1. ALL DIMENSIONS ARE IN MILLIMETERS. pqe
tYu
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 tX_eN
TYPE: HZK21 CDGM NO.623581 )v9[/
]*P
NP 1.6230 ± V ± 58.2 uu:)jx i
STRIAE GRADE , ANNEAL p#kC#{<nE
MELT NO. $1v5*E
3. 'P' PITCH POLISH TO TEST PLATE WITHIN ZUu^==a
POWER AND IRREGULARITY INDICATED. x\%egw
4. MANUFACTURE PER MIL-O-13830 =bDG|:+
5. SURFACE QUALITY 0b4OJ[
6. 'C' MAGNESIUM FLUORIDE COATING PER MI (gZ!o_
FOR MAX TRANSMISSION AT MILLI 6~}H3rvO}
7. 'G' FINE GROUND & BLACKENED PER "Wm~\)t(
8. BEVEL EDGES AT 45 DEG TO MAX FA 2
zy^(%a
9. DIAMETER TO FLAT IS (REF) Q@8[q l1l
WITH SURFACE SAG OF ON SURFA