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Negative cylinders have one flat surface and one concave surface and have a negative focal length.
Below are our standard negative cylinder specifications.
Don't see what you need? Request custom optics.
| Lens Type |
Negative Cylinder |
Length Tolerance |
± 0.10 mm |
| Glass Type |
N-BK7 |
Width Tolerance |
± 0.14 mm |
| Dimension Unit |
mm |
Center Thickness |
± 0.50 mm |
| Focal Length |
± 2% |
Surface Quality |
60-40 |
| Surface Accuracy |
Y-Direction
X-Direction |
1/2 Wave |
Centration |
< 3 arc minutes |
| 1/2 Wave per 25 mm |
Clear Aperture |
90% |
| Flat Annulus |
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0.50 +0 / -0.40 |
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| Coating |
Uncoated, Specify your coating (See Coating Chart for Available Options) |
| * All dimensions are in mm |
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