Study On Key Technology Of Multi-axis Parallelism Test In Large Temperature Difference Environment

With the continuous progress of optoelectronic technology,military weapons and equipment develope gradually,which combines the sensors of laser,visible and infraed light.This kind of equipment integrates a variety of photoelectric sensors in one and the spectral range of the equipment covers all wavelengths from visible to infrared light.The parallelism between the optical axes becomes a critical issue in determining system performance.Therefore,it is very important to detect the parallelism between the optical axes of multi-optical axis optical devices on weapon platforms.Based on the temperature changes and a wide range of detection and other issues,a wide-spectrum and multi-axis parallelism test system is designed.Aiming at the design result of optical system,a design scheme of optical structure is proposed.According to the demand of temperature stability,the athermal structure of the system is analyzed.In this paper,the main functional components of the system are selected,and the accuracy analysis and the test of the designed system are carried out.The system is adapt to the temperature change from-40 to +55? ?.The spectrum detection range of the system is 0.4?m~12?m.The basic aperture is 270 mm and the expanding aperture is 1200 mm.The visible,infrared and laser optical aiming requirements of parallelism is less than index 12 ".The test accuracy of aiming axis and mechanical axis is less than 40".