Protective windows can be attached to the focusing lens to minimize damage from laser processing.
These objectives, 22 mm in length, are manufactured with a synthetic fused silica material and have a high transmission value in the ultraviolet wavelength range of 180 - 400 nm.
With its long working distance and field curvature correction, a natural observation image is achieved to the periphery of the field of view.

OSE-PAL-NUV

With its long working infinity correction function, this objective can be used for a laser system and coaxial observation. It is also used for near UV light observation.