US4978593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hologram transfer process
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1989-09-25
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Granted: 1990-12-18
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Expires: 2009-09-25
Abstract
Abstract A method is disclosed for making holograms on transparent surfaces. A protective thin substrate 18 is laminated to a temporary support 24 for processing. This procedure protects the delicate thin substrate 18 through the processing steps. Upon completion of the processing steps, the thin substrate 18 is then removed from the temporary support 24. The applied photosensitive material gives the delicate thin substrate 18 added strength. The thin substrate 18 is then laminated to the final surface 26. In one embodiment, the final surface 26 corresponds to a car windshield 34. Playback lamps 36 located in the dashboard 32 illuminate the thin substrate 18 to read the holographic image.
Inventors
- 👤 Khin S. Yin
- 👤 Michael J. Virgadamo
- 👤 David D. Tanaka
- 👤 Angel F. Banuelos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:20
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/02; G03H1/0252; G03C; G03C1/00; G03C1/66; G03H1/04; G03H1/18; G03H1/182; G03H2250/00; G03H2250/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
108 words
A method for making a hologram comprising: (a) mounting a first side of a thin substrate to a temporary thicker support which includes: (i) applying adhesive between the first side of said thin substrate and said temporary support, and (ii) exposing said thin substrate to ultraviolet radiation until said adhesive has cured; (b) coating a second side of said thin substrate with a photosensitive material; (c) exposing said photosensitive material to produce a hologram therein; (d) developing the hologram while on the temporary support; (e) removing said thin substrate from said temporary substrate; and (f) laminating said thin substrate to a final surface with the second side down.
Claim 2
Independent Claim
108 words
A method for making a hologram comprising: (a) mounting a first side of a thin substrate to a temporary thicker support which includes: (i) applying adhesive between the first side of said thin substrate and said temporary support, and (ii) exposing said thin substrate to ultraviolet radiation until said adhesive has cured; (b) coating a second side of said thin substrate with a photosensitive material; (c) exposing said photosensitive material to produce a hologram therein; (d) developing the hologram while on the temporary support; (e) removing said thin substrate from said temporary substrate; and (f) laminating said thin substrate to a final surface with the second side down.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein step (d) includes placing said thin substrate and said temporary support into an oven at 60°-100° Celsius for stabilization of the peak reflection wavelengths of the hologram until said adhesive softens.
Claim 4
Dependent Claim
26 words
The method of claim 2, wherein step (d) includes cutting around the edge of said thin substrate with a razor blade to remove excess photosensitive material.
Claim 5
Dependent Claim
55 words
The method of claim 3, wherein said removal of said excess photosensitive material is accomplished by placing a lint-free towel over said second side of said thin substrate, applying a rubber roller on top of said towel, removing said lint-free towel and applying a solvent wipe to remove the remainder of said excess photosensitive material.
Claim 6
Dependent Claim
10 words
The method of claim 4, wherein said solvent is acetone.
Claim 7
Dependent Claim
11 words
The method of claim 1, wherein said thin substrate is glass.
Claim 8
Dependent Claim
11 words
The method of claim 1, wherein said final surface is glass.
Claim 9
Dependent Claim
34 words
The method of claim 1, wherein step (a) includes forming a puddle of adhesive on said temporary thicker support, centering said thin substrate and lowering said thin substrate slowly onto said temporary thicker support.
Claim 10
Dependent Claim
15 words
The method of claim 1, wherein step (b) includes allowing said photosensitive material to dry.
Claim 11
Dependent Claim
15 words
The method of claim 1, wherein step (c) includes index matching to eliminate noise holograms.
Claim 12
Dependent Claim
23 words
The method of claim 1, wherein step (d) includes using a stainless steel shim to remove said thin substrate from said temporary support.
Claim 13
Dependent Claim
12 words
The method of claim 1, wherein said photosensitive material is dichromated gelatin.
Claim 14
Dependent Claim
21 words
The method of claim 1, wherein step (f) includes using dried polyvinyl butryal to affix the substrate to the final surface.
Claim 15
Independent Claim
120 words
A method for attaching a thin, transparent holographic substrate to a windshield of a vehicle, said improvement comprising: (a) adhering a first side of said thin, transparent substrate with adhesive to a temporary support, which includes exposing said thin, transparent substrate and said temporary support to ultraviolet radiation to cure said adhesive; (b) covering a second side of said thin, transparent substrate with a photosensitive material; (c) illuminating said photosensitive material such that a desired holographic image is produced therein; (d) subjecting said thin substrate and said temporary support to wet processing to develop the holographic image; (e) detaching said transparent substrate from said temporary support; and (f) securing said transparent substrate, second side down, with adhesive to said windshield.
Claim 16
Independent Claim
120 words
A method for attaching a thin, transparent holographic substrate to a windshield of a vehicle, said improvement comprising: (a) adhering a first side of said thin, transparent substrate with adhesive to a temporary support, which includes exposing said thin, transparent substrate and said temporary support to ultraviolet radiation to cure said adhesive; (b) covering a second side of said thin, transparent substrate with a photosensitive material; (c) illuminating said photosensitive material such that a desired holographic image is produced therein; (d) subjecting said thin substrate and said temporary support to wet processing to develop the holographic image; (e) detaching said transparent substrate from said temporary support; and (f) securing said transparent substrate, second side down, with adhesive to said windshield.
Claim 17
Dependent Claim
15 words
The method of claim 14, wherein the adhesive of step (f) is dried polyvinyl butyral.
References Cited (Backward Citations)
US4842389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |