Bare Uncemented Mica Quater & Half Wave Retarder
Muscovite Sheet Mica of ASTM (D-351-97) V-I, having an even surface that is optically flat, transparent, scratch-less, and free from fingerprints, is specially used for Broadband Wave plates or Retardation Plates.
Mica has excellent polarization properties including a very high extinction ratio and transmitting efficiency and helps to reduce light transmission in the above applications. Mica also exhibits extremely broadband transmission performance, and these mica wave plates can be operated with a high degree of retardation accuracy over a broad wavelength range.
A&R Mica is one of the world’s largest manufacturers and stockists of the finest quality MICA components used in Laser Industries and has an unsurpassed capability to meet the exact requirements of customers.
These useful broadband wave plates are manufactured by cleaving crystalline sheet mica into quarter, half, and full wave plates to achieve precise first-order retardation at 550mm wavelength. These are useful throughout the visible spectrum from 400 to 700nm. The single Mica Disk is sandwiched between optical glass disks for protection on both sides and is oriented so that the optical axes are orthogonal. These broadband mica wave plates are produced in many diameter sizes of varying thicknesses. Mica has birefringent properties, which means that it can split and divide unpolarized incident light into two orthogonal linearly polarized beams at different velocities. One beam transmits straight through, the second precisely separated by 90o. Beam-splitting polarizers are used after the generation of the laser and different degrees of retardation are produced by mica wave plates.
