Polarised Illumination
Optical Illumination Technique - Transmitted and Polarised Lighting
A polarising filter is an oriented crystal that transmits only the light that travels in a fixed direction. Polarised light doesn’t keep its polarisation when it diffusely reflects.
However, when polarised light specularly reflects, it keeps its polarisation. Using this principle, it is possible to use a polarising filter, with adjustable orientation, to remove specularly reflected light.
![](/Images/ss_microscope_glossary_l_polarized_illumination_001_2008154.png)
![](/Images/ss_microscope_glossary_l_polarized_illumination_002_2008155.png)
- A
- Light
- B
- Direction of transmission
- C
- Polarising filter
![](/Images/ss_microscope_glossary_l_polarized_illumination_003_2008156.jpg)
![](/Images/ss_microscope_glossary_l_polarized_illumination_004_2008157.jpg)