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Cylindraical Lenses
Cylindrical lenses are used to correct astigmatism in the eye and in rangefinders, to produce astigmatism, stretching a point of light into a line, they are widely used in bar code scanning, projection optics systems, laser measurement systems and holography.
Cylindrical lenses are available in either plano-concave or plano-convex configurations from WITOPTICS, 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.
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| Plano-Concave Cylindrical Lens | Plano-Convex Cylindrical Lens |
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Attribute
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Specification
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Typical Material
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N-BK7, H-K9, Fused Silica, N-SF10, etc
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Diameter Tolerance (mm)
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±0.2 (General), ±0.05 (High Precision)
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Focal Length Tolerance (mm)
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±2%
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Centration
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<3 arc min
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Surface1 Figure (per 25mm@632.8nm)
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λ/2 (General), λ/4 (High Precision)
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Surface2 Figure (per 25mm@632.8nm)
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2λ (General), λ (High Precision)
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Surface Quality
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60/40 (General), 10/5 (High Precision)
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Bevel (face width x 450)
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<0.2-0.5mm (General), 0.05-0.2 (High Precision)
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Coating
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upon request
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