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A single lens used to form an image will always show some chromatic aberration, that is variation of focal length with wavelength. Achromatic doublet lenses correct for this as they are constructed from two different glass types and designed to remove first order chromatic aberration. Generally spherical aberration is reduced at the same time. Achromatic doublets are widely used to form images, for example telescope objectives, and also to focus laser beams.

These quality achromats have been designed and optimised for performance and are available as positive and negative focal length types. We stock a full range of doublet lenses from small 3mm dia up to 110mm dia to meet a range of demanding applications. Typical applications where achromatic doublet lenses are used are imaging, analysers, fibre-optic lighting, laser range finders endoscopes and borescopes.

We can offer custom achromatic doublet lenses to meet your requirements or alternatively edge stock lenses for a quick turnaround, please enquire.

Typical Material:

Diameter:
Centring Accuracy:
Focal Length:
Surface Quality:
Flint (N/F2) or equivalent and Crown (BK7) or equivalent Flint (SF6) or equivalent and Crown (N-LAK22) or equivalent
+0.0 / -0.10mm
< 5 arcmin
± 0.1% (≤ 10mm) ± 1% (>10mm)
<40-20 scratch/dig

Mounting into lens cells.
Special AR coatings.
Cutting to special sizes.
Stock lenses can be edged to smaller diameters.

Coating:
Flint element AR coated for high index in the visible:
Single layer MgF2 AR for high index, R.avg<0.2%@550nm 
Crown element AR coated for low index in the visible:
Single layer MgF2 AR, R.avg<0.2%@550nm 
Some combinations are coated with broadband multilayer AR coating for extended visible:
Broadband Multilayer AR, R.avg<0.5%@450-900nm

16 Items

Name Type Focal Length (mm) Diameter (mm) Back Focal Length (mm) Design Aperture (mm) Centre Thickness (mm) Edge Thickness (mm) Price Buy
LDB7525 Positive 75 25 70.41 23.2 9.5 6.97
$61.79
LDB5025 Positive 50 25 45.1 23.5 10.3 6.6
$61.79
LDB500110 Positive 500 110
$665.81
LDB4010 Positive 40 10 38 9 4.3 3.5
$48.58
LDB4006 Positive 40 6.25 38.5 5.3 3.3 3
$48.58
LDB2506 Positive 25 6.25 23.4 5.3 3.6 3.2
$48.58
LDB25050 Positive 250 50 245.2 48.2 9.6 6.7
$119.47
LDB2505 Positive 25 4.7 23.45 4.2 3.2 2.73
$47.89
LDB2005 Positive 20 4.7 18.25 4.2 3.6 3
$49.97
LDB1606 Positive 16 6.25 14.2 5.3 4 3.3
$48.58
LDB1306 Positive 12.5 6.25 10.5 5 4.4 3.5
$48.58
LDB1006 Positive 10 6.25 7.6 4.8 5.7 4.4
$49.97
LDB10040 Positive 100 40 94.2 38 11.8 7.2
$100.71
LDB10025 Positive 100 25 96.8 23 7 5.2
$61.79
LDB0806 Positive 8 6.25 5 5.3 5.8 4.3
$48.58
LDB0504 Positive 5 4 3.1 3.3 3.6 2.7
$49.97

16 Items

1

Doublet Lenses

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