JPS57164726A - Information mark display device - Google Patents

Information mark display device

Info

Publication number
JPS57164726A
JPS57164726A JP5075181A JP5075181A JPS57164726A JP S57164726 A JPS57164726 A JP S57164726A JP 5075181 A JP5075181 A JP 5075181A JP 5075181 A JP5075181 A JP 5075181A JP S57164726 A JPS57164726 A JP S57164726A
Authority
JP
Japan
Prior art keywords
light
make
grating
marks
reference light
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.)
Granted
Application number
JP5075181A
Other languages
Japanese (ja)
Other versions
JPS6258494B2 (en
Inventor
Takashi Suzuki
Susumu Matsumura
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 JP5075181A priority Critical patent/JPS57164726A/en
Priority to US06/283,014 priority patent/US4374612A/en
Priority to DE19813129357 priority patent/DE3129357A1/en
Publication of JPS57164726A publication Critical patent/JPS57164726A/en
Publication of JPS6258494B2 publication Critical patent/JPS6258494B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light
    • G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Holo Graphy (AREA)

Abstract

PURPOSE:To make the displaying of information marks which are easy to make and do not give any adverse influence upon image information of a finder, etc., possible by displaying the hologram image by the N-order diffracted light of a relief diffraction grating. CONSTITUTION:A unit grating is constituted of two slopes 27, 28 of a transparent adhesive material 18 of a relief diffraction grating which forms a focal plate 8 together with a transparent base plate 15 provided with a split distance measuring part 16, a transparent member 19 for cover, etc. A dielectric reflection film is vapor-deposited according to marks on the surface 28 of acute in- clination. The illuminating light from a reference light source 9 transmits through the surface 27 and reflects on the surface 28 after this, then the hologram reconstructed light 24 of the mark by the diffracted light of N-th order is emitted in the direction of the observation eye in accordance with the equationI. It is possible to increase the pitch P of the grating and to display the information marks which are easy to make, and do not give any adverse influence upon image information of a finder, etc. by utilizing this N-order diffracted light. Here, theta: the incident angle of the reference light, lambda: the wavelength of the reference light.
JP5075181A 1980-07-25 1981-04-03 Information mark display device Granted JPS57164726A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP5075181A JPS57164726A (en) 1981-04-03 1981-04-03 Information mark display device
US06/283,014 US4374612A (en) 1980-07-25 1981-07-13 Mark indicating device for optical apparatus
DE19813129357 DE3129357A1 (en) 1980-07-25 1981-07-24 MARKING INDICATOR FOR AN OPTICAL DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5075181A JPS57164726A (en) 1981-04-03 1981-04-03 Information mark display device

Publications (2)

Publication Number Publication Date
JPS57164726A true JPS57164726A (en) 1982-10-09
JPS6258494B2 JPS6258494B2 (en) 1987-12-07

Family

ID=12867534

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5075181A Granted JPS57164726A (en) 1980-07-25 1981-04-03 Information mark display device

Country Status (1)

Country Link
JP (1) JPS57164726A (en)

Also Published As

Publication number Publication date
JPS6258494B2 (en) 1987-12-07

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