Cylindrical 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 Lasertec, 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 Lens BK7 Fused Silica
Cylindrical Lens
BK7 Fused Silica

 

Attribute
Commercial
Hign Precision
Material
Schott N-BK7, H-K9L, Fused silica, Si, CaF2, Sapphire
Design Wavelength
546.07nm
Design Index (BK7)
1.51680 for BK7, 1.45846 for Fused Silica
Diameter Tolerance
+0.0, 0.15mm
+0.0, 0.05mm
Paraxial Focal Length
±2%
±0.5%
Cerntration
<3'
<1'
Surface Quality
60-40 scratch and dig
10-5 scratch and dig
Surface Irregularity
< λ/4
< λ/8
Protective Bevel
0.25 + 0.25, -0.0mm
0.2 ± 0.1mm