Pentaprism
Penta prism can deviate an incident beam without inverting or reversing to 90°.The deviation angle of 90° is independent of any rotation of the prism about an axis parallel to the line of intersection of the two reflecting faces. It is commonly used in Plumb Level, Surveying, Alignment, Range finding and Optical Tooling. The reflecting surfaces of this Prism must be coated with a metallic or dielectric coating. The standard Penta Prism reflecting surfaces are coated with aluminum or enhanced aluminum. By adding a wedge and with partial reflective coating on first reflective surface,Penta Prism can be used as Beamsplitter.We supply Beamsplitter Penta Prism with standard Transmission/reflection (T/R) ratio of 20/80,50/50.Other T/R ratio is available upon request. Note for Penta Prism: Besides H-K9L glass, other optical glass is available for custom-made Penta Prisms. Penta Prism at bigger size is available. Typical deviation tolerance is 1 minute, better precision such as 30 sec, 10 sec, 5 sec., 3sec., 1sec., 0.5secis available. Typical reflection is >90% by Al coating, other metal coating such as Ag, Cu, or High Reflection Dielectric Coating is available. Typical Beam splitting Ratio T/R is 20/80±5% or 50/50±5%, other Ratio is available.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material [Typical Tolerance / High Precision] | H-K9L Grade A optical glass |
| Dimension Axh [Typical Tolerance / High Precision] | 2.5x2.5 ～ 50.0x50.0 |
| Dimension Tolerance [Typical Tolerance] | ±0.2 (General) |
| Dimension Tolerance [High Precision] | ±0.05 (High Precision) |
| 90° Deviation Tolerance [Typical Tolerance] | <1 arcmin (General) |
| 90° Deviation Tolerance [High Precision] | <0.5 arcsec (High Precision) |
| Flatness @633nm [Typical Tolerance；633nm；@633nm] | λ/2 (General) |
| Flatness @633nm [High Precision；633nm；@633nm] | λ/4 (High Precision) |
| Surface Quality [Typical Tolerance] | 60/40 (General) |
| Surface Quality [High Precision] | 20/10 (High Precision) |
| Reflection Coating [Typical Tolerance / High Precision] | R>90% |
| Splitting Ratio(T/R) [Typical Tolerance / High Precision] | 20/80±5% or 50/50±5% |
| AR Coating [Typical Tolerance / High Precision；400-700nm] | R<0.5%@400-700nm |
Datasheet
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Supplier Information
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