Technical parameters of calcium fluoride CaF2 double concave lens (uncoated)

material

Calcium fluoride (CaF2) single crystal

Design wavelength

587.6nm

size

D12.7*CT2.5 mm

Diameter error

+0/-0.1mm

radius of curvature

R-13.4  R-13.4mm

Center thickness error

±0.1mm

focal distance

F15mm

surface finish quality

40/20

Face type error

1/4L

Settlements error

3′

Focal distance error

±2%

angle of chamfer

0.2mm*45°