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Beamsplitters

Cube and Plate Beamsplitters Optical ManufacturingReynard Corporation offers a wide range of custom and in stock beamsplitters.  We customize our beamspltters to meet your specific spectral and quality requirements at a competitive price.  Our engineers are ready to help you with your design requirements at the beginning of your project.

Cube Beamsplitter

The 50% / 50% visible cube beamsplitter consists of two cemented right angles prisms. One prism is coated on the hypotenuse to provide a coating that will reflect and transmit the incident light.  The coating shows minimum sensitivity to variations in angles of incident and polarizations as compared to plate beamsplitters.  The cube beamsplitter generally enables the optical system to have greater resolution than is possible with a plate type beamsplitter since asymmetrical optical aberrations are eliminated.

The Cube Beamsplitter is also available in any split between reflection and transmission on special order.

Laser Non-Polarizing Cube Beamsplitters

The laser non-polarizing cube beamsplitter is used for those applications where polarization effects must be kept to an absolute minimum. Unlike the hybrid coatings used in the conventional cube beamsplitters, these all-dielectric coatings are designed for high performance at specific wavelengths, where they easily exceed the performance of any other available beamsplitters. Being totally dielectric, they have negligible absorption.

The current range includes a coating designed specifically for diode lasers at 670, 780, and 830nm. At these wavelengths, this cube beamsplitter's coating reflects 50±5% of incident light.  The S and P components of the reflected (and therefore transmitted) beam differ by less than 5%. Both components are within ±2.5% of the average polarization performance.

Plate Beamsplitters

The plate type beamsplitter is designed to reflect and transmit light at 45 degrees. The beamsplitter consists of a multilayer all dielectric coating material that has less than 0.5% absorption.

Plate beamsplitters have a number of advantages over cube beamsplitters. They are devoid of optical cements which can absorb energy. They can with stand higher levels of laser power without damage, they can operate at higher temperatures and they are less expensive than cube non-polarizing beamsplitters

Laser Line Non-Polarizing Plate Beamsplitter

The laser line non-polarizing plate beamsplitter is for situations where the polarization characteristics of the incident laser energy radiation must be maintained in reflection and transmission. It can be used to obtain a 50/50 split for laser energy regardless of the polarization state of the incident beam.

Polka Dot Beamsplitter

The polka dot beamsplitter has a constant reflection to transmission ratio over its entire 250 to 2500 nm spectral range. This optical device consists of an ultraviolet grade fused silica substrate with a vacuum deposited aluminum coating. This coating is applied in a manner that gives the beamsplitter a polka dot appearance. Thus, the beam is split by reflection from and absorption into the aluminized coating, and transmitted through the non-aluminized dot on the uncoated fused silica. This versatile beamsplitter is not angle sensitive and is ideal for splitting the energy from a radiant source, however it is not recommended for use in imaging systems.

It can be used to split power, to control illumination, or split a light source into multiple channels. The R/T ratio can be customized to meet specific system needs.

Circular Variable Beamsplitter – High Precision

Metallic circular variable beamsplitters are designed to split an incident beam into a transmitted and a reflected beam. The metallic beamsplitter coating material is protected aluminum, which has substantially less absorption losses than the conventional iconel coating. Both surfaces are coated with a broadband anti-reflection coating to reduce secondary images. The filters are designed to be used at 45 degrees.

The Variable Dielectric Circular Beamsplitters are designed to split laser radiation in wavelength from the extreme UV to the Far IR. The catalog filters are coated on a standard fused silica substrate with a graded all dielectric beamsplitter coating. The substrate and coating have very low absorption. As the filter is rotated, the ratio of R/T will vary from 10% to 90%. Thus it is possible to set any desired reflection / transmission ratios between 10% and 90%. For excimer application the coating should be applied to Schlieren quality Dynasil 4100, Corning 7940 or Suprasil 1.

Variable Dielectric Linear Beamsplitters for Excimer Laser

Variable Dielectric Linear Beamsplitters for Eximer Lasers are designed to be used with high power lasers. The filters can be used to split laser radiation in wavelength region from the UV to the Far IR. The filter consists of fused silica substrate with graded dielectric layers with low absorption losses. If the beamsplitter filter is used for a fixed wavelength then it will have different reflection values at different areas along its length, which makes it possible to set the desired reflection / transmission ratios between 10% and 90%. Conversely, if the wavelength is changed, the reflection / transmission ratio will change. Rear surface has a broadband anti-reflection coating for 45 degrees.

Linear Variable Beamsplitters – High Precision

Linear variable beamsplitters are designed to split an incident beam into a transmitted an a reflected beam. Protected aluminum is used as the beam splitting material. Aluminum is substantially less absorbing then the conventional iconel type coating material. Both surfaces are coated with a broadband anti-reflection coating to reduce secondary images. The filters are designed to be used at zero degrees.

Infrared Beamsplitters

Our standard infrared beamsplitters are fabricated from zinc selenide substrates and coated with dielectric materials to reflect and transmit 10.6 microns at 45 degrees. The back surface is coated with an anti-reflection coating for less than 0.5% reflection at 10.6 microns. The coating is designed to optimize S or P polarization since this type of coating is sensitive to polarization.

We also offer custom FAR infrared AR coatings, and custom thin film coatings, the design can be customized for almost any substrate index. Infrared (IR) Coatings effect light that extends from the edge of visible red (700nm) to the far infrared (approximately 50um for Reynard Corporation capabilities).