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  • N-BK7 Windows and H-K9L Windows

    Made from BK7 material, which has transparent range from 330-2100nm. The refractive index is 1.5168 at 587.6nm. The BK7 window has good performance over visible and near IR spectrum for most application.

  • High Precision Achromatic Waveplate

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  • IR Windows Barium Fluoride BaF2 Window

    Barium fluoride (BaF2) shows good optical transmission over UV-IR windows in 0.15μm~12.5μm.

  • IR Windows Magnesium Fluoride MgF2 Windows

    MgF2 windows are used in the UV, visible and IR ranges, with approximately 94% transmission from 200 - 1000 nm, and approximately 95% transmission from 1-6µm

  • IR Windows Calcium fluoride CaF2 Windows

    CaF2 has transparent range from 170-7800nm. The refractive index is 1.399 at 5000nm. 1. Low absorption coefficient 2. High damage threshold, 3. Low Dispersion (with an Abbe Number of 95) 4. Low fluorescence 5. Excellent water, chemical, and heat resistance

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Achromatic Lens

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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
  • product orgin:

    China
  • shipping port:

    Fuzhou China
  • payment:

    T/T Payment, Western Union
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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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