JPS55105205A - Reflecting mirror and its production - Google Patents

Reflecting mirror and its production

Info

Publication number
JPS55105205A
JPS55105205A JP1293979A JP1293979A JPS55105205A JP S55105205 A JPS55105205 A JP S55105205A JP 1293979 A JP1293979 A JP 1293979A JP 1293979 A JP1293979 A JP 1293979A JP S55105205 A JPS55105205 A JP S55105205A
Authority
JP
Japan
Prior art keywords
reflecting
mirror
semitransmitting
reflecting mirror
mask
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
JP1293979A
Other languages
Japanese (ja)
Inventor
Tokusaburo Kakiuchi
Hirobumi Horigome
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 JP1293979A priority Critical patent/JPS55105205A/en
Publication of JPS55105205A publication Critical patent/JPS55105205A/en
Pending legal-status Critical Current

Links

Landscapes

  • Viewfinders (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Cameras In General (AREA)

Abstract

PURPOSE: To obtain the reflecting mirror in which part of the toral reflecting surface is made into a semitranmitting part with simple work by letting minute areas of reflecting surfaces and transmitting surfaces intersperse in the center of the total reflecting surface of the reflecting mirror by the use of the specified method which utilizes a mask.
CONSTITUTION: Light from an optical system 2 is reflected by a reflecting mirror 1 and enters a finder 3. Part threof transmits through the mirror and enters a photo detector 4. A semitransmitting part 6 consisting of multiple fully transmitting surfaces 7 and totally reflecting surfaces 8 having minute areas of grating form is provided in the center of the totally reflecting part 5 of the mirror 1. This semitransmitting part 6 is formed by evaporating total reflecting material thereon in the state wherein the mask comprising blanking multiple minute area portions corresponding to the total reflecting surface is put on and removing the mask after this. Thereby, the reflecting mirror 1 having the semitransmitting part 6 may be obtained by the simple work. Accurate focusing and detection of measuring light may be accomplished with sufficient quantity of light passing through the semitransmitting part 6.
COPYRIGHT: (C)1980,JPO&Japio
JP1293979A 1979-02-07 1979-02-07 Reflecting mirror and its production Pending JPS55105205A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1293979A JPS55105205A (en) 1979-02-07 1979-02-07 Reflecting mirror and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1293979A JPS55105205A (en) 1979-02-07 1979-02-07 Reflecting mirror and its production

Publications (1)

Publication Number Publication Date
JPS55105205A true JPS55105205A (en) 1980-08-12

Family

ID=11819246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1293979A Pending JPS55105205A (en) 1979-02-07 1979-02-07 Reflecting mirror and its production

Country Status (1)

Country Link
JP (1) JPS55105205A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335421A (en) * 1980-03-17 1982-06-15 Modia Joseph W Light fixture, light aperture and method of uniformly illuminating an optically diffusive viewing area

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5279944A (en) * 1975-12-26 1977-07-05 Anritsu Electric Co Ltd Half mirror

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5279944A (en) * 1975-12-26 1977-07-05 Anritsu Electric Co Ltd Half mirror

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335421A (en) * 1980-03-17 1982-06-15 Modia Joseph W Light fixture, light aperture and method of uniformly illuminating an optically diffusive viewing area

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