Specification

Attention

▶Achromatic lens is used when focusing an image at infinity or when making the point light source to collimated light. It does not provide sufficient optical performance when used in such as short-range imaging.

▶There is a direction of the incident parallel light with achromatic lens.

The radius of curvature is allowed to be incident parallel light from the side of (the surface indicated by arrows) small curvature surface.

If the parallel light incidents from the opposite side, then spherical aberration and chromatic aberration occur and the focused spot size will be large.

▶When used in the visible region, spherical aberration and chromatic aberration increase. In addition, the transmittance decreases.