Open Access

A new technique of radiation thermometry using a consumer digital camcorder: Observations of red glow at Aso volcano, Japan

  • Takeshi Saito11Email author,
  • Satoshi Sakai21,
  • Isao Iizawa21,
  • Eriko Suda31,
  • Kazuhiro Umetani21,
  • Katsuya Kaneko21,
  • Yoshitsugu Furukawa41 and
  • Takahiro Ohkura41
Earth, Planets and Space201457:BF03352550

Received: 8 October 2004

Accepted: 9 February 2005

Published: 21 June 2014


We newly developed a technique of radiation thermometry using a Sony’s consumer digital camcorder. Our system is not only convenience and cost effective but with a better performance than previous infrared thermometers, particularly in the place like a crater of volcano where is abundant in gas. This is because our system uses the submicron wavelength band, in which radiation is less influenced by absorption of gas than in the thermal infrared wavelength (>3 μm). We carried out observations of red glow at Aso volcano and succeeded in measuring the temperature of about 800°C, which is much more acceptable than previously reported values of 200–400°C. When we measure the temperature of about 300–700°C and 600–900°C in the place where is abundant in gas, using the camcorder with the near-infrared and with the visible wavelength mode is better than the thermal infrared region, respectively.

Key words

Thermometersubmicron wavelengthNightShotred glowAso volcano