VIS Negative Achromatic Doublets

DL-NM

VIS Negative Achromatic Doublets
In stock
SKU
DL-NM
It is achromatic lens having a negative focal length. By setting the concave one bonding two lenses wavelength dispersion of the refractive index is different, can be smaller than the spherical single lens and spherical aberration and chromatic aberration.
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Name Diameter φD Focal length Delivery Price Add to cart
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Negative Achromatic Lens 25mm Diameter -49.94 Focal Length
DL-25-50NM
25mm −49.94mm
1-3 weeks
SGD 109.80
Material N-BAF10, N-SF10
Design wavelength 486.1nm, 546.1nm, 656.3nm
Coating Antireflection coating
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f −49.94mm
Edge thickness te 9.3mm
Center thickness tc 6.7mm
Back focal length fb −53.09mm
Centration <3′
i
Negative Achromatic Lens 25mm Diameter -99.94 Focal Length
DL-25-100NM
25mm −53.09mm
in stock
SGD 109.80
Material N-BAF10, N-SF10
Design wavelength 486.1nm, 546.1nm, 656.3nm
Coating Antireflection coating
Cement Ultraviolet Hardened Adhesive
Laser Damage Threshold 0.3J/cm2
Surface Quality (Scratch-Dig) 40-20
Diameter φD φ25mm
Focal length f −99.94mm
Edge thickness te 5.9mm
Center thickness tc 4.6mm
Back focal length fb −102.32mm
Centration <3′

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◦It is optimized focal length shift is small in the visible light range, the aberration is minimized.
◦It can be the beam expander of Galileo type in combination with achromatic lens with a focal length of the positive.

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