Resolution-Equivalent D-Asterisk For Sprite Detectors

    Authors

    P. Fredin;G. D. Boreman

    Comments

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    Abbreviated Journal Title

    Appl. Optics

    Keywords

    INFRARED DETECTORS; D-ASTERISK; MODULATION TRANSFER FUNCTION; SPRITE; MODULATION-TRANSFER-FUNCTION; Optics

    Abstract

    It is desirable for design purposes to model a signal-processing-in-the-element (SPRITE) detector simply as a discrete-element detector with an integration-enhanced D*. We present a method for normalization of measured D* for SPRITE detectors to yield an equivalent-discrete D*. The multiplicative factor is the square root of the ratio of two noise-equivalent bandwidths: one is that of the SPRITE detector with no boost filter, and the other is that of the SPRITE detector with a boost filter that approximately compensates for carrier diffusion, yielding a spatial resolution that approaches that of a discrete detector the same size as the readout. This approach allows a resolution-equivalent D* comparison of SPRITE detectors with discrete-element detectors and facilitates such comparisons among SPRITE detectors. We find that, to obtain the D* of an equivalent-discrete detector, a measured SPRITE D* should typically be multiplied by a factor ranging from 0.85 to 0.57 for 8- to 12 mu m SPRITE detectors and by a factor ranging from 0.50 to 0.23 for 3- to 5-mu m SPRITE detectors.

    Journal Title

    Applied Optics

    Volume

    34

    Issue/Number

    31

    Publication Date

    1-1-1995

    Document Type

    Article

    Language

    English

    First Page

    7179

    Last Page

    7182

    WOS Identifier

    WOS:A1995TC98300002

    ISSN

    0003-6935

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