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Penta Prism

Featured Product from Avantier Inc.

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Features:
- Reflections in penta prisms are achieved through coatings rather than total internal reflection.
- Penta prisms variations include half penta prisms and roof penta prisms.
- Avantier uses advanced metrology equipment to measure accuracy.
- Standard series penta prisms have a deviation tolerance of less than 10 arc seconds and a flatness of l/2 l @ 632.8 nm.
- Precision series penta prisms have a deviation tolerance of no more than 2 arc seconds and a flatness of up to l/4 l @ 632.8 nm.
- Surface quality of the standard line is 60-40 scratch and dig.
- Penta prisms are available in BK7 Grade A optical glass, Corning Fused Silica 7980, JGS1, and JGS2.
- BK7 Grade A optical glass is an all-purpose substrate with high refractive index homogeneity.
- Corning Fused Silica 7980 is a colorless substance with low thermal expansion, suitable for ultraviolet transmission.
- JGS1 is high-quality ultraviolet grade fused silica with intense OH absorption, suitable for deep UV and visible ranges.
- JGS2 is similar to JGS1 but may contain bubbles or inclusions, better suited for non-sensitive applications.

Factory Standard

Material: BK7 Grade A optical glass, Corning Fused Silica 7980, JGS1, JGS2
Dimension Tolerance: +/-0.1mm
90 Deviation Tolerance: Precision series: up to 2 arc seconds
Flatness: Precision series: 1/4 l at 632.8 nm
Reflectivity: R > 95% per face from 630 to 680 nm
Surface Quality: 60-40 scratch and dig
Coating: On request