K9L Single Surface Optical Flats
K9L Single Surface Optical Flats feature one ultra-precision polished optical surface with superior flatness accuracy, serving as a high-quality reference standard plane. They are widely used to inspect and verify the flatness deviation and fitting performance of high-precision surfaces on various optical components and mechanical parts.
Each optical flat is finely processed and strictly tested by Zygo interferometers to guarantee reliable surface precision and consistent performance. Manufactured from premium K9 optical glass, these flats offer excellent broadband transmittance ranging from 350 nm to 2000 nm. The material provides high hardness, strong resistance to physical and chemical corrosion, and minimal bubbles and inclusions, making it an ideal substrate for a wide range of precision optical components.
Parameters
| Material | H-K9L Optical Glass |
| Diameter Tolerance | ± 0.2 mm |
| Thickness Tolerance | As below |
| Surface Accuracy | λ/20@633 nm, λ/10@633 nm |
| BackFine | Ground |
| Parallelism | < 1 arcmin |
| Surface Quality | 40/20-60/40 |
| Bevel | Protective Bevel 0.2~0.5 mm X 45° |
| Coating | Uncoated |
Model
| Dia., mm | Thickness, mm | Surface Accuracy |
| Φ25.4 Φ50.8 Φ76.2 Φ101.6 Φ152.4 Φ203.2 Φ254.0 Φ304.8 | 12.7 ± 1 12.7 ± 1 19.1 ± 1 19.1 ± 1 25.4 ± 2 38.1 ± 2 38.1 ± 2 38.1 ± 2 | λ/20@633 nm, λ/10@633nm |