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EFL=138.8mm , Cemented Achromatic Doublets (ACD)

EFL=138.8mm , Cemented Achromatic Doublets (ACD)

Normaler Preis $55.00 USD
Normaler Preis Verkaufspreis $55.00 USD
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Diameter
Effective Focal Length
Coating

EFL=138.8mm
AR Coating = 420-900nm
Material = H-ZF6&H-ZK14
R1, R2, R3 =-20.04mm,-42.17mm,26.3mm
Tc1, Tc2 = 22.2mm,11.9mm

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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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