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The penta prism deflects a beam 900 regardless of the orientation of the prism. It neither inverts nor reverses the image orientation. They are used in rangefinders and viewfinders.
Reflecting surfaces are coated as specified below.
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PP series
Specifications:
Material: high-quality BK7 Schott glass
Flatness: λ/2 at reflection surface
λ/4 at transmission surface
Surface Quality: 40-20 scratch and dig
90° Deviation Tolerance: ±3 arc min; ±10 arc sec
Coating: Reflective surfaces are aluminized. |
ALL DIMENSIONS ARE IN
MILLIMETERS |
| 3 arc min. |
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