Cylindrical Plano-concave Lens (BK7) / CLB-2020-300N

Cylindrical plano concave lens has a concave curvature in the vertical direction and has no curvature in the horizontal direction. When used in combination with a plano-convex cylindrical lens an elliptical shaped beam can be sharped into a circular beam for use in semiconductor and other laser applications.
In stock
Part Number
CLB-2020-300N
S$166.47
◦Plano Concave Cylindrical lenses are available in BK7 for from visible range to infrared wavelength range.
◦BK7 lenses are also available with three types of anti-reflection coatings, visible wavelength range, in the near-infrared range and in the infrared range.
◦Cylindrical lenses are often used in an optical system to change the shape and aspect ratio of the illumination light beam.
More Information
Catalog Code W3068
RoHS Yes
CE No
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CAD data
Guide ▶Lenses are available in a large selection and in custom sizes and focal lengths.
▶In addition to our standard coating we offer custom anti-reflective coating at specific wavelengths.
▶We offer holders to mount our catalog cylindrical lenses
Attention

▶The cylindrical plano-concave lens has chromatic aberration, and the focal length will vary depending on the wavelength. Please check the wavelength characteristic of the focal length data for the focal lengths of each wavelength.
▶Cylindrical plano-concave lenses have a specified direction of incident light. Make sure that the collimated light is incident from the concave side. If it is reversed, spherical aberration will increase, and the optical performance of the optical system may be impaired.
▶Transmissions losses due to reflection off the front and rear surfaces of the lens can be minimized by coating the surfaces. Consult our Sales Division for anti-reflection coatings suitable for your application.
▶ Sharpe edges are common in negative lenses are removed by beveling in order to reduce chipping may result in smaller then edge thickness. Thicknesses listed in tables are to theoretical sharp edge.

Specifications
MaterialBK7
Design wavelength546.1nm
Refractive indexne=1.519
CoatingUncoated
Wavelength range of Antireflection CoatingUncoated
Clear apertureCircle or ellipse inscribed in a rectangular of 90% of the dimension
Surface Quality (Scratch-Dig)20−10
A×B20×20mm
Focal length f−300mm
Edge thickness te4mm
Center thickness tc3.7mm
Back focal length fb−302.4mm
Radius of curvature r155.7mm