US4965152A
Expired / Lapsed
US
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Holographic notch filters
Assignee: EIDP Inc
•
Filing: 1989-07-14
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Granted: 1990-10-23
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Expires: 2009-07-14
Abstract
Abstract Holographic notch filters are provided that comprise photopolymer films, having an optical density of at least 2, mounted on a transparent substrate.
Inventors
- 👤 Dalen E. Keys
- 👤 William K. Smothers
- 👤 Torence J. Trout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:38
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03H; G03H1/00; G03H1/04; G02; G02B; G02B5/00; G02B5/20; G02B5/203; G02B5/32; G03F7/0005; G03F7/001; G03H1/02; G03H1/18; G03H1/22; G03H1/24; G03H1/182; G03H2001/026; G03H2240/00; G03H2240/50; G03H2240/54; G03H2250/00; G03H2250/44; G03H2260/00; G03H2260/12; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/113
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
144 words
A holographic notch filter comprising a transparent substrate that bears a transparent polymeric film containing a reflection hologram, said reflection hologram having an optical density of greater than approximately 2 at the wavelength of maximum reflection and said film, prior to recording of the hologram, consisting essentially of: (a) approximately 25 to 75% of a polymeric binder selected from the group consisting of polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl formal, interpolymers containing major segments thereof, and mixtures thereof; (b) approximately 5 to 60% of an ethylenically unsaturated liquid monomer containing at least one phenyl, biphenyl, phenoxy, naphthyl, naphthyloxy, heteroaromatic groups containing up to three aromatic rings, chlorine or bromine moiety; (c) approximately 0 to 25% of a plasticizer; and (d) approximately 0.1 to 10% of a photoinitiator system activatable by actinic radiation; wherein said percentages are weight percentages based on total film weight.
Claim 2
Dependent Claim
144 words
A holographic notch filter comprising a transparent substrate that bears a transparent polymeric film containing a reflection hologram, said reflection hologram having an optical density of greater than approximately 2 at the wavelength of maximum reflection and said film, prior to recording of the hologram, consisting essentially of: (a) approximately 25 to 75% of a polymeric binder selected from the group consisting of polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl formal, interpolymers containing major segments thereof, and mixtures thereof; (b) approximately 5 to 60% of an ethylenically unsaturated liquid monomer containing at least one phenyl, biphenyl, phenoxy, naphthyl, naphthyloxy, heteroaromatic groups containing up to three aromatic rings, chlorine or bromine moiety; (c) approximately 0 to 25% of a plasticizer; and (d) approximately 0.1 to 10% of a photoinitiator system activatable by actinic radiation; wherein said percentages are weight percentages based on total film weight.
Claim 3
Dependent Claim
25 words
The holographic notch filter of claim 1 wherein the filter has an optical density of at least approximately 3 at the wavelength of maximum reflection.
Claim 4
Dependent Claim
25 words
The holographic notch filter of claim 1 wherein the transparent substrate is selected from the group consisting of glass, quartz, polymethyl methacrylate, polycarbonate, and polystyrene.
Claim 5
Dependent Claim
15 words
The holographic notch filter of claim 1 additionally comprising one or more transparent polymeric films.
Claim 6
Dependent Claim
18 words
The holographic notch filter of claim 1 additionally comprising a protective layer attached to the transparent polymeric film.
Claim 7
Dependent Claim
19 words
The holographic notch filter of claim 1 wherein the hologram has a refractive index modulation greater than approximately 0.01.
Claim 8
Dependent Claim
35 words
The holographic notch filter of claim 6 wherein the ethylenically unsaturated monomer is selected from the group consisting of 2-phenoxyethyl acrylate, 2-phenoxyethyl methacrylate, phenol ethoxylate monoacrylate, 2-(1-naphthyloxy)ethyl acrylate, o-biphenyl methacrylate, o-biphenyl acrylate, and mixtures thereof.
Claim 9
Dependent Claim
31 words
The holographic notch filter of claim 6 wherein the components are present in the following approximate weight ranges: binder, 45 to 75%; monomer, 15 to 50%; and plasticizer, 0 to 15%.
Claim 10
Dependent Claim
20 words
The holographic notch filter of claim 8 wherein the hologram has a refractive index modulation of greater than approximately 0.025.
Claim 11
Dependent Claim
25 words
The holographic notch filter of claim 6 wherein the transparent substrate is selected from the group consisting of glass, quartz, polymethyl methacrylate, polycarbonate, and polystyrene.
Claim 12
Dependent Claim
15 words
The holographic notch filter of claim 6 additionally comprising one or more transparent polymeric films.
Claim 13
Dependent Claim
18 words
The holographic notch filter of claim 6 additionally comprising a protective layer attached to the transparent polymeric film.
Claim 14
Dependent Claim
22 words
The holographic notch filter of claim 6 wherein the film has a thickness in the range of approximately 10 to 100 micrometers.
Claim 15
Dependent Claim
19 words
The notch filter of claim 1 comprising a plurality of polymeric films imaged to reflect light having different wavelengths.
Claim 16
Dependent Claim
18 words
The notch filter of claim 1 wherein the polymeric film is imaged to reflect light having different wavelengths.
Claim 17
Dependent Claim
17 words
The holographic notch filter of claim 1 wherein a solid monomer is present with said liquid monomer.
Claim 18
Dependent Claim
50 words
The holographic notch filter of claim 16 wherein said solid monomer is selected from the group consisting of N-vinyl carbazole, 3,6-dibromo-9-vinyl carbazole, 2,4,6-tribromophenyl acrylate or methacrylate, pentachlorophenyl acrylate or methacrylate, 2-vinyl naphthalene, 2-naphthyl acrylate or methacrylate, 2-(2-naphthyloxy)ethyl acrylate or methacrylate, para-biphenyl methacrylate, t-butylphenyl methacrylate, di-(2-acryloxyethyl)-ether of tetrabromo-bisphenol-A and mixtures thereof.
Claim 19
Dependent Claim
25 words
The holographic notch filter of claim 17 wherein the filter has an optical density of at least approximately 3 at the wavelength of maximum reflection.
Claim 20
Dependent Claim
17 words
The holographic notch filter of claim 7 wherein a solid monomer is present with said liquid monomer.
Claim 21
Dependent Claim
51 words
The holographic notch filter of claim 19 wherein said solid monomer is selected from the group consisting of of N-vinyl carbazole, 3,6-dibromo-9-vinyl carbazole, 2,4,6-tribromophenyl acrylate or methacrylate, pentachlorophenyl acrylate or methacrylate, 2-vinyl naphthalene, 2-naphthyl acrylate or methacrylate, 2-(2-naphthyloxy)ethyl acrylate or methacrylate, para-biphenyl methacrylate, t-butylphenyl methacrylate, di-(2-acryloxyethyl)ether of tetrabromo-bisphenol-A and mixtures thereof.
Claim 22
Dependent Claim
25 words
The holographic notch filter of claim 20 wherein the filter has an optical density of at least approximately 3 at the wavelength of maximum reflection.
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