Investigating relative material effects by characteristic wavelengths - ascertaining characteristic factors such as transmission, dispersion, reflection by spectrophotometry

摘要

A microcomputer (1) is connected to a control circuit (5) controlling drive stages (7) for radiation transmitters (8) of various spectra via a multiplexer (6). These transmitters are controlled sequentially and emit at least part of their radiation in the medium to be measured (4). Radiation receivers (9) convert at least part of the transmitted, dispersed or reflected radiation into an electrical value which is amplified (10) and extended to a measuring range charge-over switch (11). The latter is under the control of a control circuit (5) via the first microcomputer. This electrical value is also presented to a filter (12) as well as a sample-and-hold circuit (13) and an A-D converter (14) which are both subject to the control circuit. The microcomputer and a static RAM (15) are in parallel with the A-D converter. USE/ADVANTAGE - In industrial process or research to ascertain opacity, isobaric points and equilibrium dependent spectral sections. Sychronised alignment and detection of signals. Simple 380 point correction. Coupling to higher order computers.