Penta Prisms

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Monday, 06 February 2012

Penta Prisms

Penta Prisms deviate a beam by 90º without inverting or reversing the image. These prisms also have the property of constant deviation, which means that the 90º deviation angle applies to all rays transmitted by the effective aperture, regardless of their angle with respect to the optical axis. Penta prisms are thus very useful in applications where prism orientation cannot be precisely controlled. Due to the geometry of penta prisms, the reflecting surfaces due not utilize total internal reflection and must be coated with a metal or dielectric coating.

RMIStandard 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
Dimensions:	A=B=C
Dimensional Tolerance:	+ 0.000", – 0.010"
Angular Deviation:	≤ 3 arc minutes
Bevels:	0.010" – 0.030" at 45º
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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