Asferiniai lęšiai

Asferiniai lęšiai

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Diameter Tolerance +0.0/ -0.15mm
Thickness tolerance ±0.1 mm
Clear aperture >90%
Focal Length Tolerance ±3 %
Design wavelength 632.8 nm
Surface quality 60-40 S-D
Surface figure <λ/4 @ 632.8 nm
Centration error <3 arcmin
Protective chamfers <0.25 mm x 45°
Coatings Available on request
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Altechna provides computer calculations and designing of aspherical lenses without spherical aberrations as well as low cost production of aspherical lenses made of Fused Silica, BK7 glass or other material upon your request. Our long time experience in production of aspherical elements lead to the development of low-cost, high image quality and high performance products.

Properties and Spherical Aberration of Standard Spherical Lenses
Aspherical lens is produced by exactly cutting away some part of a spherical surface. A standard spherical lens has the undesirable property (called spherical aberration) of causing a stronger diffraction of light rays the further it is from the optical axis of the lens. The spherical aberration causes a loss of image sharpness.

Properties of Aspherical Lenses
Properly designed aspherical lenses fully compensate spherical aberrations. Aspherical lenses are effective in the elimination of not only spherical aberration, but also other forms of aberration generated by lenses. Aspherical lenses are also used to compensate for distortion aberration.
varna Used in applications to reduce beam distortion
varna Other dimensions are available in small and mass production quantities
varna Various AR Coatings are available for all these lenses.

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Items per page page
Diameter, mm Effective Focal length, mm NA Optimal Wavelength range, nm Delivery Product ID Price Action
6.33 4.00 0.60 400-700 Request 1-ASL-1-A633-[7A00] Request REQ
4.70 4.50 0.42 400-700 Request 1-ASL-1-B470-[7A00] Request REQ
7.20 6.24 0.40 400-700 Request 1-ASL-1-C720-[7A00] Request REQ
9.94 8.00 0.50 400-700 Request 1-ASL-1-D994-[7A00] Request REQ
7.20 11.00 0.25 400-700 Request 1-ASL-1-E720-[7A00] Request REQ
6.50 15.29 0.16 400-700 Request 1-ASL-1-F650-[7A00] Request REQ
6.50 18.40 0.15 400-700 Request 1-ASL-1-G650-[7A00] Request REQ
6.33 4.00 0.60 600-1050 Request 1-ASL-2-A633-[7B00] Request REQ
4.70 4.50 0.42 600-1050 Request 1-ASL-2-B470-[7B00] Request REQ
7.20 6.24 0.40 600-1050 Request 1-ASL-2-C720-[7B00] Request REQ
9.94 8.00 0.50 600-1050 Request 1-ASL-2-D994-[7B00] Request REQ
7.20 11.00 0.25 600-1050 Request 1-ASL-2-E720-[7B00] Request REQ
6.50 15.29 0.16 600-1050 Request 1-ASL-2-F650-[7B00] Request REQ
6.50 18.40 0.15 600-1050 Request 1-ASL-2-G650-[7B00] Request REQ

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