Negative achromatic lens

Negative achromatic lens
  • Negative achromatic lens, which is glued together by two optical components, corrects chromatic aberration and axial aberration. They are mainly used as focal length extenders of Barlow lens. They are usually used in positive achromatic mirror system and imaging system. They are plated with a single-layer MgF2 antireflection film at the central wavelength of 550nm.
  • Two piece achromatic lens is one of the simplest achromatic lenses. It can be divided into two types: Double gluing and double separation. Of course, achromatic lens can also be composed of multi chip lens, which depends on its use needs. Achromatic lenses with large aperture are usually separated. They are assembled in the frame and have excellent comprehensive performance.
  • For the double split lens, the gap between the two lenses is actually equivalent to the third lens, which can better eliminate the color difference than the glued lens. Therefore, it can balance the aberration in a wide range of wave bands and play a role in the field of broadband imaging.
Technical parameters
Items Parameters
Material optical glass, H-K9L (N-BK7)
Radius of curvature ± 1mm - ± 50000mm ± 1%
Diameter 3mm-200mm ± 0.1mm
Center thickness tolerance ± 0.05mm (we can process to ± 0.01mm with high precision)
Center deviation 3′(we can process to 30 ″with high precision)
Surface accuracy λ/ 8 (high precision, we can process to 1 / 10λ)
Surface quality 40/20 (we can process to 10-5 with high precision)
Effective caliber ≥90%
Coating multilayer antireflective film A:350-650nm B:650-1050nm
spectral curve

In addition, we have thousands of stock of K9 plano convex lens, biconvex lens, plano concave lens, biconvex lens, meniscus lens and so on. The price is preferential and the quality is excellent, which can meet your demand for a small order. 

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