Adjusting mechanism for a lens

Details Adjusting mechanism for a lens Adjusting mechanism for a lens

1991-03-04

1992-08-11

Arnold, Bruce Y.

Optical: systems and elements

Lens

With support

359819, G02B 704

Patent

active

051384965

ABSTRACT:
An adjusting mechanism for a lens comprises a mount, a sphere, a pressing ring, a positioning housing, a fixing ring, a lens, and an adjusting ring. Three protruding members are provided radially and horizontally around the circumference of the sphere. The sphere is stably disposed on the mount in an opening having a spherical surface provided on the center of the mount by three tension springs each secured between the protruding members and the mount. The inside of the sphere forms cylindrical space to accommodate the lens. The lens only axially moves with respect to the sphere by turning an adjusting ring screwed onto the sphere. The positioning housing is fixed on the mount around the sphere and the fixing ring is fastened on the top of the positioning housing. The pressing ring being disposed between the fixing ring and the sphere pushes against the surface of the sphere by the pressing of a circular flange provided along the inner rim of the fixing ring such that the sphere is restricted to rotate in the space formed between the pressing ring and the mount. The sphere rotates in three dimensions to adjust the lens precisely by turning three adjusting screws, wherein each adjusting screw comes into contact with the protruding member.

REFERENCES:
patent: 4496217 (1985-01-01), Aoyagi
patent: 4946255 (1990-08-01), Mizoguchi et al.
patent: 5050963 (1991-09-01), Murakami

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