Figure 1 shows the components of the measuring apparatus for recognizing and locating emotions and thoughts by measuring the infrared pulse radiation in the sequence of the measured value preprocessing: localization tube 1 infrared detector 2 amplifier 3 analogue/digital conversion 4 analysis program 5 and display 6 wherein the components of the measuring apparatus have the following features: the localization tube 1 records only the infrared pulses which are emitted by a small surface and are produced by changes in the body heat of a creature partially repeatedly reflects said infrared pulses at the inner wall and focuses said pulses on the infrared detector 2 the infrared detector 2 which is designed to be able to receive only AC voltage signals and not DC voltage signals converts the infrared beams into electrical signals the amplifier 3 amplifies these signals the signals are digitized during the analogue/digital conversion 4 the analysis program 5 creates time signals absolute value spectra and differential spectra for the total measuring time or for time sections for different mental states of the creature being investigated and creates a characteristic mental spectrum in the pulse frequency range of approximately 0.01 to 10 Hz the results for the different mental states of the creature being investigated can be seen on the display 6 and can be compared with the result that different emotions such as joy or sorrow can be recognized for example. In addition to the measuring apparatus it is possible to use a transmitter which flashes on a small body surface and the light pulses from which contain infrared components. This has the advantage of amplifying pulse frequencies which have already occurred and of allowing the pulse frequencies which have not yet appeared during mental activity to emerge.
