BK7 plano convex cylindrical,plano concave cylindrical lens
Cylindrical lenses are available in either plano-concave or plano-convex configurations . 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 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.
Technical Parameters
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Material
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BK7,Fused silica,Sapphire,CaF2,Znse,other optical glass is available
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Diameter tolerance
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+0.0/-0.15mm (General), +0.0/-0.02mm (High Precision)
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Focal length tolerance
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+/-2%
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Centration
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<3arc min
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Clear aperture
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>80% (Small Size), >95% (Large Size)
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Surface figure
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lambda/2 (General), lambda/4 (High Precision)
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Surface Quality
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10/5,20/10,40/20,60/40,80/50
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Protective bevel
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<0.2mm*45degree
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Coating
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Uncoated,HR,AR,PR,BBAR,upon customer request
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Features:
Rectangular and Round shape are available, Diverges light in one dimension only, Other dimensions are available in small and mass production quantities, High Precision Dimension, Optional Substrate Material, Antireflection Coatings can be ordered as an option.
Applications:
Laser Scanners, Spectroscopy, Dye Lasers, Acousto-Optics, Optical Processors, Bar Code Scanning, Holographyr, Projection Systems, Imaging Systems, Optical Display Systems, Laser Measurement Systems.
Description:
Cylinder Lenses are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylindrical Lenses have a single cylindrical surface that causes incoming light to be focused in only a single dimension, stretching the image. Cylinder Lenses are available with positive or negative focal lengths, ideal for laser line generation or anamorphic beam shaping to circularize laser outputs.
Cylindrical lenses are 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.
Cylindrical lens has at least one surface that is formed like a portion of a cylinder.These patented gradient-index cylindrical microlenses with Luneburg type refractive index distribution are drawn from a highly polished gradient-index fiber preform. A simple tuning of the drawing process produces diffraction-limited microlenses in the shape of fibers or rods with precise diameters and unsurpassed surface quality. When illuminated sideways, these fibers act as perfect cylindrical lenses with 0.5 NA. The fused silica cladding and the gradient-index core of these lenses withstand very high temperatures (transition temperature is ≈1100°C).
Spherical Lens 