# US 5,703,276 A · One-window cell for testing passive remote vapor detectors

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- Number: US 5,703,276 A
- Document ID: US5703276A
- Status: Granted
- Kind: A
- Application number: 08/655,525
- Filed: 1996-05-30
- Granted: 1997-12-30
- Earliest claimed: 1996-05-30
- Assignees: The United States of America as represented by the Secretary of the Army
- Inventors: Dennis F. Flanigan
- Web page: https://patentgrep.com/patent/US5703276A

## CPC

- G01J 5/06: Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity (for adjusting of solid angle of collected radiation G01J5/07; means for wavelength selection G01J5/0801)
- G01J 5/52: using comparison with reference sources, e.g. disappearing-filament pyrometer
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

A cell for testing passive remote vapor detectors has a cell body with a blackbody radiation source attached to a first end and a window attached to a second end. The blackbody radiation source and the window seal the first and second ends, so that a hazardous vapor can be easily contained. With this arrangement, it is easy to account for the effects of the window on output radiation and thus to calculate radiance and temperature quantities of interest.

## Claims

### Claim 1

A one-window cell for testing passive remote vapor detectors comprising:
a cell body for containing a vapor, the cell body having a first end and a second end;
a blackbody radiation source for emitting radiation, the blackbody radiation source being attached to the first end of the cell body to seal the first end of the cell body;
a window, at least partially transparent to the radiation emitted by the blackbody radiation source, attached to the second end of the cell body to seal the second end of the cell body;
first temperature measurement and control means for measuring and controlling a temperature of the blackbody radiation source; and
second temperature measurement and control means for measuring and controlling a temperature of the vapor.

### Claim 2 (depends on 1)

A one-window cell as in claim 1, wherein the blackbody radiation source and the window lie along a common optical axis to which the window is orthogonal.