Method and device for calibrating optically biaxial return and gas bath type linear displacement laser interferometer
A laser interferometer and laser interferometry technology, applied in the direction of optical devices, measuring devices, instruments, etc., can solve the problem of large Abbe errors, inconsistencies in the influence of the air refractive index optical path, and the inability to determine whether the interference mirror group and the measuring mirror belong to the standard laser The interferometer components still belong to the problem of being calibrated, so as to achieve the effect of small Abbe error
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[0029] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0030] A dual optical axis return and air bath linear displacement laser interferometer calibration device, including a standard laser interferometer laser 1 and two receivers 6 and 7 arranged at positions that can receive standard laser interferometer interference signals, the wires will The two receivers 6, 7 are respectively connected to the standard laser interferometer signal processing system 8; on the output optical path of the standard laser interferometer laser 1, there is an intermediate through hole 12 which allows the calibrated laser interferometer measuring beam 11 to pass through the double Axis hollow standard laser interference mirror group 2; a guide rail 18 is arranged on one side of the biaxial hollow standard laser interference mirror group 2, and the moving table 17 is fitted on the guiding rail 18, and a flat ...
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