US3694056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pancratic projection lens
Assignee: RAIMUND HAUSER
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Filing: 1970-08-04
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Granted: 1972-09-26
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Expires: 1990-08-04
Abstract
Abstract The lens comprises a negative first unit consisting of a first lens element having a convex rear surface, a positive second lens unit consisting of a biconvex second lens element, which is displaceable along the optical axis of the lens, and a positive main lens unit consisting of a positive third lens element, a negative fourth lens element, and a final lens element. Said lens elements are arranged along the optical axis in the order stated. The main lens unit meets the condition
Inventors
- 👤 Trude Muszumanski
- 👤 Gunter Kurz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:10
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/143; G02B15/1435; G02B15/143507
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
231 words
A pancratic projection lens, which defines an optical axis and comprises a negative first lens unit consisting of a first lens element having a convex rear surface, a positive second lens unit consisting of a biconvex second lens element, which is displaceable along said optical axis, a positive main lens unit consisting of a positive third lens element, a negative fourth lens element, and a final lens element, and in which said lens elements are arranged along said optical axis in the order stated, r1 - 2.610 d1 0.064 nd 1.620 v 36.4 r2 - 5.802 d2 2.126- 0.009 r3 + 5.263 d3 0.144 nd 1.620 v 60.3 r4 5.263 d4 0.023- 2.140 r5 + 0.720 d5 0.266 nd 1.620 v 60.3 r6 -19.093 d6 0.178 r7 - 1.170 d7 0.254 nd 1.667 v 33.0 r8 + 0.489 d8 0.052 r9 + 0.688 d9 0.208 nd 1.641 v 60.1 r10 - 0.891 where r1 to r10 are the radii of successive lens element surfaces in millimeters, d1 to d9 are the vertex distances between adjacent lens element surfaces in millimeters, nd to nd are the indices of refraction of lens elements having the corresponding surfaces for the yellow helium line, and v1,2 to v9,10 are the Abbe numbers of the lens elements having corresponding surfaces, the relative aperture is f/1.6 and the overall local length f is 1.000 to 1.635 millimeters.
Claim 2
Dependent Claim
231 words
A pancratic projection lens, which defines an optical axis and comprises a negative first lens unit consisting of a first lens element having a convex rear surface, a positive second lens unit consisting of a biconvex second lens element, which is displaceable along said optical axis, a positive main lens unit consisting of a positive third lens element, a negative fourth lens element, and a final lens element, and in which said lens elements are arranged along said optical axis in the order stated, r1 - 2.610 d1 0.064 nd 1.620 v 36.4 r2 - 5.802 d2 2.126- 0.009 r3 + 5.263 d3 0.144 nd 1.620 v 60.3 r4 5.263 d4 0.023- 2.140 r5 + 0.720 d5 0.266 nd 1.620 v 60.3 r6 -19.093 d6 0.178 r7 - 1.170 d7 0.254 nd 1.667 v 33.0 r8 + 0.489 d8 0.052 r9 + 0.688 d9 0.208 nd 1.641 v 60.1 r10 - 0.891 where r1 to r10 are the radii of successive lens element surfaces in millimeters, d1 to d9 are the vertex distances between adjacent lens element surfaces in millimeters, nd to nd are the indices of refraction of lens elements having the corresponding surfaces for the yellow helium line, and v1,2 to v9,10 are the Abbe numbers of the lens elements having corresponding surfaces, the relative aperture is f/1.6 and the overall local length f is 1.000 to 1.635 millimeters.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |