Rhomboid Prism
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.
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Attribute
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Specification
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Material
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BK7
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Tolerance (mm)
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±0.05
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Angle tolerance
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30 sec.
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Surface Quality
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40/20
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Flatness (per 25mm@633nm)
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λ/4@any 25.4mm area
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Reflectivity
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R > 95% per face @400-700 nm
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Coating
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Uncoated, AR, HR, etc.
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Note:
1. Custom-made non-standard Penta Prisms at any size are available upon request.
2. Besides Bk7, non-stand Penta Prisms made of other optical materials are availbale upon request.
3. 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.
4. AR coating on the input/output surfaces are available. Please refer to page 30 for coating.
1. Custom-made non-standard Penta Prisms at any size are available upon request.
2. Besides Bk7, non-stand Penta Prisms made of other optical materials are availbale upon request.
3. 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.
4. AR coating on the input/output surfaces are available. Please refer to page 30 for coating.