1. ALL DIMENSIONS ARE IN MILLIMETERS. {EL
J!o[
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 2z+-vT%
TYPE: HZK21 CDGM NO.623581 </@3}rfUPg
NP 1.6230 ± V ± 58.2 _ giZ'&l!
STRIAE GRADE , ANNEAL l+n0=^ Z
MELT NO.
~d\>f
3. 'P' PITCH POLISH TO TEST PLATE WITHIN Sb,lY<=
POWER AND IRREGULARITY INDICATED. p+7ZGB
4. MANUFACTURE PER MIL-O-13830 !%,k]m'
5. SURFACE QUALITY E3`&W8
6. 'C' MAGNESIUM FLUORIDE COATING PER MI }bM=)eUfX
FOR MAX TRANSMISSION AT MILLI (w/)u
7. 'G' FINE GROUND & BLACKENED PER _G1C5nkDl4
8. BEVEL EDGES AT 45 DEG TO MAX FA S#g=;hD
9. DIAMETER TO FLAT IS (REF) UP?]5x>
WITH SURFACE SAG OF ON SURFA