Porro Prisms

Come see us at Photonics West 2012, Booth #1707

Monday, 06 February 2012

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, FS, UVFS, CaF₂
Surface Figure: BK7, UVFS, FS: CaF₂:	All polished surfaces: λ/20 at 633 nm λ/4 at 633 nm
Surface Quality:	All polished surfaces: 10-5 60-40 20-10
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:	Exceeds 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)

Call 303-664-5000 to discuss your optical requirements
Toll Free: 1-866-678-4270 Fax: 303-664-5001 Email: Sales@RMIco.com
Rocky Mountain Instrument Co. • 106 Laser Dr., Lafayette, CO • 80026 • USA

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