Dispersing Prisms

Material	BK7, UVFS, IRFS
Dimension tolerances	+0.0/-0,2 mm
Surface Quality	40-20 scratch & dig
Flatness	λ/4 at 632.8 nm
Angle tolerance	±2 arcmin
Design wavelength	780 nm
Coatings	None. Please refer to Coatings Section

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Description Metrology

A light ray is twice refracted passing through the prism. Deviation is a function of refractive index, and hence wavelength.

Altechna metrology lab applies following product inspection:

Visual inspection – surface quality evaluation according to MIL 13830 and ISO 10110 standards

Dimensions – measurement of geometrical dimensions, as diameter, thickness, etc.

Angle (Goniometer)*

Pyramidal error (Goniometer)

Flatness (Interferometer)

Wavefront distortion (Interferometer)

*(…) used equipment

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