Title: Radiation scanning system with two reflective drums rotating about parallel axes according to an equation

Abstract: In a radiation scanning system, scanning is achieved by rotation of two drums about parallel axes. The first drum is rotated at an angular speed s.sub.1 and has n.sub.1 reflective surfaces at a distance r.sub.1 from a first axis of rotation. The second drum is rotated at an angular speed s.sub.2 and has n.sub.2 reflective surfaces at a distance r.sub.2 from a second axis of rotation. The axes are separated by a distance d. A detector is located a distance a from the first axis. The following conditions hold: 2 a(n.sub.1 /n.sub.2 -1).sup.2 + 2 d(n.sub.1 /n.sub.2).sup.2 +r.sub.2 (n.sub.1 /n.sub.2).sup.2 =r.sub.1 (2n.sub.1 /n.sub.2 -1).sup.2 , (i) n.sub.1 s.sub.1 =n.sub.2 s.sub.2. (ii)

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Other info:

Inventors: Runciman, Herbert Morrison (Glasgow, SC, US)
Berry, Peter John (Glasgow, SC, US)

Application Number: 767282
Filing Date: 1977-02-09
Publication_date: 1978-04-04
Assignee: Barr & Stroud Limited (Glasgow, SC)
Primary Class(es): 359/201 250/236, 359/198, 359/218
Other Classes:
US Patent Ref:

3909105

Sep, 1975

Neiswander et al.

350/7.

Other Refs:
Primary Examiner: Henry, Jon W.
Assistant Examiner:
Attorney: Mason, Fenwick & Lawrence