AIA/NAS 901-2013 pdf download TELESCOPES AND COLLIMATORS FOR OPTICAL TOOLING
ALL OUTSIDE DIAMETERS TO FIT THE SPHERICAL MOUNTS SHALL BE 2.2493 TO 2.2498 INCHESTHE CENTERLINE OF SIGHT SHALL BE LOCATED AT TRUE POSITION WITHIN .001 DIAMEER IN RELATION TO THEOUTSIDE DIAMETER
PARALLELISM OF CENTERLINE OF SIGHT WITH RESPECT TO HE OUTSIDE DIAMETER SHALL NOT EXCEED = 3 ARCSECONDS
THE CENTERLINE OF SIGHT TO REMAIN STRAIGHT FROM MINIMUM FOCUS TO 50 F. RANGE WIHIN 0.002INCHES AND FROM 50 FT.TO 100 FT.WITHIN 0.004 INCHES.
BARREL TO BE HEAT TREATED TO ROCKWELL C54-58.
OPTIONAL OPTICAL MICROMETER MEASURING RANGE TO BE WITHIN .001 OF AN INCH AT ANY INTERVALMEASURED FROM ZERO.