Precision optical glass achromatic Lenses (Doublets)

Achromatic Lenses (Doublets)

VIS 0° and VIS-NIR coated achromats are also available

Correct for on-axis spherical and chromatic aberrations
Custom Achromatic Lenses Available



Precision optical glass achromatic Lenses (Doublets)


AchromaticLenses(Doublets) consists of a positive low-index Crown Glass lens element cemented to a negative high-index Flint Glass lens element. The elements are chosen so as to cancel chromatic aberration at two well-separated wavelengths, usually in the blue and red region of the spectrum. Focal length is constant at those two wavelengths and focal length shifts are virtually eliminated across the visible wavelengths. One frequent use is to achieve diffraction limited focusing of a laser beam. Negative Achromat is typically used when there is a need to eliminate chromatic aberration. In addition to reducing chromatic aberration at the design wavelengths, spherical aberration and coma are greatly reduced.


Specification

Material:

 low-index Crown Glass& high-index Flint Glass CDGM, Schott, Ohara etc
Dimension Tolerance:
 ±0.1mm(Standard), ±0.01mm(High Precision)
Center Thickness Tolerance:
 ±0.1mm(Standard), ±0.05mm(High Precision)
Paraxial Focal Length:
 ±2%
Surface quality:
 60/40(Standard), 20/10(High Precision)
Clear Aperture:
 >85%
Surface Figure:
 λ/2(Standard), λ/4(High Precision) @633nm
Centration:
 3 arc minutes
Bevel:
 <0.25mm×45°
Coating:
Upon requirement

Negative Achromatic LensesPosistive Achromatic Lenses

Typical Size

Material N-BK7&N-SF5
Item No. Φ(mm) f(mm) R(mm) R(mm) R(mm) Tc(mm) Te(mm) Fb(mm)
ALP001 6 15 8.831 -6.55 -19.77 2.71 1 13.07
ALP002 6 20 12.36 -8.51 -24.38 2.6 1 18.29
ALP003 6 25 15.7 -10.67 -29.99 2.3 1 23.46
ALP004 6 30 18.88 -12.94 -36.48 1.9 1 28.69
ALP005 8 25 15.6 -10.81 -30.48 2.9 1 23.13
ALP006 8 30 18.88 -12.88 -36.22 2.7 1 28.28
ALP101 10 20 12.32 -9.02 -25.23 3.8 1 17.63
ALP102 12 25 15.35 -11.35 -31.92 4.2 1.3 22.29
ALP103 12.7 30 18.54 -13.49 -37.84 4 1.3 27.36
ALP104 12.7 40 25.23 -17.54 -48.75 3.4 1.3 37.78
ALP105 12.7 50 31.26 -21.93 -62.37 3.1 1.3 47.99
ALP106 12.7 60 37.33 -26.42 -75.86 2.8 1.3 58.13
ALP107 12.7 75 46.77 -32.96 -94.62 2.6 1.3 73.23
ALP108 13 40.5 25.41 -18.07 -50.47 3 1.3 38.48
ALP109 14 44 27.54 -19.54 -54.95 3.3 1.3 41.83
ALP110 18 40 24.27 -18.37 -53.09 5.4 1.5 36.51
ALP111 18 50 31.69 -22 -60.57 4.8 1.5 46.99
ALP112 18 60 37.84 -26.49 -73.79 4.1 1.5 57.3
ALP201 25.4 60 37.33 -27.16 -75.86 7 2 55.57
ALP202 25.4 120 73.28 -54.33 -159.9 4.2 2 117.1
ALN101 12.7 -25 -15.28 13.37 39.17 1.5 2.5 -26.61
ALN102 12.7 -30 -24.72 19.1 56.1 1.5 2.5 -41.56
ALN201 25.4 -40 -29.79 26.85 82.41 2 4.3 -52.66


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