Calibration device for discrete optical axis multispectral alignment instrument

Abstract

The invention relates to a device for calibrating a multi-spectral axis calibrator with a discrete optical axis and belongs to the field of optical measurement. A semi-transmitting and semi-reflecting mirror, a laser and a charge-coupled device (CCD) camera are integrated in a collimator tube; an optical axis of the CCD camera is vertical to that of the collimator tube, and an object point of theCCD camera is positioned at an equivalent focal point of the collimator tube; and an electric cross which is generated by the CCD camera is displayed by a display. During self-calibration, an emergent light beam of the collimator tube is vertically irradiated on a plane reflecting mirror and reflected and then forms a self-calibration image on the display; and during the calibration measurement of the axis calibrator, after an infrared channel or a visible light channel of the measured axis calibrator is aligned with the collimator tube, the laser emits laser to a laser channel of the measured axis calibrator, and the parallel misalignment of the laser and the infrared channel or the parallel misalignment of the laser and the visible light channel is obtained by a data processing system of the laser channel. The device is applicable to calibration of the multi-spectral axis calibrator with the discrete optical axis and has the characteristics of simple calibration method, objective calibration result, reliability and the like.

Description

technical field [0001] The invention belongs to the field of optical metrology, and relates to a device capable of calibrating the optical axis of a multispectral alignment instrument, in particular to a calibration device capable of calibrating a discrete optical axis multispectral alignment instrument. Background technique [0002] The multi-spectral alignment instrument can calibrate the parallelism between the laser axis and the infrared TV axis, and the laser axis and the visible light TV axis in the photoelectric system, so it is widely used in the engineering field. The multi-spectral alignment instrument with discrete optical axes generally consists of a laser optical channel, an infrared optical channel, a visible optical channel, and a data processing system whose optical axes are parallel to each other, and the three optical channels can be arranged in any way. The calibration method of multi-spectral alignment instrument with discrete optical axes has not been re...

AI Technical Summary

Problems solved by technology

However, the premise of this calibration method is that the collimator can only emit light from one optical axis, so it can only calibrate the collimator with a common objective lens, but not the multispectral collimator with separate optical axes; in addition, using this The axis calibration instrument based on the similar calibration principle does not have the self-calibration function

Images