Making method of multibranching hologram photo coupler

Abstract

Abstract PURPOSE:To enhance accuracy with a simple constitution by letting the laser beam split to plural beams form images behind an acousto-optic element and splitting one beam to multibeams by this imaged light and the laser beam from another light source. CONSTITUTION:If in the state where the laser beam A is being radiated toward an acousto-optic element 3 the drive signal S combined with the carriers of different frequencies f1, f2...fn is applied to the element 3, then the beam A is diffracted and split by the angles corresponding to the frequencies and wavelengths and the split beams emit like codes L1, L2...Ln. These beams L1, L2...Ln are used as writing beams in creating a hologram and these are refracted and emitted so as to focus at the specified positions P1, P2...Pn by the disposition of a lens 6. A photoreceptor H0 is placed on the way of the optical path and a hologram is formed thereon. A laser beam B as reference light is superposedly radiated to the photoreceptor H0, whereby the multibranching holocoupler H1 is formed.

Inventors

• 👤 Hideo Segawa

Bibliographic Details