Cylindrical Plano-concave Lens (BK7) 20×20mm −80mm Focal Length 400 - 700nm

CLB-2020-80NM

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.
◦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
Name Cylindrical Plano-concave Lens (BK7) 20×20mm −80mm Focal Length 400 - 700nm
Weight 0.0050kgs
Standard Coatings Available No
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, consult our Sales Division for assistance in your selection (CHA).
  • WEB Reference Catalog Code/W4022
Remark -
Attention
  • The cylindrical plano-concave lens has chromatic aberration, the focal length will vary depending on the wavelength. Please check the “wavelength characteristic of the focal length data” on “Technical Data” for the focal lengths of each wavelength.
  • When using a plano-concave cylindrical lens parallel light should incident to the concave side first. There is a possibility that the spherical aberration will increase and optical performance of the system will be degraded if use in reverse.
  • 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.
A x B 20mm x 20mm
Focal length 80mm
Material BK7
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.519
Coating Broadband Multilayer antireflection coating (400 - 700nm)
Transmmittance > Average 99%
Laser Damage Threshold 4J/cm2 (Laser pulse width ; 10ns , Repetition frequency ; 20Hz)
Clear aperture Circle or ellipse inscribed in a rectangular of 90% of the dimension
Surface Quality (Scratch-Dig) 20-10
Wavelength range of Antireflection Coating 400 - 700nm
A×B 20×20mm
Focal length f −80mm
Edge thickness te 4mm
Center thickness tc 2.8mm
Back focal length fb −81.8mm
Radius of curvature r 41.52mm
In stock
SKU
CLB-2020-80NM
$208.00

Delivery in : in stock

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.

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