GB1066502A - Improvements in or relating to optical objectives of variable equivalent focal length - Google Patents
Improvements in or relating to optical objectives of variable equivalent focal lengthInfo
- Publication number
- GB1066502A GB1066502A GB43079/62A GB4307962A GB1066502A GB 1066502 A GB1066502 A GB 1066502A GB 43079/62 A GB43079/62 A GB 43079/62A GB 4307962 A GB4307962 A GB 4307962A GB 1066502 A GB1066502 A GB 1066502A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- mount
- diaphragm
- stationary
- pin
- 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
-
- 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
- G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
-
- 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
- G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Microscoopes, Condenser (AREA)
Abstract
1,066,502. Lens mounts; diaphragms. RANK PRECISION INDUSTRIES Ltd., [trading as RANK ORGANISATION RANK TAYLOR HOBSON DIVISION]. Nov.12, 1963 [Nov.14, 1962], No.43079/62. Heading G2J. A zoom type objective comprising a front assembly which includes the relatively movable members A2, A3; and an iris diaphragm B located near the front of a normally stationary rear assembly A4 has mechanism B2 for operating the diaphragm B housed within a stationary tube B1 which also houses at least part of the rear assembly A4, the tube B1 having an external cam groove B7 for controlling the movement of the movable member A3. As shown the diaphragm B is operated by rotating control element B3 coupled by pin B5 to rotatable tube B2 which itself operates the diaphragm B in normal manner. On moving zoom control element E, bevel gearing E2, E3 rotates a pinion E1 meshing with gear teeth D3 on the outer surface of a drive tube D, so that tube D is rotated, and, since it has pin D2 and roller D1 engaging the cam groove B7, it is also moved longitudinally to adjust the axial position of member A3 carried by the drive tube D. The member A2 is carried by a mount G having three outwardly directed pins G1 angularly spaced at 120‹ intervals, each pin Gl having a pair of rollers G2, G3, engaging respectively a longitudinal slot such as D4 or D5 in tube D and an internal cam groove C3 in an outer stationary member, so that as tube D rotates, it causes pins G1 and thus mount G to rotate, and, due to the rollers G3 and cam grooves C3, the mount G and member A2 are moved longitudinally. To facilitate manufacture, grooves C3 are cut as cam slots right through the wall of an inner part C2 which is thereafter rigidly secured as a liner within an outer part C1. Mount J, carrying front member A1, has an external screwthread J1 co-operating with an internal screwthread H1 on a stationary outer tube H fixed to parts C1, C2, so that member A1 many be axially moved for focusing.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB43079/62A GB1066502A (en) | 1962-11-14 | 1962-11-14 | Improvements in or relating to optical objectives of variable equivalent focal length |
CH1396363A CH420659A (en) | 1962-11-14 | 1963-11-14 | Variable focal length optical lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB43079/62A GB1066502A (en) | 1962-11-14 | 1962-11-14 | Improvements in or relating to optical objectives of variable equivalent focal length |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1066502A true GB1066502A (en) | 1967-04-26 |
Family
ID=10427238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB43079/62A Expired GB1066502A (en) | 1962-11-14 | 1962-11-14 | Improvements in or relating to optical objectives of variable equivalent focal length |
Country Status (2)
Country | Link |
---|---|
CH (1) | CH420659A (en) |
GB (1) | GB1066502A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3591256A (en) * | 1968-04-15 | 1971-07-06 | Xerox Corp | Variable magnification lens system |
-
1962
- 1962-11-14 GB GB43079/62A patent/GB1066502A/en not_active Expired
-
1963
- 1963-11-14 CH CH1396363A patent/CH420659A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3591256A (en) * | 1968-04-15 | 1971-07-06 | Xerox Corp | Variable magnification lens system |
Also Published As
Publication number | Publication date |
---|---|
CH420659A (en) | 1966-09-15 |
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