一种弹光调制器精确定标微系统设计

弹光调制器利用各向同性晶体受迫振动后产生的双折射效应,对入射的偏振光进行相位调制,在偏振调制及测量方面具有重要应用.弹光调制器的相位延迟是其关键指标参数,实际应用时需对驱动电压与相位延迟进行标定.但传统的弹光调制器定标系统中的元件体积较大,且在使用前完成标定,误差大.为了使弹光调制系统能够实现实时定标,达到精确定标的目...

A precise calibration microsystem for photoelastic modulator

Photoelastic modulator uses the birefringence effect produced by the forced vibration of isotropic crystal to modulate the phase of incident polarized light,which has important applications in polarization modulation and measurement.The phase delay of photoelastic modulator is its key index parameter,and the driving voltage and phase delay should be calibrated in practical application.However,the components in the traditional calibration system of photoelastic modulator are bulky,and the calibration is completed before use,resulting in large errors.In order to make real-time calibration of the photoelastic modulation system available,achieve the purpose of precise calibration,and improve the convenience of use,a micro-system for precise calibration of photoelastic modulator is proposed.By reducing the size of the calibration system components,and making them integrated at the edge of the transparent aperture of the photoelastic modulator to realize real-time calibration of phase delay.It is verified by experiments that the calibration microsystem of photoelastic modulator can accurately calibrate the phase delay of photoelastic modulator in real time without affecting the central light path.The calibration results show that the phase delay deviation is less than 1%after one hour’s testing.