Compensation means for polarized light electro-optical modulator

摘要: When a polarized light beam is electro-optically modulated as it passes through birefringent crystal there are created observed divergent beams caused by internal diffraction. In order to eliminate these from the central so avoid distortion interference between and main beam, converging lens placed source of converge at point substantially distant output crystal. At beyond focal length an aperture aligned with size equal but small enough not pass any beams, thus eliminating allowing just properly modulated, aperture.