JPS5939527A - Plastic lens - Google Patents

Plastic lens

Info

Publication number
JPS5939527A
JPS5939527A JP15020482A JP15020482A JPS5939527A JP S5939527 A JPS5939527 A JP S5939527A JP 15020482 A JP15020482 A JP 15020482A JP 15020482 A JP15020482 A JP 15020482A JP S5939527 A JPS5939527 A JP S5939527A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
lens
outside
effective diameter
edge part
core making
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
JP15020482A
Inventor
Soji Uchiumi
Original Assignee
Alps Electric 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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00Producing optical elements, e.g. lenses or prisms
    • B29D11/00932Combined cutting and grinding thereof

Abstract

PURPOSE:To provide the plastic lens for an optical instrument which is high in dimensional accuracy and free from any deformation of curved surfaces due to heat, by a method wherein the outside periphery of an annular edge part provided on the outside of an effective diameter of a lens and extending on both sides or one side of the lens in the direction of the optical axis of the lens is machined for core making work. CONSTITUTION:The annular edge part 13 extending on both sides or one side of a lens in the direction of the optical axis of the lens is provided while leaving a sufficient allowance 7 on the outside of the effective diameter 6 of the lens, and the outside periphery 8 of the edge part 13 is machined for core making to obtain the plastic lens 10. EFFECT:Since cutting heat at the time of machining for core making is generated at a part on the outside of the effective diameter 6 of the lens, thermal deformation of the curved surface within the range of the effective diameter 6 can be perfectly prevented. When combining a plurality of lenses, the spacing between the lenses can be maintained with high accuracy without using any other component part. Further, inclination of the lens can be reduced.
JP15020482A 1982-08-30 1982-08-30 Plastic lens Pending JPS5939527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15020482A JPS5939527A (en) 1982-08-30 1982-08-30 Plastic lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15020482A JPS5939527A (en) 1982-08-30 1982-08-30 Plastic lens

Publications (1)

Publication Number Publication Date
JPS5939527A true true JPS5939527A (en) 1984-03-03

Family

ID=15491795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15020482A Pending JPS5939527A (en) 1982-08-30 1982-08-30 Plastic lens

Country Status (1)

Country Link
JP (1) JPS5939527A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6114617A (en) * 1984-06-29 1986-01-22 Konishiroku Photo Ind Co Ltd Plastic lens
US5068126A (en) * 1988-03-04 1991-11-26 Sharp Kabushiki Kaisha Process for producing graphite electrodes
US5169508A (en) * 1988-03-04 1992-12-08 Sharp Kabushiki Kaisha Graphite electrode
JP2002200653A (en) * 2000-12-28 2002-07-16 Konica Corp Method for manufacturing optical element, and optical element
FR2835931A1 (en) * 2002-02-12 2003-08-15 Marc Delery Thermoplastic spectacle lens manufacturing procedure consists of injection molding between female and male components to form disc with peripheral web and crown

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56151902A (en) * 1980-04-25 1981-11-25 Konishiroku Photo Ind Co Ltd Plastic lens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56151902A (en) * 1980-04-25 1981-11-25 Konishiroku Photo Ind Co Ltd Plastic lens

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6114617A (en) * 1984-06-29 1986-01-22 Konishiroku Photo Ind Co Ltd Plastic lens
US5068126A (en) * 1988-03-04 1991-11-26 Sharp Kabushiki Kaisha Process for producing graphite electrodes
US5169508A (en) * 1988-03-04 1992-12-08 Sharp Kabushiki Kaisha Graphite electrode
JP2002200653A (en) * 2000-12-28 2002-07-16 Konica Corp Method for manufacturing optical element, and optical element
FR2835931A1 (en) * 2002-02-12 2003-08-15 Marc Delery Thermoplastic spectacle lens manufacturing procedure consists of injection molding between female and male components to form disc with peripheral web and crown

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