Beamsplitter Cubes

Beamsplitter cubes are constructed by cementing two right angle prisms together at their hypotenuses. They are supplied with a beamsplitter coating, applied to the hypotenuse of one of the prisms. The leg faces are uncoated, but can be AR coated upon request. Esco manufactures general beamsplitter cubes for use in the visible and UV spectra.


  • Transmitted beam is neither displaced or deflected
  • Reflected and transmitted beams travel identical optical path lengths
  • No ghost images
  • Less susceptible to mechanical stress than plates
  • R/T ratio dependent on the state of polarization
  • Designed for use with collimated beams
  • Contains cemented interface that may be susceptible to high power
  • Cemented interface may introduce undesired wavefront distortion in larger cubes

Contact our sales team to place a custom order.

Esco Optics manufactures both catalog and custom optical components, to meet every customer's needs and order specifications. For more information, and to receive a quote for your order, call 1-800-922-3726, email, or fill out the form below.

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Quality Optics from a Trusted Supplier

American Owned & Operated

Esco Optics is a leading manufacturer of custom and catalog optics, precision optical components, and ITAR optics in the United States.

Military & Defense Supplier

As the leader for military and defense optics in the United States, Esco Optics adheres to the International Traffic in Arms Regulations.

ITAR Registered & Compliant

ITAR registered and compliant, Esco manufactures ITAR optics for all of its customers with the strictest confidentiality.