Photochromic light valve
Abstract
Abstract A LIGHT VALVE COMPRISES A PHOTOCHROMIC BODY WHICH CAN BE MADE TO CHANGE ITS INDEX OF REFRACTION BY IRRADIATING THE BODY WITH LIGHT OF A WAVELENGTH SPECIFIC FOR THE PHOTOCHROMIC MATERIAL OF THE BODY. THE PHOTOCHROMIC BODY IS COMBINED WITH MEANS FOR MODULATING A LIGHT SOURCE SO AS TO CAUSE AN IMAGE TO BE FORMED IN RESPONSE TO A REFRACTIVE INDEX CHANGE. FOR EXAMPLE, A PHOTOCHROMIC BODY MAY BE INCORPORATED IN A FABRY-PEROT CAVITY OR IN A WOLLASTON TYPE PRISM CONFIGURATION. CAN BE MADE TO CHANGE ITS INDEX OF REFRACTION BY IRRADIATING THE BODY WITH LIGHT OF A WAVELENGTH SPECIFIC FOR THE PHOTOCHROMIC MATERIAL OF THE BODY. THE PHOTOCHROMIC BODY IS COMBINED WITH MEANS FOR MODULATING A LIGHT SOURCE SO AS TO CAUSE AN IMAGE TO BE FORMED IN RESPONSE TO A REFRACTIVE INDEX CHANGE. FOR EXAMPLE, A PHOTOCHROMIC BODY MAY BE INCORPORATED IN A FABRY-PEROT CAVITY OR IN A WOLL .STON TYPE PRISM CONFIGURATION.
Inventors
- 👤 Zoltan J Kiss
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |