There are many types of optical filters used in machine vision systems.Normally, The main types include NarrowBandpass filter, IR filters, Shortpass Filters, Longpass filters,UV filters and also polarizers…etc. The optical filters selection depends entirely on the specific application requirements.
The functions of Machine vision Filter are as follows：
- Visible light(VIS) filters for routine inspection tasks
- IR filters, also called Near-Infrared (NIR) Filters enable material penetration or night vision imaging
- IR cut-off filters, also called Short-wave infrared (SWIR) filters for component analysis
- Ultraviolet (UV) Filters detect fluorescence or special markings
- Narrow Bandpass Filters ensure high precision detection by isolating specific wavelengths
- Longpass Filters, also called Long-Wave Infrared (LWIR) Filters are essential for thermal imaging.
- The polarizing filter，LPL or CPL filters are used to address the issues of reflection and glare in machine vision.
By making the appropriate selection, optical filters can significantly enhance the performance and capabilities of a machine vision system.
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