Remote Control and Automatic Focusing of Lenses
A servo-type of mechanism has been devised which automatically will maintain a lens in focus under the guidance of any one of a number of distance-measuring devices, or which may be arranged to replace the Selsyn-type of remote control for focusing a lens. The mechanism requires no special cam or nonlinear element to fit a particular lens, but automatically solves the equation of any lens for which it may be adjusted at the moment. When replacing a Selsyn system this servomechanism has the advantage that it can never get out of step. The system is particularly applicable to motion picture camera lenses in follow-focus work.
- Print ISSN
- 0097-5834
- Published
- 1947-08
- Content type
- Original Research
- DOI
- 10.5594/J17824
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