Momentum-balance mechanism for use with a scan mirror or other c

Details Momentum-balance mechanism for use with a scan mirror or other c Momentum-balance mechanism for use with a scan mirror or other c

1990-08-29

1991-08-20

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359876, 359223, G02B 2608

Patent

active

050408607

ABSTRACT:
A momentum balance-mechanism is disclosed in which a mirror or other object which must be rapidly dithered around tip and tilt axes is supported above a base. The momentum balance-mechanism permits rapid dithering of the mirror or other mechanism while minimizing the reaction forces generated by rotation of the mirror or other object. The mirror which is subject to being dithered and a balance weight are independently supported to permit each to rotate about a common center in opposite directions to achieve a momentum-balanced scanning system. The mirror and balance weight are independently supported by two concentrically-located tripods which terminate in a common support base at one end and in two interface fittings at the other end. One of the interface fittings supports the mirror while the other interface fitting supports the balance weight. The mirror and the balance weight rotate about the virtual intersection of the two sets of tripod legs.

REFERENCES:
patent: 4100576 (1978-07-01), Ditthardt
patent: 4270048 (1981-05-01), Liebing
patent: 4376572 (1983-03-01), Gijzen
patent: 4660941 (1987-04-01), Hattori et al.
patent: 4705365 (1987-11-01), Wakita et al.

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