JPS5799613A - Progressive multifocus lens - Google Patents

Progressive multifocus lens

Info

Publication number
JPS5799613A
JPS5799613A JP17560180A JP17560180A JPS5799613A JP S5799613 A JPS5799613 A JP S5799613A JP 17560180 A JP17560180 A JP 17560180A JP 17560180 A JP17560180 A JP 17560180A JP S5799613 A JPS5799613 A JP S5799613A
Authority
JP
Japan
Prior art keywords
main meridian
distance
meridian circle
long
lens
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
JP17560180A
Other languages
Japanese (ja)
Other versions
JPS6338688B2 (en
Inventor
Shunei Shinohara
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP17560180A priority Critical patent/JPS5799613A/en
Priority to FR8122267A priority patent/FR2495789B1/en
Priority to US06/327,288 priority patent/US4580883A/en
Priority to GB8136441A priority patent/GB2090426B/en
Priority to DE3147952A priority patent/DE3147952C2/en
Publication of JPS5799613A publication Critical patent/JPS5799613A/en
Priority to SG531/86A priority patent/SG53186G/en
Priority to HK737/86A priority patent/HK73786A/en
Publication of JPS6338688B2 publication Critical patent/JPS6338688B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power
    • G02C7/063—Shape of the progressive surface
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

PURPOSE:To reduce the distortion of an image by equalizing the curvature of a sectional curve, which is a line of intersection between a plane crossing a main meridian circle at right angles and the refraction surface of a lens, to that of the main meridian circle in a long-distance part area from the main meridian circle to a minimum distance of 25mm.. CONSTITUTION:Curves C1 and C2 dividing the refraction surface of a lens into three run one a long-distance center A and a short-distance center B at an intersection with a main meridian circle M. Thus, a long-distance part area 51, a short-distance part area 52, and an intermediate-distance part area 53 are obtained. When intersections between a sectional curve M1 by a plane parallel to the main meridian circle M and the curves C1 and C2 are denoted as A1 and A2, an angle between the normal line of the lens refraction surface and the main meridian circle at each point on the sectional curve M1 is shown by a shown cross figure, and in an oblique projection, angles between normal lines T1, T2 and T3 at points P1, P2, and P3 in the long, short and intermediate distance areas on the sectional curve M1, and the main meridian circle are shown by K1, K2 and K3.
JP17560180A 1980-12-05 1980-12-12 Progressive multifocus lens Granted JPS5799613A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP17560180A JPS5799613A (en) 1980-12-12 1980-12-12 Progressive multifocus lens
FR8122267A FR2495789B1 (en) 1980-12-05 1981-11-27 PROGRESSIVE MULTIFOCAL LENS
US06/327,288 US4580883A (en) 1980-12-05 1981-12-03 Progressive multifocal ophthalmic lenses
GB8136441A GB2090426B (en) 1980-12-05 1981-12-03 Progressive power ophthalmic lenses
DE3147952A DE3147952C2 (en) 1980-12-05 1981-12-03 Multifocal lens
SG531/86A SG53186G (en) 1980-12-05 1986-06-12 Ophthalmic lenses
HK737/86A HK73786A (en) 1980-12-05 1986-10-02 Ophthalmic lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17560180A JPS5799613A (en) 1980-12-12 1980-12-12 Progressive multifocus lens

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP8840582A Division JPS5824115A (en) 1982-05-25 1982-05-25 Progressive multifocus lens
JP8840682A Division JPS5824116A (en) 1982-05-25 1982-05-25 Progressive multifocus lens

Publications (2)

Publication Number Publication Date
JPS5799613A true JPS5799613A (en) 1982-06-21
JPS6338688B2 JPS6338688B2 (en) 1988-08-01

Family

ID=15998936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17560180A Granted JPS5799613A (en) 1980-12-05 1980-12-12 Progressive multifocus lens

Country Status (1)

Country Link
JP (1) JPS5799613A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5988718A (en) * 1982-11-12 1984-05-22 Hoya Corp Progressive focusing spectacle lens considering vergence of eye
JPS59189314A (en) * 1983-04-12 1984-10-26 Hoya Corp Progressive multiple focus lens having negative surface refracting power at circumferential part

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02173382A (en) * 1988-12-23 1990-07-04 Matsushita Refrig Co Ltd Refrigerant pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS493595A (en) * 1972-04-21 1974-01-12
JPS5046348A (en) * 1973-08-16 1975-04-25
JPS5511285A (en) * 1978-05-12 1980-01-26 Essilor Int Finishing lens refractive surface

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS493595A (en) * 1972-04-21 1974-01-12
JPS5046348A (en) * 1973-08-16 1975-04-25
JPS5511285A (en) * 1978-05-12 1980-01-26 Essilor Int Finishing lens refractive surface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5988718A (en) * 1982-11-12 1984-05-22 Hoya Corp Progressive focusing spectacle lens considering vergence of eye
JPS6247284B2 (en) * 1982-11-12 1987-10-07 Hoya Corp
JPS59189314A (en) * 1983-04-12 1984-10-26 Hoya Corp Progressive multiple focus lens having negative surface refracting power at circumferential part

Also Published As

Publication number Publication date
JPS6338688B2 (en) 1988-08-01

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