JPS5541415A - Semi-transparent mirror - Google Patents
Semi-transparent mirrorInfo
- Publication number
- JPS5541415A JPS5541415A JP11415478A JP11415478A JPS5541415A JP S5541415 A JPS5541415 A JP S5541415A JP 11415478 A JP11415478 A JP 11415478A JP 11415478 A JP11415478 A JP 11415478A JP S5541415 A JPS5541415 A JP S5541415A
- Authority
- JP
- Japan
- Prior art keywords
- prism
- refractive index
- dielectric thin
- thin film
- semi
- 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
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Viewfinders (AREA)
Abstract
PURPOSE: To obtain the semi-transparent mirror which is reduced of absorption of rays by thin films and is constituted as a prism type beam splitter of good efficiency by evaporating Al thin film and the specific dielectric thin films in order to make reflected light more than transmitted light.
CONSTITUTION: A semi-transparent film 1 which is disposed with an inclination to the optical axis of incident rays is sandwiched by a prism A through which reflected light R passes and a prism B through which transmitted light T passes. Here, the filmIis constituted by a dielectric thin filmIof a refractive index H higher than the refractive index of the prism A, a dielectric thin filmIIof a refractive index L lower than the refractive index of the prism A, an Al thin film Al, a dielectric thin film III of a refractive index H and a dielectric thin film IV of a refractive index L from the prism A side and the thicknesses of the thin filmsIthru IV are made 0.27W0.4λ with respect to the reference wavelength A of indicent rays per layer.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11415478A JPS5541415A (en) | 1978-09-19 | 1978-09-19 | Semi-transparent mirror |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11415478A JPS5541415A (en) | 1978-09-19 | 1978-09-19 | Semi-transparent mirror |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5541415A true JPS5541415A (en) | 1980-03-24 |
Family
ID=14630494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11415478A Pending JPS5541415A (en) | 1978-09-19 | 1978-09-19 | Semi-transparent mirror |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5541415A (en) |
-
1978
- 1978-09-19 JP JP11415478A patent/JPS5541415A/en active Pending
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