GR990100395A - Variable spectacle lens - Google Patents

Variable spectacle lens

Info

Publication number
GR990100395A
GR990100395A GR990100395A GR990100395A GR990100395A GR 990100395 A GR990100395 A GR 990100395A GR 990100395 A GR990100395 A GR 990100395A GR 990100395 A GR990100395 A GR 990100395A GR 990100395 A GR990100395 A GR 990100395A
Authority
GR
Greece
Prior art keywords
membrane
perimeter
support member
free area
variable
Prior art date
Application number
GR990100395A
Other languages
Greek (el)
Inventor
Epstein Saul
Original Assignee
Kurtin Stephen
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 Kurtin Stephen filed Critical Kurtin Stephen
Publication of GR990100395A publication Critical patent/GR990100395A/en

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Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A liquid-filled variable focal length of the type which has a distensible membrane as one of the lens surfaces, and a membrane support member to support the perimeter of the free area of the membrane. By using a membrane support member having a toroidally shaped portion, the membrane, is supported such that it has a circular free area irrespective of the shape of the perimeter of the lens. The cross sectional shape of the toroidal portion, of the support member is preferable approximately an arc of a circle, and the perimeter of the free area of the membrane is maintened targent thereto.
GR990100395A 1999-11-16 1999-11-16 Variable spectacle lens GR990100395A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GR99100395 1999-11-16

Publications (1)

Publication Number Publication Date
GR990100395A true GR990100395A (en) 2001-07-31

Family

ID=10943972

Family Applications (1)

Application Number Title Priority Date Filing Date
GR990100395A GR990100395A (en) 1999-11-16 1999-11-16 Variable spectacle lens

Country Status (1)

Country Link
GR (1) GR990100395A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261655A (en) * 1978-01-09 1981-04-14 Honigsbaum Richard F Biomechanically focused eyeglasses
US5138494A (en) * 1990-05-07 1992-08-11 Stephen Kurtin Variable focal length lens
US5371629A (en) * 1993-02-04 1994-12-06 Kurtin; Stephen Non-circular variable focus lens
US5526067A (en) * 1994-12-21 1996-06-11 Polaroid Corporation Actuation mechanism for variable focal length eyeglasses
US5668620A (en) * 1994-04-12 1997-09-16 Kurtin; Stephen Variable focal length lenses which have an arbitrarily shaped periphery
US5956183A (en) * 1998-05-26 1999-09-21 Epstein; Saul Field-customizable variable focal length lens

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261655A (en) * 1978-01-09 1981-04-14 Honigsbaum Richard F Biomechanically focused eyeglasses
US5138494A (en) * 1990-05-07 1992-08-11 Stephen Kurtin Variable focal length lens
US5371629A (en) * 1993-02-04 1994-12-06 Kurtin; Stephen Non-circular variable focus lens
US5668620A (en) * 1994-04-12 1997-09-16 Kurtin; Stephen Variable focal length lenses which have an arbitrarily shaped periphery
US5526067A (en) * 1994-12-21 1996-06-11 Polaroid Corporation Actuation mechanism for variable focal length eyeglasses
US5956183A (en) * 1998-05-26 1999-09-21 Epstein; Saul Field-customizable variable focal length lens

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