Buchi N-500 NIRFlex - Transmission Mode; Diffuse Transmission Mode

4 Description of function
23
NIRFlex N-500 Operation Manual, Version G
4.2.3 Transmission mode
NIR light is sent through a defined pathlength of sample material (e.g. in a cuvette). The transmitted
light contains the spectral information. This is the preferred method for testing liquids.
Detector
Cuvette
NIR light
pathlength
4.2.4 Diffuse transmission mode
The diffuse transmission mode is a mixture of “diffuse reflection” and “transmission” mode.
The NIR light penetrates the sample:
• is refracted
• diffusely reflected
• diffusely transmitted
The transmitted rays contain the spectral information of the sample.
Detector
NIR light
Sample
Collecting lens