Brand: ThorLabs | Category: Scientific & Laboratory Equipment

High precision prisms that turn a beam through 90 degrees by total internal reflection at the hypotenuse, or retroreflect it through 180 degrees. They are a standard classroom demonstration of total internal reflection as well as a beam folding component.
| Parameter | Value |
|---|---|
| Specification | Sizes from 3 mm to 60 mm leg length |
| Materials | N-BK7, UV fused silica, calcium fluoride or zinc selenide |
| Surface quality | 40-20 scratch-dig (60-40 for CaF2 and ZnSe) |
| Surface flatness | lambda/10 at 633 nm for UV fused silica and N-BK7 |
| Clear aperture | 70% of face length and width |
| Specification | N-BK7 versions available with -A, -B or -C AR coatings on the hypotenuse or both legs |
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Phone: +8801805987890 | Email: info@vvon.com.bd
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High index prisms with a low Abbe number, used to disperse white light into a spectrum with less stray light than a grating and no higher diffraction orders. They are normally used at the minimum angle of deviation.
Diamond turned off-axis parabolas that focus a collimated beam or collimate a point source without spherical or chromatic aberration. The off-axis geometry moves the focus clear of the beam path, which is useful for spectroscopy and ultrafast work.
Air-spaced birefringent prism polarisers made from laser quality natural calcite, producing very pure linear polarisation. The ordinary ray leaves through a side port, so only the transmitted extraordinary beam should be used.