of the measured lens, select and install the matching adjustable lens loading platform; place the tested lens 13 on the adjustable lens loading platform;

[0035] (2) Turn on the light source. The light emitted by the broadband light source 1 passes through the first achromatic beam expander and collimator optical lens 2 to form a broadband parallel beam. The light of different wavelengths has no phase difference, and the parallel light enters the dispersion after passing through the first dichroic prism 3 Lens group 4, light of different wavelengths produces spectral dispersion, forms a series of focal points in space and focuses on different quasi-monochromatic lights on the front and rear surfaces of the measured double-convex lens 13 with a certain amou...

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Abstract

The invention relates to a method and a device for measuring the center thickness of a spectral confocal lens. The existing methods and devices have large errors and time-consuming measurements. The measuring method is to use an area array camera and a TV image to assist in centering, and then use a spectral confocal method to measure the center thickness of the optical lens, which ensures the correctness of the measuring object and greatly improves the accuracy of the test results. The device of the invention expands a monitoring optical path in the spectral confocal measurement lens thickness, the centering optical path and the measuring optical path have high coincidence degree, reduce unnecessary hardware waste, and effectively control the cost of the device.

Description

technical field [0001] The invention belongs to the technical field of optical detection, and in particular relates to a method and device for measuring the central thickness of a spectral confocal lens. Background technique [0002] Optical lenses are made of glass or polymeric materials, and high-quality optical lenses have tight tolerances. In the field of optics, the central thickness is a basic parameter of the lens, among which the central thickness of the lens will directly affect the focal length, curvature radius, theoretical aberration and other parameters of the lens, and have a great impact on the imaging quality of the optical system, so it must be processed effective measurement in the process. [0003] For the measurement of the center thickness of the optical lens, in addition to the destructive measurement method that has certain damage to the surface of the optical element, experts and scholars in the field of optical engineering have proposed several non-...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/06
Inventor 王春慧田爱玲王红军朱学亮刘丙才
Owner XIAN TECH UNIV
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