Precision Polished Aspheric Lenses

Our uncoated precision polished aspheric lenses are computer-optimized to achieve diffraction limited optical performance over high numerical apertures without requiring multiple elements. This may be used to reduce weight, complexity and cost for optical systems.

Uncoated L-BAL 35 (589/611) substrates
Computer optimized to provide diffraction limited performance
Low f-numbers for optimal light gathering and focusing
Reduces spherical aberrations

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Showing 10 of 16 total products

Compatibility:

Description	Compatibility	Lens Shape	Diameter	Effective Focal Length (EFL)	F/#	Avail.	Price
KPA10Polished Aspheric Lens, Plano-Convex, L-BAL35, 15 mm, 22.5 mm EFL, Uncoated	UNIVERSAL	Plano-Convex Aspheric	15.0 mm	22.5 mm	1.5	In Stock	$365
KPA11Polished Aspheric Lens, Plano-Convex, L-BAL35, 15 mm, 18.75 mm EFL, Uncoated	UNIVERSAL	Plano-Convex Aspheric	15.0 mm	18.8 mm	1.3	Contact Us	$365
KPA12Polished Aspheric Lens, Plano-Convex, L-BAL35, 15 mm, 15.0 mm EFL, Uncoated	UNIVERSAL	Plano-Convex Aspheric	15.0 mm	15.0 mm	1	In Stock	$377
KPA13Polished Aspheric Lens, Plano-Convex, L-BAL35, 15.00 mm, 11.25 mm EFL, Uncoated	UNIVERSAL	Plano-Convex Aspheric	15.0 mm	11.3 mm	0.8	7 Weeks	$385
KPA14Polished Aspheric Lens, Bi-Convex, L-BAL35, 20 mm, 20.0 mm EFL, Uncoated	UNIVERSAL	Bi-Convex Aspheric	20.0 mm	20.0 mm	1	In Stock	$409
KPA15Polished Aspheric Lens, Bi-Convex, L-BAL35, 20 mm, 15.0 mm EFL, Uncoated	UNIVERSAL	Bi-Convex Aspheric	20.0 mm	15.0 mm	0.8	In Stock	$432
KPA16Polished Aspheric Lens, Plano-Convex, L-BAL35, 25 mm, 37.5 mm EFL, Uncoated	UNIVERSAL	Plano-Convex Aspheric	25.0 mm	37.5 mm	1.5	In Stock	$415
KPA17Polished Aspheric Lens, Plano-Convex, L-BAL35, 25 mm, 31.25 mm EFL, Uncoated	UNIVERSAL	Plano-Convex Aspheric	25.0 mm	31.3 mm	1.3	4 Weeks	$417
KPA18Polished Aspheric Lens, Plano-Convex, L-BAL35, 25 mm, 25.0 mm EFL, Uncoated	UNIVERSAL	Plano-Convex Aspheric	25.0 mm	25.0 mm	1	Contact Us	$438
KPA19Polished Aspheric Lens, Plano-Convex, L-BAL35, 25 mm, 18.75 mm EFL, Uncoated	UNIVERSAL	Plano-Convex Aspheric	25.0 mm	18.8 mm	0.8	2 Weeks	$455

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Mounting Options

We offer a full range of optical lens mounts to meet various experimental requirements. Below lists the recommended mounts for spherical lenses of standard sizes. Please see our Lens Mount Guide for additional information.

Note: besides the diameter, please check the Edge Thickness (T_e) specification of the lens and the lens mount to ensure compatibility before purchasing.

Lens Diameter	A-Line™ Lens Mounts	LT Series Lens Tubes	LP Series Lens Positioners	Optics Cage Plus Series
76.2 mm	()	N/A	N/A	N/A
50.8 mm	()			N/A
38.1 mm	()	LT20 lens tube with adapter	LP-2 lens positioner with adapter	N/A
25.4 mm	()
12.7 mm	()			N/A
6.35 mm	with adapter	LT05 lens tube with adapter	LP-05 lens positioner with adapter	N/A

For non-standard sizes not listed above, check out our variable size lens mounts.

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.