Patent US3235397A successfully refreshed from Google Patents.
US3235397A
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Reflection-reducing arrangements
Assignee: C Reichert Optische Werke AG
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Filing: 1962-04-19
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Granted: 1966-02-15
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Millendorfer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:07
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; G02B1/115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
AN OPTICAL COMPONENT HAVING A BODY WITH AT LEAST ONE SURFACE THROUGH WHICH RADIATION OF THE NATURE OF LIGHT WITHIN A SELECTED RANGE OF WAVELENGTHS IS REQUIRED TO BE TRANSMITTED, IN WHICH AN ANIT-REFLECTIVE LIGHT PERMEABLE COATING IS CARRIED ON SAID SURFACE, SAID COATING CONSISTING OF P LAYERS HAVING ALTERNATIVELY A HIGH INDEX OF REFRACTION AND A LOW INDEX OF REFRACTION, WHERE P IS NOT LESS THAN FOUR AND THE SUM OF THE OPTICAL THICKNESSES OF THE INNER (P-L) OF SAID LAYERS IS EQUAL TO THREE-EIGHTHS OF ONE WAVELENGTH OF RADIATION LYING WITHIN SAID RANGE, THE INDEX OF REFRACTION OF THE OUTMOST LAYER BEING LESS THAN THE INDEX OF REFRACTION OF THE ADJACENT LAYER, AND THE OPTICAL THICKNESS OF SAID OUTERMOST LAYER BEING SELECTED TO REDUCE REFLECTION TO A MINIMUM.
Claim 2
Dependent Claim
130 words
AN OPTICAL COMPONENT HAVING A BODY WITH AT LEAST ONE SURFACE THROUGH WHICH RADIATION OF THE NATURE OF LIGHT WITHIN A SELECTED RANGE OF WAVELENGTHS IS REQUIRED TO BE TRANSMITTED, IN WHICH AN ANIT-REFLECTIVE LIGHT PERMEABLE COATING IS CARRIED ON SAID SURFACE, SAID COATING CONSISTING OF P LAYERS HAVING ALTERNATIVELY A HIGH INDEX OF REFRACTION AND A LOW INDEX OF REFRACTION, WHERE P IS NOT LESS THAN FOUR AND THE SUM OF THE OPTICAL THICKNESSES OF THE INNER (P-L) OF SAID LAYERS IS EQUAL TO THREE-EIGHTHS OF ONE WAVELENGTH OF RADIATION LYING WITHIN SAID RANGE, THE INDEX OF REFRACTION OF THE OUTMOST LAYER BEING LESS THAN THE INDEX OF REFRACTION OF THE ADJACENT LAYER, AND THE OPTICAL THICKNESS OF SAID OUTERMOST LAYER BEING SELECTED TO REDUCE REFLECTION TO A MINIMUM.
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |