JPS5652707A - Photo wavelength branching filter - Google Patents

Photo wavelength branching filter

Info

Publication number
JPS5652707A
JPS5652707A JP12874679A JP12874679A JPS5652707A JP S5652707 A JPS5652707 A JP S5652707A JP 12874679 A JP12874679 A JP 12874679A JP 12874679 A JP12874679 A JP 12874679A JP S5652707 A JPS5652707 A JP S5652707A
Authority
JP
Japan
Prior art keywords
face
angles
ray
incident
light
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
JP12874679A
Other languages
Japanese (ja)
Inventor
Akihiro Adachi
Yoshio Miyake
Toshio Takei
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 Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12874679A priority Critical patent/JPS5652707A/en
Publication of JPS5652707A publication Critical patent/JPS5652707A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve transmission characteristics of interference filtes and decrease the losses of transmitted light by combining prisms formed with multilayer interference filters on one face and enabling the reflected light to be taken out at a right angle to the incident light.
CONSTITUTION: In the case in which the angles of two angles out of three angles of a prism are defined as θ1, θ2 and the refractive index of prism material is defined as (n), a multila multilayer film interference filter is formed on the face sandwiched by the angles θ1 and θ2 of the prism 1 at which the angles θ1, θ2 and the refractive index (n) satisfy the relations shown by the formulas (1) and (2) and two pieces of the prisms 1 having been constituted in this way are combined to form a parallelogram and are so installed that the reflected light exit face 4 becomes parallel to the ray 21 incident from a fiber 11. The transmitted ray 22 of the light incident to the interference filter face 2 out of the ray 21 advances straightly linearly but the ray 23 reflected by the interference filter face 2 is totally reflected by the total refleting face 3 and emits in the direction perpendicular to the incident ray 21.
COPYRIGHT: (C)1981,JPO&Japio
JP12874679A 1979-10-05 1979-10-05 Photo wavelength branching filter Pending JPS5652707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12874679A JPS5652707A (en) 1979-10-05 1979-10-05 Photo wavelength branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12874679A JPS5652707A (en) 1979-10-05 1979-10-05 Photo wavelength branching filter

Publications (1)

Publication Number Publication Date
JPS5652707A true JPS5652707A (en) 1981-05-12

Family

ID=14992428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12874679A Pending JPS5652707A (en) 1979-10-05 1979-10-05 Photo wavelength branching filter

Country Status (1)

Country Link
JP (1) JPS5652707A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479439A2 (en) * 1990-09-29 1992-04-08 Pilkington P.E. Limited Optical display apparatus
JPH05273404A (en) * 1992-12-15 1993-10-22 Casio Comput Co Ltd Dichroic prism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479439A2 (en) * 1990-09-29 1992-04-08 Pilkington P.E. Limited Optical display apparatus
US5249081A (en) * 1990-09-29 1993-09-28 Pilkington P.E. Limited Optical apparatus for superimposing displayed visual information
JPH05273404A (en) * 1992-12-15 1993-10-22 Casio Comput Co Ltd Dichroic prism

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