RU99107027A - TV FOCUS WITH INTERNAL FOCUS - Google Patents
TV FOCUS WITH INTERNAL FOCUSInfo
- Publication number
- RU99107027A RU99107027A RU99107027/28A RU99107027A RU99107027A RU 99107027 A RU99107027 A RU 99107027A RU 99107027/28 A RU99107027/28 A RU 99107027/28A RU 99107027 A RU99107027 A RU 99107027A RU 99107027 A RU99107027 A RU 99107027A
- Authority
- RU
- Russia
- Prior art keywords
- positive
- component
- focus
- lens
- negative
- Prior art date
Links
- 230000003287 optical Effects 0.000 claims 3
- 230000005499 meniscus Effects 0.000 claims 2
Claims (1)
1,0 ≅ f11/f ≅ 3,0 (1)
0,3 ≅ d3/f ≅ 0,8 (2)
νI+ > 50 (3)
νI+ - νI- > 23
νII- > 27 (4)
νII+ > 50A telephoto lens with internal focusing, consisting of the first and second optical components with positive refractive power, arranged successively in the direction of the optical beam propagation, consisting of positive and negative lenses, the first component containing glued positive and negative lenses, and the second has the ability to move along the optical axis of the device , characterized in that the second component is glued from a negative meniscus facing its convex surface to nstvu object, and a positive lens, the focal length f of the entire system, the focal length f 11 of the second component, the interval d 3 between the first and second components ν I +, ν I-, ν II-, ν II + - Abbe materials respectively first positive and the second negative lens of the first component, the negative meniscus and the positive lens of the second component satisfy the following conditions:
1.0 ≅ f 11 / f ≅ 3.0 (1)
0.3 ≅ d3 / f ≅ 0.8 (2)
ν I + > 50 (3)
ν I + - ν I- > 23
ν II- > 27 (4)
ν II + > 50
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU99107027A RU2208821C2 (en) | 1999-03-31 | 1999-03-31 | Telephoto lens with internal focusing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU99107027A RU2208821C2 (en) | 1999-03-31 | 1999-03-31 | Telephoto lens with internal focusing |
Publications (2)
Publication Number | Publication Date |
---|---|
RU99107027A true RU99107027A (en) | 2001-01-20 |
RU2208821C2 RU2208821C2 (en) | 2003-07-20 |
Family
ID=29208893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU99107027A RU2208821C2 (en) | 1999-03-31 | 1999-03-31 | Telephoto lens with internal focusing |
Country Status (1)
Country | Link |
---|---|
RU (1) | RU2208821C2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2630467C1 (en) * | 2016-04-01 | 2017-09-08 | Публичное акционерное общество "Красногорский завод им. С.А. Зверева" | Telephoto lens |
-
1999
- 1999-03-31 RU RU99107027A patent/RU2208821C2/en active
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