|My Account | Shopping Cart
Achromatic doublet lenses ("achromat") are designed to eliminate chromatic and spherical aberrations inherent in singlet lenses. When used on-axis, an achromatic lens focuses an parallel input beam to a perfect "point", limited only by the effects of diffraction. This performance can be achieved over a broadband of wavelength. Achromatic lenses can be used to collimate and focus laser beams. They can also be used for high-quality imaging on-axis. However, the off-axis performance is significantly worse than the on-axis performance. If your application requires good optical performance off-axis as well as on-axis, multi-element lenses such as our digital imaging lenses are recommended.
For some applications it is desirable to have a high-quality lens with a lower f/# (for example, collimating a diode laser with large divergence angle). This can be done by adding a matching aplanatic meniscus lens to a doublet lens. An aplanatic meniscus lens will shorten the focal length of the doublet lens (thus, lowering the F-num) without introducing additional spherical aberrations.
The following is the listing of our standard achromatic lenses. They are all designed to achieve a wave-front aberration <1/4 wavelength. You can also use lens design wizards to design custom achromatic lenses. Achromatic elements have a Minimum Order Quantity (MOQ) ranging from 100 to 1,000 units.