公开(公告)号：US3901578A

公开(公告)日：1975-08-26

申请号：US45204474

申请日：1974-03-18

Applicant: RCA CORP

Inventor： HUDSON KENNETH CLIFFORD

IPC: G02B5/32 ,  G03H1/28 ,  G02B27/00

CPC classification number: G02B27/0944 ,  G02B5/32 ,  G03H1/0248 ,  G03H1/265 ,  G03H1/28 ,  G03H2001/0413 ,  G03H2222/34

Abstract: The average radiance obtainable from an illuminator comprising a plurality of separate spaced light sources, such as laser diodes, which individually radiate light that is at least partially coherent, is increased by means of a recorded hologram which, when illuminated by the spaced light sources, derives a single resultant output light beam.