Romeo I. Mercado

Color-corrected optical systems

Color-corrected optical systems and method of selecting optical materials therefor

Catadioptric imaging system with dioptric assembly of the petzval type

Three-glass photographic objective color-corrected at four wavelengths

Color-corrected lens systems

Color-corrected Petzval lens systems

Lens doublet color-corrected for visible and near-infrared wavelengths

Long-focus color-corrected petzval-type optical objective

Color-corrected prism systems

Optical system of the Petzval type