JPS5652707A - Photo wavelength branching filter - Google Patents
Photo wavelength branching filterInfo
- 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
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
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)
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 |
-
1979
- 1979-10-05 JP JP12874679A patent/JPS5652707A/en active Pending
Cited By (3)
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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