Frequently Asked Questions

Littrow prisms are used in laser cavities where the wavelength of the return beam can be selected by tilting the prism slightly. In this way, the gain of the cavity can be tuned to a specific laser line.

The uncoated Littrow prism can disperse white light into its spectrum, while the coated Littrow prism diverts the beam at a 60-degree angle without inverting or reversing the image.

Yes, Littrow prisms can also be used as retro-reflecting Brewster prisms, as shown in the picture. They are positioned so that the beam which enters the front side of the prism suffers Brewster angle and falls normal to the flat surface and is reflected back along the same path.

The standard specifications of Littrow prisms include material BK7, dimension tolerances of +0.0, −0.2 mm, surface flatness of <λ/4 @ 632.8 nm, angle tolerance of +/- 10 arcmin, bevel of 0.4 mm × 45 deg, and surface quality of 40-20 scratch & dig.

Related products and accessories for Littrow prisms include Prism/Optics Mount, Universal Prism/Optics Mount, Two Angular Fine Adjustment Mounts, Three Angle Prism/Beamsplitter Table, Tilt/Rotation Stage, and Roll & Pitch Tilt Platform.

You May Also Like