Optimal signal-to-noise ratios for soft x-ray lensless imaging

Journal Article · Wed Feb 24 00:00:00 EST 2010 · Optics Letters

OSTI ID:972679

Rick, R

We propose and demonstrate a method to gauge and optimize the signal-to-noise ratios (SNRs) in lensless imaging using partially coherent sources. Through spatial filtering we tuned the coherence width of an incoherent soft x-ray undulator source, and we deduce that there exists an optimal spatial filter setting for imaging micrometer-sized objects, while high-resolution imaging is best executed without spatial filtering. Our SNR analysis, given spatial coherence, allows for an estimation of the required exposure time at synchrotron sources and pulse fluence at x-ray laser sources.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 972679
• Report Number(s): SLAC-REPRINT-2010-012; OPLEDP; TRN: US1001488
• Journal Information: Optics Letters, Vol. 34, Issue 5; ISSN 0146-9592
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
SIGNAL-TO-NOISE RATIO
SYNCHROTRONS
WIGGLER MAGNETS
X-RAY LASERS
MATSCI