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Primary Examiner: Goldstein, Herbert
Assistant Examiner:
Attorney: Brown, Murray, Flick & Peckham

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Title: High energy sensor

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Claims: I claim as my invention:

1. An electromagnetic wave energy sensor comprising a substrate of electrical insulating material, a first thermally sensitive electrical element carried on said substrate, a layer of electrically insulating thermally resistive material covering said first electrical element, a second thermally sensitive electrical element deposited on said thermally resistive material on the side thereof opposite said first electrical element, dielectric material covering said second electrical element and adapted to become heated by wave energy incident on the sensor, a layer of metallic reflective material deposited on said dielectric material for absorbing a fixed percentage of incident wave energy, the sensor being positioned with respect to incident wave energy so that said reflective material will reflect the major portion of the incident wave energy, and electrical circuit means coupled to the respective electrical elements for determining the energy per unit of area impinged on said sensor.

2. The wave energy sensor of claim 1 wherein said thermally sensitive electrical elements comprise resistors whose resistivity changes with temperature.

3. The wave energy sensor of claim 1 wherein said thermally sensitive electrical elements comprise thermocouples.

4. The wave energy sensor of claim 2 wherein said resistors are formed from platinum.

5. The wave energy sensor of claim 2 wherein said electrical circuit means coupled to the electrical elements determines the change in resistivity of said resistors due to heating thereof by incident wave energy.

6. The wave energy sensor of claim 4 wherein said electrical circuit means includes a bridge circuit supplied by a constant voltage source, and means for connecting the respective electrical elements into one leg of the bridge circuit.

7. The wave energy sensor of claim 1 wherein said reflective material comprises platinum.

8. The wave energy sensor of claim 1 including a layer of dielectric material covering said reflective material for enhancing and protecting the reflectivity thereof.

9. An array of sensor elements of the type defined in claim 1, and including multiplexing means for electrically interrogating both the first and second electrical elements in each sensor element in the array.
Other info:

Inventors: Pinson, George T. (Huntsville, AL, US)

Application Number: 459464
Filing Date: 1974-04-10
Publication_date: 1976-02-24
Assignee: The Boeing Company (Seattle, WA)
Primary Class(es): 374/32 250/352
Other Classes:
US Patent Ref:

2493651	Jan, 1950	Boelter et al.	73/190.
2666089	Jan, 1954	Gier et al.	73/355.
2938122	May, 1960	Tole	73/190.
3255632	Jun, 1966	Brooks	250/352.
3596514	Aug, 1971	Mefferd	73/190.
3693447	Sep, 1972	Sumikama	73/341.
3738168	Jun, 1973	Mansell	73/190.
3765238	Oct, 1973	Sumikama et al.	73/355.
3767928	Oct, 1973	Bishop et al.	250/338.

Other Refs: Other References: Davies et al., "Colorimeter with a Highly Reflecting Surface for measuring Intense Thermal Radiation," in Applied Optics, Aug. 71, Vol. 10, No. 8, pp. 1959-1960.
Brown, "Steady State Heat Flux Gauge," in Review of Scientific Instruments, pp. 384-385, Aug. 1964.