Circular Polarizers

Hand holding polarizer filter making half of a quarter black | American Polarizers, Inc.

Film Circular Polarizers

Acrylic Circular Polarizer Len Filter | American Polarizers, Inc.

Glass Circular Polarizers

stack of 3 acrylic linear and circular polarizers | American Polarizers, Inc.

Acrylic Circular Polarizers

Filter all Circular Polarizers using the category images and titles above or the category filter below.

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Transmission
400-700nm
API Product #
Color
Substrate
Handedness
Surface
Finish
37%
(.010" thickness)
Neutral Grey
Film
Right
Glossy
37%
(.010" thickness)
Neutral Grey
Film
Left
Glossy
37%
(.035" thickness)
Neutral Grey
Film
Left
Glossy
37%
(.035" thickness)
Neutral Grey
Film
Right
Glossy
37%
(.035" thickness)
Neutral Grey
Film
Left
Glossy
42%
(.008" thickness) (High Extinction)
Neutral Grey
Film
Right
Glossy
42%
(.008" thickness) (High Extinction)
Neutral Grey
Film
Left
Glossy
22%
(.072", other thicknesses available)
Amber
Acrylic
Left
Non-Glare
17%
(.072", other thicknesses available)
Blue
Acrylic
Left
Non-Glare
6%
(.072", other thicknesses available)
Green
Acrylic
Left
Non-Glare

API's Circular Polarizers


API’s circular polarizing filters are optimal for display, camera, and sensor applications where sensitivity to linearly polarized light is an issue, but glare reduction is required. Circular polarization is also used in passive 3D applications as an alternative to a linear polarizer filter.

API circular polarizers combine a linear polarizer and a quarter wave plate. We offer standard circular polarized products or custom laminations to meet your design needs.  Our 50+ years of experience of making polarized filters allow us to produce a circular polarizer that has excellent glare reduction, high resolution, and very good environmental stability for all your optical filter and imaging requirements.

  • Visible light, near IR and UV spectrum

  • Multiple colors and transmission values

  • Available in film and acrylic or glass laminations

  • In-stock or custom shapes and sizes

  • Optional anti-reflective, anti-glare hard coatings, and clear hard coatings

  • Custom circular polarizing optical filters


Want to learn more? See how circular polarization works.
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