Effect Of Phasing-Sector Angular Extent In Fm Reticles

    Authors

    R. G. Driggers; C. E. Halford; M. M. Meads;G. D. Boreman

    Comments

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    Abbreviated Journal Title

    Appl. Optics

    Keywords

    RETICLES; FREQUENCY MODULATION; PHASE MODULATION; Optics

    Abstract

    A technique is presented for increasing the useful power of the FM modulation signal from a spinning FM reticle with a phasing sector. Spinning FM reticles often determine a target location by using a combination of a phasing sector to establish the angular target location and a radial frequency variation to establish the radial target location. Typically, the phasing sector of this reticle type consists of a semicircular transmissive sector with the other semicircular sector which provides FM modulation. The power of the FM modulation signal is increased by matching the phased-sector geometry to the size that corresponds to the period of the modulation frequency. This type of reticle is compared and contrasted with the more typical semicircular phasing-sector reticle in both the time and frequency domains.

    Journal Title

    Applied Optics

    Volume

    31

    Issue/Number

    22

    Publication Date

    1-1-1992

    Document Type

    Article

    Language

    English

    First Page

    4578

    Last Page

    4581

    WOS Identifier

    WOS:A1992JF91400046

    ISSN

    0003-6935

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