Contrast photometer
Abstract
Abstract AN APPARATUS AND METHOD FOR INSTRUMENT DETERMINATION OF THE EFFECTIVENESS OF MILITARY OBSCURATION SYSTEMS BY THE DETERMINATION OF THE RATIO OF CLOUD REFLECTANCE TO COLD TRANSMITTANCE AS RELATED TO THE VISUAL CONTRAST DETERMINED BY A CONTRAST PHOTOMETER. THE METHOD AND APPARATUS CAN ALSO BE UTILIZED TO OBSERVE INDUSTRIAL SMOKE CLOUDS TO ASCERTAIN WHETHER OR NOT PARTICULATE MATTER OF THE CLOUD EXCEEDS THE MAXIMUM ALLOWABLE AMOUNT WITHIN POLLUTION CONTROL STANDARDS. AFOREMENTIONED INSTRUMENT DETERMINATION AND UTILITY IS ACCOMPLISHED BY AN APPARATUS AND METHOD WHICH EMPLOYS AN OPTICAL SYSTEM HAVNG AN OSCILLATING MIRROR MEANS THEREIN AND A PHOTOMULTIPLIER MEANS THEREIN? THE MIRROR MEANS BEING USED TO RECEIVE LIGHT WAVES FROM THE SOURCE BEING STUDIED BY THE PHOTOMETER AND TO TRANSMIT THE LIGHT WAVE TO A PHOTOMULTIPLIER MEANS TO CONVERT THE LIGHT WAVES INTO ELECTRICAL IMPULSES.
Inventors
- 👤 Earl S Rosenblum
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |