CH399770A - Pancratic lens for recording and playback purposes - Google Patents
Pancratic lens for recording and playback purposesInfo
- Publication number
- CH399770A CH399770A CH1144161A CH1144161A CH399770A CH 399770 A CH399770 A CH 399770A CH 1144161 A CH1144161 A CH 1144161A CH 1144161 A CH1144161 A CH 1144161A CH 399770 A CH399770 A CH 399770A
- Authority
- CH
- Switzerland
- Prior art keywords
- recording
- pancratic lens
- playback purposes
- playback
- purposes
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
- G02B15/1455—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative
- G02B15/145527—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative arranged -+-++
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Telescopes (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV15795A DE1094480B (en) | 1959-01-21 | 1959-01-21 | Pancratic lens for recording and playback purposes |
DEV0021158 | 1961-08-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH399770A true CH399770A (en) | 1965-09-30 |
Family
ID=26001327
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH860A CH399769A (en) | 1959-01-21 | 1960-01-04 | Fast pancratic lens |
CH1144161A CH399770A (en) | 1959-01-21 | 1961-10-02 | Pancratic lens for recording and playback purposes |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH860A CH399769A (en) | 1959-01-21 | 1960-01-04 | Fast pancratic lens |
Country Status (5)
Country | Link |
---|---|
CH (2) | CH399769A (en) |
DE (1) | DE1094480B (en) |
FR (1) | FR1247591A (en) |
GB (2) | GB949465A (en) |
NL (2) | NL121784C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5264965A (en) * | 1991-02-15 | 1993-11-23 | Asahi Kogaku Kogyo Kabushiki Kaisha | Zoom lens |
-
0
- NL NL247454D patent/NL247454A/xx unknown
- NL NL121784D patent/NL121784C/xx active
-
1959
- 1959-01-21 DE DEV15795A patent/DE1094480B/en active Pending
-
1960
- 1960-01-04 CH CH860A patent/CH399769A/en unknown
- 1960-01-18 GB GB1749/60A patent/GB949465A/en not_active Expired
- 1960-01-21 FR FR816258A patent/FR1247591A/en not_active Expired
-
1961
- 1961-10-02 CH CH1144161A patent/CH399770A/en unknown
-
1962
- 1962-07-10 GB GB26555/62A patent/GB1016881A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB949465A (en) | 1964-02-12 |
DE1094480B (en) | 1960-12-08 |
FR1247591A (en) | 1960-12-02 |
NL121784C (en) | |
NL247454A (en) | |
GB1016881A (en) | 1966-01-12 |
CH399769A (en) | 1965-09-30 |
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