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, projectio..
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.
LENSES
|
MATERIALS
|
ILLUSTRATION
|
PROPERTIES AND APPLICATIONS
|
CYLINDRICAL LENS
|
BK7/ Fused Silica/CaF2 /other optical glass
|
![]() |
Used to provide focusing power in one section only. For illumination or detection of light from line sources. Also used for anamorphic compression of beams and images.
|
![]() |
![]() |
||
Plano-Concave Cylindrical Lens
|
Plano-Convex Cylindrical Lens
|
General
|
HIGH PRECISION
|
|
Material
|
Schott N-BK7, CDGM H-K9L, Fused silica, 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%
|
Centration
|
<3'
|
<1'
|
Clear aperture
|
80%
|
90%
|
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
|
Coating
|
Uncoating ,AR or Single layer MgF2 coating upon request
|