Transmission rotation symmetry aspheric surface detection system and method

Abstract

The utility model provides a transmission rotational symmetry aspheric surface detecting system, and the system comprises a laser, a collimating lens, a focusing lens, a lens tray to be detected, a beam expander and a wavefront sensor, a first driver for driving the focus lens to move in the optical axis direction, a second driver for driving the lens tray to be detected to translate along the XYdirection vertical to an optical axis, a third driver for driving the beam expander to move along the optical axis direction, and a rotary shifter for rotating the lens to be detected in the lens limiting hole of the lens tray to be detected, wherein the laser, the collimating lens, the focusing lens, the lens tray to be measured, the beam expander and the wavefront sensor are arranged on a lightpath in sequence. In the detection method using the system, the first-order rotation characteristic of the wavefront third-order Coma aberration is applied to error analysis, the node position of thethird-order Coma aberration and the distribution of the corresponding sagittal diameter are determined, and the distribution graph and the parameters of the sagittal diameter are compared with standard elements, so that the high-precision detection of errors such as lens processing eccentricity and the like is realized rapidly.

Description

Technical field [0001] The invention relates to optical element detection, in particular to a transmission rotationally symmetric aspheric surface detection system and method. Background technique [0002] Aspheric optical elements have extremely prominent advantages in improving aberration correction ability, improving imaging quality, simplifying the structure of optical systems, etc., and are increasingly used in optical systems. Aspherical plastic optical lenses have many advantages, such as light weight, saving assembly space, impact resistance, and easy generation of various geometric shapes. They are widely used in many fields such as industry, medical treatment, and consumer electronics. However, plastic lenses have undergone heating, injection, pressure holding, cooling and other processes during the injection molding process. These processes cause aspheric lenses to easily produce stress birefringence, uneven refractive index, and surface shapes in the geometrical shape...

AI Technical Summary

Problems solved by technology

The positioning accuracy of the measuring head and the displacement accuracy of the penetrating test are relatively high, and the higher the accuracy required for the test, the greater the asphericity and the longer the test time

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