Blackbodies

Blackbodies provide the source of optical energy typically used for EO/IR sensor calibration. Sensor-specific requirements can drive the temperature range, size, or accuracy of the blackbody. SDL has developed many blackbodies ranging from large area vacuum blackbodies to small special-purpose blackbodies. Development of these blackbodies requires specialized thermal engineering skills.

Features

  • Size customizable
  • Cavity-enhanced, honeycomb, etc.
  • Low and medium temperature
  • NIST-radiance traceability through LWIRCS
Parameter LWIRCS HAES15 HAES20
Radiance Source
SDL Low Temp BB
SDL Med Temp BB
External Dimensions
(length x diameter)
40” x 16” Cold tube: 54” x 25”;
BB tube: 67” x 25”
20” dia. 18” L x 7.5” W x 12.6” H
Operating Temperature Range 100 K to 350 K 100 K to 350 K 100 K to 350 K LTBB 80 – 353 K
(-193 to 80⁰C)
MTBB 298 – 523 K (25 – 250⁰C)
Normal Emissivity 1-15 μm: > 0.9999, 15-35 μm: > 0.9998, 35-100 μm > 0.9980 1-20 μm: >0.996, 20-25 μm: >0.994 .4-5 μm >0.99 > 99.5% for 1 μm < λ < 30 μm
Radiometric Aperture 6” exit aperture 15” exit aperture 15” full aperture 15” exit aperture

Experience

GIFTS

Geosynchronous Imaging Fourier Transform Spectrometer

GIFTS was successfully tested and calibrated as an engineering demonstration unit to ground-validate technologies critical to NOAA’s Hyperspectral Environmental Suite for the Geostationary Operational Environmental Satellite (GOES) system.

FIRST

Far-Infrared Spectroscopy of the Troposphere

FIRST is a long–wave imaging spectrometer that measures between 10–100 µm, filling a gap in the existing systems that monitored the Earth’s climate.