US4368950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image observation device having glass piled half mirror
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1980-11-25
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Granted: 1983-01-18
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Expires: 2000-11-25
Abstract
Abstract An image observation device having a glass piled half mirror composed of a translucent reflecting body and transparent bodies arranged at both sides of the reflecting body and having a substantially equal thickness. A plurality of images are disposed in symmetry with respect to a plane of symmetry constituted by the half mirror surface. Images are correctly superposed over entire portions thereof, without any offset, when these images are observed.
Inventors
- 👤 Takashi Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:09
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/14; G02B27/144; G09; G09F; G09F13/00; G09F13/04; G09F13/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
An image observation device having a glass piled half mirror, for observation of a plurality of images in superposition to each other, said half mirror including two transparent bodies of equal optical property and substantially equal thickness constituting both side portions thereof sandwiching a half mirror surface therebetween, said plurality of images being disposed in symmetry with respect to a plane of symmetry constituted by said half mirror surface, and a pair of light source boxes disposed in symmetry with respect to said plane of symmetry, each box being adapted to hold one image plate producing one of said plurality of images and having a light source therein and a filter thereon, said filters being of different colors complementary to each other, said light sources being adapted to illuminate said image plates through said filters.
Claim 2
Dependent Claim
135 words
An image observation device having a glass piled half mirror, for observation of a plurality of images in superposition to each other, said half mirror including two transparent bodies of equal optical property and substantially equal thickness constituting both side portions thereof sandwiching a half mirror surface therebetween, said plurality of images being disposed in symmetry with respect to a plane of symmetry constituted by said half mirror surface, and a pair of light source boxes disposed in symmetry with respect to said plane of symmetry, each box being adapted to hold one image plate producing one of said plurality of images and having a light source therein and a filter thereon, said filters being of different colors complementary to each other, said light sources being adapted to illuminate said image plates through said filters.
Claim 3
Dependent Claim
30 words
An image observation device as claimed in claim 1, further comprising register pins on said light source boxes for locating the plurality of image plates producing said plurality of images.
References Cited (Backward Citations)
US3419898A
Cited
GB1303466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |