The PLX Hollow Beamsplitting Pentamirror™ (HBPM) provides the performance of a pentamirror while generating multiple output beams. The assembly is invariant and features accuracies to better than 1 arc second. 


- Performance of a pentamirror with better accuracy and greater wavelength transmission.

- Provides multiple outputs at 90 degrees from one another.

- Invariant assembly permits movements without compromising deviation or accuracy.

- Accuracies to better than 1 arc second.

- RoHS Compliant.

- PLX is a ISO 9001 registered company.


Related Products:

- PLX Hollow Penta Mirror and Penta Mirror Roof Assemblies

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PLX Hollow Beamsplitting Pentamirror (HBPM).

The Hollow Beamsplitting Pentamirror™  is a constant deviation device developed by PLX to duplicate the performance of a pentamirror, with added advantages. The HBPM is a powerful and versatile tool for surveying, laboratory experimentation, and a range of metrology applications. The device enables incoming light to be deviated by 90° with great accuracy while generating additional output beams. These outputs will also be at 90° from one another. The assembly is invariant and thus permits movements such as rotation without compromising either the 90° deviation or its inherent accuracy.

The optical elements of the Hollow Beamsplitting Pentamirror assemblies are monolithic structures made of fused silica glass and are mounted in an aluminum enclosure, with a black anodized finish. They are available in 1" and 2" clear aperture, with accuracies to better than 1 arc second

Penta with Beamsplitter: This is a combination of a flat mirror and beamsplitter mounted at 45° to each other.

An optional configuration incorporating two beamsplitters can also be provided (shown below). This further highlights the versatility of the HBPM.

penta 2 splitter straight_labeled 21.jpg

This configuration allows four outputs to be generated. If interested, please be sure to indicate this option upon requesting a quote, or feel free to contact us directly.

Specification Chart
Model Clear Aperture (in/mm) Beam Deviation (arcsec.) Exiting Wavefront (P.V. 633nm) Weight (grams)
HBPM-10 HBPM-10 1.0/25 1.0 - 30.0 0.1 - 0.5 685
HBPM-20 HBPM-20 2.0/51 1.0 - 30.0 0.1 - 0.5 1650
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