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FR2389144A1 - Piezoelectric variable focus optical lens - has index correction tank associated with variable curvature lens surface - Google Patents

Piezoelectric variable focus optical lens - has index correction tank associated with variable curvature lens surface

Info

Publication number
FR2389144A1
FR2389144A1 FR7712801A FR7712801A FR2389144A1 FR 2389144 A1 FR2389144 A1 FR 2389144A1 FR 7712801 A FR7712801 A FR 7712801A FR 7712801 A FR7712801 A FR 7712801A FR 2389144 A1 FR2389144 A1 FR 2389144A1
Authority
FR
France
Prior art keywords
variable
vessel
lens
optical lens
focus optical
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
FR7712801A
Other languages
French (fr)
Other versions
FR2389144B1 (en
Inventor
Guy Michelet
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.)
Quantel SA
Original Assignee
Quantel SA
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 Quantel SA filed Critical Quantel SA
Priority to FR7712801A priority Critical patent/FR2389144A1/en
Priority to US05/896,079 priority patent/US4289379A/en
Priority to GB15032/78A priority patent/GB1596895A/en
Priority to DE2817525A priority patent/DE2817525C2/en
Priority to JP4867678A priority patent/JPS53135347A/en
Publication of FR2389144A1 publication Critical patent/FR2389144A1/en
Application granted granted Critical
Publication of FR2389144B1 publication Critical patent/FR2389144B1/fr
Granted 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)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

The optical lens focal length is made variable by use of a piezoelectric element. The mechanism consists of a transparent vessel(3) which has all plane surfaces except one which is bound by the variable section of the lens. The vessel is filled with an index matching liquid or gelatinous material such as silicon oil. A small expansion volume(14) is provided at one side of the vessel. The non-plane side of the vessel is sealed to a transparent element(2) which is itself bonded to a two layer curved piezoelectric element(6, 7) which has a transparent lens section whose curvature varies as a function of an applied voltage(8, 9, 10).
FR7712801A 1977-04-27 1977-04-27 Piezoelectric variable focus optical lens - has index correction tank associated with variable curvature lens surface Granted FR2389144A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7712801A FR2389144A1 (en) 1977-04-27 1977-04-27 Piezoelectric variable focus optical lens - has index correction tank associated with variable curvature lens surface
US05/896,079 US4289379A (en) 1977-04-27 1978-04-13 Optical system having a variable focal length
GB15032/78A GB1596895A (en) 1977-04-27 1978-04-17 Optical system having a variable focal length
DE2817525A DE2817525C2 (en) 1977-04-27 1978-04-21 Optical system with adjustable focal length
JP4867678A JPS53135347A (en) 1977-04-27 1978-04-24 Focus changeable optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7712801A FR2389144A1 (en) 1977-04-27 1977-04-27 Piezoelectric variable focus optical lens - has index correction tank associated with variable curvature lens surface

Publications (2)

Publication Number Publication Date
FR2389144A1 true FR2389144A1 (en) 1978-11-24
FR2389144B1 FR2389144B1 (en) 1983-03-25

Family

ID=9190009

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7712801A Granted FR2389144A1 (en) 1977-04-27 1977-04-27 Piezoelectric variable focus optical lens - has index correction tank associated with variable curvature lens surface

Country Status (1)

Country Link
FR (1) FR2389144A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407567A (en) * 1978-05-05 1983-10-04 Quantel S.A. Objective having a variable focal length
US4989958A (en) * 1987-11-05 1991-02-05 Sanyo Electric Co., Ltd. Focus adjusting apparatus provided with a focus lens member formed of polymer gel substance having electro-reactive deformability
US5917657A (en) * 1996-02-22 1999-06-29 Denso Corp Imaging device having flexible liquid-filled film lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1327503A (en) * 1971-02-05 1973-08-22 Bosch Gmbh Robert Optical lenses
FR2321711A1 (en) * 1975-08-19 1977-03-18 Thomson Brandt OPTICAL DEVICE WITH AUTOMATIC FOCUS AND OPTICAL READER INCLUDING SUCH A DEVICE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1327503A (en) * 1971-02-05 1973-08-22 Bosch Gmbh Robert Optical lenses
FR2321711A1 (en) * 1975-08-19 1977-03-18 Thomson Brandt OPTICAL DEVICE WITH AUTOMATIC FOCUS AND OPTICAL READER INCLUDING SUCH A DEVICE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407567A (en) * 1978-05-05 1983-10-04 Quantel S.A. Objective having a variable focal length
US4989958A (en) * 1987-11-05 1991-02-05 Sanyo Electric Co., Ltd. Focus adjusting apparatus provided with a focus lens member formed of polymer gel substance having electro-reactive deformability
US5917657A (en) * 1996-02-22 1999-06-29 Denso Corp Imaging device having flexible liquid-filled film lens

Also Published As

Publication number Publication date
FR2389144B1 (en) 1983-03-25

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Legal Events

Date Code Title Description
ST Notification of lapse