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Prisms |
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| BK7
Prisms There are many types of prism, each having a particular geometry to achieve the desired reflections necessary to perform a specific imaging task. Reflecting prisms may invert, rotate, deviate or displace a beam. Dispersing prisms produce spectral separation for spectroscopic applications or for tuning a laser output. We provides many kinds of high precision prisms, including Penta Prism, Beamsplitter Penta Prism, Right Angle Prism, and Corner Cube. Our micro Penta Prism and Right Angle Prism are widely used in optical communication, such as optical switches. Dove Prism and Roof Prism are also available upon request. |
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It¡¯s necessary to alter or manipulate the source¡¯s polarization. For example, a reflective phase retarder converts linear to circular polarization and improves the laser cutting quality. However, most polarization altering devices: the reflective phase retarder and waveplates
are very wavelength sensitive and offer only narrowband, or single wavelength operation. The Fresnel prisms and rhombs described on this page utilize the principle that when light undergoes total internal reflection, there is a relative phase change between the s and p polarization components. This effect is only weakly dependent on wavelength (Figure 1). As a result, these components are ideal for those working at either multiple distinct wavelengths or with broadband sources in the 8 to 12 µm region. By manipulating the rhomb¡¯s geometry, devices which produce quarter-wave, half-wave, or virtually any required retardation can be constructed. Please contact our sales representative with your design requirements. |
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Figure 1 |
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This quarter-wave prism converts linear into circular polarization, and turns the beam path. |
This quarter-wave rhomb produces an output beam which is parallel, but displaced from, the input. | This half-wave rhomb changes the polarization¡¯s orientation for a linearly polarized input. The output polarization orientation is varied by rotating the rhomb around the optical axis. The output beam is parallel to, but displaced from, the input beam. | ||||||||||||||||||||||||||||||
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