Alignment stabilization prism

Details Alignment stabilization prism Alignment stabilization prism

1981-12-03

1985-03-05

Buczinski, S. C.

Optics: measuring and testing

Angle measuring or angular axial alignment

With photodetection remote from measured angle

350173, 350401, 350402, 356138, 356365, G01B 1126

Patent

active

045027838

ABSTRACT:
Apparatus (20) provides a stable optical reference in the presence of optical source jitter. It comprises a beamsplitter cube (21) having an input surface 22, an output surface 23, a totally reflecting surface (24), and a partially reflecting diagonal surface (26) with a corner cube 27 disposed on a surface (25) opposite to the input surface. An input beam (30) applied to the beamsplitter cube results in two output beams (33, 33'), coplanar with an output optical axis (31), if the input beam deviates at 32 from an input optical axis. The two output beams deviate equally but oppositely from the output axis. This provides signals from which a stable output optical axis may be determined. A polarization-sensitive embodiment is also disclosed which eliminates problems associated with the use of coherent light sources.

REFERENCES:
patent: 3346319 (1967-10-01), Billings
patent: 3389632 (1968-06-01), Plummer
patent: 3601613 (1971-08-01), Hock
patent: 3612694 (1971-10-01), Mottier
patent: 3677621 (1972-07-01), Smith
patent: 3844638 (1974-10-01), Lingenfelder

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