Description

Conventional microscope objectives are not ideal for laser focusing, being designed for finite conjugates and usually having more elements and higher reflection losses than necessary for this application.  We therefore offer here several ranges of laser lenses in standard objective mounts, parfocal at 45mm where possible, to fit directly into spatial filters, etc.

The doublets (OD series) give diffraction limited performance and being achromatic can also be used for microscopy, see positive and negative Achromatic doublets for more details. 

The OI series have larger aperture with similar performance (not achromatic) by adding a supplementary meniscus lens (see TI series).

The singlets (OPseries) are suitable for high powers, having no cemented interfaces, and have very high transmittance. Owing to the high-index glass used they still have a useful diffraction-limited aperture.

The OX series are also cement-free and comprise a singlet focusing lens with supplementary meniscus for greater NA (as TX combinations).