IT1045153B - Obiettivo ottico a focale variable - Google Patents
Obiettivo ottico a focale variableInfo
- Publication number
- IT1045153B IT1045153B IT68022/72A IT6802272A IT1045153B IT 1045153 B IT1045153 B IT 1045153B IT 68022/72 A IT68022/72 A IT 68022/72A IT 6802272 A IT6802272 A IT 6802272A IT 1045153 B IT1045153 B IT 1045153B
- Authority
- IT
- Italy
- Prior art keywords
- optical lens
- variable focal
- focal optical
- variable
- lens
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title 1
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Lens Barrels (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB826771 | 1971-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1045153B true IT1045153B (it) | 1980-05-10 |
Family
ID=9849218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT68022/72A IT1045153B (it) | 1971-03-31 | 1972-03-30 | Obiettivo ottico a focale variable |
Country Status (6)
| Country | Link |
|---|---|
| DD (1) | DD99858A5 (Direct) |
| DE (1) | DE2212535A1 (Direct) |
| FR (1) | FR2132334A6 (Direct) |
| GB (1) | GB1323221A (Direct) |
| IT (1) | IT1045153B (Direct) |
| NL (1) | NL7204399A (Direct) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2253281B (en) * | 1991-02-15 | 1994-05-25 | Asahi Optical Co Ltd | Zoom lens |
| WO2013057909A1 (ja) | 2011-10-20 | 2013-04-25 | 富士フイルム株式会社 | 投写用ズームレンズおよび投写型表示装置 |
-
1971
- 1971-03-31 GB GB826771A patent/GB1323221A/en not_active Expired
-
1972
- 1972-03-15 DE DE19722212535 patent/DE2212535A1/de active Pending
- 1972-03-30 IT IT68022/72A patent/IT1045153B/it active
- 1972-03-30 DD DD161930A patent/DD99858A5/xx unknown
- 1972-03-30 NL NL7204399A patent/NL7204399A/xx unknown
- 1972-03-31 FR FR7211501A patent/FR2132334A6/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2132334A6 (Direct) | 1972-11-17 |
| DE2212535A1 (de) | 1972-10-12 |
| DD99858A5 (Direct) | 1973-08-20 |
| GB1323221A (en) | 1973-07-11 |
| NL7204399A (Direct) | 1972-10-03 |
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