Thorlabs offers a diverse range of polarizers, including wire grid, film, calcite, alpha-BBO, rutile, and beamsplitting polarizers. Collectively, our line of wire grid polarizers offers coverage from the visible range to the beginning of the Far-IR range. Our nanoparticle linear film polarizers provide extinction ratios as high as 100 000:1. Alternatively, our other film polarizers offer an affordable solution for polarizing light from the visible to the Near-IR. Next, our beamsplitting polarizers allow for use of the reflected beam, as well as the more completely polarized transmitted beam. Finally, our alpha-BBO (UV), calcite (visible to Near-IR), rutile (Near-IR to Mid-IR), and yttrium orthovanadate (YVO4) (Near-IR to Mid-IR) polarizers each offer an exceptional extinction ratio of 100 000:1 within their respective wavelength ranges.

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The polarizing materials are designed and optimized for use within their operating range, denoted in the graphs below by the blue highlighted regions. Outside of this range, the performance of these polarizers' is not guaranteed. Care should be taken when cleaning and mounting these polarizers, as significant stress may cause performance variation. We recommend using compressed air to remove dust and debris.

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These polarizers may slightly diffuse the transmitted beam and are not recommended for imaging applications or applications that require the input divergence to be preserved. Similarly, they may not maintain the collimation of large input beams. The beam will walk as the polarizer rotates, so it is recommended to use these polarizers only when a single fixed polarization direction is needed. Rotation assemblies, like the one shown to the right, should be used only to set a fixed output angle.

To explore the available types, wavelength ranges, extinction ratios, transmission, and available sizes for each polarizer category, click More [+] in the appropriate row below.

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Thorlabs' film polarizers are designed to linearly polarize low-power beams of light. Each film polarizer is a square that can be left whole or cut to custom sizes. The polarization axis is marked with an arrow and is aligned to the flat edge of the LPVISE2X2, while the polarization axis of the LPNIRE2X2 and LPNIRE11S is noted by a sticker. There is a protective film on both sides of each polarizer that must be removed prior to use.

Light Meters are used to measure the light output of an illumination source for a number of optical applications. Light Meters are measurement devices that feature photodiodes to determine the level of light transmitted from a source. Light Meters possess simple, easy to read screens upon which measurements are displayed in one or more photometric units. Most Light Meters possess traceable NIST certification for proof of accuracy.

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Larger sizes of up to 24" x 39" are also available. To order a custom-sized film polarizer, please contact Tech Support. We also offer film polarizers with AR-coated windows epoxied on each side in Ø1/2", Ø1", and Ø2" sizes.

Spectrometers are used to measure the properties of light for a variety of applications including environmental or chemical analysis, fluorescence, or Raman. Spectrometers are optical instruments that can detect spectral lines and measure their wavelength or intensity. Spectrometers are ideal for determining compositional makeup for detecting weak light signals. Spectrometers can also be used to test the efficiency of an optical filter in order to determine whether a filter has properly blocked or transmitted specific wavelengths.

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Detectors are used to measure the illumination of a light source for a number of optical or spectrometry applications. Detectors consist of arrays of photodiodes or photodetectors that transmit electrical current when excited by collision from photons. Detectors enable the measurement of important light characteristics that are not conveniently acquired in other ways. A selection of photodiodes is also available with linked amplifier capabilities for easier, more precise measurement capacities.Detectors