Device for calibrating measurement devices for quantitative infrared radiation measurement has metal cavity radiator with small downward-facing aperture, collimator below aperture at distance so its focal point is exactly in aperture center

摘要

The device is in the form of a standard for calibrating measurement devices for quantitative infrared radiation measurement and has a cavity radiator made of metal with a small downward-facing opening (2) acting as an aperture and a collimator (6) arranged below the aperture at a distance so that its focal point (27) lies exactly in the center of the aperture.