1. ALL DIMENSIONS ARE IN MILLIMETERS. J'99
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 b[}f]pB@n
TYPE: HZK21 CDGM NO.623581 tNsiokOm
NP 1.6230 ± V ± 58.2 bvVEV
STRIAE GRADE , ANNEAL W$_}lE$
MELT NO. p9c`rl_N
3. 'P' PITCH POLISH TO TEST PLATE WITHIN M=vRy|TL
POWER AND IRREGULARITY INDICATED. ~zdHJ8tYp
4. MANUFACTURE PER MIL-O-13830 1eiV[z$?
5. SURFACE QUALITY XN+~g.0
6. 'C' MAGNESIUM FLUORIDE COATING PER MI v X=zqV
FOR MAX TRANSMISSION AT MILLI >(N0''eM]
7. 'G' FINE GROUND & BLACKENED PER /F#_~9JXG
8. BEVEL EDGES AT 45 DEG TO MAX FA C*O648yz[
9. DIAMETER TO FLAT IS (REF) Skm$:`u;
WITH SURFACE SAG OF ON SURFA