Scanning equipment
Updated 24 Dec 2004

One of the best articles which can be cited to cover the subject of scanning is that published in the Bell System Technical Journal by P. Mertz and F. Gray (see below).
A carefull study of this article would repay any one who is interested in the genaral subject of scanning at that time.
A companion facsimile symposium paper, prepared by Messr. Whitaker and Artzt (see below), consists of a summary of the problems involved in the design of scanner circuits.
In addition to a general coverage of the subject, photo-electric scanning of facsimile tape-subject slip is touched on sufficiently well for a general understanding of the problems involved.


The principle of facsimile transmission. The photocell responds to changes in the reflected light beam to produce signals proportional in strength to the amount of light reaching it. (Courtesy of Times Facsimile Corporation.)

A detailed breakdown of the scanning system follows, with a representative group of Dokuments listed for each division.

P. Mertz & F. Gray (Bell Sys. Tech. Jl., Vol. 13, pp. 464-515, July, 1934, P. Mertz & F. Gray).

Whitaker & Artzt ( RCA Institutes Technical Press, Radio Facsimile; pp. 229-247. J. N. Whitaker & M. Artzt).

(C) Marius Rensen

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