Patent EP0350014A2 successfully refreshed from Google Patents.
EP0350014A2
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EP
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Volume phase type hologram and method of manufacture thereof
Assignee: Canon Inc
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Filing: 1989-07-05
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Granted: —
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Expires: 2009-07-05
Abstract
Abstract A volume phase type hologram has a diffraction lattice recorded in a polymer layer where the diffraction lattice is recorded all through the thickness direction of the polymer layer. A method for preparing the volume phase type hologram comprises steps of exposing a photosensitive polymer layer provided on a substrate to an interference pattern; subjecting the polymer layer having been exposed to a first development treatment with a first organic solvent; and peeling the polymer later off the substrate and subjecting the polymer to a second development treatment with a second organic solvent from the side preferentially of the face that had been in contact with the substrate.
Inventors
- 👤 Yoko Yoshinaga
- 👤 Nobuo Kushibiki
- 👤 Tetsuro Kuwayama
- 👤 Naosato Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:30
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; G03H1/18; G03F; G03F7/00; G03F7/0005; G03F7/001; G03H1/02; G03H1/024; G03H1/0248; G03H1/182; G03H2001/026; G03H2001/0264; G03H2260/00; G03H2260/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
28 words
A volume phase type hologram having a diffraction lattice recorded in a polymer layer, said diffraction lattice being recorded all through the thickness direction of the polymer layer.
Claim 2
Dependent Claim
28 words
A volume phase type hologram having a diffraction lattice recorded in a polymer layer, said diffraction lattice being recorded all through the thickness direction of the polymer layer.
Claim 3
Dependent Claim
24 words
The volume phase type hologram of Claim 1, wherein the polymer layer has a thickness in the range from 5 µm to 15 µm.
Claim 4
Dependent Claim
13 words
The volume phase type hologram of Claim 1, wherein the polymer is poly(N-vinylcarbazole).
Claim 5
Dependent Claim
30 words
The volume phase type hologram of Claim 1, wherein the polymer has a weight-average molecular weight of not less than 1,000,000 and a molecular-weight distribution of not more than 3.
Claim 6
Dependent Claim
17 words
The volume phase type hologram of Claim 1, wherein the polymer layer is supported by a substrate.
Claim 7
Dependent Claim
22 words
The volume phase type hologram of Claim 1, wherein the polymer layer is supported by a substrate with interposition of an adhesive.
Claim 8
Dependent Claim
18 words
The volume phase type hologram of Claim 1, wherein the polymer layer is formed into a film independently.
Claim 9
Dependent Claim
18 words
The volume phase type hologram of Claim 1, wherein the hologram has diffraction peaks at two different wavelength.
Claim 10
Independent Claim
79 words
A method for preparing a volume phase type hologram, comprising steps of exposing a photosensitive polymer layer provided on a substrate to an interference pattern; subjecting the polymer layer having been exposed to a first development treatment with a first organic solvent; and peeling the polymer later off the substrate and subjecting the polymer to a second development treatment with a second organic solvent from the side preferentially of the face that had been in contact with the substrate.
Claim 11
Independent Claim
79 words
A method for preparing a volume phase type hologram, comprising steps of exposing a photosensitive polymer layer provided on a substrate to an interference pattern; subjecting the polymer layer having been exposed to a first development treatment with a first organic solvent; and peeling the polymer later off the substrate and subjecting the polymer to a second development treatment with a second organic solvent from the side preferentially of the face that had been in contact with the substrate.
Claim 12
Dependent Claim
43 words
The method of Claim 9, wherein the polymer layer peeled off is re-fixed to the substrate with a face opposite to the side that had been in contact with the substrate, and then the polymer layer is subjected to said second development treatment.
Claim 13
Dependent Claim
12 words
The method of Claim 9, wherein the substrate is a glass plate.
Claim 14
Dependent Claim
23 words
The method of Claim 2, wherein the polymer layer is swelled and shrinked in both of the first and the second development treatment.
Claim 15
Dependent Claim
19 words
The method of Claim 9, wherein the first and the second development treatments are conducted under a same condition.
Claim 16
Dependent Claim
18 words
The method of Claim 9, wherein the first and the second treatments are conducted respectively under different conditions.
Claim 17
Dependent Claim
21 words
The method of Claim 9, wherein the polymer layer has a thickness in the range from 5 µm to 15 µm.
Claim 18
Dependent Claim
10 words
The method of Claim 9, wherein the polymer is poly(N-vinylcarbazole).
Claim 19
Dependent Claim
27 words
The method of Claim 9, wherein the polymer has a weight-average molecular weight of not less than 1,000,000 and a molecular-weight distribution of not more then 3.
Claim 20
Dependent Claim
16 words
The method of Claim 9, wherein the photosensitive polymer has sensivity in a visible wavelength region.
Claim 21
Dependent Claim
16 words
The method of Claim 9, wherein the polymer layer is peeled off by immersion in water.
Claim 22
Dependent Claim
17 words
The volume phase type hologram of Claim 1, wherein the polymer layer has a uniform thickness throughout.
References Cited (Backward Citations)
No citation records indexed.
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