JPS5749902A - Pentagonal dach-prism - Google Patents

Pentagonal dach-prism

Info

Publication number
JPS5749902A
JPS5749902A JP12550680A JP12550680A JPS5749902A JP S5749902 A JPS5749902 A JP S5749902A JP 12550680 A JP12550680 A JP 12550680A JP 12550680 A JP12550680 A JP 12550680A JP S5749902 A JPS5749902 A JP S5749902A
Authority
JP
Japan
Prior art keywords
prism
vertexes
pentagonal dach
dach
pentagonal
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
JP12550680A
Other languages
Japanese (ja)
Inventor
Kikuo Momiyama
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP12550680A priority Critical patent/JPS5749902A/en
Publication of JPS5749902A publication Critical patent/JPS5749902A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Viewfinders (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

PURPOSE:To facilitate and to reduce cost by combining a simple triangular prism as the 1st prism and another simple triangular prism as the 2nd prism in one body. CONSTITUTION:A pentagonal Dach-prism 4 is cut with a plane including vertexes 41, 45, 46, and 44 and separated into an upper and a lower part as the 1st prism and 2nd prism respectively. The vertexes 41', 44', 45', and 46' of the 1st prism 5 are the same as the vertexes 41, 44, 45, and 46 of the 2nd prism 6 before cutting. Here, the 1st prism 5 and 2nd prism 6 are manufactured separately and independently and those two prisms are combined to obtain one pentagonal Dach-prism. The 1st prism 5 and 2nd prism 6 are both manufactured easily by cutting a triangular prism properly. Thus, the manufacture is simplified and the cost is reduced.
JP12550680A 1980-09-10 1980-09-10 Pentagonal dach-prism Pending JPS5749902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12550680A JPS5749902A (en) 1980-09-10 1980-09-10 Pentagonal dach-prism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12550680A JPS5749902A (en) 1980-09-10 1980-09-10 Pentagonal dach-prism

Publications (1)

Publication Number Publication Date
JPS5749902A true JPS5749902A (en) 1982-03-24

Family

ID=14911802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12550680A Pending JPS5749902A (en) 1980-09-10 1980-09-10 Pentagonal dach-prism

Country Status (1)

Country Link
JP (1) JPS5749902A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159994A (en) * 1984-01-03 1985-08-21 アタラ・コーポレーヨン Currency distributor and operation of currency unit
JPH0376635A (en) * 1989-08-21 1991-04-02 Osaka Sealing Insatsu Kk Preparation of label continuum
JPH0376637A (en) * 1989-08-21 1991-04-02 Osaka Sealing Insatsu Kk Preparation of label continuum
JPH0376634A (en) * 1989-08-21 1991-04-02 Osaka Sealing Insatsu Kk Preparation of label continuum
JPH0522275U (en) * 1991-09-06 1993-03-23 日産デイーゼル工業株式会社 Cab forward movement prevention device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159994A (en) * 1984-01-03 1985-08-21 アタラ・コーポレーヨン Currency distributor and operation of currency unit
JPH0376635A (en) * 1989-08-21 1991-04-02 Osaka Sealing Insatsu Kk Preparation of label continuum
JPH0376637A (en) * 1989-08-21 1991-04-02 Osaka Sealing Insatsu Kk Preparation of label continuum
JPH0376634A (en) * 1989-08-21 1991-04-02 Osaka Sealing Insatsu Kk Preparation of label continuum
JPH0522275U (en) * 1991-09-06 1993-03-23 日産デイーゼル工業株式会社 Cab forward movement prevention device

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