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Measurement of Weissenberg films with a computer‐controlled drum microdensitometer
Author(s) -
Sjölin L.,
Olsson G.,
Lindqvist O.
Publication year - 1975
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889875011594
Subject(s) - microdensitometer , drum , fortran , optics , materials science , set (abstract data type) , computer science , computer graphics (images) , physics , engineering , mechanical engineering , programming language , operating system
A set of Fortran programs has been written for the on‐line measurement of Weissenberg films with a rotating‐drum microdensitometer, interfaced to a small computer. The minimum memory capacity required is 8K 16‐bit words, but the evaluation speed can be increased from about 10 to about 30 reflexions/min if a 12K or 16K memory is used. The crystal structures determined from data obtained with the system have refined to R = (Σ| F o − | F c || /Σ F o ) values of 0.06–0.07.