Variable beam splitter having opposed alternating convex and con

Details Variable beam splitter having opposed alternating convex and con Variable beam splitter having opposed alternating convex and con

1996-11-22

2000-09-05

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

G02B 2710

Patent

active

061151815

ABSTRACT:
An optical modulator (19) utilizes a variable beam splitter arrangement having two separate plano-periodic cylindrical lens arrays (20 and 22) arranged as a sandwiched air-spaced assembly with the plano surfaces facing outwardly from the assembly. The assembly further includes a means (26) for controllably translating or moving one of the lenses relative to the other. The periodic array is formed as alternating concave and convex cylindrical structures. In a nominal setting, the optical axes of the concave structures of one of the lens arrays are aligned with the optical axes of the convex structures of the other so that the assembly acts as an afocal window having little impact when placed in an optical system. To adjust the beam splitting properties, one lens array is slightly translated with respect to the other to cause controlled misalignment of the two lens array surfaces.

REFERENCES:
patent: 4305643 (1981-12-01), Tosswill
patent: 5337181 (1994-08-01), Kelly
patent: 5392157 (1995-02-01), Shih
patent: 5463498 (1995-10-01), Gal et al.
patent: 5471345 (1995-11-01), Gal et al.
patent: 5479026 (1995-12-01), Schumtz et al.
patent: 5581408 (1996-12-01), Schumtz et al.
patent: 5615048 (1997-03-01), Davies et al.
patent: 5775799 (1998-07-01), Forkner
patent: 5805340 (1998-09-01), Kelly

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