US3776725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-stimulus print
Assignee: Polaroid Corp
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Filing: 1971-12-01
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Granted: 1973-12-04
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Expires: 1991-12-01
Abstract
Abstract An improved bi-stimulus print is disclosed which provides more faithful rendition of the colors perceived therein. One perceives color in an image recorded on a bi-stimulus print by illuminating the front of the bi-stimulus print with light having one wavelength distribution and by simultaneously illuminating the back with light having another wavelength distribution and viewing, together, an image conveyed from the front by reflected light and another image conveyed from the back by transmitted light. A negative of the front image located on the back of the improved bi-stimulus print in precise registration with the other images compensates for the modulation of the transmitted light by the front image. Improved bi-stimulus anaglyphs are also described.
Inventors
- 👤 Cann J Mc
- 👤 J Scarpetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:37
CPC Classifications
G; G03; G03C; G03C7/00; G03C9/00; G03C9/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
27 words
The article described in claim 1, further comprising means for establishing and maintaining registration between said first modulating means, said second modulating means, and said compensating means.
Claim 2
Dependent Claim
87 words
An improved bi-stimulus print, comprising: a translucent sheet having front and rear surfaces; a positive first image, recording a first aspect of a subject, at the front of said translucent sheet; a negative of said first image at the rear of said translucent sheet in precise registration with said positive first image; and a positive second image, recording a second aspect of said subject, also at the rear of said translucent sheet and in registration with said positive first image and said negative of said first image.
Claim 3
Dependent Claim
24 words
The improved bi-stimulus print described in claim 3, wherein said first and second aspects of said subject are stereoscopically related perspectives of said subject.
Claim 4
Dependent Claim
29 words
The improved bi-stimulus print described in claim 4, wherein said first and second aspects of said subject are stereoscopically related left eye and right eye views of said subject.
Claim 5
Dependent Claim
25 words
The improved bi-stimulus print described in claim 3, wherein said first and second aspects of said subject are first and second color separation images thereof.
Claim 6
Dependent Claim
87 words
An improved bi-stimulus print, comprising: a translucent sheet having front and rear surfaces; a positive first color separation image of a subject at the front of said translucent sheet; a negative of said first color separation image at the rear of said translucent sheet in precise registration with said positive first color separation image; and a positive second color separation image of said subject also at the rear of said translucent sheet and in registration with said positive and said negative of said first color separation image.
Claim 7
Dependent Claim
51 words
The improved bi-stimulus print of claim 7, wherein said first color separation image records the relative intensities of color stimuli in said subject associated with middle wavelengths of light, and said second color separation image records the relative intensities of color stimuli in said subject associated with long wavelengths of light.
Claim 8
Dependent Claim
54 words
The bi-stimulus print of claim 8, wherein said first color separation image records the relative intensities of color stimuli in said subject associated with a wavelength shorter than 580 nanometers, and said second color separation image records the relative intensities of color stimuli in said object associated with a wavelength longer than 580 nanometers.
Claim 9
Dependent Claim
40 words
The bi-stimulus print of claim 9, wherein said first color separation image records the relative intensities associated with green color in said subject, and said second color separation image records the relative intensities associated with red color in said subject.
Claim 10
Dependent Claim
112 words
An improved bi-stimulus print of a subject comprising: a translucent sheet having a front surface and a back surface; first image means, on said front surface, comprising a positive graphic record of the relative intensities of first color stimuli, associated with a first spectral region, in said subject, for modulating reflected light; second image means, on said back surface, comprising a negative graphic record of the relative intensities of said first color stimuli for modulating transmitted light; and third image means, on said back surface, comprising a positive graphic record of the relative intensities of second color stimuli, associated with a second spectral region, in said subject for modulating said transmitted light.
Claim 11
Dependent Claim
24 words
The improved bi-stimulus print described in claim 11, wherein said second and third image means are in precise registration with said first image means.
Claim 12
Dependent Claim
28 words
The improved bi-stimulus print described in claim 12, wherein said first spectral region comprises wavelengths of light shorter than the wavelengths of light comprising said second spectral region.
Claim 13
Dependent Claim
33 words
The bi-stimulus print described in claim 13, wherein said first spectral region comprises wavelengths of light shorter than 580 nanometers and said second spectral region comprises wavelengths of light longer than 580 nanometers.
Claim 14
Dependent Claim
21 words
The bi-stimulus print described in claim 14, wherein said first spectral region is green and said second spectraL region is red.
Claim 15
Independent Claim
102 words
A method for making an improved bi-stimulus print with an image of a subject perceivable in color, comprising the steps of: forming a positive first color separation image of said subject; forming a negative of said first color separation image; forming a positive second different color separation image of said subject; recording said images; disposing said first positive color separation image on one side of a translucent sheet; disposing said negative of said first color separation image and said positive second color separation image on the opposite side of said translucent sheet; and registering said images in precise alignment with each other.
Claim 16
Dependent Claim
86 words
An improved bi-stimulus print, comprising: a translucent sheet with first and second sides; a positive green color separation image on said first side of said translucent sheet; a negative of said green color separation image on said second side of said translucent sheet in registration with said positive green color separation image; and a positive red color separation image of said subject also on said second side of said translucent sheet and in registration with said positive and said negative of said first color separation image.
Claim 17
Independent Claim
144 words
A system by means of which an image may be viewed, comprising: a translucent sheet; a positive first image means, on the front of said translucent sheet, for presenting one aspect of a subject; a negative of said first image means at the rear of said translucent sheet in registration with said positive first image means; a positive second image means, also at the rear of said translucent sheet and in registration with said positive first image means, for presenting a different aspect of said subject; means for illuminating the rear of said translucent sheet with one color of light; and means for illuminating the front of said translucent sheet with a second color of light, whereby light reflecting from said translucent layer will preclude perception of said second image means by an observer except by means of light transmitted through said translucent layer.
Claim 18
Dependent Claim
30 words
The system described in claim 18, wherein said one aspect of a subject and said different aspect of said subject represent right and left stereoscopic perspective views of said subject.
Claim 19
Dependent Claim
26 words
The system described in claim 18, wherein said one aspect of a subject and said different aspect of said subject represent different colors within said subject.
Claim 20
Dependent Claim
64 words
The system described in claim 20, wherein said one aspect is the green color values in said subject and said different aspect is the red color values of said subject, and wherein said one color of light illuminating the rear of said translucent sheet is red light and said second color of light for illuminating the front of said translucent sheet is white light.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |