Digital display type Michelson interferometer automatic measurement system and method

Abstract

The invention discloses a digital display type Michelson interferometer automatic measurement system and method. The system comprises a fine tuning handwheel driving apparatus, an interference ring measurement apparatus, a control digital display host, a Michelson interferometer and an interference fringe observation screen, wherein the fine tuning handwheel driving apparatus clamps a fine tuning handwheel of the Michelson interferometer to drive the fine tuning handwheel to rotate synchroneously to enable a moving mirror of the Michelson interferometer to go forward or backward; the interference ring measurement apparatus is arranged on the interference fringe observation screen and is connected with the fine tuning handwheel driving apparatus; and the control digital display host is connected with the fine tuning handwheel driving apparatus. The system provided by the invention is exquisite and reasonable in structure and convenient to use, satisfies the requirement of a Michelson interferometer for stable operation during work, ensures measurement precision of the Michelson interferometer and also has the advantages of wider application, higher cost performance and the like compared to similar products.

Description

technical field [0001] The invention relates to an interferometer automatic measurement system and method, in particular to a digital display Michelson interferometer automatic measurement system and method, belonging to the fields of precision optical instruments, mechanical automation, electronics and sensing. Background technique [0002] The traditional measurement method of the Michelson interferometer is to rotate the fine-tuning handwheel to drive the moving mirror displacement of the instrument to change the optical path difference of the interfering light, so that the circular fringes of equi-inclination interference are constantly "spitting out" from the center or "swallowing" toward the center. , by recording the number of throughput changes of the interfering circular fringes and the displacement of the corresponding moving mirror, and through complex step-by-step data processing, the measurement results can be obtained. Manual operation generally needs to count ...

AI Technical Summary

Problems solved by technology

[0004] The existing automation system still has 8 major disadvantages for the upgrade of Michelson interferometer, a precision optical instrument: 1) it is only used for fringe counting or moving mirror displacement statistics; 2) the existing automation system uses geared motors and manual The rigid connection of the wheel is easy to introduce motor vibration to affect the imaging of the interference ring, resulting in inaccurate counting of the throughput of the interference ring and affecting the measurement accuracy; 3) The photoelectric sensor circuit for fringe counting is sensitive to changes in the intensity of the light source, and has high requirements for the quality of the light source, and the scope of application is small ;4) Can only be measured in a dark environment

5) The entire system can only be installed and work normally with the help of non-Michelson interferometer structural auxiliary components such as shock absorbing platforms and lifting frames. The entire set of equipment has many components and is too large. The installation process is cumbersome and requires high technical requirements. It is easy to introduce Installation deviation leads to errors in measurement results; 6) The current Michelson interferometer counting system cannot record and store historical measurement data; 7) The system cannot automatically calculate the measurement results based on the number of interfering ring throughputs, and requires the use of computers or manual calculations ; 8) The use of the current system is mainly limited to experimental teaching in colleges and universities, wasting the greater value of Michelson interferometer in scientific research, production and measurement

[0005] Therefore, the current Michelson interferometer automatic measurement system can only be used as a measurement aid, and is mainly used in teaching and student experiment scenarios, and cannot be widely used in production and scientific research.

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