IdealPhotonics' polarizer is an optical element that selectively transmits or reflects light waves with specific polarization directions. Its core function is to convert unpolarized or mixed-polarized light into linearly polarized light (or extract specific polarization components).By selectively controlling the polarization state of incident light through anisotropic structures (such as dichroic absorption, birefringence, or Brewster reflection), it achieves linearly polarized light output with a high extinction ratio (>10⁴:1) or polarization beam splitting functionality.