Non-contact type high-precision three-dimensional measurement method and measurement device for complex optical surface shapes
A non-contact, three-dimensional measurement technology, used in measuring devices, optical devices, instruments, etc., can solve the problems of low precision, high measurement cost, three-dimensional measurement of optical components, and achieve low-cost, easy-to-operate Effect
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specific Embodiment approach 1
[0018] Specific Embodiments 1. A non-contact complex optical surface shape high-precision three-dimensional measurement method, which is implemented by the following steps:
[0019] 1. Use the autocollimation theodolite to aim at the spectral confocal sensor 3, the miniature three-beam interferometer 4, and the standard flat mirror 5, respectively, and adjust the attitude of the three so that they point in the same direction;
[0020] 2. Install the optical element 6 to be tested on the test platform, use a level to assist in adjusting the attitude of the sample, and eliminate errors such as tilt; according to the measurement requirements and the size of the optical element to be tested, determine the scanning parameters such as the number of scanning measurement points N and the spacing d; Set the three-dimensional translation stage 2 to move to the scanning start point (x 0 ,y 0 ), moving in the front-back direction z makes the spectral confocal sensor 3 focus on this point...
specific Embodiment approach 2
[0025] Specific embodiment two, combine figure 1 Describe this embodiment, this embodiment is the measurement device of the non-contact complex optical surface shape high-precision three-dimensional measurement method described in the first embodiment, the device includes a measurement platform 1, a spectral confocal sensor 3, a three-dimensional translation stage 2, Miniature three-beam interferometer 4 and standard plane reflector 5; Described spectral confocal sensor 3 and miniature three-beam interferometer 4 are fixed on three-dimensional translation stage 2; Described three-dimensional translation stage 2 and standard plane reflector 5 are fixed on measurement on platform 2.
[0026] The measuring platform 1 described in this embodiment adopts a stainless steel air-floating platform, and the surface of the standard plane mirror 5 is coated with an aluminum film.
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