Aspherical lenses are effective in the elimination of not only
spherical aberration, but also other forms of aberration generated
by lenses. Standa 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.
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.
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.
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Standard Specifications
Diameter Tolerance | +0.0, -0.15 mm |
Centration | <3 arc minutes |
Chamfer | 0.25 mm @ 45° |
Surface Figure | λ/4 @ 632.8 nm |
Surface Quality | 60-40 scratch & dig |
Design Wavelength | 632.8 nm |
AR Coatings | BBAR. Please refer to the Coatings Section |
Housing | none (optional) |
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