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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.
| o: |
diameter |
| tc: |
centre thickness |
| te: |
edge thickness |
| P: |
principal point |
| f: |
focal length |
| fb: |
back focal point |
| fp: |
focal Point |
| Diameter Tolerence: |
+0mm - 0.25mm |
| Edge/Centre Thickness Tolerence: |
+/- 0.25mm |
| Edge Finish: |
fine ground, beveled |
| Clear Aperture Diameter: |
80% of central diameter |
| Surface Figure: |
^/4 @ 632.8 nm |
| Surface Quality: |
60-40 scratch and dig |
| Bevel: |
0.25mm x 45 degree |
| Focal Length Tolerence: |
+/-2% |
| Back Focal Lenght Tolerence |
+/-2% |
BKY grade A optical glass - n=1.5183+/-0.0005n (@546.1nm)
High purity uv grade fused silica - n=1.4608+/-0.0005
(@546.1nm)
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.
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