| Customization: | Available |
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| Usage: | Lighting, Medical, Optical, Photography, Astronomy |
| Type: | Convex Lens |
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| Items | Description | |
| Achromatic Doublet | Material: | Schott N-Balf4 |
| Schott N-LAK12 | ||
| Diameter: | 20.0+0.0/-0.02mm | |
| Center thickness: | 9.0+/-0.2mm | |
| ROC1: | 16.3701+/-0.20%mm,CC | |
| ROC2=ROC3: | infinity | |
| ROC4: | 21.7369+/-0.20%mm,CX | |
| Flatness: | S1&S2&S3&S4:IRR:0.5fr@632nm | |
| Surface quality: | S1&S2&S3&S4:40-20 | |
| Centerness: | <3arcmin | |
| Clear Aperture: | >D18.0mm | |
| Chamfer: | <0.5mmx45deg | |
| Coating: | S1&S4:AR coating,Ravg<0.4%@425-625nm,AOI=0deg | |
| Standard: | MIL-PRF-13830B | |
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