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Negative_Double-Model

Negative Achromats

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Negative Achromats consist of two optical components, a crown and a flint glass lens, cemented together. The crown is usually a bi-concave lens. As is true to all Achromats, they are corrected for color and on-axis spherical aberration. They are used predominantly to extend focal lengths in combination with positive achromatic systems or CCD lenses.

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Diameter Dia. Tolerance CT Tolerance Centering Irregularity Surface Quality Bevel
6.00-25.00 +0.00 / -0.10 ±0.2 < 3 minutes 0.50 Waves 40-20 0.25 x 45°
25.01 - 50.00 +0.00 / -0.10 ±0.2 < 3 minutes 0.50 Waves 60-40 0.50 x 45°
Dimensions MM
Clear Aperture CA >= 90% of Diameter
Coating 1/4wave MgF2 @ 550nm (See Coating Chart for Available Options)
Design Wavelength 587.6nm
Focal Length Tolerance ±2%
Edge Thickness Reference
* All dimensions are in mm
Negative_Double-Model
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Part Numberiam here Diameter Effective Focal Length Back Focal Length Center Thickness Edge Thickness  
L-AON012 31.5 -100 -103.8 7.8 10.7 Add to Quote
L-AON009 26.4 -109 -111.7 6.25 8.15 Add to Quote
L-AON008 25.4 -125 -128.2 5.75 7.3 Add to Quote
L-AON006 18 -50 -52.4 4.7 6.6 Add to Quote
L-AON005 10 -25 -26.5 3.25 4.45 Add to Quote
L-AON004 10 -20 -21 3.5 4.95 Add to Quote
L-AON003 8 -20 -21.3 2.8 3.6 Add to Quote