AT279925B - Lens with continuously variable focal length - Google Patents
Lens with continuously variable focal lengthInfo
- Publication number
- AT279925B AT279925B AT1053768A AT1053768A AT279925B AT 279925 B AT279925 B AT 279925B AT 1053768 A AT1053768 A AT 1053768A AT 1053768 A AT1053768 A AT 1053768A AT 279925 B AT279925 B AT 279925B
- Authority
- AT
- Austria
- Prior art keywords
- lens
- focal length
- continuously variable
- variable focal
- continuously
- 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
- G02B15/144—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 four groups only
- G02B15/1441—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 four groups only the first group being positive
- G02B15/144113—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 four groups only the first group being positive arranged +-++
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA58392A DE1278132B (en) | 1968-03-08 | 1968-03-08 | Lens with continuously changeable focal length |
Publications (1)
Publication Number | Publication Date |
---|---|
AT279925B true AT279925B (en) | 1970-03-25 |
Family
ID=6941597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT1053768A AT279925B (en) | 1968-03-08 | 1968-10-29 | Lens with continuously variable focal length |
Country Status (2)
Country | Link |
---|---|
AT (1) | AT279925B (en) |
DE (1) | DE1278132B (en) |
-
1968
- 1968-03-08 DE DEA58392A patent/DE1278132B/en active Pending
- 1968-10-29 AT AT1053768A patent/AT279925B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE1278132B (en) | 1968-09-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ELJ | Ceased due to non-payment of the annual fee |