Achromatiniai lęšiai

Achromatiniai lęšiai

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Material All type of material are available to design the optimal achromats
Diameter tolerance +0/-0.1 mm
Thickness tolerance ±0.1 mm
Clear Aperture >90%
Focal Length Tolerance +-3%
Surface quality 60-40 S-D
Surface figure <λ/4 @ 632.8 nm
Centration error <3 arcmin
Protective chamfers <0.25 mm x 45°
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Cemented achromatic duplet lenses are optimized to provide excellent chromatic and spherical aberrations free performance. Optimized composition of two lenses, where one is made of dense flint and second of crown glass, assures much tighter focus than singlet spherical lenses due to minimized longitudinal and transverse spherical aberrations. They also feature nearly constant focal length across wide range of wavelengths. Standard achromatic duplet lenses cover two ranges – visible (400 nm – 700 nm) and near infrared (700 nm – 1050 nm). Single line, dual line and different than standard broadband configurations are also available. If you do not have design or drawing of required achromatic lens, Altechna engineers will help you to make one. Please contact Altechna by phone or email for drawings and Zemax