Optical device with entrance and exit paths that are stationary

Details Optical device with entrance and exit paths that are stationary Optical device with entrance and exit paths that are stationary

1998-01-23

2000-06-13

Turner, Samuel A.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01B 902

Patent

active

060755997

ABSTRACT:
An rotating optical device in which the angular relationship of the exit beam to the incident beam is independent of the degree of rotation of the device. Two optical elements are defined by planes that intersect at a 45.degree. angle. A third optical element is defined by a plane that bisects the 45.degree. angle. The device is rotated about the line included by all three planes. In an embodiment of the device configured as a Sagnac interferometer, the first two optical elements are reflectors and the third element is a beamsplitter. Preferably, up to eight such interferometers are mounted on the same rotating platform and with the same rotational axis, for extended spectral bandwidth. The scope of the invention also includes spectral imaging devices based on such interferometers.

REFERENCES:
patent: 3814935 (1974-06-01), Kissel
patent: 3861788 (1975-01-01), Webster
patent: 5539517 (1996-07-01), Cabib et al.

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