Lens movement actuated reference and sequencing means for...

Details Lens movement actuated reference and sequencing means for... Lens movement actuated reference and sequencing means for...

G - Physics

03

B

342/15, 95/62

G03B 13/18 (2006.01) G01S 15/10 (2006.01) G02B 7/32 (2006.01)

Patent

CA 1122455

ABSTRACT OF THE DISCLOSURE A unidirectional focus control system for a variable focus lens moves said lens outside of its normal focusing range in order to establish a reliable reference point to which or from which said lens is moved for variable focus lens focusing. In addition, lens movement outside of its normal focusing range provides the means for actuating switch means whose actuation initiates or inhibits the initiation of an event or a series of events.

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