We have measured, using a custom setup, the emissivity of metallic wire-grids, suitable for polarimeters and interferometers at mm and far infrared wavelengths. We find that the effective emissivity of these devices is of the order of a few %, depending on fabrication technology and aging. We discuss their use in astronomical instruments, with special attention to Martin–Puplett Interferometers in low-background applications, like astronomical observations of the Cosmic Microwave Background.
On the emissivity of wire-grid polarizers for astronomical observations at mm-wavelengths / Schillaci, Alessandro; Battistelli, Elia Stefano; D'Alessandro, Giuseppe; DE BERNARDIS, Paolo; Masi, Silvia. - In: INFRARED PHYSICS & TECHNOLOGY. - ISSN 1350-4495. - STAMPA. - 58:(2013), pp. 64-68. [10.1016/j.infrared.2013.01.009]
On the emissivity of wire-grid polarizers for astronomical observations at mm-wavelengths
SCHILLACI, ALESSANDRO;BATTISTELLI, Elia Stefano;D'ALESSANDRO, GIUSEPPE;DE BERNARDIS, Paolo;MASI, Silvia
2013
Abstract
We have measured, using a custom setup, the emissivity of metallic wire-grids, suitable for polarimeters and interferometers at mm and far infrared wavelengths. We find that the effective emissivity of these devices is of the order of a few %, depending on fabrication technology and aging. We discuss their use in astronomical instruments, with special attention to Martin–Puplett Interferometers in low-background applications, like astronomical observations of the Cosmic Microwave Background.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.