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Location: Main > Optical Prisms > Roof Penta Prisms > PTP-20
Name: 20mm Penta Prism(Coated)
P/N: PTP-20
Keywords:20x20mm,BK7,Penta Prism,Coated/Painted
Unit Price: S$265.00/pc
Available: Call us
Request: Add to Request List
Introduction:
Penta prisms are five-sided reflective prisms which are used to deviate light by a constant 90-deg. The reflections inside the Penta prism are not due to total internal reflection but due to the reflective coatings on two surfaces. The two opposite transmitting sides can be coated with an AR coating upon customers' request. The light entering the Penta prism reflects inside the prism twice allowing the transmission of an image through a right angle without inverting or reversing it.
 Substrate Material:  Fine Anneal BK7 Optical Glass
 Outer Dimension:  
 A=B=C=20mm
 L1=L2=28.28mm
 
 Dimension Tolarence:  +/-0.10mm
 Surface Quality:  40/20 scratch and dig
 Flatness:  < Lambda/8 @ 633nm (80% of aperture)
 Reflective Coating:  Aluminized with inconel and black paint overcoat