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Spectrum confocal type measurement method and device for thickness of center of lens

A lens center and 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, cost control, and accurate centering

Inactive Publication Date: 2014-09-24
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.

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  • Spectrum confocal type measurement method and device for thickness of center of lens
  • Spectrum confocal type measurement method and device for thickness of center of lens
  • Spectrum confocal type measurement method and device for thickness of center of lens

Examples

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 spectrum confocal type measurement method and device for the thickness of the center of a lens. An existing method and device have large errors and consume much time when carrying out measurement. The measurement method includes the steps that an area-array cameras and a television image are utilized for assisting in centering, the thickness of the center of the optical lens is measured through the spectrum confocal means, accuracy of the measured thickness is ensured, and accuracy of test results is largely improved. The measurement device is additionally provided with a monitor optical way for the process of measuring the thickness of the lens through the spectrum confocal means, the ratio of overlapping of a centering optical way and a measurement optical way is high, unnecessary hardware waste is reduced, and cost of the measurement device is effectively controlled.

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-...

Claims

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Application Information

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Patent Type & Authority Applications(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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