JPS57139722A - Reflex zoom lens barrel - Google Patents

Reflex zoom lens barrel

Info

Publication number
JPS57139722A
JPS57139722A JP56025986A JP2598681A JPS57139722A JP S57139722 A JPS57139722 A JP S57139722A JP 56025986 A JP56025986 A JP 56025986A JP 2598681 A JP2598681 A JP 2598681A JP S57139722 A JPS57139722 A JP S57139722A
Authority
JP
Japan
Prior art keywords
pin
frame
ring
groove
zooming
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.)
Granted
Application number
JP56025986A
Other languages
Japanese (ja)
Other versions
JPH0419528B2 (en
Inventor
Shinsuke Kawamoto
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP56025986A priority Critical patent/JPS57139722A/en
Priority to DE3205313A priority patent/DE3205313C2/en
Priority to US06/349,514 priority patent/US4445756A/en
Publication of JPS57139722A publication Critical patent/JPS57139722A/en
Publication of JPH0419528B2 publication Critical patent/JPH0419528B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0896—Catadioptric systems with variable magnification or multiple imaging planes, including multispectral systems
    • 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
    • G02B15/142—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 two groups only
    • G02B15/1425—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 two groups only the first group being negative
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0804—Catadioptric systems using two curved mirrors
    • G02B17/0808—Catadioptric systems using two curved mirrors on-axis systems with at least one of the mirrors having a central aperture
    • 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
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Lens Barrels (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To obtain a reflex type zoom lens, by adding a mechanism which varies the relation between the front and rear frames to a reflex lens in which a mirror and a lens system are supported by the front and rear frames, respectively. CONSTITUTION:A mount part 2, a straight groove 3 and a rotary groove 4 are provided to a fixed barrel 1. A pin 8 on an outside helicoid ring 7 and a pin 6 on a zooming ring 5 are fitted to the above-mentioned grooves. A front frame 10 is attached to the ring 7 by means of a helocoid; and a rear frame 14 is attached to the ring 7 by fitting a pin 15 to a guide groove 16. The pin 15 is also fitted to a lead groove 17 on a zooming barrel. The zooming ring turns with the straight going of the front frame 10, and the position of the rear frame 14 is decided by the groove 17 and the pin 15. Thus the zooming is performed. With the turn of the frame 10, only the frame 10 goes straight to perform focusing.
JP56025986A 1981-02-24 1981-02-24 Reflex zoom lens barrel Granted JPS57139722A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP56025986A JPS57139722A (en) 1981-02-24 1981-02-24 Reflex zoom lens barrel
DE3205313A DE3205313C2 (en) 1981-02-24 1982-02-15 Camera lens
US06/349,514 US4445756A (en) 1981-02-24 1982-02-17 Reflex zoom lens barrel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56025986A JPS57139722A (en) 1981-02-24 1981-02-24 Reflex zoom lens barrel

Publications (2)

Publication Number Publication Date
JPS57139722A true JPS57139722A (en) 1982-08-28
JPH0419528B2 JPH0419528B2 (en) 1992-03-30

Family

ID=12181029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56025986A Granted JPS57139722A (en) 1981-02-24 1981-02-24 Reflex zoom lens barrel

Country Status (1)

Country Link
JP (1) JPS57139722A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021067861A (en) * 2019-10-25 2021-04-30 株式会社ニコン Imaging device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50151143A (en) * 1974-05-25 1975-12-04
JPS53142229A (en) * 1977-05-18 1978-12-11 Minolta Camera Co Ltd Lens mover in lens-barrel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50151143A (en) * 1974-05-25 1975-12-04
JPS53142229A (en) * 1977-05-18 1978-12-11 Minolta Camera Co Ltd Lens mover in lens-barrel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021067861A (en) * 2019-10-25 2021-04-30 株式会社ニコン Imaging device

Also Published As

Publication number Publication date
JPH0419528B2 (en) 1992-03-30

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