US3685884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1 x objective for projection printing
Assignee: Olympus Corp
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Filing: 1971-01-29
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Granted: 1972-08-22
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Expires: 1991-01-29
Abstract
Abstract 1 X OBJECTIVE FOR PROJECTION PRINTING HAVING A HIGH RESOLVING POWER. The objective consists of a forward and a rearward lens system identical to each other but arranged in symmetry with respect to a diaphragm located therebetween. Each of the lens systems comprises first to seventh lens components beginning at the side of the diaphragm and each of the lens components consists of a single lens element. In order to improve the aberrations of the objective, the first lens component is a positive lens element and the second lens component is a positive meniscus with its convex surfaces directed to the diaphragm, the third lens component being a negative meniscus with its convex surface directed to the diaphragm, the fourth lens component being a negative meniscus with its concave surfaces directed to the diaphragm while the fifth lens component is a positive lens element with one of its surfaces having a greater curvature than that of the other surface being concave toward the diaphragm and each of the sixth and seventh lens components is a positive lens element. Each of the lens systems satisfies the following conditions:
Inventors
- 👤 Kenichi Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:48
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
302 words
1 X OBJECTIVE FOR PROJECTION PRINTING HAVING A HIGH RESOLVING POWER WHICH CONSISTS OF A FORWARD AND REARWARD LENS SYSTEM IDENTICAL TO EACH OTHER AND LOCATED IN SPACED RELATIONSHIP FROM EACH OTHER IN SYMMETRY WITH RESPECT TO A DIAPHRAGM ARRANGED THEREBETWEEN, THE IMPROVEMENT COMPRISES THE FACT THAT EACH OF SAID LENS SYSTEMS COMPRISES FIRST TO SEVENTH LENS COMPONENTS SPACED FROM EACH OTHER BEGINNING AT THE SIDE OF SAID DIAPHRAGM AND EACH CONSISTING OF A SINGLE LENS ELEMENT, SAID FIRST LENS COMPONENT BEING OF A POSITIVE LENS ELEMENT, SAID SECOND LENS COMPONENT BEING OF A POSITIVE MENISCUS WITH ITS CONVEX SURFACES DIRECTED TOWARD SAID DIAPHRAGM, SAID THIRD LENS COMPONENT BEING OF A NEGATIVE MENISCUS WITH ITS CONVEX SURFACES DIRECTED TOWARD SAID DIAPHRAGM, SAID FOURTH LENS COMPONENT BEING OF A NEGATIVE MENISCUS WITH ITS CONCAVE SURFACES DIRECTED TOWARD SAID DIAPHRAGM, SAID FIFTH LENS COMPONENT BEING OF A POSITIVE LENS ELEMENT WITH ONE OF ITS SURFACES HAVING A GREATER CURVATURE THAN THAT OF THE OTHER SURFACE BEING CONCAVE TOWARD SAID DIAPHRAGM, WHILE EACH OF SAID SIXTH AND SEVENTH LENS COMPONENTS IS OF A POSITIVE LENS ELEMENT EACH OF SAID FORWARD AND REARWARD LENS SYSTEMS SATISFYING THE FOLLOWING CONDITIONS: 0.2F<D7 + D8 + D9<0.45F (1)0.12F<D6<0.4F (2)-0.45F<R7<-0.25F (3)0.33F<R6<0.53F (4) WHERE F THE FOCAL LENGTH OF EACH OF THE FORWARD AND REARWARD LENS SYSTEMS WHEN A PARALLEL LIGHT RAY IS INCIDENT TO EACH OF THE LENS SYSTEMS FROM THE SIDE OF THE DIAPHRAGM. DI (I 1, 2, --) THE THICKNESS OF THE LENS ELEMENT OR THE AIR GAP BETWEEN THE ADJACENT TWO LENS ELEMENTS OF THE RESPECTIVE LENS SYSTEMS BEGINNING AT THE SIDE OF THE DIAPHRAGM. RI (I 1, 2, --) THE RADIUS OF THE CURVATURE OF THE RESPECTIVE SURFACE OF EACH OF THE LENS ELEMENTS OF THE RESPECTIVE LENS SYSTEM BEGINNING AT THE SIDE OF THE DIAPHRAGM.
Claim 2
Dependent Claim
302 words
1 X OBJECTIVE FOR PROJECTION PRINTING HAVING A HIGH RESOLVING POWER WHICH CONSISTS OF A FORWARD AND REARWARD LENS SYSTEM IDENTICAL TO EACH OTHER AND LOCATED IN SPACED RELATIONSHIP FROM EACH OTHER IN SYMMETRY WITH RESPECT TO A DIAPHRAGM ARRANGED THEREBETWEEN, THE IMPROVEMENT COMPRISES THE FACT THAT EACH OF SAID LENS SYSTEMS COMPRISES FIRST TO SEVENTH LENS COMPONENTS SPACED FROM EACH OTHER BEGINNING AT THE SIDE OF SAID DIAPHRAGM AND EACH CONSISTING OF A SINGLE LENS ELEMENT, SAID FIRST LENS COMPONENT BEING OF A POSITIVE LENS ELEMENT, SAID SECOND LENS COMPONENT BEING OF A POSITIVE MENISCUS WITH ITS CONVEX SURFACES DIRECTED TOWARD SAID DIAPHRAGM, SAID THIRD LENS COMPONENT BEING OF A NEGATIVE MENISCUS WITH ITS CONVEX SURFACES DIRECTED TOWARD SAID DIAPHRAGM, SAID FOURTH LENS COMPONENT BEING OF A NEGATIVE MENISCUS WITH ITS CONCAVE SURFACES DIRECTED TOWARD SAID DIAPHRAGM, SAID FIFTH LENS COMPONENT BEING OF A POSITIVE LENS ELEMENT WITH ONE OF ITS SURFACES HAVING A GREATER CURVATURE THAN THAT OF THE OTHER SURFACE BEING CONCAVE TOWARD SAID DIAPHRAGM, WHILE EACH OF SAID SIXTH AND SEVENTH LENS COMPONENTS IS OF A POSITIVE LENS ELEMENT EACH OF SAID FORWARD AND REARWARD LENS SYSTEMS SATISFYING THE FOLLOWING CONDITIONS: 0.2F<D7 + D8 + D9<0.45F (1)0.12F<D6<0.4F (2)-0.45F<R7<-0.25F (3)0.33F<R6<0.53F (4) WHERE F THE FOCAL LENGTH OF EACH OF THE FORWARD AND REARWARD LENS SYSTEMS WHEN A PARALLEL LIGHT RAY IS INCIDENT TO EACH OF THE LENS SYSTEMS FROM THE SIDE OF THE DIAPHRAGM. DI (I 1, 2, --) THE THICKNESS OF THE LENS ELEMENT OR THE AIR GAP BETWEEN THE ADJACENT TWO LENS ELEMENTS OF THE RESPECTIVE LENS SYSTEMS BEGINNING AT THE SIDE OF THE DIAPHRAGM. RI (I 1, 2, --) THE RADIUS OF THE CURVATURE OF THE RESPECTIVE SURFACE OF EACH OF THE LENS ELEMENTS OF THE RESPECTIVE LENS SYSTEM BEGINNING AT THE SIDE OF THE DIAPHRAGM.
Claim 3
Dependent Claim
130 words
1 x objective according to claim 1 wherein each of said lens systems satisfies the following numerical data: r1 278.89d1 15.6 r2 2356.757d2 0.26n1 1.65609 delta 1 58.3r3 78.545d3 15.21r4 82.871d4 5.2 n2 1.63309 delta 260.2r5 133.472d5 15.6 r6 72.263d6 29.9 n3 1.67248 delta 3 33.8r7 -61.443d7 10.27r8 -533.146d8 13.0 n4 1.77436 delta 4 28.2r9 -421.171d9 30.42r10 -94.297d10 0.26n5 1.67253 delta 5 57.2r11 382.987d11 20.8 r12 -268.875d12 0.26n6 1.67253 delta 6 57.2r13 256.346d13 16.9 r14 Infinity n7 1.67253 delta 7 57.2 where: ni (i + 1, 2, --) the refractive index of the respective lens element with respect to g-line (435.8 m/ Mu ) beginning at the side of the diaphragm. i (i 1, 2, --) Abbe number of the respective lens element beginning at the side of the diaphragm.
Claim 4
Dependent Claim
127 words
1 x objective according to claim 1 wherein each of said lens systems satisfies the following numerical data: r1 355.03d1 d1 14.3 r2 -7248.597d2 0.39n1 1.80878 delta 1 47.4r3 104.81d3 15.6 r4 155.977d4 11.92n2 1.79194 delta 2 49.5 r5 201.7d5 13.88r6 74.832d6 51.27n3 1.77594 delta 3 27.7r7 -65.277d7 19.49r8 -1523.327d8 0.13n4 1.77594 delta 4 27.7r9 -3350.986d9 45.96r10 -107.584d10 0.39n5 1.765 delta 5 44.7r11 -1991.048d11 20.8 r12 -267.028d12 0.39n6 1.765 delta 644.7r13 228.103d13 22.1 r14 -1866.648n7 1.765 delta 7 44.7 where: ni (i 1, 2, --) the refractive index of the respective lens element with respect to g-line (435.8 m/ Mu ) beginning at the side of the diaphragm. i (i 1, 2, --) Abbe number of the respective lens element Beginning at the side of the diaphragm.
Claim 5
Dependent Claim
132 words
1 x objective according to claim 1, wherein each of said lens systems satisfies the following numerical data: r1 209.937d1 15.6 r2 Infinity d2 0.26n1 1.65607 delta 1 58.3r3 72.887d3 15.21r4 73.224d4 5.2 n2 1.63309 delta 2 60.2r5 119.457d5 15.6 r6 64.628d6 29.9 n3 1.67248 delta 3 33.8r7 -60.067d7 10.27r8 -806.74d8 13.0 n4 1.77436 delta 4 28.2r9 -557.99d9 30.42 r10 -91.731d10 0.26n5 1.67253 delta 5 57.2r11 309.686d11 20.8 r12 -287.775d12 0.26n6 1.67253 delta 6 57.2r13 284.333d13 16.9 r14 Infinity n7 1.67253 delta 7 57.2 where: ni (i 1, 2, --) the refractive index of the respective lens element with respect to g-line (435.8 m/ Mu ) beginning at the side of the diaphragm. i (i 1, 2, --) Abbe number of the respective lens element beginning at the side of the diaphragm.
Claim 6
Dependent Claim
129 words
1 x objective according to claim 1, wherein each of said lens systems satisfies the following numerical data: r1 269.408d1 15.6 r2 7921.127d2 0.26n1 1.65306 delta 1 60.2r3 78.831d3 15.6 r4 77.745d4 5.2 n2 1.63309 delta 2 60.2r5 135.759d5 15.6 r6 76.373d6 24.7 n3 1.69992 delta 3 32.1r7 -60.886d7 10.21r8 -434.159d8 13.0 n4 1.77436 delta 4 28.2r9 -349.637d9 30.37r10 -94.461d10 0.26n5 1.68446 delta 5 57.3r11 345.156d11 20.8 r12 -283.099d12 0.26n6 1.68446 delta 6 57.3r13 286.764d13 15.6 r14 -4680.446n7 1.68446 delta 7 57.3 where: ni (i 1, 2, --) the refractive index of the respective lens element with respect to g-line (435.8 m/(2 ) beginning at the side of the diaphragm. i (i 1, 2, --) Abbe number of the respective lens element beginning at the side of the diaphragm.
References Cited (Backward Citations)
US2481639A
Cited
US3504961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |