Infrared microspectroscopy with synchrotron radiation

G. Lawrence Carr; Gwyn P. Williams

doi:10.1117/12.290262

16 October 1997 Infrared microspectroscopy with synchrotron radiation

G. Lawrence Carr, Gwyn P. Williams

Proceedings Volume 3153, Accelerator-Based Infrared Sources and Applications; (1997) https://doi.org/10.1117/12.290262
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Infrared microspectroscopy with a high brightness synchrotron source can achieve a spatial resolution approaching the diffraction limit. However, in order to realize this intrinsic source brightness at the specimen location, some care must be taken in designing the optical system. Also, when operating in diffraction limited conditions, the effective spatial resolution is no longer controlled by the apertures typically used for a conventional (geometrically defined) measurement. Instead, the spatial resolution depends on the wavelength of light and the effective apertures of the microscope's Schwarzchild objectives. We have modeled the optical system from the synchrotron source up to the sample location and determined the diffraction-limited spatial distribution of light. Effects due to the dependence of the synchrotron source's numerical aperture on wavelength, as well as the difference between transmission and reflection measurement modes, are also addressed. Lastly, we examine the benefits (when using a high brightness source) of an extrinsic germanium photoconductive detector with cone optics as a replacement for the standard MCT detector.

Citation Download Citation

G. Lawrence Carr and Gwyn P. Williams "Infrared microspectroscopy with synchrotron radiation", Proc. SPIE 3153, Accelerator-Based Infrared Sources and Applications, (16 October 1997); https://doi.org/10.1117/12.290262

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