angle of aperture造句

• The practical optician names such systems : " corrected for the angle of aperture u * ( the height of incidence h * ) or the angle of field of view w * ."
• The rays with an angle of aperture smaller than u * would not have the same distance of intersection and the same sine ratio; these deviations are called " zones, " and the constructor endeavors to reduce these to a minimum.
• In order to render spherical aberration and the deviation from the sine condition small throughout the whole aperture, there is given to a ray with a finite angle of aperture u * ( width infinitely distant objects : with a finite height of incidence h * ) the same distance of intersection, and the same sine ratio as to one neighboring the axis ( u * or h * may not be much smaller than the largest aperture U or H to be used in the system ).