Lock-in imaging of multicycle integration focal plane array

Lock-in imaging using multicycle integration focal plane array (MIFPA) is demonstrated to detect extremely weak image and/or spectroscopic signals. Each pixel of the MIFPA has a correlated multicycle integrator to play the roles of lock-in’s phase-sensitive detector and low-pass filter. In lock-in i...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2002-01, Vol.73 (1), p.11-17
Main Authors: Chin, Ken K., Ou, Haijiang
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Lock-in imaging using multicycle integration focal plane array (MIFPA) is demonstrated to detect extremely weak image and/or spectroscopic signals. Each pixel of the MIFPA has a correlated multicycle integrator to play the roles of lock-in’s phase-sensitive detector and low-pass filter. In lock-in imaging, the signal current is accumulated while the dark or background current is canceled. As a result, the total integration time is increased by several orders, which is equivalent to the reduction of bandwidth by several orders. All advantages associated with the lock-in amplifier are achieved by imaging with MIFPA. Key issues of the MIFPA technology, including the design and performance of the correlated multicycle integrator, are discussed.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1426232