Single-wavelength emission device

Details Single-wavelength emission device Single-wavelength emission device

1995-10-19

1998-10-06

Henry, Jon W.

Optical: systems and elements

Holographic system or element

Having particular recording medium

359 15, 359 16, 359 19, G03H 100

Patent

active

058186140

ABSTRACT:
This device comprises an optical source emitting a single-wavelength light beam. An index grating has been recorded in a holographic device by the interference of two plane light beams, both being beams at a single wavelength with one and the same determined value and being concurrent in the holographic device. The holographic device is illuminated by the light beam and delivers a single-wavelength beam whose radiation pattern has a limited angular passband. The wavelength of the reading beam may be different from that of the recording beams. Its orientation is then different from that of the beams.

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