DYNAMIC HOLOGRAPHIC INTERFEROMETRIC-DHI SENSOR ON ADAPTIVE SUPERGRATING

摘要

A novel DHI technique of precise targeting of moving object in space has been made. The major advantage of this technique is automatic self-adjustment of volume adaptive supersmall (0.12 mm) holographic grating in a new syntezed double doped photorefractive crystal of BTO. This results in the creation of 70 % diffraction efficiency adaptive holographic grating using 0.632 mm laser radiation. The targeting angle deviation of 10~(-6) radians in real time testing has been verified using low power CW He-Ne laser at a distance of 0.5 meter.