Apparatus to transform a single laser beam into two parallel bea

Details Apparatus to transform a single laser beam into two parallel bea Apparatus to transform a single laser beam into two parallel bea

1974-05-15

1976-10-05

Rubin, David H.

350152, G02B 2710, G02B 2728

Patent

active

039841537

ABSTRACT:
An optomechanical apparatus is described which transforms a single laser beam into two parallel beams of adjustable spacing and intensity. The distance between the two output beams can be varied continuously over a wide range, and the distance between the output beams can be reduced to zero. By splitting a polarized laser beam into two beams of orthogonal polarization with a polarization beam splitter, by redirecting the reflected beam with a stationary roof prism, a stationary pentaprism, and a moveable pentaprism such that the reflected beam is rereflected by the opposite side of the polarization beam splitter, two beams of variable intensity and of nominal parallelism are produced. A suitably placed pair of counterrotating wedges permits alignment of the beams to a high degree of parallelism.

REFERENCES:
patent: 1505877 (1924-08-01), Eppenstein
patent: 3817624 (1974-06-01), Martin
hoffman, Article in IBM Technical Disclosure Bulletin, vol. 8, No. 11, Apr., 1966, p. 1554.

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