US3712702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic sight for daylight and night observation
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1970-09-30
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Granted: 1973-01-23
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Expires: 1990-09-30
Abstract
Abstract In a telescopic sight comprising two observation systems, one for use in daylight and one for use at night, means are provided for optically aligning either one of said observation systems with a light entry axis that is common to both systems. Further, an auxiliary lens system is disposed along said common light entry axis in front of said observation systems, said auxiliary means being adapted to displace the entrance pupils of said observation systems along said light entry axis in a forward direction. In specific embodiments of the invention a reticule and/or prismatic elements are part of the auxiliary lens system. The prismatic elements are disclosed to be adjustable to vary the direction of view of the telescope.
Inventors
- 👤 H Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:45
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
497 words
In combination with an armored enclosure having a thick wall of armor plate wherein the wall has a light admitting passage of small diameter to permit observation from within the enclosure, a telescopic apparatus comprising: A. An auxiliary lens system comprising: 1. a first convex lens at the outer end of the opening, 2. a second convex lens, the optical axis of which is aligned with the optical axis of the first lens, the second lens being adjacent to the inner end of the opening wherein light rays leaving the second lens are parallel to one another, B. A day observation system comprising: 1. a third convex lens the optical axis of which is aligned with the optical axis of the auxiliary lens system, 2. a fourth convex lens the optical axis of which is aligned with the third lens, C. A night observation system comprising: 1. a fifth convex lens, 2. an image intensifier the optical axis of which is aligned with the fifth lens, 3. a sixth convex lens the optical axis of which is aligned with the image intensifier, wherein the optical axis of the night observation system is parallel to the optical axis of the day observation system, D. Means for interposing the night observation system between the auxiliary lens system and the day observation system said means comprising: 1. a first fixed mirror before and at 45 to the optical axis of the fifth lens, 2. a second fixed mirror behind and at 45* to the optical axis of the sixth lens, 3. a first movable mirror pivotally positionable, a. in a first position behind the second lens of the auxiliary lens system at 45* to the optical axis of the second lens in alignment with the first fixed mirror, and b. in a second position out of alignment with the optical axis of the auxiliary lens system, 4. a second movable mirror pivotally positionable, a. in a first position before the third lens of the day observation system at 45* to the optical axis of the third lens in alignment with the second fixed mirror, and b. in a second position out of alignment with the optical axis of the day observation system, wherein day viewing is accomplished while the movable mirrors are each in the second position, wherein night viewing is accomplished while the movable mirrors are each in the first position; wherein parallel rays from the second lens strike the first movable mirror then the first fixed mirror before entering the night observation system; wherein parallel rays leaving the night observation system strike the second fixed mirror and the second movable mirror before entering the day observation system; Said armor plate wall having a thickness in excess of the length of the telescopic apparatus in which said auxiliary lens system is disposed within said opening in said armor plate wall; said opening in said armor plate wall being of insufficient cross-section to accomodate the passage of said telescopic apparatus.
Claim 2
Dependent Claim
497 words
In combination with an armored enclosure having a thick wall of armor plate wherein the wall has a light admitting passage of small diameter to permit observation from within the enclosure, a telescopic apparatus comprising: A. An auxiliary lens system comprising: 1. a first convex lens at the outer end of the opening, 2. a second convex lens, the optical axis of which is aligned with the optical axis of the first lens, the second lens being adjacent to the inner end of the opening wherein light rays leaving the second lens are parallel to one another, B. A day observation system comprising: 1. a third convex lens the optical axis of which is aligned with the optical axis of the auxiliary lens system, 2. a fourth convex lens the optical axis of which is aligned with the third lens, C. A night observation system comprising: 1. a fifth convex lens, 2. an image intensifier the optical axis of which is aligned with the fifth lens, 3. a sixth convex lens the optical axis of which is aligned with the image intensifier, wherein the optical axis of the night observation system is parallel to the optical axis of the day observation system, D. Means for interposing the night observation system between the auxiliary lens system and the day observation system said means comprising: 1. a first fixed mirror before and at 45 to the optical axis of the fifth lens, 2. a second fixed mirror behind and at 45* to the optical axis of the sixth lens, 3. a first movable mirror pivotally positionable, a. in a first position behind the second lens of the auxiliary lens system at 45* to the optical axis of the second lens in alignment with the first fixed mirror, and b. in a second position out of alignment with the optical axis of the auxiliary lens system, 4. a second movable mirror pivotally positionable, a. in a first position before the third lens of the day observation system at 45* to the optical axis of the third lens in alignment with the second fixed mirror, and b. in a second position out of alignment with the optical axis of the day observation system, wherein day viewing is accomplished while the movable mirrors are each in the second position, wherein night viewing is accomplished while the movable mirrors are each in the first position; wherein parallel rays from the second lens strike the first movable mirror then the first fixed mirror before entering the night observation system; wherein parallel rays leaving the night observation system strike the second fixed mirror and the second movable mirror before entering the day observation system; Said armor plate wall having a thickness in excess of the length of the telescopic apparatus in which said auxiliary lens system is disposed within said opening in said armor plate wall; said opening in said armor plate wall being of insufficient cross-section to accomodate the passage of said telescopic apparatus.
Claim 3
Dependent Claim
16 words
a second fixed mirror behind and at 45* to the optical axis of the sixth lens,
Claim 4
Dependent Claim
16 words
a second fixed mirror behind and at 45* to the optical axis of the sixth lens,
Claim 5
Dependent Claim
49 words
a second convex lens, the optical axis of which is aligned with the optical axis of the first lens, the second lens being adjacent to the inner end of the opening wherein light rays leaving the second lens are parallel to one another, B. A day observation system comprising:
Claim 6
Dependent Claim
49 words
a second convex lens, the optical axis of which is aligned with the optical axis of the first lens, the second lens being adjacent to the inner end of the opening wherein light rays leaving the second lens are parallel to one another, B. A day observation system comprising:
Claim 7
Dependent Claim
21 words
a fourth convex lens the optical axis of which is aligned with the third lens, C. A night observation system comprising:
Claim 8
Dependent Claim
21 words
a fourth convex lens the optical axis of which is aligned with the third lens, C. A night observation system comprising:
Claim 9
Dependent Claim
14 words
an image intensifier the optical axis of which is aligned with the fifth lens,
Claim 10
Dependent Claim
14 words
an image intensifier the optical axis of which is aligned with the fifth lens,
Claim 11
Dependent Claim
56 words
a sixth convex lens the optical axis of which is aligned with the image intensifier, wherein the optical axis of the night observation system is parallel to the optical axis of the day observation system, D. Means for interposing the night observation system between the auxiliary lens system and the day observation system said means comprising:
Claim 12
Dependent Claim
56 words
a sixth convex lens the optical axis of which is aligned with the image intensifier, wherein the optical axis of the night observation system is parallel to the optical axis of the day observation system, D. Means for interposing the night observation system between the auxiliary lens system and the day observation system said means comprising:
Claim 13
Dependent Claim
55 words
a first movable mirror pivotally positionable, a. in a first position behind the second lens of the auxiliary lens system at 45* to the optical axis of the second lens in alignment with the first fixed mirror, and b. in a second position out of alignment with the optical axis of the auxiliary lens system,
Claim 14
Dependent Claim
55 words
a first movable mirror pivotally positionable, a. in a first position behind the second lens of the auxiliary lens system at 45* to the optical axis of the second lens in alignment with the first fixed mirror, and b. in a second position out of alignment with the optical axis of the auxiliary lens system,
Claim 15
Dependent Claim
183 words
a second movable mirror pivotally positionable, a. in a first position before the third lens of the day observation system at 45* to the optical axis of the third lens in alignment with the second fixed mirror, and b. in a second position out of alignment with the optical axis of the day observation system, wherein day viewing is accomplished while the movable mirrors are each in the second position, wherein night viewing is accomplished while the movable mirrors are each in the first position; wherein parallel rays from the second lens strike the first movable mirror then the first fixed mirror before entering the night observation system; wherein parallel rays leaving the night observation system strike the second fixed mirror and the second movable mirror before entering the day observation system; Said armor plate wall having a thickness in excess of the length of the telescopic apparatus in which said auxiliary lens system is disposed within said opening in said armor plate wall; said opening in said armor plate wall being of insufficient cross-section to accomodate the passage of said telescopic apparatus.
Claim 16
Dependent Claim
183 words
a second movable mirror pivotally positionable, a. in a first position before the third lens of the day observation system at 45* to the optical axis of the third lens in alignment with the second fixed mirror, and b. in a second position out of alignment with the optical axis of the day observation system, wherein day viewing is accomplished while the movable mirrors are each in the second position, wherein night viewing is accomplished while the movable mirrors are each in the first position; wherein parallel rays from the second lens strike the first movable mirror then the first fixed mirror before entering the night observation system; wherein parallel rays leaving the night observation system strike the second fixed mirror and the second movable mirror before entering the day observation system; Said armor plate wall having a thickness in excess of the length of the telescopic apparatus in which said auxiliary lens system is disposed within said opening in said armor plate wall; said opening in said armor plate wall being of insufficient cross-section to accomodate the passage of said telescopic apparatus.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |