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Equilateral dispersing prisms are used for wavelength separation applications. The three sides are of equal length. A light ray is twice refracted passing through the prism with total deviation denoted by qd in the figure below. Deviation is a function of refractive index, and hence wavelength. Angular dispersion Dqd is the difference in deviation for light rays having different wavelengths and varies with prism orientation.

  • Reflection losses are minimized for un-polarized rays traveling parallel to the base of the prism. This condition is called minimum deviation.
  • Minimum deviation occurs when the ray and wavelength angle of incidence at the entrance surface are equal to the angle of emergence (both angles measured with respect to the surface normal).
  • Antireflection coatings help reduce polarization at the prism surfaces by increasing total transmittance.

General Specifications:

Parameter Value
Material F2 glass
Dimension tolerance +/-0.2mm
Surface flatness l/2
Angle tolerance +/-3 arc min
Surface quality 60-40
Coating Optional

PN: TRA020
Description: Equilateral prism, F2, 20mm
Size: 20
Length: 20
Volume Price: Request Volume Quote

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