F2, H-K9L Optical Glass Rod Lens

Material Selection

H-K9L: Excellent transmittance in the visible range, good chemical stability, and high hardness; the preferred choice for general-purpose visible optics.

F2: Higher refractive index and dispersion, enabling shorter effective focal lengths and more compact system designs where chromatic control is required.

Precision Surface Quality

The 60/40 scratch-dig specification ensures minimal surface defects, reducing scattering losses and maintaining high transmitted wavefront fidelity. The double-sided surface figure of N=5, ΔN=0.5 guarantees accurate curvature and minimal irregularity for consistent optical performance.

High-Efficiency Anti-Reflection Coating
The dual-side multilayer AR coating achieves ≤0.2% reflectance per surface across the 480–643 nm band, maximizing energy throughput. This is particularly critical for low-light detection, high-power laser applications, and systems where transmission efficiency directly impacts signal-to-noise ratio.