Material
All type of material are available to design the optimal achromats
Dimensions
3 – 200 mm
Surface quality, S-D
40-20, 60-40*
Surface irregularity, P-V
<λ/4 @ 632.8 nm*
Focal length tolerance
±1%
Centration error
<3 arcmin
AR coatings
On request
*depending on size and material
Cemented achromatic doublet lenses are optimized to provide excellent chromatic and spherical aberration-free performance. An optimized composition of two lenses in which one is made of dense flint and the other of crown glass, ensures a much smaller focus than singlet spherical lenses because of minimized longitudinal and transverse spherical aberrations. They also feature a nearly constant focal length across a wide range of wavelengths.
Standard achromatic doublet lenses cover two ranges – the visible (400 – 700 nm) and near-infrared (700 – 1050 nm). Single-line, dual-line and broadband configurations different from standard ones are also available.
If you do not have the designs or drawings for the required achromatic lenses, Altechna engineers can help you to make some. Feel free to reach out to us for drawings and Zemax files, information or any inquiries you may have at: [email protected]. We’re here to assist you!
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