US3575510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image correction device
Assignee: Panasonic Holdings Corp
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Filing: 1968-04-01
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Granted: 1971-04-20
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Expires: 1988-04-01
Abstract
Abstract A device for correcting an image formed on a photographic film, having a layer of a radiation-sensitive luminescent material disposed opposite to the photographic film. The luminescent layer acts as a source of light having an intensity distribution corresponding to the relative light transmissivity of the image on the film and the light from the light source is projected on the film thereby correcting the contrast of the original image.
Inventors
- 👤 Tadao Kohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:30
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
An image correction device comprising a transparent plate having a reflective surface, said plate being adapted to support a transparency on said reflective surface, a phosphor screen disposed opposite to and spaced from said reflective surface of said transparent plate, optical means disposed between said transparent plate and said phosphor screen for focusing an image contained in a transparency placed upon said transparent plate on said phosphor screen, and means for uniformly irradiating said transparency on the side facing said phosphor screen.
Claim 2
Dependent Claim
82 words
An image correction device comprising a transparent plate having a reflective surface, said plate being adapted to support a transparency on said reflective surface, a phosphor screen disposed opposite to and spaced from said reflective surface of said transparent plate, optical means disposed between said transparent plate and said phosphor screen for focusing an image contained in a transparency placed upon said transparent plate on said phosphor screen, and means for uniformly irradiating said transparency on the side facing said phosphor screen.
Claim 3
Dependent Claim
17 words
An image correction device as defined in claim 1, wherein said Irradiating means comprises ultraviolet radiation means.
Claim 4
Dependent Claim
27 words
An image correction device as defined in claim 1, wherein said phosphor screen is formed of infrared quenchable phosphor and said irradiating means comprises ultraviolet radiation means.
Claim 5
Dependent Claim
138 words
An image correction device comprising a radiation-sensitive luminescent element; said element having an electroluminescent layer, an energy-sensitive layer, materials of said energy-sensitive layer being chosen so that the sensitive wavelength range thereof and the luminescent wavelength range of the electroluminescent layer do not largely overlap, and a dielectric layer; said three layers being laminated in mentioned order an interposed between a first planar electrode and a second planer and transparent electrode; a third foraminate electrode being embedded in said energy-sensitive layer; said second transparent electrode being adapted to receive a transparency thereon; AC power sources respectively connected between said first and second electrodes and between said second and third electrodes; and means for focusing an image contained in a transparency placed upon said second electrode on a sensitive sheet to be placed opposite to said radiation-sensitive luminescent element.
Claim 6
Dependent Claim
138 words
An image correction device comprising a radiation-sensitive luminescent element; said element having an electroluminescent layer, an energy-sensitive layer, materials of said energy-sensitive layer being chosen so that the sensitive wavelength range thereof and the luminescent wavelength range of the electroluminescent layer do not largely overlap, and a dielectric layer; said three layers being laminated in mentioned order an interposed between a first planar electrode and a second planer and transparent electrode; a third foraminate electrode being embedded in said energy-sensitive layer; said second transparent electrode being adapted to receive a transparency thereon; AC power sources respectively connected between said first and second electrodes and between said second and third electrodes; and means for focusing an image contained in a transparency placed upon said second electrode on a sensitive sheet to be placed opposite to said radiation-sensitive luminescent element.
Claim 7
Dependent Claim
25 words
An image correction device as defined in claim 4, further comprising means for uniformly irradiating a transparency placed on said second electrode with infrared rays.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |