| Dimension Tolerance | (W±0.1mm) ×(H±0.1mm)× (L+0.2mm/-0.1mm) or (Dia ± 0.1mm)×(L+0.2/-0.1mm) |
Wavefront Distortion | < λ/8 @ 633nm |
| Clear Aperture | > 90% of the central area | Chamfer | ≤0.3mm @45° |
| Flatness | λ/8 @ 633nm (L≥ 2.5mm) λ/4 @ 633nm (L< 2.5mm) |
Chips | ≤ 0.1mm |
| Surface Quality | 20/10 S/D | Parallelism | < 10" |
| Perpendicularity | ≤ 10' | Angle Tolerance | ≤ 0.2° |
| Interior Quality | No visible scattering paths or centers [inspected by 50mW green laser] |
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Notes:
Physical and Optical Properties:
| Chemical Formula | KD2PO4 | Curie Temperature | 222K |
| Symmetry | 42m | Density | 2.355g/cm3 |
| Absorption | 0.005/cm | Extinction Ratio | 1:10000 |
| Deuterium Ratio | >98% | Transmission Band | 200-1600nm |
| Non-linear Coefficient | d36=0.40pm/v | Longitudinal Half-wave Voltage | 2.98KV(I=546nm) |
| Electric Resistance | >2x109Ώ/cm | Electric –optical Coefficient | r41=8.8pm/v, r63=25pm/v |
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