Measurement device and method for transmission wavefronts of self-focusing lens

Abstract

The invention belongs to the field of optics, and relates to a measurement device and method for transmission wavefronts of a self-focusing lens. The measurement device for the transmission wavefronts of the self-focusing lens comprises a light source, a convergent mirror, a target plate, a collimating mirror, an aperture, a first microscope objective, a second microscope objective, a positioning reference structure, a Shack-Hartmann wavefront sensor and a control computer; the convergent mirror, the target plate, the collimating mirror, the aperture, the first microscope objective, the second microscope objective, the positioning reference structure and the Shack-Hartmann wavefront sensor are successively arranged on an emergent light path of the light source; the Shack-Hartmann wavefront sensor is connected with the control computer; the self-focusing lens to be detected is placed between the first microscope objective and the second microscope objective. The invention provides the measurement device and method for the transmission wavefronts of the self-focusing lens based on the Shack-Hartmann wavefront sensor, which is free from external environmental influences and capable of guaranteeing test precision.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a self-focusing lens transmission wavefront measurement device and method, in particular to a self-focusing lens transmission wavefront measurement device and method based on a Shack-Hartmann wavefront sensor. Background technique [0002] Self-focusing lens, also known as gradient variable refractive index lens, refers to a cylindrical optical lens whose refractive index distribution is gradually changed along the radial direction. It can cause continuous refraction of the light transmitted along the axial direction, so as to realize the smooth and continuous convergence of the outgoing light to one point. Due to the end face collimation, coupling and imaging characteristics of the gradient index lens, coupled with its small cylindrical shape, it is not only successfully used in the imaging field (copiers, fax machines, endoscopes and optical disc lenses, etc.), but also in optical fibers I...

AI Technical Summary

Problems solved by technology

Since the working band of the self-focusing lens is visible light, the numerical aperture is large, the overall size is small, and the two ends are parallel planes, the use of interferometry to measure the transmitted wavefront of the self-focusing lens has the following disadvantages: 1) The laser interferometer works at a single wavelength and cannot achieve white light. Transmission wavefront measurement; 2) The static phase-shifting laser interferometer driven by piezoelectric ceramics is easily affected by air flow disturbance and vibration, and the dynamic laser interferometer only works in a specific band, and the test efficiency and economy are poor; 3) Due to the The reflections on both ends of the focusing lens make the interference fringes superimposed on each other, which seriously affects the measurement results of the transmitted wavefront

Therefore, the use of laser interferometers cannot meet the needs of self-focusing lens transmission wavefront testing

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