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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 length

Info

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
Application number
GB43079/62A
Inventor
Alan Chapman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rank Precision Industries Ltd
Original Assignee
Rank Precision Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rank Precision Industries Ltd filed Critical Rank Precision Industries Ltd
Priority to GB43079/62A priority Critical patent/GB1066502A/en
Priority to CH1396363A priority patent/CH420659A/en
Publication of GB1066502A publication Critical patent/GB1066502A/en
Expired legal-status Critical Current

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.
GB43079/62A 1962-11-14 1962-11-14 Improvements in or relating to optical objectives of variable equivalent focal length Expired GB1066502A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591256A (en) * 1968-04-15 1971-07-06 Xerox Corp Variable magnification lens system

Cited By (1)

* Cited by examiner, † Cited by third party
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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