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 Title: |
US5217832:
Permanent color transparencies on single substrates and methods for making the same
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Joslin, Robert W.; Burbank, CA
Nelson, Kathleen L.; Pasadena, CA
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| Assignee: |
The Walt Disney Company, Burbank, CA
other patents from WALT DISNEY COMPANY (617665) (approx. 101)
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| Published / Filed: |
1993-06-08
/ 1992-01-23
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| Application Number: |
US1992000824670
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| IPC Code: |
Advanced:
G03F 7/00;
Core:
more...
IPC-7:
G03F 7/00;
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| U.S. Class: |
Current:
430/007;
359/590;
430/015;
430/290;
430/293;
430/321;
430/323;
430/324;
430/325;
430/329;
Original:
430/007;
430/321;
430/015;
430/290;
430/293;
430/323;
430/324;
430/325;
430/329;
359/590;
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| Field of Search: |
430/321,7,15,21,290,293,323,324,364,394,325,329
427/162,166
359/590
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| Priority Number: |
| 1992-01-23 |
US1992000824670 |
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| Abstract: |
Color transparencies having more than one imaged dichroic filter, and an imaged neutral density filter, layered on one side of a single glass substrate, and processes for making the same, are disclosed. In one embodiment, the color transparency is produced by a deposition process including the steps of coating a glass substrate with a photoresist and developing an image thereupon, depositing alternating layers of high and low refractive index dielectrics to form a dichroic layer of a primary subtractive color, stripping the photoresist from the glass, preparing at least one additional imaged dichroic filter on the first, and preparing a neutral density filter on the substrate on the side having the layered dichroic filters. A red antihalation coating may be applied to the lower surface of the glass substrate prior to exposing the photoresist to prevent undesirable exposure of additional portions of the photoresist layer. In an alternative embodiment, an etching process is utilized whereby stop-etch layers are deposited between each layer of the color transparency. The stop-etch layers prevent image distortion and uneven coloring during the etching process such that a high resolution color transparency is produced.
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| Attorney, Agent or Firm: |
Pretty, Schroeder, Brueggemann & Clark ;
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| Primary / Asst. Examiners: |
Bowers, Jr., Charles L.; McPherson, John A.
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
Show 2 known family members
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First Claim:
Show all 16 claims |
We claim:
1. A process for preparing a color transparency having a single substrate comprising:
- coating a glass substrate on one surface with a photoresist;
- developing an image on the photoresist;
- depositing alternating layers of high and low refractive index dielectrics on the imaged photoresist to create a dichroic filter of a desired color;
- stripping the photoresist from the glass substrate whereby a first imaged dichroic filter layer is produced;
- preparing at least one additional imaged dichroic filter layer in the same manner as the first; and
- preparing an imaged neutral density filter on the side of the substrate having the dichroic filters, the neutral density filter being prepared in the same manner as for the imaged dichroic filters with the exception that only a single layer of metal is deposited on the imaged photoresist rather than alternating layers of high and low refractive index dielectrics.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 7 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other References: |
"Full-color photosensitive glass" by S. Donald Stookey, George H. Beall, and Joseph E. Pierson, Oct. 1978, J. Appl. Phys. vol. 49, No. 10, pp. 5114-5123.
(10 pages)
Cited by 5 patents
"Nondegrading color transparencies" by Fred J. van Milligen, Steven G. Saxe, Ursula J. Gibson, and H. A. Macleod Applied Optics, vol. 24, No. 4, dated Feb. 1985, pp. 461-463.
(3 pages)
Cited by 2 patents
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