JPS57201207A - Optical device with variable focal length - Google Patents

Optical device with variable focal length

Info

Publication number
JPS57201207A
JPS57201207A JP8664581A JP8664581A JPS57201207A JP S57201207 A JPS57201207 A JP S57201207A JP 8664581 A JP8664581 A JP 8664581A JP 8664581 A JP8664581 A JP 8664581A JP S57201207 A JPS57201207 A JP S57201207A
Authority
JP
Japan
Prior art keywords
lens
focal length
transparent
peripheral part
shaped material
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.)
Pending
Application number
JP8664581A
Other languages
Japanese (ja)
Inventor
Tsutomu Takano
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP8664581A priority Critical patent/JPS57201207A/en
Publication of JPS57201207A publication Critical patent/JPS57201207A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length

Landscapes

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

Abstract

PURPOSE:To realize easily a small-sized and inexpensive condenser lens capable of continuously varying magnifications by constituting in such a way that the peripheral part of a lens-shaped material, which is transparent and is formed with semisolid materials, is drawn to the outside. CONSTITUTION:A transparent liquid is packed in a bag consisting of materials obtained by making a silicone rubber transparent or transparent flexible materials to constitute a lens-shaped material 1, and plural slider weights 2 are attached to proper positions of the peripheral part of the material 1. When a rotary material 4 is rotated in a low speed through a motor 7 and a gear 8, the material 1 becomes a lens where the center is comparatively thick and the focal length is short. When the rotating material 4 is rotated in a high speed, the lens-shaped material 1 has the peripheral part drawn in the direction of the radius by slider weights and becomes a lens where the center is thin and the focal length is long. Consequently, a small-sized and inexpensive condenser lens capable of continuously varying magnifications is obtained easily.
JP8664581A 1981-06-05 1981-06-05 Optical device with variable focal length Pending JPS57201207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8664581A JPS57201207A (en) 1981-06-05 1981-06-05 Optical device with variable focal length

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8664581A JPS57201207A (en) 1981-06-05 1981-06-05 Optical device with variable focal length

Publications (1)

Publication Number Publication Date
JPS57201207A true JPS57201207A (en) 1982-12-09

Family

ID=13892760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8664581A Pending JPS57201207A (en) 1981-06-05 1981-06-05 Optical device with variable focal length

Country Status (1)

Country Link
JP (1) JPS57201207A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783153A (en) * 1985-12-24 1988-11-08 Canon Kabushiki Kaisha Variable-focus optical device
EP0914623A4 (en) * 1995-05-12 1999-05-12
CN108919515A (en) * 2018-09-11 2018-11-30 台州市太德光学有限公司 A kind of dynamic varifocal glasses

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783153A (en) * 1985-12-24 1988-11-08 Canon Kabushiki Kaisha Variable-focus optical device
EP0914623A4 (en) * 1995-05-12 1999-05-12
EP0914623A1 (en) * 1995-05-12 1999-05-12 Corp. Presby Variable focus lens by small changes of the equatorial lens diameter
US6038080A (en) * 1995-05-12 2000-03-14 Pc Lens Corp Variable focus lens by small changes of the equatorial lens diameter
US6930838B2 (en) 1995-05-12 2005-08-16 Pc Lens Corp. Variable focus lens by small changes of the equatorial lens diameter
CN108919515A (en) * 2018-09-11 2018-11-30 台州市太德光学有限公司 A kind of dynamic varifocal glasses

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