Double-convex lenses are primarily used for collecting,
refocusing light from a small source and focusing collected
beams, where the lenght of an optical train is more
important than focused spot quality.
back focal point
+0mm - 0.25mm
Edge/Centre Thickness Tolerence:
fine ground, beveled
Clear Aperture Diameter:
80% of central diameter
^/4 @ 632.8 nm
60-40 scratch and dig
0.25mm x 45 degree
Focal Length Tolerence:
Back Focal Lenght Tolerence
BKY grade A optical glass - n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica - n=1.4608+/-0.0005
Anti-reflection Coating Available.
To improve transmittace we can supply your lenses coated
with a single layer (broad band) or multi layer (narrow
band) anti-reflection coating on both sides.