JPS574736A - Manufacture of large-sized fresnel lens - Google Patents

Manufacture of large-sized fresnel lens

Info

Publication number
JPS574736A
JPS574736A JP7945280A JP7945280A JPS574736A JP S574736 A JPS574736 A JP S574736A JP 7945280 A JP7945280 A JP 7945280A JP 7945280 A JP7945280 A JP 7945280A JP S574736 A JPS574736 A JP S574736A
Authority
JP
Japan
Prior art keywords
organic glass
fresnel lens
mold
complementary
sized
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
JP7945280A
Other languages
Japanese (ja)
Inventor
Masao Horiguchi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP7945280A priority Critical patent/JPS574736A/en
Publication of JPS574736A publication Critical patent/JPS574736A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00269—Fresnel lenses

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To readily produce a large-sized Fresnel lens having a generally flat shape using a simple apparatus, by introducing an organic glass into a mold having the upper side open and having a surface complementary to the surface including curvatures of the lens to be produced, and polymerizing the organic glass. CONSTITUTION:The mold 2 formed by joining mold blocks 2', 2'', 2''',... and having a surface complementary to the surface having curvatures of a Fresnel lens is placed horizontally on a bottom of a molding vessel 1 with the complementary open surface of the mold 2 upside, and the melted organic glass (for example a polymethacrylic acid methyl) 7 in a tank 3 is introduced through a pipe 4 into the molding vessel 1. Then after the surface of the introduced organic glass become still, ultraviolet rays are irradiated from light sources 5 mounted in a light source frame 6 to cure the organic glass 7 to form the large-sized Fresnel lens.
JP7945280A 1980-06-12 1980-06-12 Manufacture of large-sized fresnel lens Pending JPS574736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7945280A JPS574736A (en) 1980-06-12 1980-06-12 Manufacture of large-sized fresnel lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7945280A JPS574736A (en) 1980-06-12 1980-06-12 Manufacture of large-sized fresnel lens

Publications (1)

Publication Number Publication Date
JPS574736A true JPS574736A (en) 1982-01-11

Family

ID=13690265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7945280A Pending JPS574736A (en) 1980-06-12 1980-06-12 Manufacture of large-sized fresnel lens

Country Status (1)

Country Link
JP (1) JPS574736A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7785092B2 (en) * 2005-08-09 2010-08-31 Coopervision International Holding Company, Lp Systems and methods for producing contact lenses from a polymerizable composition
CN105818405A (en) * 2016-04-20 2016-08-03 北京羽扇智信息科技有限公司 Method for forming lens on shell of wearable equipment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829536A (en) * 1971-04-05 1974-08-13 Humphrey Res Ass Method of forming an optical element of reduced thickness

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829536A (en) * 1971-04-05 1974-08-13 Humphrey Res Ass Method of forming an optical element of reduced thickness

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7785092B2 (en) * 2005-08-09 2010-08-31 Coopervision International Holding Company, Lp Systems and methods for producing contact lenses from a polymerizable composition
US8298458B2 (en) 2005-08-09 2012-10-30 Coopervision International Holding Company, Lp Systems and methods for producing silicone hydrogel contact lenses from a polymerizable composition
US8308999B2 (en) 2005-08-09 2012-11-13 Coopervision International Holding Company, Lp Systems and methods for producing contact lenses from a polymerizable composition
CN105818405A (en) * 2016-04-20 2016-08-03 北京羽扇智信息科技有限公司 Method for forming lens on shell of wearable equipment
CN105818405B (en) * 2016-04-20 2019-02-22 北京羽扇智信息科技有限公司 A method of forming lens on the shell of wearable device

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