RMI Laser Optics and Coatings Prototype Through Production

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June 17-20
Frankfurt, Germany
Booth #G45

Friday, 09 May 2008

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Porro Prisms

Porro Prisms

Porro Prisms operate on the principle of total internal reflection (TIR). A beam entering perpendicular to the entrance / exit surface is reflected by the two roof surfaces and emerges parallel to itself. For applications in which either the acceptance angle for TIR is exceeded, or the reflecting surfaces cannot be kept sufficiently clean for TIR, a metal or dielectric coating can be applied to the reflecting surfaces.

RMI STANDARD SPECIFICATIONS
Materials:	BK7, UVFS
Surface Figure:	λ/10 at 633 nm, all polished surfaces
Surface Quality:	10-5, all polished surfaces
Dimensional Tolerance:	+ 0.000", – 0.010"
Angular Deviation:	180º
Bevels:	0.010" – 0.030" at 45º on input edge; minimum safety bevel on roof edges
Clear Aperture:	Central 85% of diameter

Applicable Coatings Quick Links

VIS / NIR Coatings
    Single Layer Anti-Reflection (SAR)
    Narrowband Anti-Reflection (NAR)
    Broadband Anti-Reflection (BAR)

Metal Coatings
    Bare Aluminum (BAL)
    Bare Gold (BAU)
    Protected Aluminum (PAL)
    Enhanced Aluminum (EAL)
    Protected Silver (PAG)
    Enhanced Silver (EAG)
    Protected Gold (PAU)
    Enhanced Gold (EAU)

Last Updated ( Wednesday, 02 May 2007 )

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Due to their potential strategic high value, export of RMI products and related technical data may be subject to U.S. or other export licensing requirements.
Please consult your export control administrator or contact RMI for more information.

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