An automatic recording microdensitometer
- 1 December 1955
- journal article
- Published by IOP Publishing in Journal of Scientific Instruments
- Vol. 32 (12) , 457-460
- https://doi.org/10.1088/0950-7671/32/12/301
Abstract
The paper describes an automatic recording microdensitometer based on the Dobson splitbeam type of instrument, using a single lamp and single photocell. The shutter is driven at a non-synchronous speed and an electromechanical transducer is used to convert the output to a synchronous frequency. This output is used to operate a servomechanism which moves a straight photographic wedge and also a potentiometer. The output from the potentiometer drives a standard pen recorder. The fim carriage has movements of 28.5 cm and 12.5 cm in perpendicular directions and accurate measurements of these displacements can be read on scales permanently in place.Keywords
This publication has 3 references indexed in Scilit:
- A servo-controlled microdensitometer for X-ray diffraction photographsJournal of Scientific Instruments, 1955
- A recording microdensitometer applicable to biological problemsJournal of Scientific Instruments, 1953
- A flicker type of photo-electric photometer giving high precisionProceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1923