JPS5449153A - Light attenuator - Google Patents

Light attenuator

Info

Publication number
JPS5449153A
JPS5449153A JP11576677A JP11576677A JPS5449153A JP S5449153 A JPS5449153 A JP S5449153A JP 11576677 A JP11576677 A JP 11576677A JP 11576677 A JP11576677 A JP 11576677A JP S5449153 A JPS5449153 A JP S5449153A
Authority
JP
Japan
Prior art keywords
light
incident light
incident
attenuation
optical axis
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
JP11576677A
Other languages
Japanese (ja)
Other versions
JPS6029930B2 (en
Inventor
Fumio Mita
Shoichi Kurita
Keiji Tanaka
Seiji Terai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP52115766A priority Critical patent/JPS6029930B2/en
Publication of JPS5449153A publication Critical patent/JPS5449153A/en
Publication of JPS6029930B2 publication Critical patent/JPS6029930B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Optical Filters (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

PURPOSE: To prevent backward incidence of reflected light to the incident light side and eliminate optical axis deviation of incident light and transmitted light by turning back the transmitted light of the attenuation plate provided with an inclination to the incident light in parallel with the incident light to the incident ligh side and letting the same again transmit through the attenuation plate.
CONSTITUTION: The attenuation plate consisting of a glass plate 1 and a metal vapor-deposition film 2 is inclined at an angle θ to incident light P1. The optical axis of the incident light P1 deviates after said light transmits through the glass plate 1, but its optical path is turned back at a rectangular prism 3 and when it enters the glass plate 1 again, the optical axis is again returned to the original incident angle position. At this time, the light passes through the attenuation plate twice and therefore the twofold quantity of attenuation may be obtained
COPYRIGHT: (C)1979,JPO&Japio
JP52115766A 1977-09-27 1977-09-27 optical attenuator Expired JPS6029930B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52115766A JPS6029930B2 (en) 1977-09-27 1977-09-27 optical attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52115766A JPS6029930B2 (en) 1977-09-27 1977-09-27 optical attenuator

Publications (2)

Publication Number Publication Date
JPS5449153A true JPS5449153A (en) 1979-04-18
JPS6029930B2 JPS6029930B2 (en) 1985-07-13

Family

ID=14670510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52115766A Expired JPS6029930B2 (en) 1977-09-27 1977-09-27 optical attenuator

Country Status (1)

Country Link
JP (1) JPS6029930B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58176617A (en) * 1982-02-24 1983-10-17 プリシジヨン・グラインデイング・リミテツド Apparatus for adjusting optical image position
JPS6411224A (en) * 1987-07-03 1989-01-13 Rikagaku Kenkyusho Optical axis moving mechanism for optical system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4811308U (en) * 1971-06-18 1973-02-08
JPS50106653A (en) * 1973-11-12 1975-08-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4811308U (en) * 1971-06-18 1973-02-08
JPS50106653A (en) * 1973-11-12 1975-08-22

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58176617A (en) * 1982-02-24 1983-10-17 プリシジヨン・グラインデイング・リミテツド Apparatus for adjusting optical image position
JPS6255767B2 (en) * 1982-02-24 1987-11-20 Pureshijon Guraindeingu Ltd
JPS6411224A (en) * 1987-07-03 1989-01-13 Rikagaku Kenkyusho Optical axis moving mechanism for optical system

Also Published As

Publication number Publication date
JPS6029930B2 (en) 1985-07-13

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