CH405749A - Lichtstarkes Projektionsobjektiv veränderlicher Brennweite - Google Patents
Lichtstarkes Projektionsobjektiv veränderlicher BrennweiteInfo
- Publication number
- CH405749A CH405749A CH1473963A CH1473963A CH405749A CH 405749 A CH405749 A CH 405749A CH 1473963 A CH1473963 A CH 1473963A CH 1473963 A CH1473963 A CH 1473963A CH 405749 A CH405749 A CH 405749A
- Authority
- CH
- Switzerland
- Prior art keywords
- focal length
- projection lens
- variable focal
- bright projection
- bright
- 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
- G02B15/146—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 more than five groups
- G02B15/1461—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 more than five groups the first group being positive
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA41769A DE1187825B (de) | 1962-12-01 | 1962-12-01 | Lichtstarkes Projektionsobjektiv veraenderlicher Brennweite |
Publications (1)
Publication Number | Publication Date |
---|---|
CH405749A true CH405749A (de) | 1966-01-15 |
Family
ID=6932718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1473963A CH405749A (de) | 1962-12-01 | 1963-12-02 | Lichtstarkes Projektionsobjektiv veränderlicher Brennweite |
Country Status (4)
Country | Link |
---|---|
US (1) | US3348898A (de) |
CH (1) | CH405749A (de) |
DE (1) | DE1187825B (de) |
GB (1) | GB978555A (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3532414A (en) * | 1966-09-03 | 1970-10-06 | Nippon Kogaku Kk | Continuous magnification lens system |
AT290162B (de) * | 1969-09-26 | 1971-05-25 | Eumig | Pankratisches Objektiv hoher Lichtstärke |
JPS5647533B2 (de) * | 1973-12-14 | 1981-11-10 | ||
JPS5535334A (en) * | 1978-09-01 | 1980-03-12 | Fuji Photo Optical Co Ltd | Posterior iris zoom lens |
US5028125A (en) * | 1989-04-05 | 1991-07-02 | Ricoh Company, Ltd. | Zoom finder of real image type |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1120692A (fr) * | 1955-01-28 | 1956-07-10 | Système optique à grossissement variable | |
US3023673A (en) * | 1958-12-12 | 1962-03-06 | Bell & Howell Co | Variable magnification afocal lens member |
DE1248326B (de) * | 1961-08-15 | 1967-08-24 | Nippon Kogaku Kk | Pankratisches Objektiv |
-
1962
- 1962-12-01 DE DEA41769A patent/DE1187825B/de active Pending
-
1963
- 1963-11-25 US US325815A patent/US3348898A/en not_active Expired - Lifetime
- 1963-11-27 GB GB46903/63A patent/GB978555A/en not_active Expired
- 1963-12-02 CH CH1473963A patent/CH405749A/de unknown
Also Published As
Publication number | Publication date |
---|---|
GB978555A (en) | 1964-12-23 |
DE1187825B (de) | 1965-02-25 |
US3348898A (en) | 1967-10-24 |
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