PROCEDURE FOR THE PRODUCTION OF A HUMIDITY-SENSITIVE INTERFERENCE MIRROR, AND PROCEDURE AND EQUIPMENT FOR THE MEASUREMENT OF THE HUMIDITY USING SAID MIRROR

摘要

Procedure for the production of a humidity- and/or vapour-sensitive interference mirror /edge filter/ or interference filter /band-pass filter/ and to a procedure and equipment for the measurement of the relative humidity and/or vapour concentration in air or in other gases and for the measurement of the variation of the relative humidity and/or vapour concentration. According to the invention, a light beam is produced by a narrow bandwidth light source, the light beam is at least once led through a humidity-and/or vapour-sensitive inteference mirror /edge filter/ or interference filter /band-pass filter/ directly or indirectly. The light beam having penetrated the humidity- and/or vapour-sensitive interference mirror /edge filter/ is detected, the detected signal is amplified and then directly or indirectly displayed. If the light beam is led through a humidity- and/or vapour-sensitive interference filter /band-pass filter/, the wavelength shift of the interference filter is measured by turning the interference filter until the maximum transmission is reached. The equipment according to the invention has a power supply unit and a narrow bandwidth light source connected in series,a humidity- and/or vapour-sensitive interference mirror /edge filter/ or a humidity- and/or vapour-sensitive interference filter /band-passfilter/ located in the path of the light beam produced by the narrow bandwidth light source. Further it has a light detector for detecting the light beam passing the humidity- and/or vapour-sensitive interference mirror or filter as well as an amplifier and a display unit connected in series with the output of the light detector. When employing a humidity- and/or vapour-sensitive interference filter /band-pass filter/, equipment according to the invention has an analog or digital maximum-setting unit connected between the amplifier and the display unit as well as an analog or digital voltage-to-angle converter, with the humidity- and/or vapour-sensitive interference filter forming a structural part of the latter. The invention also presents a procedure for producing a humidity- and/or vapour-sensitive interference mirror /edge filter/ or interference filter /band-pass filter/.