{"id":168,"count":0,"description":"When choosing a polariser it is normally a balance of several key considerations: cost, wavelength range, aperture size, acceptance angle, damage threshold, transmission efficiency, and extinction ratio.\r\n\r\nFor more information please read the section Polariser Selection \"Guide\" in our blog Polarisation & phase manipulation with retarders (waveplates)<\/a>\r\n\r\nPolarisers come in three main forms: Linear; Beam-splitting and Circular.\r\n\r\nLinear Polarisers\r\nIdeal linear polarisers transmit 100% of the light when the incoming light is polarised and aligned with the polarisation axis or 50% if the incoming light is unpolarised.\r\n\r\nThe ratio between the transmission of the desired polarisation direction and the undesired orthogonal polarisation direction is the contrast or extinction ratio.\r\n\r\nBeamsplitting Polarisers\r\nBeamsplitting polarisers separate the incoming unpolarised light into two (usually) orthogonally polarised beams. Most commonly this is done via birefringent crystals such as Calcite via beam splitting cubes or polarising prisms.\r\n\r\nOther beamsplitters such as wire grid polarisers contructed of a thin layer of aluminium microwires allow for durability, contrast and a wide field of view through to IR wavelengths.\r\n\r\nLaser 2000 offer laser line and broadband beamsplitters.\r\n\r\nCircular Polarisers\r\nMainly used for optical isolation with two main designs:\r\n\r\n1) Dichroic circular polarisers\/zero-order retarder\r\n2) Beamsplitting polariser\/zero-order retarder\r\n\r\nBoth designs take advantage of the handedness change of a circularly polarised beam upon reflection. By changing the handedness of the circularly polarised beam, back reflections are blocked by the polariser.","link":"https:\/\/stagingphotonics.laser2000.co.uk\/?product_cat=polarisers-polarising-prisms-beamsplitters","name":"Polarisers, Polarising Prisms and Beamsplitters","slug":"polarisers-polarising-prisms-beamsplitters","taxonomy":"product_cat","parent":166,"meta":[],"menu_order":0,"acf":[],"yoast_head":"\nPolarisers, Polarising Prisms and Beamsplitters - Laser 2000<\/title>\n<meta name=\"description\" content=\"Generate linear or circular polarised light or split light into its polarised components.\u00a0 We have dichroic, reflective, dielectric and birefringent.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Polarisers, Polarising Prisms and Beamsplitters\" \/>\n<meta property=\"og:description\" content=\"Generate linear or circular polarised light or split light into its polarised components.\u00a0 We have dichroic, reflective, dielectric and birefringent.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/stagingphotonics.laser2000.co.uk\/product-category\/light-delivery-and-control\/polarisation-phase-control\/polarisers-polarising-prisms-beamsplitters\/\" \/>\n<meta property=\"og:site_name\" content=\"Laser 2000\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"CollectionPage\",\"@id\":\"https:\\\/\\\/stagingphotonics.laser2000.co.uk\\\/product-category\\\/light-delivery-and-control\\\/polarisation-phase-control\\\/polarisers-polarising-prisms-beamsplitters\\\/\",\"url\":\"https:\\\/\\\/stagingphotonics.laser2000.co.uk\\\/product-category\\\/light-delivery-and-control\\\/polarisation-phase-control\\\/polarisers-polarising-prisms-beamsplitters\\\/\",\"name\":\"Polarisers, Polarising Prisms and Beamsplitters - 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