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Reflectance spectrophotometry of bruising in potatoes. II. acquisition of spectra in the visible spectrum with an integrating sphere
Solanum tuberosum L. quality damage internal
2008/11/12
Diffuse reflectance spectra from 400 to 700 nm were measured with an integrating sphere from bruised and unbruised, unpeeled and peeled tubers cvs. Desiree, Pentland Dell and Record. Stepwise discrimi...
Hybrid objective with corrected chromatism in visible spectrum
hybrid objective chromatic aberration apochromatic correction superachromatic correction
2011/4/25
The possibilities of chromatic aberration correction in a hybrid (diffractive-refractive) objective are discussed. It is possible to design a hybrid triplet objective free from chromatic aberration in...