A portable optical measuring instrument

Abstract

The invention discloses a portable optical measuring instrument. The portable optical measuring instrument has high space-time resolution and achieves nondestructive non-contact measurement. The wavelength-division multiplexing technology is adopted, a laser light source serves as both an excitation light source and a detection light source, and the detection light source is supplied to a Fizeau interferomenter of an all-optical-fiber structure to achieve ultrasonic vibration detection. A detection system which generally needs two laser devices to operate can be simplified into a portable structure which needs only one laser device. Constituent elements of the portable optical measuring instrument are small in size, optical fibers are used as connecting parts among the elements, the limitation of a traditional optical structure is broken through, and thus the portable optical measuring instrument can be packaged to form an integrated detection system with only an excitation laser probe and a detection laser probe retaining outside. The system has a compact structure with the weight greatly reduced, can meet the requirements for portability and measuring precision and can be flexibly used in some environments where operation is inconvenient.

Description

technical field [0001] The invention relates to the field of optical detection devices, in particular to a portable optical measuring instrument. Background technique [0002] There are already many laser ultrasonic detection methods. At present, the conventional ultrasonic detection devices include piezoelectric transducers, piezoelectric films, electrostatic sensors, electromagnetic acoustic transducers, etc. These methods have high detection sensitivity, but must be compared with the test Sample contact, or require very close to the sample surface, and the use of coupling agent, so that the characteristics of laser ultrasonic non-destructive telemetry and adaptability to harsh environments cannot be brought into play, and these can be reflected by optical detection methods. Therefore, the application of optical detection methods will be the future development direction. There are also many classifications of optical detection methods, mainly divided into interferometric ...

AI Technical Summary

Problems solved by technology

However, most of the existing optical detection equipment is relatively complicated, most of which are expensive optical lenses and other instruments, which are large in size, heavy in weight, and are easily affected by environmental vibrations, requiring an optical platform as an auxiliary, so It can only be operated in the laboratory, and cannot be well applied to actual operation, let alone realize measurement anytime and anywhere

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