JPS6476026A - Optical display device - Google Patents

Optical display device

Info

Publication number
JPS6476026A
JPS6476026A JP23288287A JP23288287A JPS6476026A JP S6476026 A JPS6476026 A JP S6476026A JP 23288287 A JP23288287 A JP 23288287A JP 23288287 A JP23288287 A JP 23288287A JP S6476026 A JPS6476026 A JP S6476026A
Authority
JP
Japan
Prior art keywords
area
display
grating period
pattern
contrast
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
JP23288287A
Other languages
Japanese (ja)
Inventor
Akihiko Nagano
Etsuro Kishi
Masato Yamanobe
Takayuki Ishii
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 JP23288287A priority Critical patent/JPS6476026A/en
Publication of JPS6476026A publication Critical patent/JPS6476026A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Abstract

PURPOSE:To obtain an optical display device having high contrast and a high display quality by constituting a display pattern by a first area whose grating period is P1 and a second area whose grating period is P2 (P1<P2). CONSTITUTION:A display pattern is constituted of two areas whose grating periods are different, consisting of an (a) are whose grating period Pa is about 2mum and a (b) area whose grating period Pb is about 4mum and which satisfied a relation of Pa<Pb. As for the (a) area provided on the outside peripheral part of the pattern, its grating period is small, therefore, as for the display of this area, its contrast becomes higher, but due to the influence of a low-order diffracted light, the display quality drops to some extent. On the other hand, as for the (b) area of the inside of the pattern, its grating period is made larger than that of the area (a), therefore, the contrast of the display becomes lower to some extent, but a shift quantity of a virtual image generated by a partial low-order (+ or - primary) diffracted light and an image of an object to be photographed is small, and the display quality is improved. In such a way, the contrast becomes higher on an average as a whole, and the display quality is improved.
JP23288287A 1987-09-17 1987-09-17 Optical display device Pending JPS6476026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23288287A JPS6476026A (en) 1987-09-17 1987-09-17 Optical display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23288287A JPS6476026A (en) 1987-09-17 1987-09-17 Optical display device

Publications (1)

Publication Number Publication Date
JPS6476026A true JPS6476026A (en) 1989-03-22

Family

ID=16946317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23288287A Pending JPS6476026A (en) 1987-09-17 1987-09-17 Optical display device

Country Status (1)

Country Link
JP (1) JPS6476026A (en)

Similar Documents

Publication Publication Date Title
JPS5762052A (en) Original plate to be projected for use in transmission
FR2388270A1 (en) FLUORESCENCE POLARIMETER
ATE89670T1 (en) IMAGE PROJECTION SYSTEM.
JPS5624372A (en) Image recording method and its device
JPS6476026A (en) Optical display device
JPS52132851A (en) Optical detector of scanning type
JPS5642242A (en) Electrophotographic method
JPS5321944A (en) Displaying device
JPS53101933A (en) Picture-projector
JPS5387221A (en) Copier combined with transmitter
JPS5418759A (en) Optical scanner
JPS5293234A (en) Color separation optic for color television camera
JPS5380227A (en) Photographic attachment lens
SU121339A1 (en) The method of lighting in combined surveys with movable masking and a device for implementing the method
JPS5313921A (en) Image observation device
JPS6461727A (en) Display device
JPS5414746A (en) Illuninating light source device
JPS53146618A (en) Vehicle supervisory and photographic apparatus
GB2020985A (en) Audio-visual display system
JPS539551A (en) Scanning optical system having intermediate tone picture formic optical system
JPS566230A (en) Screen
JPS5436747A (en) Objective lens of microscope
JPS53138326A (en) Projector
JPS53100249A (en) Exposure optical system for multichromatic electrocopying machine
JPS5223214A (en) Color picture judging unit