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Penta Prism

• Penta Prism

A penta prism is a five-sided reflecting prism used to deviate a beam of light by 90°. The beam reflects inside the prism twice, allowing the transmission of an image through a right angle without inverting it (that is, without changing the image's handedness) as an ordinary right-angle prism would. The important properties of Penta Prism are

* The image is neither inverted nor reversed, just deviated by 90°.
* With the prism, a constant deviation angle applies to all rays transmitted by the useful aperture, regardless of the angles between these rays and the optical axis (or entrance and exit face normal).

  • Main Specifications:
  • Material
    BK7  
  • Diameter Tolerance(h)
    +0.0/-0.1mm
  • Diameter Tolerance(A)
    +/-0.2mm
  • Surface Quality
    60-40 scratch and dig
  • Flatness
    λ/2@632.8nm
  • Reflectivity
    R > 95% per face @ 630 to 680 nm
  • Coating
    Aluminum and black painting are available
  • Chamfer
     Protective Bevel

 

 

  • Part No.
  • Axh (mm)
  • 1 min. Deviation
  • 30 sec. Deviation
  • 10 sec. Deviation
  • 7 x 6
  • PRS1100
  • PRS1110
  • PRS1120
  • 10 x 10
  • PRS1101
  • PRS1111
  • PRS1121
  • 15 x 15
  • PRS1102
  • PRS1112
  • PRS1122
  • 20 x 20
  • PRS1103
  • PRS1113
  • PRS1123

•High Precision Penta Prism

A wedge is added to get smaller deviation, which can be used in Plumb Level, Surveying, Alignment, Rangefinding and Optical Tooling.

  • Main Specifications:
  • Material
    BK7  
  • Diameter Tolerance
    +/-0.25mm
  • Surface Quality
    60-40 scratch and dig
  • 90° Deviation Tolerance
    2 arc seconds
  • Flatness
    λ/4@632.8nm
  • Reflectivity
    R > 95% per face @ 630 to 680 nm
  • Coating
    Aluminum and black painting are available
  • Chamfer
     Protective Bevel

 

 

  • Axh (mm)
  • Part No. (2.5 sec. Deviation)
  • 18 x 18
  • PRS1200

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