... for each of the three times;and 3) the locations of the solder defects were noted on each of the seventy-fiveboards. The Multi-Vari results indicated that there was little variation in the three ... measured oneach of the twelve lenses; they were cylinder (i.e., the curvature in the front side of the lens), cylinder BP side (i.e., the curvature in the back side of the lens), ultra-violet absorbence, ... the ratio of the hole size in the board to the lead diameter in the I.F. cans. That tookone day of trial and error, but we got the defect rate down to zero ppm—not badfor one-and-a-half-day’s...