Penta prism can deviate an incident beam without inverting or reversing to 90°.The deviation angle of 90° is independent of any rotation of the prism about an axis parallel to the line of intersection of the two reflecting faces. It is commonly used in Plumb Level, Surveying, Alignment, Range finding and Optical Tooling. The reflecting surfaces of this Prism must be coated with a metallic or dielectric coating. The standard Penta Prism reflecting surfaces are coated with aluminum or enhanced aluminum.

Standard Precision Penta Prism
Material:------------------------- N-BK7 Grade A optical glass
Dimension Tolerance:--------±0.2mm
90° Deviation Tolerance:---according to the table
Flatness: ------------------------ /2(Standard), /4(High Precision)@633nm
Reflectivity:--------------------- R > 95% per face @400-700 nm
Surface Quality: --------------60-40 scratch and dig
Coating on input and output sides:-------Uncoated

High Precision Penta Prism
By adding a wedge for deviation correction in output beam surface, it can be used as Percision Penta Prism. It is often used in Plumb Level, Surveying, Alignment, Rangefinding and Optical Tooling.
Material: ------------------------------------------------------- N-BK7 Grade A optical glass
Dimension Tolerance: -------------------------------------------------------------- ±0.2mm
90° Deviation Tolerance: ---------------------------------------------------------------- <5''
Flatness: ------------------------------------------------------------------------- /4@633nm
Reflectivity: ---------------------------------------------- R>90% per face @400-700nm
Surface Quality: --------------------------------------------------- 60-40 scratch and dig
Coating on input and output sides: ------------------------------------------- Uncoated

Note:

1. Please contact us for the prices.
2. Custom-made non-standard Penta Prisms at any size are available upon request.
3. Besides N-Bk7, non-stand Penta Prisms made of other optical materials are availbale upon request.
4. Custom-made Penta Prisms with better flatness (<l/4@633nm), or better surface Quality(Better
than 40/20,or 20/10) are available up on request.
5. AR coating on the input/output surfaces are available. Please refer to page 30 for coating.