1. ALL DIMENSIONS ARE IN MILLIMETERS. FO q1>>a0
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 9j W2
TYPE: HZK21 CDGM NO.623581 lEHzyh}2k
NP 1.6230 ± V ± 58.2 p.+ho~sC,.
STRIAE GRADE , ANNEAL it] E-^2>
MELT NO. fDG0BNLY
3. 'P' PITCH POLISH TO TEST PLATE WITHIN % QKZT=}
POWER AND IRREGULARITY INDICATED. tmqY2.
4. MANUFACTURE PER MIL-O-13830 6JKqn~0Kk
5. SURFACE QUALITY JQ4{` =,b
6. 'C' MAGNESIUM FLUORIDE COATING PER MI Qs9gTBS;
FOR MAX TRANSMISSION AT MILLI }%Bl>M
7. 'G' FINE GROUND & BLACKENED PER ?wnzTbJN
8. BEVEL EDGES AT 45 DEG TO MAX FA U|g:`v7
9. DIAMETER TO FLAT IS (REF) )(y)A[
WITH SURFACE SAG OF ON SURFA