Right-Angle Prism

Material	BK7, UVFS, IRFS
Dimension tolerances	+0/-0,2 mm
Surface Quality	40-20 scratch & dig
Flatness	λ/4 at 633 nm
Clear Aperture	>80% of the face size
90 deg angle tolerance	±2 arcmin (general type) ±5 arcsec (precision type)
Pyramidal tolerance	±1 arcmin (general type) ±30 arcsec (precision type)
Coatings	None. Please refer to Coatings Section

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Description Metrology

The right angle prisms are often preferable to an inclined mirror in applications involving severe acoustic or inertial loads, because they are easier to mount, and deform much less than mirror in response to external mechanical stress. As long as acceptance angle limitations for TIR from the roof faces are not exceeded, the right angle prisms can serve as a retro reflector, turning beams back to the original direction.

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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Angle tolerance	Dimensions A x B x C, mm	Material	Product ID	Price	Action

General type	12.5 x 12.5 x 12.5	BK7	1-PR-1-0125	16 €
General type	20.0 x 20.0 x 20.0	BK7	1-PR-1-0200	26 €
General type	25.0 x 25.0 x 25.0	BK7	1-PR-1-0250	32 €
Precision type	12.5 x 12.5 x 12.5	BK7	1-PR-1-1125	38 €
Precision type	20.0 x 20.0 x 20.0	BK7	1-PR-1-1200	54 €
Precision type	25.0 x 25.0 x 25.0	BK7	1-PR-1-1250	64 €
General type	12.5 x 12.5 x 12.5	UVFS	1-PR-2-0125	28 €
General type	20.0 x 20.0 x 20.0	UVFS	1-PR-2-0200	46 €
General type	25.0 x 25.0 x 25.0	UVFS	1-PR-2-0250	58 €
Precision type	12.5 x 12.5 x 12.5	UVFS	1-PR-2-1125	52 €
Precision type	20.0 x 20.0 x 20.0	UVFS	1-PR-2-1200	72 €
Precision type	25.0 x 25.0 x 25.0	UVFS	1-PR-2-1250	90 €