Optical lens residual polarization testing device

Abstract

The invention discloses an optical lens residual polarization testing device. The optical lens residual polarization testing device is characterized in that an integrating sphere with three ends beingopen and halogen tungsten lamps is adopted to serve as a light source, a focusing lens is adopted to perform focusing on a light beam, and a polarizing optical system formed by an achromatic filter,a polarizer and a 1 / 4 wave plate is adopted to provide a measurement light beam with a specific polarization state and a specific wavelength; a large-aperture off-axis parabolic reflecting mirror is adopted to perform collimation on the measurement light beam, and then the collimated measurement light beam passes through a tested optical lens; and a photoelectric detector is utilized to measure apolarization optical signal amplified by an amplifier, so that optical lens residual polarization degree measurement with the wavelength range being 0.45 micron-1.1 microns and the polarization degreemeasurement range being 0.1-0.9 is achieved.

Description

technical field [0001] The invention relates to the field of optical metrology and measurement, and mainly relates to the residual polarization test of an optical lens, in particular to a residual polarization test of an optical lens in a visible light band and a near-infrared band. Background technique [0002] Polarization is a basic and important physical quantity of light. The polarization state of light waves is a rich source of information. The polarization states of radiated light, reflected light, transmitted light, and scattered light carry a lot of valuable information. The polarization detection system uses the polarization of light This technology has great advantages that traditional optical detection and imaging detection do not have. It is a new detection technology that has emerged in recent years. [0003] In the field of polarized optical detection and measurement, it is generally considered that the optical system used in the system is non-polarized, that ...

AI Technical Summary

Problems solved by technology

[0007] The caliber of the optical lens is large, and a large-caliber collimating optical system is necessary to achieve full-aperture measurement; the focal length of the optical lens is short and sensitive to angles, while the existing polarization measuring instrument only measures the polarization characteristics of the light source, and the measurement caliber is small. About 5mm; the acceptance angle is limited, it can only measure the polarization degree of the light source within ±2°, and cannot realize the residual polarization measurement of the optical lens

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