JPS6473326A - Light signal modulating medium - Google Patents

Light signal modulating medium

Info

Publication number
JPS6473326A
JPS6473326A JP22844187A JP22844187A JPS6473326A JP S6473326 A JPS6473326 A JP S6473326A JP 22844187 A JP22844187 A JP 22844187A JP 22844187 A JP22844187 A JP 22844187A JP S6473326 A JPS6473326 A JP S6473326A
Authority
JP
Japan
Prior art keywords
state
light
lambdam
medium
absorption spectrum
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
JP22844187A
Other languages
Japanese (ja)
Inventor
Toshihiro Nishi
Koichi Arishima
Hisao Tabei
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP22844187A priority Critical patent/JPS6473326A/en
Publication of JPS6473326A publication Critical patent/JPS6473326A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Abstract

PURPOSE:To obtain the light signal modulating medium which operates at an extremely fast speed by utilizing the fact that an optically excited electron migration material changes in state extremely fast and the absorption spectrum of the excitation state is greatly different from the absorption spectrum in the ground state. CONSTITUTION:This is one of optical modulating methods which utilize the difference in absorption spectrum between the ground state and excitation state of molecules; and the absorption intensity increases from the excitation state as optical modulated light LM with wavelength lambdam is projected to increase the refractive index of the medium, and the optical path from the direction of transmitted signal light Ls1 to a reflected signal Ls2 is deflected. When the wavelength lambdas of incident signal light is so selected that the refractive index to the lambdas decreases nearby the absorption lambdam from the ground state as the irradiation intensity of the lambdam decreases, the medium changes from a total reflection state to a transmission state as the modulated light is projected, and the optical path of the signal light is deflected.
JP22844187A 1987-09-14 1987-09-14 Light signal modulating medium Pending JPS6473326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22844187A JPS6473326A (en) 1987-09-14 1987-09-14 Light signal modulating medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22844187A JPS6473326A (en) 1987-09-14 1987-09-14 Light signal modulating medium

Publications (1)

Publication Number Publication Date
JPS6473326A true JPS6473326A (en) 1989-03-17

Family

ID=16876542

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22844187A Pending JPS6473326A (en) 1987-09-14 1987-09-14 Light signal modulating medium

Country Status (1)

Country Link
JP (1) JPS6473326A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6265708B1 (en) 1996-02-14 2001-07-24 Dainichiseika Color & Chemicals Mfg. Co., Ltd. Method and apparatus for controlling photointensity and/or luminous flux density of a signal light
US6452710B1 (en) 1997-08-08 2002-09-17 National Institute Of Advanced Industrial Science And Technology Optical element, optical control method and device using this optical element, and method of manufacturing optical element
JP2007075776A (en) * 2005-09-16 2007-03-29 Amano Corp Dust disposal device for dust collector and its disposal method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6265708B1 (en) 1996-02-14 2001-07-24 Dainichiseika Color & Chemicals Mfg. Co., Ltd. Method and apparatus for controlling photointensity and/or luminous flux density of a signal light
US6452710B1 (en) 1997-08-08 2002-09-17 National Institute Of Advanced Industrial Science And Technology Optical element, optical control method and device using this optical element, and method of manufacturing optical element
JP2007075776A (en) * 2005-09-16 2007-03-29 Amano Corp Dust disposal device for dust collector and its disposal method

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