US3608817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling color of an object by its radiation and device for accomplishing the same
Assignee: Individual
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Filing: 1968-12-09
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Granted: 1971-09-28
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Expires: 1988-12-09
Abstract
Abstract A method for controlling color temperature of an object by its radiation from which at least two radiation fluxes of different spectral compositions are separated and thereafter transformed in a device including a flux ratio setter disposed in front of or ahead of a radiation receiver, a modulator and a limiting amplifier, the transformation of the fluxes or corresponding signals being effected so as to equalize them when the object under examination acquires a temperature to be maintained constant, while temperature deviation from the preset value results in an unbalance signal which is fed to a heater of the object in order to nullify the unbalance of the aforesaid radiation fluxes.
Inventors
- 👤 Dary Yakovlevich Svet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:33
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/60; G05; G05D; G05D23/00; G05D23/19; G05D23/27
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
A method of controlling color temperature of an object by its radiation comprising the steps of selecting at least two fluxes of different spectral compositions, transforming said fluxes into electric signals proportional to the luminances of said fluxes, the ratio of said signals defining the color temperature of the object, reducing the flux having a higher intensity until said ratio is unity at which time the object will be at a constant desired temperature, continuously producing the difference between said signals and controlling the temperature of said object until the difference equals zero.
Claim 2
Independent Claim
93 words
A method of controlling color temperature of an object by its radiation comprising the steps of selecting at least two fluxes of different spectral compositions, transforming said fluxes into electric signals proportional to the luminances of said fluxes, the ratio of said signals defining the color temperature of the object, reducing the flux having a higher intensity until said ratio is unity at which time the object will be at a constant desired temperature, continuously producing the difference between said signals and controlling the temperature of said object until the difference equals zero.
Claim 3
Independent Claim
166 words
A device for controlling color temperature of an object by utilizing its radiation, comprising an object radiation receiver adapted for selecting at least two fluxes of different spectral composition and transforming said fluxes into output pulses; optical means concentrating radiation on said receiver; a monochromator supported between said optical means and said receiver; a modulator supported in the path of the radiation fluxes from the object in front of said receiver and adapted for periodically interrupting the radiation fluxes and maintaining a low pulse duty ratio; means comprising an optical element having a varying spectral transmittance on the surface thereof and disposed ahead of said receiver in the path of the flux for setting the required ratio between said selected radiation fluxes; a limiting amplifier connected to the output of the receiver to transform said pulses; a phase stage connected to the output of said limiting amplifier and means for supplying said phase stage with reference voltage synchronized with the operation of said modulator and monochromator.
Claim 4
Independent Claim
166 words
A device for controlling color temperature of an object by utilizing its radiation, comprising an object radiation receiver adapted for selecting at least two fluxes of different spectral composition and transforming said fluxes into output pulses; optical means concentrating radiation on said receiver; a monochromator supported between said optical means and said receiver; a modulator supported in the path of the radiation fluxes from the object in front of said receiver and adapted for periodically interrupting the radiation fluxes and maintaining a low pulse duty ratio; means comprising an optical element having a varying spectral transmittance on the surface thereof and disposed ahead of said receiver in the path of the flux for setting the required ratio between said selected radiation fluxes; a limiting amplifier connected to the output of the receiver to transform said pulses; a phase stage connected to the output of said limiting amplifier and means for supplying said phase stage with reference voltage synchronized with the operation of said modulator and monochromator.
Claim 5
Dependent Claim
63 words
A device as claimed in claim 2, wherein said optical element with varying spectral transmittance on the surface thereof is a color wedge having a Z-shaped spectral transmittance vs. wavelength curve and a nonselective absorber rigidly connected with the color wedge, and including shifting means to vary the relative position of the center of the radiation flux with respect to said optical element.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |