Broadband THz aqueous blackbody calibration source

Charles Dietlein; Zoya Popović; Erich Grossman

doi:10.1117/12.720165

1 May 2007 Broadband THz aqueous blackbody calibration source

Charles Dietlein, Zoya Popović, Erich Grossman

Proceedings Volume 6548, Passive Millimeter-Wave Imaging Technology X; 65480M (2007) https://doi.org/10.1117/12.720165
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

We describe a broadband calibration source for the millimeter-wave to terahertz (THz) frequency range, the Aqueous Blackbody Calibration (ABC) source. The blackbody in this design is a body of water, which is extremely absorptive at these frequencies, held by an expanded polystyrene (EPS) holder in a very specific shape, and kept at a uniform known temperature. The undesirable reflectance at the interfaces between the water and the walls of the EPS container is significantly reduced by the use of an "optical trap" geometry. The shape of the custom-molded container is designed so that all radiation incident within the entrance aperture and solid angle of the source undergoes two TE and two TM 45-degree reflections off the water-EPS interface. This ensures an effective emissivity > 98.5% over the operating band, and has been verified by measurements of EPS transmittance and geometric optics simulation over the entire band. In addition, the effective reflectance of the source is characterized at selected frequencies within the 0.1-2.0THz range.

Citation Download Citation

Charles Dietlein, Zoya Popović, and Erich Grossman "Broadband THz aqueous blackbody calibration source", Proc. SPIE 6548, Passive Millimeter-Wave Imaging Technology X, 65480M (1 May 2007); https://doi.org/10.1117/12.720165

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available