JPS5782802A - Dichroic mirror to prevent ripple - Google Patents
Dichroic mirror to prevent rippleInfo
- Publication number
- JPS5782802A JPS5782802A JP13715781A JP13715781A JPS5782802A JP S5782802 A JPS5782802 A JP S5782802A JP 13715781 A JP13715781 A JP 13715781A JP 13715781 A JP13715781 A JP 13715781A JP S5782802 A JPS5782802 A JP S5782802A
- Authority
- JP
- Japan
- Prior art keywords
- dichroic mirror
- lambda
- optical film
- layer
- thickness
- 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
- 239000012788 optical film Substances 0.000 abstract 4
- 239000000463 material Substances 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 239000000758 substrate Substances 0.000 abstract 2
- 238000000151 deposition Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/285—Interference filters comprising deposited thin solid films
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
- G02B5/0825—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
- Optical Filters (AREA)
Abstract
PURPOSE:To increase the optical characteristics that prevents the ripple at the long wavelength side of a visible wavelength region, by increasing the thickness of the optical film on the final layer of a dichroic mirror formed by laminating altenately the materials of high and low refractive indexes more than other layers. CONSTITUTION:A dichroic mirror is formed by vacuum depositing a materials H and L having high and low refractive indexes alternately on a substrate 3 made of a glass plate, a prism, etc. The final layer of such dichroic mirror is brought into contact with the air. The thickness of the optical film of the 1st layer counted from the substrate 3 is set smaller than lambda/4, where lambda is the designed wavelength. The optical film thickness of the 2nd layer is also regulated to smaller than lambda/4. The optical film thickness of the final layer is regulated to larger than lambda/4. In such way, the ripple can be satisfactorily eliminated at the long wavelength side of a visible range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13715781A JPS5782802A (en) | 1981-08-31 | 1981-08-31 | Dichroic mirror to prevent ripple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13715781A JPS5782802A (en) | 1981-08-31 | 1981-08-31 | Dichroic mirror to prevent ripple |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1813973A Division JPS5710402B2 (en) | 1973-02-14 | 1973-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5782802A true JPS5782802A (en) | 1982-05-24 |
Family
ID=15192147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13715781A Pending JPS5782802A (en) | 1981-08-31 | 1981-08-31 | Dichroic mirror to prevent ripple |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5782802A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60192904A (en) * | 1984-03-14 | 1985-10-01 | Fujitsu Ltd | Multi-layered dielectric film structure of optical device |
-
1981
- 1981-08-31 JP JP13715781A patent/JPS5782802A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60192904A (en) * | 1984-03-14 | 1985-10-01 | Fujitsu Ltd | Multi-layered dielectric film structure of optical device |
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