. The Bell System technical journal . Fig. 29 Fig. 30 Analysis of the aperture The instantaneous amount of hght passing through the aperture is n+Tl2 F{t) = f ^{h)mdt >t+Ti2 (piti)dti I A{i>)) cos [/iW + $(w)]t+Tl2 = 1 A{ix!)dw I (^(/i) cos [/loj + ^{oi)~\dti. In the case of the rectangular aperture ip{ti) — a constantand, except for a neghgible constant factor, /»oo r*t-\-Tl2 F{t) = I A(u)do} I cos [/ico + $(co)]rf/i Jo h- TI2 (3) sin \{t - r/2)co + cJ(co)] /»oo (4) sin 7co/2 cos [/co + $(w)]](/co. The transformation from f{t) to F{t) amounts merely to changing the relative amplitude of
. The Bell System technical journal . Fig. 29 Fig. 30 Analysis of the aperture The instantaneous amount of hght passing through the aperture is n+Tl2 F{t) = f ^{h)mdt >t+Ti2 (piti)dti I A{i>)) cos [/iW + $(w)]t+Tl2 = 1 A{ix!)dw I (^(/i) cos [/loj + ^{oi)~\dti. In the case of the rectangular aperture ip{ti) — a constantand, except for a neghgible constant factor, /»oo r*t-\-Tl2 F{t) = I A(u)do} I cos [/ico + $(co)]rf/i Jo h- TI2 (3) sin \{t - r/2)co + cJ(co)] /»oo (4) sin 7co/2 cos [/co + $(w)]](/co. The transformation from f{t) to F{t) amounts merely to changing the relative amplitude of the Fourier components of f{t) by a factor sin Twllproportional to . PRODUCTION OF TELEVISION SIGNALS 603 In the case of the circular aperture we can divide the aperture upinto narrow elements parallel to the direction of motion, as shownin Fig. 30. Elements at a distance h from the middle line of thestrip have lengths 2h = 2 VrV4 - K\ (5) Each element considered as an independent rectangular aperture
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
