A compact Fourier transform imaging spectrometer employing a variable gap Fabry-Perot interferometer

Paul G. Lucey; Jason Akagi; Adam L. Bingham; John L. Hinrichs; Edward T. Knobbe

doi:10.1117/12.2050826

21 May 2014 A compact Fourier transform imaging spectrometer employing a variable gap Fabry-Perot interferometer

Paul G. Lucey, Jason Akagi, Adam L. Bingham, John L. Hinrichs, Edward T. Knobbe

Proceedings Volume 9101, Next-Generation Spectroscopic Technologies VII; 910110 (2014) https://doi.org/10.1117/12.2050826
Event: SPIE Sensing Technology + Applications, 2014, Baltimore, MD, United States

Abstract

Fourier transform spectroscopy is a widely employed method for obtaining visible and infrared spectral imagery, with applications ranging from the desktop to remote sensing. Most fielded Fourier transform spectrometers (FTS) employ the Michelson interferometer and measure the spectrum encoded in a time-varying signal imposed by the source spectrum interaction with the interferometer. A second, less widely used form of FTS is the spatial FTS, where the spectrum is encoded in a pattern sampled by a detector array. Recently we described using a Fabry-Perot interferometer, with a deliberately wedged gap geometry and engineered surface reflectivities, to produce an imaging spatial FTS. The Fabry-Perot interferometer can be much lighter and more compact than a conventional interferometer configuration, thereby making them suitable for portable and handheld applications. This approach is suitable for use over many spectral regimes of interest, including visible and infrared regions. Primary efforts to date have focused on development and demonstration of long wave infrared (LWIR) spectral imagers. The LWIR version of the miniaturized Fabry-Perot has been shown to be effective for various applications including spectral imaging-based chemical detection. The compact LWIR spectral imager employs uncooled optics and a microbolometer camera; a handheld version is envisioned for future development. Recent advancements associated with the spatial Fourier Transform imaging spectrometer system are described.

Citation Download Citation

Paul G. Lucey, Jason Akagi, Adam L. Bingham, John L. Hinrichs, and Edward T. Knobbe "A compact Fourier transform imaging spectrometer employing a variable gap Fabry-Perot interferometer", Proc. SPIE 9101, Next-Generation Spectroscopic Technologies VII, 910110 (21 May 2014); https://doi.org/10.1117/12.2050826

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