1. ALL DIMENSIONS ARE IN MILLIMETERS. iv],:|Mbd
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 /<-=1XJI
TYPE: HZK21 CDGM NO.623581 Ek_<2!%X
NP 1.6230 ± V ± 58.2 =w:)AWZ
STRIAE GRADE , ANNEAL CGb4C(%-7
MELT NO. bVa?yWb.
3. 'P' PITCH POLISH TO TEST PLATE WITHIN MXDCOe~07
POWER AND IRREGULARITY INDICATED. 1*6xFn
4. MANUFACTURE PER MIL-O-13830 =\MAz[IDj
5. SURFACE QUALITY 5eyB\>k,
6. 'C' MAGNESIUM FLUORIDE COATING PER MI W|E %
FOR MAX TRANSMISSION AT MILLI `PI*\t0
7. 'G' FINE GROUND & BLACKENED PER iweT@P`
8. BEVEL EDGES AT 45 DEG TO MAX FA _7qa~7?f
9. DIAMETER TO FLAT IS (REF) E.0J94>iM
WITH SURFACE SAG OF ON SURFA