Kingsview can supply polarising filters in either plastic sheet or full dielectric coating. The plastic sheet option can be cut to whatever shape you need. The sheet can also be antireflection coated to your specific requirements. It is also possible to sandwich the sheet between between glass to custom shapes. and sizes.
The dielectric option enables the coating to be put directly on glass such as windows or lenses. The coating can be tailor made to your exact wavelength and angle of incidence requirements.
If you have a requirement such as this please get in touch to discuss.