1. ALL DIMENSIONS ARE IN MILLIMETERS. \fC}l
Ll
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 )eWg2w ]
TYPE: HZK21 CDGM NO.623581 ld'Aaxl&
NP 1.6230 ± V ± 58.2 h{Y#. j~aS
STRIAE GRADE , ANNEAL ;hPo5uZQ
MELT NO. gd ; e-.
3. 'P' PITCH POLISH TO TEST PLATE WITHIN oz?6$oE(bt
POWER AND IRREGULARITY INDICATED. {qBbzBG
4. MANUFACTURE PER MIL-O-13830 btB> -pT
5. SURFACE QUALITY S]DYEL$
6. 'C' MAGNESIUM FLUORIDE COATING PER MI ;gW?Fnry;
FOR MAX TRANSMISSION AT MILLI Y.8mgy>
7. 'G' FINE GROUND & BLACKENED PER j=w`%nh4"f
8. BEVEL EDGES AT 45 DEG TO MAX FA j*1O(p+
9. DIAMETER TO FLAT IS (REF) 12yX`9h>
WITH SURFACE SAG OF ON SURFA