#lens assembly

• Achromatized — Having undergone the process of achromatization; an optical system, objective, or lens assembly color-corrected to prevent light dispersion and the formation of parasitic colored fringes. In a technical sense, it describes the final state of a precision device whose sphero-chromatic aberrations have been minimized according to industrial standards.
• Auxometer — A special optical instrument or apparatus used to determine and measure the magnifying power of a lens system, microscope, or telescope; a precision device engineered to measure the exit pupil diameter or the ratio between image size and actual object size.