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EFL=137.5mm , Cemented Achromatic Doublets (ACD)

EFL=137.5mm , Cemented Achromatic Doublets (ACD)

Regular price $65.00 USD
Regular price Sale price $65.00 USD
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Diameter
Effective Focal Length
Coating

EFL=137.5mm
AR Coating = 420-900nm
Material = H-ZF6&H-K51
R1, R2, R3 =-73.498mm,-70.54mm,28.0894mm
Tc1, Tc2 = 16.51mm,6.97mm

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Common Specification

Legend

  • Dia. = Diameter
  • R = Radius of Curvature
  • ET = Edge Thickness
  • EFL = Effective Focal Length
  • CT = Center Thickness
  • P = Principle Point
  • BFL = Back Focal Length
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Benefit of Achromatic Doublets

An achromatic lens is far superior to a simple lens for multi-color "white light" imaging. The two elements composing an achromatic lens (literally, "a lens with no color") are paired together for their ability to correct the color separation inherent in glass. Having eliminated the problematic chromatic aberrations, an achromatic lens becomes the most cost-efficient means for good polychromatic illumination and imaging. Refer to Figure 8 for an illustration of this concept.

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