Effect of phasing-sector angular extent in FM reticles

Ronald G. Driggers; Carl E. Halford; Martin M. Meads; Glenn D. Boreman

doi:10.1364/AO.31.004578

Effect of phasing-sector angular extent in FM reticles

Ronald G. Driggers, Carl E. Halford, Martin M. Meads, Glenn D. Boreman

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

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.

Original language	English (US)
Pages (from-to)	4578-4581
Number of pages	4
Journal	Applied optics
Volume	31
Issue number	22
DOIs	https://doi.org/10.1364/AO.31.004578
State	Published - Aug 1992
Externally published	Yes

Keywords

Frequency modulation
Phase modulation
Reticles

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.31.004578

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title = "Effect of phasing-sector angular extent in FM reticles",

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.",

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language = "English (US)",

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T1 - Effect of phasing-sector angular extent in FM reticles

AU - Driggers, Ronald G.

AU - Halford, Carl E.

AU - Meads, Martin M.

AU - Boreman, Glenn D.

PY - 1992/8

Y1 - 1992/8

N2 - 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.

AB - 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.

KW - Frequency modulation

KW - Phase modulation

KW - Reticles

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Effect of phasing-sector angular extent in FM reticles

Abstract

Keywords

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