Precision Penta Prism

Precision Penta Prism
A precision penta prism is a specific type of optical prism that is designed and manufactured to high precision standards. It is a five-sided prism with two triangular faces that are perpendicular to each other, forming a right angle, and three additional rectangular faces. The key features of a precision penta prism include:

  • High Precision: Precision penta prisms are manufactured with great accuracy and attention to detail. They are designed to ensure minimal deviation and dispersion of light as it passes through the prism.
  • Reflective Properties: Penta prisms are often used for reflection applications, where they can reflect light by 90 degrees without inverting or reversing the image. This makes them useful in applications where maintaining the orientation of the image is critical.
  • Optical Coatings: To enhance their performance, precision penta prisms are often coated with optical coatings to improve their reflectivity and minimize losses due to reflections and scattering.
  • Instrumentation and Metrology: Precision penta prisms find applications in various fields, including optics, metrology, and instrumentation. They are commonly used in optical systems where accurate reflection and alignment of light beams are essential.
  • Accuracy in Angle Measurement: Penta prisms can be used to measure and verify angles with a high degree of accuracy because of their precise geometry. They are often utilized in angle calibration and alignment procedures.
  • Optical Testing: These prisms are also used in optical testing setups to ensure the accuracy and quality of optical components and systems.
  • Interferometry: Penta prisms are employed in interferometry, a technique used for measuring the characteristics of optical surfaces and wavefronts.
Precision Penta Prism
Precision Penta Prism
Precision Penta Prism

Sample Designs of Precision Penta Prism

Factory Standard


BK7 Grade A optical glass, Corning Fused Silica 7980, JGS1, JGS2

Dimension Tolerance


90 Deviation Tolerance

Precision series up to 2 arc seconds


1/4 l at 632.8 nm


R > 95% per face from 630 to 680 nm

Surface Quality



On request

*Protective Bevel available

Avantier offers custom options to meet specific requirements. Our engineering team has extensive experience in designing complex optical systems for various applications.If you require more information or wish to explore the catalog of in-stock precision penta prism or custom options, you can contact Avantier. They have a track record of over fifty years as a trusted source for custom optics.


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