초록 ▼

The temperature of a thermally emitting target which radiates over a band of wavelengths which includes first and second spaced wavelengths and which has an unknown emissivity characteristic at which the emissivity at one wavelength may but does not necessarily differ from the emissivity of another

The temperature of a thermally emitting target which radiates over a band of wavelengths which includes first and second spaced wavelengths and which has an unknown emissivity characteristic at which the emissivity at one wavelength may but does not necessarily differ from the emissivity of another wavelength is read remotely by [a]deriving signals from those portions of the thermal radiation at these two wavelengths; [b]deriving signals from the reflected portions of two beams of radiation at these wavelengths which strike the target; and [c]by using these derived signals to compute the temperature.

대표청구항 ▼

Apparatus for remotely reading the temperature of a thermally radiating target which radiates over a band of wavelengths which includes first and second spaced wavelengths, said target having an unknown emissivity characteristic at which the emissivity at one wavelength may but does not necessarily

Apparatus for remotely reading the temperature of a thermally radiating target which radiates over a band of wavelengths which includes first and second spaced wavelengths, said target having an unknown emissivity characteristic at which the emissivity at one wavelength may but does not necessarily differ from the emissivity of another wavelength, said apparatus comprising: first means responsive to that portion of the thermal radiation at said first wavelength which impinges on said first means to derive therefrom a first electrical signal which varies monotonically with the thermal radiation at said first wavelength; second means responsive to that portion of the thermal radiation at said second wavelength which impinges on said second means to derive therefrom a second electrical signal which varies monotonically with the thermal radiation at said second wavelength; third means to direct a first beam of radiation at said first wavelength upon said target whereby a portion of said first beam is reflected from said target; fourth means to direct a second beam of radiation at said second wavelength upon said target whereby a portion of said second beam is reflected from said target; fifth means responsive to that portion of the first reflected beam which impinges on said fifth means to derive therefrom a third electrical signal which varies monotonically therewith with the reflected portion of the first reflected beam; sixth means responsive to that portion of the second reflected beam which impinges on said sixth means to derive therefrom a fourth electrical signal which varies monotonically with the reflected portion of the second reflected beam; and seventh means responsive to said first, second, third and fourth signals to compute the temperature of said target.