Certifications

DL-25-100NM

Negative Achromatic Lens 25mm Diameter -99.94 Focal Length

Product Code Description Lead Time Price Quantity Buy / Get Quote
DL-25-100NM Negative Achromatic Lens 25mm Diameter -99.94 Focal Length Please Call £76.00
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Specifications

Back Focal Length Fb:

−102.32mm

Diameter:

25mm

Eccentricity:

3'

Focal Length F:

−99.94mm

Thickness of the Center Tc:

4.6mm

Thickness of the Edge TE:

5.9mm

Weight:

0.002kg

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.

• 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.
• It is also corrected for astigmatism and comatic aberration off-axis as well as aberration of axial object point.

• For custom focal lengths and diameter sizes not listed on-line or in our catalog please contact our Sales Team.

• 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 and the focused spot size will increase.
• When used in the visible region, spherical aberration and chromatic aberration increases. In addition, the transmittance decreases.