Adjustable high-stable F-P integrated endoscope device

Abstract

The invention relates to an adjustable high-stable F-P integrated endoscope device which comprises a signal source, a high-voltage amplifier, a light source, an optical separator, a reflective plane mirror set, a matching lens and an F-P integrated endoscope set. The high-voltage amplifier and the light source are connected with the signal source. The optical separator and the reflective plane mirror set are sequentially arranged on an emergent light path of the light source. The matching lens and the F-P integrated endoscope set are sequentially arranged on a reflected light path of the reflective plane mirror set. The frequency variations of spectral lines can be greatly reduced, according to the F-P integrated endoscope set, lens mounts for fixing a first plano-concave lens and a second plano-concave lens are fixed in a V-shaped groove in the top of a base, therefore, the free degree of the lens mounts is greatly reduced, the direction of horizontal moving is also limited, and stability and sensitivity and precision of detection of the lens set are greatly improved. The purpose of convenient adjusting is achieved, besides, the requirement for the stability is met, operation is convenient, the structure is simple, and the simple tool is provided for a related physical experiment.

Description

technical field [0001] The invention belongs to the technical field of optical devices, and in particular relates to an adjustable and highly stable F-P integral cavity device. Background technique [0002] Fabry-Perot cavity (F-P cavity) is a physical device commonly used in spectroscopy experiments. On the one hand, it is used as an etalon for spectral line frequency calibration; on the other hand, it is used as one of the main tools for generating frequency discrimination standard signals. One is used for laser frequency locking, especially for semiconductor lasers often used in atomic physics experiments. In addition to the above applications, in particular, it can also be used for intracavity absorption experiments to optimize the absorption signal. [0003] The method is to place the sample cell (or absorbing substance) in the cavity, inject laser light into the cavity, and the light is reflected multiple times by two high-reflectivity mirrors in the cavity. The equiv...

AI Technical Summary

Problems solved by technology

However, there are still some problems in this integral F-P cavity: on the one hand, although its stability is better than that of the open F-P cavity, its adjustable degree is greatly limited, and the optical path closure of the light depends largely on the operator to paste the lens experience, to achieve the absolute parallelism of the two lenses, which is a great challenge for the operator

And because of the adhesive method, it is a one-time process. If there is an angle problem between the pasted lenses, the glue needs to be removed and the operation repeated, which makes the experimental operation complicated and time-consuming.

On the other hand, although the design of cavity integration ensures that the axial centers of the two plano-concave lenses are consistent, the result of such axial center consistency is only established before the lower end cover is rotated. When the cavity matching needs to be carried out in the experiment When the lower end cap is rotated, the center position of the plano-concave lens in the central area of ​​the lower end cap changes with the rotation thread, which destroys its consistency with the plano-concave lens of the upper end cap on the axial center. both adversely affect

In addition, for the physical experiment of the absorption detection of the sample cell, the open optical F-P cavity cannot provide a loading device with a stable mechanical structure and an absolutely consistent optical center, while the integral optical F-P cavity cannot conveniently place the sample cell in the cavity due to structural limitations. And once the overall F-P cavity has closed the optical path and the lens is fixed, the sample in the cavity cannot be taken out from the closed cavity, which will bring difficulties to further operations in the later stage, such as temperature control of the sample cell, position adjustment, etc.

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