Yantai ZK Optics Co., Ltd.
Custom fabrication of high precision glass parts. Spirit of enterprise: Integrity, Pragmatism, Innovation, Win-win, Appreciation. Tenet of enterprise: the Supremacy of Customer, the Excellence in
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Frosted Quartz Plate with engraving OEM Size used for optical platform
| Parameter | Standard Grade | Precision Grade | Ultra-precision Grade |
| Dimensional Tolerance | +/-0.2 | +/-0.1 | +/-0.05 |
| Clear Aperture | >80% to >90% | >80% to >90% | >80% to >90% |
| Surface Quality | 80/50 | 60/40 | 40/20 |
| Parallelism | 3 arc min | 1 arc min | 30 arc seconds |
| Wavefront Distortion | 5λper 25mm | 1λper 25mm | λ/4 |
| Protective Bevel | <0.25x45 deg | <0.25x45 deg | <0.25x45 deg |
| Material | Synthetic fused Silica, Fused quartz, IR quartz, Borosilicate glass,Sapphire crystal, K9, B270, etc. | ||
| Shape | Circular, square, triangular, oval, and other shaped windows | ||
| Dimension | Large window, Ultra-thin window, Regular size window | ||
| Precision | Ordinary refractory window, High precision optical window | ||
| Coating | High anti-UV Film, antireflective film, gold, aluminum, silver series quartz glass, quartz UV filter, curved reflector and so on. | ||