collimator lenses造句

An infrared filter behind the mirror removes IR radiation from the output beam ( this may be omitted or inadequate in less-expensive " pointer-style " green lasers ), and the assembly ends in a collimator lens.
The collimator lens has the lower focal length and is placed closer to the light source, and the collector lens, which focuses the light into the triplet lens, is placed after the projection image ( an active matrix LCD panel in LCD projectors ).
The pilot / gunner need not position their head to align the sight line precisely as they did in two-point mechanical sights, head position is only limited to that determined by the optics in the collimator, mostly by the diameter of the collimator lens.
It's difficult to find collimator lenses in a sentence. 用collimator lenses造句挺难的