黒体でない物体の表面温度測定法

抄録

A portion of the surface at which the temperature t is to be measured and a cup-shaped cover constitutes a hollow space. The temperature θ of the inner surface of the cover is made to vary by electrical heating. The temperature of the surface is measured by a radiation thermometer through a small hole of the cover. Let the temperature thus obtained be τ. When θ=t, the walls of the hollow space are at an uniform temperature, and then, τ must be equal to t and θ. When θ≠t, it must be t_??_τ_??_θ, and if the temperature difference |t-θ| is small, it must be t-θ=k(τ-θ). Let τ=τ₁ when θ=θ₁, τ=τ₂ when θ=θ₂, ••••. The temperature t of the surface of non-black body is obtained on graphs, representing the relations between θ and τ and between τ and (τ-θ).