Linear Polarizer

What Is Linear Polarizer? How Does It Work?


Linear Polarizers are Polarizers designed to linearly split incoming light. Passing white light through a Linear Polarizer blocks half of the incident light, causing the electric field component to move so that it fluctuates in only one plane with respect to the direction of propagation. Linear Polarizers are ideal for a range of industrial, imaging, or research laboratory applications. Crossing Linear Polarizers radically reduces transmission, ideal for decreasing glare or stress testing. There are many Optics provides a wide selection of glass, plastic, or film Linear Polarizers for applications in the Visible or Infrared spectrum. The linear polarizer film is available in a variety of dimensions. Laminated film increases the film’s inflexibility, easing handling, or system integration.

How Does A Linear Polarizer Work?

A linear polarizer transfers light uniformly vibrating in a single plane while absorbing the orthogonal plane. If the vibrations are in one direction, the light is linearly polarized. There are two axes that are transmitting and absorbing. The transmitting axis is usually referred to as the polarizing axis. Light passing through a single polarizer loses at least 50% transmission, depending upon the grade of polarizer used and the polarization requirements. Crossing the two linear polarizer axes at 90 degrees to one another can produce near-absolute obstacle of light or cancellation. This is called extinction. The ratio of the transmission of two polarizers with axes parallel to axes crossed is known as the efficiency of the polarizer. Note that raising transmission does not always result in higher efficiency due to resultant increases in extinction transmission.

Advantages of 3D Polarizer

Linear polarizers are used in an extensive range of applications. A linear polarizer is an outstanding solution in applications that need glare reduction due to reflected light. Camera filters, sunglasses, and machine vision systems significantly benefit from the use of a linear polarizer. A linear polarizer can also be used to moderate the intensity of a light source. By placing two polarizers over top of each other and rotating one against the other, one can control the brightness. Airliner cabin windows and telescope filters are ideal applications. Here are some essential benefits of using a 3D polarizer.

  • Single-projector solution removes the chance of geometric unevenness between eyes
  • No vertical or horizontal parallax difficulties
  • Simple modulator placement and just set it in front of the projector
  • No time-consuming alignment of superimposed images mandatory
  • No moving parts
  • Less hardware than two-projector solutions
  • Does not need the use of a high power Infra-Red emitter
  • Passive eyewear is inexpensive