Compare Model Drawings, CAD & Specs Lens Shape Diameter Effective Focal Length (EFL) Availability Price
Polished Aspheric Lens, Plano-Convex, L-BAL35, 15 mm, 22.5 mm EFL, Uncoated
$256
In Stock
Plano-Convex Aspheric 15.0 mm 22.5 mm
In Stock
Polished Aspheric Lens, Plano-Convex, L-BAL35, 15 mm, 18.75 mm EFL, Uncoated
$257
In Stock
Plano-Convex Aspheric 15.0 mm 18.8 mm
In Stock
Polished Aspheric Lens, Plano-Convex, L-BAL35, 15 mm, 15.0 mm EFL, Uncoated
$264
In Stock
Plano-Convex Aspheric 15.0 mm 15.0 mm
In Stock
Polished Aspheric Lens, Plano-Convex, L-BAL35, 15.00 mm, 11.25 mm EFL, Uncoated
$276
In Stock
Plano-Convex Aspheric 15.0 mm 11.3 mm
In Stock
Polished Aspheric Lens, Bi-Convex, L-BAL35, 20 mm, 20.0 mm EFL, Uncoated
$292
In Stock
Bi-Convex Aspheric 20.0 mm 20.0 mm
In Stock
Polished Aspheric Lens, Bi-Convex, L-BAL35, 20 mm, 15.0 mm EFL, Uncoated
$308
In Stock
Bi-Convex Aspheric 20.0 mm 15.0 mm
In Stock
Polished Aspheric Lens, Plano-Convex, L-BAL35, 25 mm, 37.5 mm EFL, Uncoated
$292
In Stock
Plano-Convex Aspheric 25.0 mm 37.5 mm
In Stock
Polished Aspheric Lens, Plano-Convex, L-BAL35, 25 mm, 31.25 mm EFL, Uncoated
$292
In Stock
Plano-Convex Aspheric 25.0 mm 31.3 mm
In Stock
Polished Aspheric Lens, Plano-Convex, L-BAL35, 25 mm, 25.0 mm EFL, Uncoated
$308
In Stock
Plano-Convex Aspheric 25.0 mm 25.0 mm
In Stock
Polished Aspheric Lens, Plano-Convex, L-BAL35, 25 mm, 18.75 mm EFL, Uncoated
$322
In Stock
Plano-Convex Aspheric 25.0 mm 18.8 mm
In Stock
Polished Aspheric Lens, Bi-Convex, L-BAL35, 30 mm, 30.0 mm EFL, Uncoated
$377
In Stock
Bi-Convex Aspheric 30.0 mm 30.0 mm
In Stock
Polished Aspheric Lens, Bi-Convex, L-BAL35, 30 mm, 22.5 mm EFL, Uncoated
$390
In Stock
Bi-Convex Aspheric 30.0 mm 22.5 mm
In Stock
Polished Aspheric Lens, Bi-Convex, L-BAL35, 40 mm, 40.0 mm EFL, Uncoated
$477
In Stock
Bi-Convex Aspheric 40.0 mm 40.0 mm
In Stock
Polished Aspheric Lens, Bi-Convex, L-BAL35, 40 mm, 30.0 mm EFL, Uncoated
$491
In Stock
Bi-Convex Aspheric 40.0 mm 30.0 mm
In Stock
Polished Aspheric Lens, Bi-Convex, L-BAL35, 50 mm, 50.0 mm EFL, Uncoated
$575
In Stock
Bi-Convex Aspheric 50.0 mm 50.0 mm
In Stock
Polished Aspheric Lens, Bi-Convex, L-BAL35, 50 mm, 37.5 mm EFL, Uncoated
$626
In Stock
Bi-Convex Aspheric 50.0 mm 37.5 mm
In Stock

Specifications

  • Lens Type
    Precision Polished Aspheric Lens
  • Antireflection Coating
    Uncoated
  • Lens Material
    L-BAL 35 (589/611)
  • Surface Quality
    60-40 scratch-dig
  • Surface Accuracy
    0.75 µm RMS
  • Diameter Tolerance
    +0.0/-0.1 mm
  • Center Thickness Tolerance
    ±0.1 mm
  • Clear Aperture
    90% of central diameter

Features

Advantage of Aspheric Lenses

In applications that require large acceptance angles, such as light gathering for illumination, spherical lenses are unsuitable due to spherical aberration, or the effect of refractive power of a spherical surface becoming greater with increasing aperture. Aspheric lenses maintain constant focal length or very high NA, avoiding the need for multiple elements to correct spherical aberration. This simplifies system design by reducing weight and component count. It also results in less transmission loss, and less ghosting due to having fewer surfaces. The primary drawback of aspheric lenses is off-axis performance is poor. This is not a problem for coupling to and from optical fibers or collimating light sources, but aspheric lenses are not usable over a wide field of view.

Efficiently Focus or Collect Light

Our Precision Aspheric Lenses have diffraction limited performance on axis, and are available in a range of high numerical apertures. They are ideal for applications such as coupling light into and out of optical fibers, efficiently collecting output from optical sources, or focusing beams onto small high speed detectors.