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  • High Extinction Plate Polarizer

Photonics Showcase
Jan 2011
CVI Melles GriotRequest Info
The Xsquared™ High Extinction Plate Polarizer (XEP) is a polarizing plate beamsplitter with an ultrahigh extinction ratio of 10,000:1. XEP high extinction polarizers are an ideal option for maximizing performance and minimizing alignment requirements by providing high extinction >10,000:1, moderate power tolerance >2 J/cm2 and easy beam alignment at 45°.


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An optical device for dividing a beam into two or more separate beams. A simple beamsplitter may be a very thin sheet of glass inserted in the beam at an angle to divert a portion of the beam in a different direction. A more sophisticated type consists of two right-angle prisms cemented together at their hypotenuse faces. The cemented face of one prism is coated, before cementing, with a metallic or dielectric layer having the desired reflecting properties, both in the percentage of reflection...
1. The near total absorption of plane-polarized light by a polarizer that has an axis perpendicular to the plane of polarization. 2. The decrease in the intensity of a diffracted beam resulting from the perfection or near-perfection of a crystal's structure.
extinction ratio
The ratio of the power of a plane-polarized beam that is transmitted through a polarizer placed in its path with its polarizing axis parallel to the beam's plane, as compared with the transmitted power when the polarizer's axis is perpendicular to the beam's plane.
With respect to light radiation, the restriction of the vibrations of the magnetic or electric field vector to a single plane. In a beam of electromagnetic radiation, the polarization direction is the direction of the electric field vector (with no distinction between positive and negative as the field oscillates back and forth). The polarization vector is always in the plane at right angles to the beam direction. Near some given stationary point in space the polarization direction in the beam...
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