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Penta Prisms

The penta prism precisely defines a right Angle and is independent of the Angle of incidence. After two total 270 ° reflections inside the prism, the incoming light is emitted from adjacent surfaces at a precise 90 °. The processing technology of Tianyanggu pentaprism is mature, and it is easy to achieve high-precision dimensions, and the accuracy of the prism with a size of less than 3 inches can be controlled within 2 seconds. After milling, fine grinding, grinding and polishing, the roof prism can achieve high precision mirror flatness and Angle accuracy.

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Specifications of Penta Prisms


Penta Prisms product parameter table
projectIndicator requirements
1. MaterialOptical glass, fused quartz 7980, JGS1, JGS2 and other materials
2. Overall dimensionsMaximum dimensions: ≤100×100mm ±0.05mm or according to customer requirements
3. ThicknessT≤50mm±0.02 according to customer requirements
4. Working wavelengthIn the ultraviolet (UV), visible or infrared (IR) spectrum
5. CoatingThe reflective surface is aluminized and painted black, and the incident and exit surfaces are coated with MgF2 monoclonal reflex coating
6. Angle toleranceaccording to customers needs
7. Effective aperture2′
8. Flatnessλ/4 @632.8 nm
9. Surface quality60-40, 40-20, 20-10, 10-5


Dimension Drawing of Penta Prisms

Dimension Drawing of Penta Prisms

Features of Penta Prisms

Features of Penta Prisms
  • One-stop customized production: Solar Valley processes various sizes of pentaprisms according to customer requirements.

  • Material: Optical glass, fused quartz 7980, JGS1, JGS2 and other materials are used.

  • Pentaprism performance: Pentaprism precisely defines a right Angle, and is independent of the Angle of incidence. After two total 270 ° reflections inside the prism, the incoming light is emitted from adjacent surfaces at a precise 90 °. Pentaprisms are commonly used in plumb levels, measurement, calibration, ranging, optical tools, camera viewfinders, and image viewing systems. Tianyanggu Pentaprisms achieve optimal performance in ultraviolet (UV), visible or infrared (IR) spectra.

  • Product size indicator description:

    Pentaprism maximum dimensions: ≤100×100mm thickness T≤50mm


  • Surface defect grade: 60-40, 40-20, 20-10, 10-5 According to customer requirements.

  • Coating: The two reflective surfaces are coated with aluminum film and black paint, and the incident and exit surfaces are coated with MgF2 monoantibody reflection coating, or the coating is performed according to customer requirements.

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