Multilayer film structure
First Claim
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1. A multilayer film structure comprising:
- at least two light absorption layers; and
at least two transparent layers;
said absorption layers including at least one kind of metal, wherein a spectral phase difference between light transmitted through said multilayer film structure and light transmitted through other portion excluding said multilayer film structure is approximately 90°
in the whole range of wavelength of visible light.
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Abstract
A multilayer film structure includes a light absorption layer and a transparent layer so that a phase in the light absorption layer and a phase in the transparent layer have substantially constant values, irrespective of wavelengths of light transmitted through both the layers.
18 Citations
15 Claims
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1. A multilayer film structure comprising:
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at least two light absorption layers; and at least two transparent layers; said absorption layers including at least one kind of metal, wherein a spectral phase difference between light transmitted through said multilayer film structure and light transmitted through other portion excluding said multilayer film structure is approximately 90°
in the whole range of wavelength of visible light. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10)
- 9. A multilayer film structure according to claim 1 or 2, wherein a refractive index of each of said transparent layers satisfies a condition
- space="preserve" listing-type="equation">1.3<
n<
1.5
where n is the refractive index of each of said transparent layers. - space="preserve" listing-type="equation">1.3<
-
-
10. A multilayer film structure according to claim 9, wherein each of said transparent layers includes one of MgF2, SiO2, and Na3 AlF6.
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3. A multilayer film structure comprising;
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at least two light absorption layers; and at least two transparent layers; said absorption layers including at least one kind of metal, wherein a spectral phase difference between light transmitted through said multilayer film structure and light transmitted through other portion excluding said multilayer film structure is approximately 0°
in the whole range of wavelength of visible light. - View Dependent Claims (11, 12, 13, 14, 15)
- 14. A multilayer film structure according to claim 3, wherein a refractive index of each of said transparent layers satisfies a condition
- space="preserve" listing-type="equation">1.3<
n<
1.5
where n is the refractive index of each of said transparent layers. - space="preserve" listing-type="equation">1.3<
-
-
15. A multilayer film structure according to claim 14, wherein each of said transparent layers includes one of MgF2, SiO2, and Na3 AlF6.
Specification