Pyrometer including an emissivity meter

Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen

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219502, 219 8512, 374128, 374 9, 374 13, 374131, 374141, G01J 508, G01J 506, G01N 2500

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active

054604516

ABSTRACT:
A pyrometer for measuring thermal radiation and emissivity for both diffusely and specularly reflecting surfaces of an object which includes, a thermal radiation detector and an optical system connected to the detector for concentrating thermal radiation originating from an object surface area on the detector, an emissivity meter connected to the optical system, the meter further comprising a radiation source supplying measuring radiation and a measuring radiation detector, an optical integrator adjacent to the object surface area arranged in the radiation path of the measuring radiation between the radiation source and the measuring radiation detector, wherein the radiation source extends through an aperture of the optical integrator and diffusely irradiates the object surface, and a shield connected to the optical integrator for preventing measuring radiation from irradiating the object surface area directly, is described. A laser processing apparatus provided with such a pyrometer and a method of controlling the temperature of a surface with the pyrometer are also described.

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Krapez, J. C. et al., "A double-wedge reflector for emissivity enhanced pyrometry," Meas. Sci. Technol. 1, pp. 857-864 (1990).
"Der Pyrolaser" R. Porter, Sensor Magazine No. 3, 1990, pp. 13-17.

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