|
OPTICS GLOSSARY:
DIOPTER: Identifies refractive (light bending) capacity of a lens. In magnifiers, there is a direct correlation between focal length and diopter. To find diopter of a magnification lens: 1.) With eyes 10” above lens, move viewed object to the point the greatest distance below the lens where it remains in sharp focus. 2.) Measure distance and divide into 1 meter (39.37”). The result is your lens diopter.
|