Cylindrical Lens
Cylindrical lenses are available in either plano-concave or plano-convex configurations from Us. Plano-concave lenses have a negative focal length and are used for image reduction or to spread light. Plano-convex lenses have a positive focal length, which makes them ideal for collecting and focusing light for many imaging applications. Cylindrical lenses are used to correct astigmatism in the eye and in rangefinders, to produce astigmatism, tretching a point of light into a line, they are widely used in bar code scanning, projection optics systems, laser measurement systems and holography.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | N-BK7, Fused Silica,N-SF10, CaF2 etc. |
| Diameter Tolerance [General] | +0.0/-0.15mm |
| Diameter Tolerance [High Precision] | +0.0/-0.02mm |
| Focal Length Tolerance | +/-2% |
| Centration | <3 arc minutes |
| Clear Aperture [Small Size] | >80% |
| Clear Aperture [Large Size] | >95% |
| Surface Figure X [General；per 25mm@632.8nm] | λ/2 |
| Surface Figure X [High Precision；per 25mm@632.8nm] | λ/4 |
| Surface Figure Y [General；per 25mm@632.8nm] | 2λ |
| Surface Figure Y [High Precision；per 25mm@632.8nm] | λ |
| Surface Quality [General] | 60/40 |
| Surface Quality [High Precision] | 10/5 |
| Protected Bevel | <0.25mmx45deg |
| Coating | Upon request |
Datasheet
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Supplier Information
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