JPS5726802A - Forming and working method of pentagonal dach-prism - Google Patents

Forming and working method of pentagonal dach-prism

Info

Publication number
JPS5726802A
JPS5726802A JP10179580A JP10179580A JPS5726802A JP S5726802 A JPS5726802 A JP S5726802A JP 10179580 A JP10179580 A JP 10179580A JP 10179580 A JP10179580 A JP 10179580A JP S5726802 A JPS5726802 A JP S5726802A
Authority
JP
Japan
Prior art keywords
prism
forming
insert
mold
maximum area
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
JP10179580A
Other languages
English (en)
Inventor
Masamichi Miyazaki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP10179580A priority Critical patent/JPS5726802A/ja
Publication of JPS5726802A publication Critical patent/JPS5726802A/ja
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • 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
    • B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Viewfinders (AREA)
JP10179580A 1980-07-23 1980-07-23 Forming and working method of pentagonal dach-prism Pending JPS5726802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10179580A JPS5726802A (en) 1980-07-23 1980-07-23 Forming and working method of pentagonal dach-prism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10179580A JPS5726802A (en) 1980-07-23 1980-07-23 Forming and working method of pentagonal dach-prism

Publications (1)

Publication Number Publication Date
JPS5726802A true JPS5726802A (en) 1982-02-13

Family

ID=14310085

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10179580A Pending JPS5726802A (en) 1980-07-23 1980-07-23 Forming and working method of pentagonal dach-prism

Country Status (1)

Country Link
JP (1) JPS5726802A (ja)

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