JPS5782802A - Dichroic mirror to prevent ripple - Google Patents

Dichroic mirror to prevent ripple

Info

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
Application number
JP13715781A
Other languages
Japanese (ja)
Inventor
Nobuyuki Sekimura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP13715781A priority Critical patent/JPS5782802A/en
Publication of JPS5782802A publication Critical patent/JPS5782802A/en
Pending legal-status Critical Current

Links

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

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.
JP13715781A 1981-08-31 1981-08-31 Dichroic mirror to prevent ripple Pending JPS5782802A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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