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A cylindrical lens is a lens which focuses light which passes through on to a line instead of on to a point, as a spherical lens would. The curved face or faces of a cylindrical lens are sections of a cylinder, and focus the image passing through it onto a line parallel to the intersection of the surface of the lens and a plane tangent to it. The lens compresses the image in the direction perpendicular to this line, and leaves it unaltered in the direction parallel to it (in the tangent plane).
Cylindrical lenses can be used to correct ocular astigmatism, although toric lenses are more commonly used. They can also potentially be used in solar water heating installations, such as a plastic pillow-type solar water heater. They are used to correct the output from diode lasers, to produce a round beam from the diode's elliptical output.
Parameters of optical glass cylindrical lens
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1.Materials
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BK7/K9, fused silica, sapphire, ZnSe, etc
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2. Dimension
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0.5mm-400mm
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3.Surface quality
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10/5, 20/10, 40/20, 60/40
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4.Focal length tolerance
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±1%
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5.Length tolerance
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±0.1mm
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6.Width tolerance
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±0.1mm
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7.Center thickness tolerance
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±0.1mm
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8.Centration
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5 arc minutes
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9.Surface precision
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0.5 fringes/cm
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10.Clear aperture
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>90%
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12.Coating
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HR, AR
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13.Bevels
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Protective bevels by 45deg*0.25mm
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Shapes of optical glass cylindrical lens
1. plano-convex cylindrical lens
2. plano-concave cylindrical lens
3. bi-convex cylindrical lens
4. bi-concave cylindrical lens
5. Steinheil doublet achromatic lens
6. Dialyte achromatic lens
Applications of optical glass cylindrical lens
Bar Code Scanning
Computer
Double beam holographic optical path system
Fourier spectrometer
Four-wheel orientation systerm (KDS)
Holographic lighting
Imaging
Laboratory equipment
Laser collimator
Laser Measurements Systems
Linear detector lighting
Projection Optics System
Specifications of optical glass cylindrical lens
1. High accuracy
2. Competitive price
3. Fast lead time
4. IR aspheric lens
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