BK7 lens
Good performance over visible and near IR spectrum for most applications.

BK7 lens

Transmission Range: 330-2100nm

Refractive Index: 1.5164 @ 588nm.

Good performance over visible and near IR spectrum for most applications.

Materials:BK7 grade A optical glass

Diameter Tolerance: +0/-0.10mm

Thickness Tolerance: ±0.10mm

Clear Aperture: >85%

Flatness ( @633nm): /10//4/ 1 per 25mm

Parallelism: <10 arc seconds/ <30 arc seconds/ <1 arc minutes

Surface Quality: I~III

Bevel: 0.25mm×45°

Coating: Available upon request