Fine focus assembly for optical instruments

Details Fine focus assembly for optical instruments Fine focus assembly for optical instruments

G - Physics

02

B

88/109

G02B 7/04 (2006.01)

Patent

CA 1043144

ABSTRACT OF THE DISCLOSURE A fine focus assembly for an optical instrument is disclosed which includes a housing, a lens holding means and translation means for moving the lens holding means with respect to the housing. A planar spring member is provided which extends transversely to the longitudinal axis of rela- tive movement of the lens holding means with respect to the housing. The housing is fixedly secured to the spring member and the lens holding means is fixedly secured to the spring but spaced from the securement of the housing. A portion of the spring member is deflected transversely to its plane when the translation means provides a force for moving the lens holding means with respect to the housing. In addition, means are provided which are responsive to the amount of deflection for sensing the translation of the lens holding means with respect to the housing so that the fine focus assembly can be automatically, accurately and remotely controlled.

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