Background Suppression in Double-Beam Interferometry Using Tailored Modulation Transfer Functions

An optical background suppression technique is described in which the lower spatial frequencies of a background field are effectively suppressed, thereby enhancing the detectability of point-like targets. The technique is particularly applicable for use in image-forming double-beam interferometers i...

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Bibliographic Details
Main Authors: Zehnpfennig,T F, Vanasse,G A
Format: Report
Language:English
Subjects:
BACKGROUND RADIATION
BEAM SPLITTING
INTERFEROMETERS
MODULATORS
Optical Detection and Detectors
Optics
PE61102F
SUPPRESSION
TARGET DETECTION
TARGET DISCRIMINATION
TRANSFER FUNCTIONS
WUAFGL2310G101
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Description
Summary:An optical background suppression technique is described in which the lower spatial frequencies of a background field are effectively suppressed, thereby enhancing the detectability of point-like targets. The technique is particularly applicable for use in image-forming double-beam interferometers in which the individual detector elements are matched to the diffraction-limited resolution of the instrument. The technique utilizes pairs of optical systems whose modulation transfer functions are suitably matched and a number of these pairs are described. (Author)