|Type||Plano-Concave Cylindrical Lenses||Material||BK7,UVFS, ZnSe, CaF2|
|Clear Aperture||>90%||Size Tolerance||+0/-0.1mm|
|Thickness Tolerance||±0.2mm||Surface Irregularity||λ/2 @ 633 nm|
|Surface Quality||40/20 S/D||Paraxial Focal Length||±2% @587.6nm|
|Chamfer||0.2mm x 45 degree|
Plano-Concave Cylindrical Lens is an optical plano-concave lens in columnar form, with negative focal lengths, diverging light in one dimension. Plano concave cylindrical lenses could be utilized for linear expansion of light output, circularization of elliptical diode laser spots, conversion of circular collimated beams into laser lines, one-dimensional image stretching, and other applications relevant to beam manipulation and output processing, such as anamorphic image shaping, laser scanning, diode lasers, optical metrologies, and spectroscopes, etc. Like its spherical counterpart, plano concave cylindrical lenses are also optimized for infinite conjugate ratios and become less advantageous for conjugate ratios below 5:1.
Hangzhou Shalom EO offers various custom Plano-Concave Cylindrical lenses made from substrate materials including, but not limited to N-BK7, Fused Silica, CaF2, BaF2, MgF2, ZnSe, etc. Custom coating options for concave cylindrical lenses include uncoated substrates, Broadband Anti-reflection (BBAR) coatings that effectively reduce reflection (average reflection below 0.5%) over a certain wavelength range, and laser line V-coating which provides higher transmission (average reflection below 0.25%) at a narrower range around a certain wavelength, and MgF2 AR coatings (average reflection below 1.5%) with competitive low price. Both circular and rectangular versions are available.
To minimize spherical aberration, engineers from Shalom EO suggest that incoming light beams should be projected to the curved side of the lens for diverging.