Achromatic-lens Sentence Examples
 achromatic-lens 
- A similar argument may be applied to find at what point an achromatic lens becomes sensibly superior to a single one. 
- If not, the substitution of an achromatic lens will be of no advantage. 
- Calculation shows that, if the aperture be s in., an achromatic lens has no sensible advantage if the focal length be greater than about II in. Advertisement