JPS5419763A - Optical attenuator - Google Patents

Optical attenuator

Info

Publication number
JPS5419763A
JPS5419763A JP8483477A JP8483477A JPS5419763A JP S5419763 A JPS5419763 A JP S5419763A JP 8483477 A JP8483477 A JP 8483477A JP 8483477 A JP8483477 A JP 8483477A JP S5419763 A JPS5419763 A JP S5419763A
Authority
JP
Japan
Prior art keywords
optical attenuator
attenuation
comparing
apply
liquid crystal
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
JP8483477A
Other languages
Japanese (ja)
Inventor
Yoshihiro Uda
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8483477A priority Critical patent/JPS5419763A/en
Publication of JPS5419763A publication Critical patent/JPS5419763A/en
Pending legal-status Critical Current

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  • Control Of Non-Electrical Variables (AREA)

Abstract

PURPOSE: To stably obtain the desired attenuation by detecting the optical power before and after it passes through an optically attenuating liquid crystal and by comparing the detected output to apply the voltage corresponding to a preset attenuation.
COPYRIGHT: (C)1979,JPO&Japio
JP8483477A 1977-07-14 1977-07-14 Optical attenuator Pending JPS5419763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8483477A JPS5419763A (en) 1977-07-14 1977-07-14 Optical attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8483477A JPS5419763A (en) 1977-07-14 1977-07-14 Optical attenuator

Publications (1)

Publication Number Publication Date
JPS5419763A true JPS5419763A (en) 1979-02-14

Family

ID=13841802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8483477A Pending JPS5419763A (en) 1977-07-14 1977-07-14 Optical attenuator

Country Status (1)

Country Link
JP (1) JPS5419763A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142741A (en) * 1983-02-04 1984-08-16 Fuji Photo Film Co Ltd Magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142741A (en) * 1983-02-04 1984-08-16 Fuji Photo Film Co Ltd Magnetic recording medium
JPH0533446B2 (en) * 1983-02-04 1993-05-19 Fuji Photo Film Co Ltd

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