Beam Splitters

Custom Optical Beamsplitters

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Laser Line Beam Splitter Manufacturing


PFG produces a wide variety of custom thin film polarizers in the UV, visible, and MWIR to meet your specific need. Our laser line polarizers combine high extinction ratio and high damage threshold for use in laser applications. These polarizers exhibit up to 10,000:1 extinction ratio and greater than 98% transmission for P-polarization. Our high damage threshold and excellent mechanical durability provide long operational lifetimes. Our polarizing cubes can be used for laser line or broadband applications. These cubes can be custom designed to meet a range of applications and provide high extinction ratios over a broad range, and can be cemented or chemically contacted for improved laser damage threshold.

Types of Beamsplitters

PFG offers an extensive variety of plate and cemented beamsplitters from UV to MWIR in a wide selection of sizes and glass types. Ranging from neutral density to dichroic to bandpass, including both polarizing and non-polarizing, PFG can customize these beamsplitters to meet your specific application. These beamsplitters can be applied to right-angle prisms, wedge prisms, penta-prisms, or rhomboids and may be optically cemented or chemically contacted for improved laser damage threshold.

Plate Beam Splitters

Cube Beam Splitter

Polarizing Beam Splitter

Laser Line Beam Splitter

Optical Beamsplitter Manufacturer

Whether using continuous polishers or double-side polishers, we confidently select the optimal process technology, and adhesion and blocking method (pitch, tape/wax or optical contacting) to meet your specifications. Our polishing technicians clearly understand that substrate type, dimensions, blocking method and material, final shaping, aspect ratio and coating, all significantly impact the end result. For wedged optics we have an extensive inventory of tooling, in many instances allowing us to avoid tooling charges and to reduce delivery times to our customers.

Coatings range from the deep ultraviolet through the mid-wave infrared. We provide dielectric and metallic mirrors; as well as notch, edge, dichroic, color substrate and neutral density filters.

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Polarizing Beam Splitters

Cube Beamsplitters

Cube beamsplitters are actually two halves of a cube cemented together from one corner to the opposite corner. From the top, it looks like a square with a diagonal line through it. We coat the hypotenuse angle of one of the prisms making up the “half-cube” in a reflective material such as silver, aluminum, or gold. Then we glue both halves together. To keep track of the side that light enters there’s usually an indicator mark in the bottom corner.

The outside surfaces are finely polished to prevent internal reflection and scattering. They even have an anti-reflective coating for easy cleaning. Cube beamsplitters are used for quick adjustments and are a bit more durable for continued use and mounting in projects. One of the benefits of the cube is that it supports itself, that is, it might not need mounting at all.

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Plate Beamsplitters

While less expensive, window or plate beamsplitters have their place and are no less useful than cube beamsplitters. Plate beamsplitters are more compact and lighter, which could be just what you’re looking for in a microscopy setup.

Because there’s no cement used, they can also tolerate a higher intensity beam than most cube beamsplitters are capable of. Instead of damaging the cement, it just passes through the plate beamsplitter and reflects off the surface with little physical effect over time. In this sense, they’re much more durable in use. The correct orientation for a plate beamsplitter is for the laser to first contact the beamsplitter coating.

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Beamsplitting With Custom Optics

Simple beamsplitting can be done with a clear plastic lid and a keychain laser. That doesn’t mean you should. PFG Optics has been manufacturing precision custom optics for decades. It’s literally in our blood, with four generations represented in the company. Not only is custom optics manufacture what we do, but we’re passionate about doing it right.

Whether you need custom lenses, prisms, flats, or beamsplitters with wedge prisms, pentaprisms, rhomboids, or more, PFG optics can help from consultation to the final product. Get in touch with us about your optics project requirements today!

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