Illustration of achromatic lens
- A light source
- B crown glass
- C flint glass
- D corrected wavelength focal point
achromatic lens
noun
: a lens made by combining lenses of different glasses having different focal powers so that the light emerging from the lens forms an image practically free of chromatic aberration
Word History
First Known Use
1796, in the meaning defined above
Medical Definition
achromatic lens
noun
: a compound lens made by combining lenses of different glasses (as flint glass and crown glass) with different focal powers so that the light emerging from the lens forms an image almost free from unwanted colors