1. ALL DIMENSIONS ARE IN MILLIMETERS. Z}\,rex
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 &QW&K
TYPE: HZK21 CDGM NO.623581 Y~{<Hs
NP 1.6230 ± V ± 58.2 U!uJ )mm
STRIAE GRADE , ANNEAL "9QZX[J|*
MELT NO. =SeQ- H#
3. 'P' PITCH POLISH TO TEST PLATE WITHIN S5ai@Ksf
POWER AND IRREGULARITY INDICATED. a@|H6:|
4. MANUFACTURE PER MIL-O-13830 UQ;2g\([
5. SURFACE QUALITY fpC":EX@r
6. 'C' MAGNESIUM FLUORIDE COATING PER MI kp<Au)u
FOR MAX TRANSMISSION AT MILLI ;|?_C8
7. 'G' FINE GROUND & BLACKENED PER
3F!)7
8. BEVEL EDGES AT 45 DEG TO MAX FA h%W,O,K/
9. DIAMETER TO FLAT IS (REF) D]}~` SO
WITH SURFACE SAG OF ON SURFA