1. ALL DIMENSIONS ARE IN MILLIMETERS. Z7KB?1{G
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 @'NaA SB
TYPE: HZK21 CDGM NO.623581 O) =73e\
NP 1.6230 ± V ± 58.2 Gr"2G,,VI
STRIAE GRADE , ANNEAL 7y)|^4X2
MELT NO. -67f33
3. 'P' PITCH POLISH TO TEST PLATE WITHIN =`7)X\i@z
POWER AND IRREGULARITY INDICATED. >FEQtD~F
4. MANUFACTURE PER MIL-O-13830 T^=Ee?e
5. SURFACE QUALITY u1pYlu9IW
6. 'C' MAGNESIUM FLUORIDE COATING PER MI 4%c7#AX[T
FOR MAX TRANSMISSION AT MILLI u[6`Jr~
7. 'G' FINE GROUND & BLACKENED PER Fm[?@Z&wP
8. BEVEL EDGES AT 45 DEG TO MAX FA ek0;8Ds9
9. DIAMETER TO FLAT IS (REF) Jb)eC?6O
WITH SURFACE SAG OF ON SURFA