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Leg-Coated Right Angle Prism Mirrors
(L = 25.0 mm)
(L = 20.0 mm)
(L = 10.0 mm)
(L = 5.0 mm)
Thorlabs' Leg-Coated Right-Angle Prism Mirrors feature dielectric coatings on the two legs and offer a clear aperture greater than 70% of the face length and width. Note that this clear aperture does not include the beveled edge between the two legs. These prism mirrors are manufactured from N-BK7 and are offered with dielectric coating ranges of 400 - 750 nm or 750 - 1100 nm. Please see the Specs and Graphs tabs above for details on the reflectance of the two coatings.
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A leg-coated prism mirror can be used to create an optical delay line.
These mirrors can be used optical delay lines, which can be used to extend the path length in an optical system. They allow two counterpropagating beams to be made parallel with the output orthogonal to the input, as shown to the left. For applications which seek to split a beam orthogonally or combine two inputs into an orthogonal co-linear output, please view our knife-edge right-angle prisms.
While the hypotenuse is polished, these mirrors are not intended for use as retroreflectors due to the adhesion layers used in the coating process. For retroreflection applications we suggest the PS911K, an uncoated version of our right angle prisms, or our selection of mounted and unmounted retroreflectors. Thorlabs also offers a selection of hypotenuse-coated right-angle prism mirrors.
Additional leg sizes and coatings are available upon request. Please contact Tech Support with inquiries.
Right-Angle Prism Diagram
Right-Angle Prism Dimensions
These plots show the reflectance of our -E02 (400 - 750 nm) and -E03 (750 - 1100 nm) dielectric coatings for a typical coating run. The shaded region in each graph denotes the spectral range over which the coating is highly reflective. Due to variations in each run, this recommended spectral range is narrower than the actual range over which the optic will be highly reflective. If you have any concerns about the interpretation of this data, please contact Tech Support. For applications that require a mirror that bridges the spectral range between the dielectric coatings, please consider a metallic mirror.
-E02 Coating (400 - 750 nm)
-E03 Coating (750 - 1100 nm)
These broadband dielectric-coated right angle prisms are ideal for near-normal and 45° reflections. They perform well with both S- and P-polarized light over their specified wavelength range of 400 - 750 nm. For more information on the typical performance of these mirrors, please see the Graphs tab. For detailed specifications on each prism mirror, please see the Specs tab.
These broadband dielectric-coated right angle prisms are ideal for near-normal and 45° reflections. They perform well with both S- and P-polarized light over their specified wavelength range of 750 - 1100 nm. For more information on the typical performance of these mirrors, please see the Graphs tab. For detailed specifications on each prism mirror, please see the Specs tab.