FR1213899A - Enhancements to Variable Focal Length Optical Lens Control Systems - Google Patents
Enhancements to Variable Focal Length Optical Lens Control SystemsInfo
- Publication number
- FR1213899A FR1213899A FR1213899DA FR1213899A FR 1213899 A FR1213899 A FR 1213899A FR 1213899D A FR1213899D A FR 1213899DA FR 1213899 A FR1213899 A FR 1213899A
- Authority
- FR
- France
- Prior art keywords
- enhancements
- focal length
- optical lens
- control systems
- lens control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
-
- 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
- G02B15/143—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 three groups only
- G02B15/1431—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 three groups only the first group being positive
- G02B15/143105—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 three groups only the first group being positive arranged +-+
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Telescopes (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18134/58A GB899635A (en) | 1958-06-06 | 1958-06-06 | Improvements in or relating to control devices for optical objectives of variable focal length |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1213899A true FR1213899A (en) | 1960-04-05 |
Family
ID=10107230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1213899D Expired FR1213899A (en) | 1958-06-06 | 1958-11-03 | Enhancements to Variable Focal Length Optical Lens Control Systems |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH367642A (en) |
FR (1) | FR1213899A (en) |
GB (1) | GB899635A (en) |
NL (1) | NL232999A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1136131B (en) * | 1960-06-18 | 1962-09-06 | Elbe Kamera Gmbh | Lens with variable focal length |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000072A1 (en) * | 1977-07-28 | 1979-02-22 | D Pandres | Ratio preserving control system |
US4156933A (en) * | 1977-07-28 | 1979-05-29 | Pandres Dave Jr | Ratio preserving control system |
JPS5952402B2 (en) * | 1980-02-18 | 1984-12-19 | 株式会社三協精機製作所 | zoom lens barrel |
GB2237406B (en) * | 1989-10-27 | 1993-11-03 | Asahi Optical Co Ltd | Zoom lens barrel |
-
0
- NL NL232999D patent/NL232999A/xx unknown
-
1958
- 1958-06-06 GB GB18134/58A patent/GB899635A/en not_active Expired
- 1958-11-03 CH CH6573058A patent/CH367642A/en unknown
- 1958-11-03 FR FR1213899D patent/FR1213899A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1136131B (en) * | 1960-06-18 | 1962-09-06 | Elbe Kamera Gmbh | Lens with variable focal length |
Also Published As
Publication number | Publication date |
---|---|
CH367642A (en) | 1963-02-28 |
GB899635A (en) | 1962-06-27 |
NL232999A (en) |
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