A polarization-isolated dual-axis digital photoelectric autocollimator

Abstract

The invention relates to the field of optical measurement, in particular to a collimator and particularly provides a polarization isolation double-axis digital photoelectric autocollimator. The polarization isolation double-axis digital photoelectric autocollimator comprises a first light source, a second light source, a first reticle, a second reticle, a first light source convergence lens, a second light source convergence lens, a first beam splitting prism, a second beam splitting prism, a quarter wave plate, a primary telescope mirror, a secondary telescope mirror and a PSD. According to the polarization isolation double-axis digital photoelectric autocollimator, a polaroid is adopted, so that losses of optical energy are reduced; the PSD is adopted, so that the resolution ratio is high; the double-axis line-shaped reticles are adopted, detected cross-shaped projection optical signals are generated through overlapping of optical signals of two independent double-axis light source systems, and equivalently two times of detection is achieved on one autocollimator, so the polarization isolation double-axis digital photoelectric autocollimator improves the resolving capability and the reaction capacity of a system, and is simple in structure, higher in measurement accuracy and capable of being widely applied to collimation measurement in the fields such as daily life, industrial production, aerospace, ships and military industry.

Description

technical field [0001] The invention relates to the field of photoelectric detection, in particular to the field of autocollimators. Background technique [0002] Autocollimator is a precision measuring instrument that uses the principle of optical self-collimation to realize small-angle measurement. Because of its convenient use and high detection accuracy, it is widely used in aerospace, shipbuilding, military and other high-precision industries, such as quality assurance in the machining industry (straightness, flatness, verticality, parallelism) etc.), angle test standards in the metrology and verification industry, prism angle positioning and monitoring, optical component testing and installation accuracy control, etc., have a wide range of applications. Autocollimator has gone through three stages of development: visual type, photoelectric zero type and digital display type. [0003] Improving resolution and display stability is the development direction of general d...

AI Technical Summary

Problems solved by technology

[0006]At present, photoelectric autocollimators produced at home and abroad mainly rely on human eyes to read and are used for static testing. The response frequency is not high and cannot meet the needs of high-speed measurement.

[0007] In addition, the measurement accuracy of the single-axis autocollimator is poor, and it cannot realize the measurement of two-dimensional angles well.

[0008] In addition, when the current autocollimator generally passes through the semi-transparent and semi-reflective action of the dichroic prism many times, the light energy that can finally be projected to the detection device will lose a lot, up to 80%. Such a large loss of light energy will affect the detection device. Higher requirements for photosensitivity

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