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The penta prism will neither invert nor reverse the image. Its function is to deviate the
direction of the light beam by 90 degrees. It has the valuable property of being a constant
deviation prism in that it deviates the line of sight through the same angle regardless of
its orientation to the line of sight.
| Standard Specifications |
| Material: |
BK7 grade A, fused silica |
| Dimension Tolerance: |
±0.1 mm to ±0.25 mm |
| Beam Deviation: |
90o ± 10 arc seconds to ± 30 arc seconds |
| Surface Flatness:: |
l/2 to l/4 |
| Surface Quality: |
20-10 to 60-40 scratch-dig |
| Clear Aperture: |
≥ 90%~95% |
| Coatings: |
single layer, multi-layer AR, mirror |
| Part No. | Size A | Size H | Surface Quality | Surface Flatness |
| BPTP001 | 5.0 mm | 5.0 mm | 20-10 | l/4 |
| BPTP005 | 7.0 mm | 7.0 mm | 20-10 | l/4 |
| BPTP010 | 10.0 mm | 10.0 mm | 20-10 | l/4 |
| BPTP015 | 12.7 mm | 12.7 mm | 20-10 | l/4 |
| BPTP020 | 15.0 mm | 15.0 mm | 20-10 | l/4 |
| BPTP035 | 25.4 mm | 25.4 mm | 40-20 | l/4 |
| BPTP046 | 35.0 mm | 35.0 mm | 40-20 | l/2 |
| BPTP070 | 50.0 mm | 50.0 mm | 40-20 | l/2 |
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