Sensor for monitoring medium in optical path between electromagnetic radiation source e.g. luminescent diode and charge coupled device (CCD) sensor, detects spectrum change by alteration of mediums arranged in optical path

摘要

The sensor has a housing (5) that accommodates an electromagnetic radiation source such as luminescent diode (1) and an electromagnetic radiation detector such as CCD sensor (2). Two planar and angular wall portions arranged within the housing, are transparent to electromagnetic radiation such that the wall portions and the mediums located at the wall portions are equipped with the electromagnetic radiation breaking prisms. A linear sensor with photodiodes is arranged beyond the CCD sensor, to detect the spectrum change by alteration of mediums.