Testing method for uniformity of spherical lens material

A spherical lens and detection method technology, applied in the direction of analyzing materials, material analysis by optical means, measuring devices, etc., can solve problems such as the inability to evaluate the uniformity of lens materials

Active Publication Date: 2018-06-26
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

In the prior art, the detection methods for the uniformity of optical glass materials include the transmission method based on the phase-shifting interferometer and the sticking plate method, but these two methods can only detect the material uniformity of flat glass, and the flat glass is processed into a spherical surface. Lens final material homogeneity cannot be assessed after lensing

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  • Testing method for uniformity of spherical lens material
  • Testing method for uniformity of spherical lens material
  • Testing method for uniformity of spherical lens material

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0022] figure 1 It is a schematic diagram of the uniformity detection method of spherical lens materials, and the detection of uniformity of spherical lens materials by combining phase-shifting interferometry technology, refractive index matching liquid and mounting plate includes the following steps:

[0023] Step 1: Build a spherical lens material uniformity testing device, including an interferometer 1, a transmission plane etalon (TF) 2, a refractive index matching liquid 3, a mounting plate 4, an inspected lens 5, and a reflection plane etalon (RF) 6 , all components are placed coaxially. Immerse the tested lens 5 in the refractive index matching liquid 3, and use two sticking plates 4 to form a container for the refractive index matching liquid 3, wherein the refractive index of the refractive index matching liquid 3 at the working wave...

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Abstract

A method for detecting the uniformity of spherical lens materials belongs to the technical field of optical interferometry. The method combines phase-shifting interferometry technology, a refractive index matching liquid and a sticking plate to realize the detection of the uniformity of spherical lens materials. By matching the refractive index of the refractive index matching liquid with the lens to be tested, the lens to be tested can be detected by using the plane wavefront of the interferometer. At the same time, the influence of the uniformity of the refractive index matching liquid on the detection results is eliminated by stirring the refractive index matching liquid, and then repeatedly measuring the interference detection results in a full cavity state. Finally, the material uniformity of the inspected lens can be obtained by subtracting the results of full cavity and cavity interference. The beneficial effect of this method is that not only the material uniformity of the flat glass but also the material uniformity of the spherical lens can be measured.

Description

technical field [0001] The invention belongs to the technical field of optical interference measurement and relates to a method for detecting uniformity of optical spherical lens materials. Background technique [0002] High-precision optical imaging lenses are usually composed of multiple optical lenses. In order to achieve ideal imaging quality, the transmitted wavefront of the optical lens is required to reach the diffraction limit, and the material uniformity of the optical glass is one of the main sources of the transmission wavefront error of the optical lens. . In addition, when using the zero position compensation mirror method to detect the aspheric mirror surface shape, in order to obtain high-precision aspheric surface shape detection results, it is necessary to correct various error sources of the zero position compensation mirror. The influence of spherical wavefronts. In the above application fields, the uniformity detection technology of optical glass materi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/17
CPCG01N21/17
Inventor 苗亮张文龙刘钰马冬梅金春水
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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