Transmitting and receiving optical axis parallelism measuring device and measuring method

Abstract

A transmitting and receiving optical axis parallelism measuring device comprises an objective table, an off-axis parabolic mirror, a two-dimensional adjusting table, a pentagonal prism, an auto-collimation telescope, a CCD image acquisition system, a computer, an optical fiber input coupler and an optical fiber. The measuring method comprises the following steps: fixing the measured device on theobjective table, and shielding a receiving lens cone, wherein the laser pulse forms an obvious light spot on a laser test card; collecting a laser spot image, and obtaining a spot energy center position coordinate; taking down the laser test card, aligning the optical fiber input coupler with a laser emission lens cone, and installing the optical fiber; opening the receiving lens cone, adjusting the tested instrument, emitting laser pulses, and enabling an optical fiber terminal to be in the receiving view field of the tested instrument; enabling the computer to control the two-dimensional adjusting table until the number of turns is 50% valid and 50% invalid; obtaining circle center coordinates, and calculating parallelism deviation [alpha]. According to the invention, the high-precisiontwo-dimensional adjusting table is specifically selected, and information processing is carried out through computer control, so that the operation mode is simplified, and the measurement precision ishigh.

Description

technical field [0001] The invention belongs to the field of optical measurement, and mainly relates to a measuring device and a measuring method for the parallelism of emitting and receiving optical axes. Background technique [0002] In laser ranging, laser radar and other related equipment, the parallelism of the transmitting and receiving optical axes is an important technical indicator. The photoelectric tracking measurement equipment is usually equipped with one or several optical systems of visible, infrared and laser distance measurement at the same time, so that the photoelectric measurement equipment has multi-spectral detection capabilities and powerful functions. In order to complete the task of detecting and measuring the target, the key factor is to make all kinds of imaging optical systems strictly parallel to the optical axis of the laser ranging system and keep the same pointing to ensure the consistency of the measurement results between the various systems...

AI Technical Summary

Problems solved by technology

[0003] Commonly used optical axis parallelism measurement methods include large-aperture collimator method, projection target method, laser optical axis method and pentaprism method. Among these methods, the pentaprism method is widely used because of its simple equipment and high detection accuracy. In the error analysis of the test results, the error caused by the pentaprism itself is often ignored

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