BK7 Precision Windows
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| Material | BK7 Grade A Fine Annealed | |||||
| Dimensions | MM | |||||
| Diameter Tolerance | + 0 / -0.10 mm | |||||
| Thickness Tolerance | ±0.10 mm | |||||
| Clear Aperture | 90% | |||||
| Surface Quality | 40-20 Scratch-Dig | |||||
| Parallelism | < 30 Arc Seconds | |||||
| Coating | Uncoated (See Coating Chart for Available Options) | |||||
| * All dimensions are in mm | ||||||
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