Positive meniscus lenses are used to decrease the focal length of another lens while maintaining the angular resolution of the optical assembly. These lenses are commonly used to achieve tighter beam ...
Changchun Yutai optics company can produce convex concave lenses according to drawing or request. 1.Materials of the lens can be K9 glass, fused silica,ZF3,F4 and so on( CDGM glass);(Also available ...
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