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Multi-Elemenet Optics-DL-NM (Negative achromatic lens)
DL-NM (Negative achromatic lens)
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 aberra
Specification
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 and the focused spot size will increase.
▶When used in the visible region, spherical aberration and chromatic aberration increases. In addition, the transmittance decreases.
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