SPHERICAL ABERRATION
\sfˈɛɹɪkə͡l ˌabəɹˈe͡ɪʃən], \sfˈɛɹɪkəl ˌabəɹˈeɪʃən], \s_f_ˈɛ_ɹ_ɪ_k_əl ˌa_b_ə_ɹ_ˈeɪ_ʃ_ə_n]\
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By DataStellar Co., Ltd
By Willam Alexander Newman Dorland
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In the refraction of light by a lens, an inequality in the degree of convergence of the rays from different portions of the lens, producing a series of images at different focal distances, so called because the character of the a. is due to the fact that the surface of the lens is a segment of a sphere. [Lat.]
By Smith Ely Jelliffe
Word of the day
Health Personnel Attitudes
- Attitudes of personnel toward their patients, other professionals, the medical care system, etc.