Why is no IR signal detected on my Bruker Microscope?
- JJill ParkerAug 2, 2025
Several factors can cause a low or absent IR signal. It could be due to using the 4x objective (not suitable for IR spectroscopy), high detector temperature (for MCT detectors, cool it with liquid nitrogen), incorrect mode (activate IR mode), wrong transmission/reflection mode (select the correct one), detector oversaturation (reduce IR signal intensity using apertures or beam attenuator), beam blockage (remove sample or use a mirror), VIS polarizer in the beam path (remove it), blocked apertures (open them), small aperture diameter in OPUS (select the largest), or incorrect measurement channel/detector selected in OPUS (select the appropriate settings).