Lenses are for alignment

Micro Machine Lenses (MMLs) are ultracompact, low-mass lenses based on a telecentric optical design that are for applications including machine-vision alignment, image gauging, and surface inspection. Three different fixed-magnification MML lenses for IR applications are available. They offer 4X, 6X, and 8X magnification, respectively, and all have a working distance of 80 mm.
Moritex
Cambridge, UK
www.moritex.com