Light path calibration tool and method

Abstract

The invention provides a light path calibration tool, which comprises a fixing rod and a calibration rod which are coaxially arranged, the diameter of the calibration rod is approximately the same as that of a light spot to be calibrated, and the fixing rod can be axially inserted and matched with a fixing hole in the surface of an optical platform, so that the calibration rod is positioned on a light path to be calibrated and is placed above the optical platform. The invention further provides an optical path calibration method, and the optical path calibration tool is sequentially used from front to back to adjust the optical devices so as to calibrate the optical path. The calibration tool has the advantages that the fixing rod can be directly inserted into the fixing hole, screw connection is not needed, the calibration tool can be quickly inserted and pulled out in the use process, and use is convenient; the calibration result is judged by judging whether the light spot is completely covered by the calibration rod, and the light path calibration precision is high; and the calibration rod can be directly irradiated by a light spot to check whether the size is proper or not before an experiment, so that the calibration precision is prevented from being influenced by processing errors. The device is suitable for quantum information related optical experiments such as quantum communication and quantum measurement.

Description

technical field [0001] The invention relates to the technical field of optical path debugging, in particular to an optical path calibration tool and method. Background technique [0002] In optical experiments and related applications using point light sources, it is usually necessary for light to be vertically incident on certain optical lenses, especially in quantum optics experiments. The accuracy of optical path adjustment often directly affects the experimental results, so keep the alignment of the optical path , that is, there is no offset in the horizontal and vertical directions, which will be particularly important. The existing method for adjusting the alignment of the optical path is generally the multi-aperture method. For example, the invention patent application with the publication number CN104242029A discloses a method for quickly installing and adjusting the laser folded resonator, which discloses the method of using the aperture to calibrate the light; A d...

AI Technical Summary

Problems solved by technology

[0004] (1) Every time the light turns, the aperture needs to be screwed into the fixed hole that runs through the surface of the optical table to calibrate the optical path. The calibration process is relatively complicated and inconvenient to use;

[0005] (2) Due to the need to use multiple apertures for calibration at the same time, the processing error of different apertures is different, which will affect the accuracy of light calibration;

[0006] (3) The aperture bracket has a threaded structure, and the aperture bracket needs to be manually rotated and screwed into the fixing hole of the optical table. Different torques will lead to different positions of screwing into the fixing hole, resulting in inaccurate light calibration

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