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Dia25.4mm EFL-75mm N-BK7 Plano Concave Lens 350-650nm AR Coating

Code: 1103-026

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TypePlano-concave LensMaterialN-BK7
Diameters(mm)25.4(+0.0/-0.1)Design Wavelength(nm)632.8
Effective Focal Length EFL(mm)-75.00±1%Back Focal Length BFL(mm)-76.15
Coating350-650nm AR Coating
Surface Quality(S/D)40/20
Irregularity@632.8nmλ/4Centration Error(arc min)≤2
Center Thickness(mm)3.5±0.1Edge Thickness(mm)5.6±0.1
Curvature Radius R1(mm)-77.86Clear Aperture90%
Protective Chamfer0.2mmx45°
Dia25.4mm EFL-75mm N-BK7 Plano Concave Lens 350-650nm AR Coating, Code: 1103-026.
Plano concave lens is a simple lens with one spherical face and one flat face, it has a negative focal length, allowing the part to increase the divergence of convergent light. Plano concave lenses can be used to balance out the spherical aberrations caused by other lenses. Concave lenses have a broad range of applications including, focusing and control of laser beams, imaging, and other optical instruments. 
Hangzhou Shalom EO stocks a series of N-BK7 plano-concave lenses with various diameters, focal lengths, and coatings, and the custom lens with other specifications are also available upon request.
350-650nm AR Coating