JPS6456402A - Brightness adjusting member - Google Patents

Brightness adjusting member

Info

Publication number
JPS6456402A
JPS6456402A JP21379887A JP21379887A JPS6456402A JP S6456402 A JPS6456402 A JP S6456402A JP 21379887 A JP21379887 A JP 21379887A JP 21379887 A JP21379887 A JP 21379887A JP S6456402 A JPS6456402 A JP S6456402A
Authority
JP
Japan
Prior art keywords
area density
distribution
fine patterns
dotty
expressed
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
JP21379887A
Other languages
Japanese (ja)
Inventor
Yasuhiro Kaneko
Masatoshi Takei
Tokihiko Masuzawa
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.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon 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 Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Priority to JP21379887A priority Critical patent/JPS6456402A/en
Publication of JPS6456402A publication Critical patent/JPS6456402A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Elements Other Than Lenses (AREA)

Abstract

PURPOSE:To provide a surface light source which is of a thin type and has a uniform brightness distribution by forming grating-shaped or dotty light reflective fine patterns having an area density distribution on the surface of a light transmissive film or sheet material in such a manner that said patterns are expressed by the specific area density function. CONSTITUTION:The grating-shaped or dotty light reflective fine patterns having the area density distribution are formed on the surface of the light transmissive film or sheet material. The fine patterns are formed in such a manner that the area density function Ra(X) is expressed by Ra(X)=A exp(-X<m>/2.S<m>) (where 0.5<A<0.9, 1.3<m<2.5, S is a positive real number) when an X-Y coordinate system is so determined that the direction of the invariable density distribution is the Y-axis. The approximately uniform brightness distribution is thereby obtd.
JP21379887A 1987-08-27 1987-08-27 Brightness adjusting member Pending JPS6456402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21379887A JPS6456402A (en) 1987-08-27 1987-08-27 Brightness adjusting member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21379887A JPS6456402A (en) 1987-08-27 1987-08-27 Brightness adjusting member

Publications (1)

Publication Number Publication Date
JPS6456402A true JPS6456402A (en) 1989-03-03

Family

ID=16645222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21379887A Pending JPS6456402A (en) 1987-08-27 1987-08-27 Brightness adjusting member

Country Status (1)

Country Link
JP (1) JPS6456402A (en)

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