Automatic focusing for cameras
Abstract
Abstract A PHOTOGRAPHIC CAMERA WHEREIN A LIGHT SURCE EMITS AN INTERMITTEN BEAM WHICH ISMOVED ANGULARLY TO SWEEP THE FIELD OF THE CAMERA LENS. THE MOTION OF THE LIGHT SOURCE IS LINKED TO AND CALIBRATED WITH CONCOMITANT MOTION OF THE LENS-FOCUS-ADJUSTMENT, SO THAT THE LENS IS ALWAYS FOCUSED FOR THE DISTANCE FROM LENS TO THE POINT AT WHICH THE LIGHT BEAM CROSSES A LINE-OF-SIGHT PATH BETWEEN THE LENS AND THE OBJECT. A SENSOR, SELECTIVELY RESPONSIVE TO THE INTERMITTENT LIGHT BEAMED BY THE LIGHT SOURCE, IS POSITIONED TO RECEIVE LIGHT REFLECTED FROM THE OBJECT AND, UPON RECEIVING THIS REFLECTED LIGHT, THE DISPLACEMENT OF THE FOCUS-ADJUSTMENT IS ARRESTED THUS POSITIONING AND HOLDING THE CAMERA LENS AT THE CORRECT RANGE ADJUSTMENT.
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Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |