Patent US5157464A successfully refreshed from Google Patents.
US5157464A
Expired / Lapsed
US
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Apparatus for viewing
Assignee: Aalto-yliopisto
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Filing: 1989-05-08
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Granted: 1992-10-20
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Expires: 2009-05-08
Abstract
Abstract The invention applies a viewing system used for reproduction or proofing based on the colorimetric analysis, the characteristics of which are based on the fact that the external conditions affecting the visual color impression of the screen image or other non-reflecting image and of the reflecting image the same. Furthermore, as all the colors in the images have the same chromaticity and luminance, the internal charcteristics of the images do not distort the total color impression, either. In the viewing system the screen or other non-reflecting image (1) is placed behind a uniformly illuminated, usually medium gray, viewing plane (4). The viewing plane is provided with an opening of the same size and shape as the reflecting image, through which viewer sees a part of the screen or other non-reflecting image, and another opening for the reflecting image (6).
Inventors
- 👤 Pekka Laihanen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:39
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
124 words
A system for viewing a reflecting and/or a non-reflecting image, to be used for reproduction or proofing based on colorimetric analysis, comprising: a box with a rear wall and a front wall; a viewing plane on the rear wall of the box; a first opening in the viewing plane for a reflecting image; a second opening in the viewing plane for a non-reflecting image; means for uniformly illuminating the viewing plane and the reflecting image visible through the first opening in the viewing plane without illuminating the surface of the non-reflecting image visible through the second opening in the viewing plane; a viewing opening in the front wall of the box through which the reflecting image and the non-reflecting image can be viewed simultaneously.
Claim 2
Independent Claim
124 words
A system for viewing a reflecting and/or a non-reflecting image, to be used for reproduction or proofing based on colorimetric analysis, comprising: a box with a rear wall and a front wall; a viewing plane on the rear wall of the box; a first opening in the viewing plane for a reflecting image; a second opening in the viewing plane for a non-reflecting image; means for uniformly illuminating the viewing plane and the reflecting image visible through the first opening in the viewing plane without illuminating the surface of the non-reflecting image visible through the second opening in the viewing plane; a viewing opening in the front wall of the box through which the reflecting image and the non-reflecting image can be viewed simultaneously.
Claim 3
Dependent Claim
21 words
A viewing system as set forth in claim 1, in which the non-reflecting image is essentially placed behind the viewing plane.
Claim 4
Dependent Claim
21 words
A viewing system as set forth in claim 1, in which the reflecting image is essentially placed behind the viewing plane.
Claim 5
Dependent Claim
29 words
A viewing system as set forth in claim 1, in which the reflecting image and the non-reflecting image are placed at substantially the same distance behind the viewing plane.
Claim 6
Dependent Claim
29 words
A viewing system as set forth in claim 1, in which the means for illuminating consists of light sources which illuminate both the reflecting image and the viewing plane.
Claim 7
Dependent Claim
30 words
A viewing system as set forth in claim 1, in which the means for illuminating comprises separate light sources for illuminating the reflecting image and for illuminating the viewing plane.
Claim 8
Dependent Claim
22 words
A viewing system as set forth in claim 1, in which the viewing plane is a semitranslucent, diffuse plane illuminated from behind.
Claim 9
Dependent Claim
19 words
A viewing system as set forth in claim 1, in which the viewing plane has a medium grey surface.
Claim 10
Dependent Claim
24 words
A viewing system as set forth in claim 1, in which the viewing plane has a surface which is lined with a printing paper.
Claim 11
Dependent Claim
47 words
A viewing system as set forth in claim 1, in which both the size and the shape of the first and second openings for the reflecting image and the non-reflecting image can be adjusted according to the size and the shape of the image to be viewed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |