Penta Prisms

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.

Attribute	Specification
Material	N-BK7 Grade A optical glass
Dimension Axh (mm)	2.5x2.5 ～ 100.0x100.0
Dimension Tolerance (mm)	±0.2 (General), ±0.05 (High Precision)
90⁰ Deviation Tolerance	<1 min. (General), <0.5 sec. (High Precision)
Flatness @633nm	λ/2 (General), λ/4 (High Precision)
Reflection (per face@400-700nm)	R>90%
Surface Quality	60/40 (General), 20/10 (High Precision)
Coating on input and output sides	uncoated, AR Coating, etc.

Note for Penta Prism:

(1). Besides N-BK7 glass, other optical glass is available for custom-made Penta Prisms.
(2). Penta Prism at bigger size is available.
(3). Typical deviation tolerance is 1 minute, better precision such as 30 sec, 10 sec, 5 sec., 3sec., 1sec., 0.5secis available.

(4). Typical reflection is >90% by Al coating, other metal coating such as Ag, Cu, or High Reflection Dielectric
Coating is available.
(5). Besides uncoating, Anti-Reflective(AR) coating is available upon request.

Right Angle Prisms Beamsplitter Penta Prism

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