Cylindrical Lens

 

Cylindraical Lenses

 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.

Cylindrical lenses are available in either plano-concave or plano-convex configurations from FOCtek, 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.

    
 Plano-Concave Cylindrical Lens         Plano-Convex Cylindrical Lens 

 

 

Attribute Specification
Typical Material On request, for example N-BK7, H-K9, Fused Silica, N-SF10, etc
Diameter Tolerance (mm) ±0.2 (General), ±0.05 (High Precision)
Focal Length Tolerance (mm) ±2%
Centration <3 arc min
Surface Figure X (per 25mm@632.8nm) λ/2 (General), λ/4 (High Precision)
Surface Figure X (per 25mm@632.8nm) 2λ (General),  λ (High Precision)
Surface Quality 60/40 (General), 10/5 (High Precision)
Bevel (face width x 450) <0.2-0.5mm (General), 0.05-0.2 (High Precision)
Coating unpon request

 

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