Negative Achromatic Lens 25mm Diameter -49.94 Focal Length

DL-25-50NM

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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.

Details

◦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.

More Information

More Information
Name	Negative Achromatic Lens 25mm Diameter -49.94 Focal Length
Weight	0.0050kgs
Standard Coatings Available	No
Guide	For custom focal lengths and diameter sizes not listed on-line or in our catalog please contact our Sales Division.
Remark	-
Attention	There is a direction to the incident parallel light to the achromatic lens. A surface with a small radius of curvature is allowed to be incident parallel light from a rear surface (the surface on the arrow is pointing to). When it is incident parallel light from the opposite side, spherical aberration and chromatic aberration will occur. When used in the visible region, spherical aberration and chromatic aberration increases. In addition, the transmittance decreases.
Image Label	Negative Achromatic Lens 25mm Diameter -49.94 Focal Length
Diameter φD	25mm
Focal length	−49.94mm
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′

In stock

SKU

DL-25-50NM

$94.00

Negative Achromatic Lens 25mm Diameter -49.94 Focal Length

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