Optical distance gage
Abstract
Abstract AN INSTRUMENT FOR MEANSURING DISTANCE TO BODIES HAVING REFLECTIVE SURFACES AND WITHOUT MECHANICAL CONTACT THEREWITH UTILIZES AN INTENSE LIGHT SOURCE, ROTATABLE MIRROR, PHOTO-DETECTOR AND READ-OUT MEANS. THE PHOTO-DETECTOR, MIRROR AND REFLECTIVE SURFACE BODY ARE ORIENTED TO FORM A RIGHT TRIANGLE HAVING A FIRST SIDE OF THE RIGHT ANGLE BEING OF KNOWN LENGTH Y CORRESPONDING TO THE KNOWN DISTANCE FROM THE CENTER OF THE ROTATABLE MIRROR TO THE OPTICAL AXIS OF THE PHOTO-DETECTOR. THE SECOND SIDE OF THE RIGHT ANGLE IS THE UNKNOWN LENGTH X CORRESPONDING TO THE UNKNOWN DISTANCE ALONG THE PHOTO-DETECTOR OPTICAL AXIS FROM THE INSTRUMENT TO THE REFLECTIVE SURFACE BODY. THE READ-OUT MEANS MEASURES THE ANGLE A BETWEEN THE HYPOTENUSE OF THE RIGHT TRIANGLE AND SIDE Y TO THEREBY DETERMINE THE UNKNOWM DISTANCE X FROM THE GEOMETRIC RELATIONSHIP X=Y TAN A.
Inventors
- 👤 Gerald J Carlson
Bibliographic Details
Claims Analysis
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |