1. ALL DIMENSIONS ARE IN MILLIMETERS. ;mwnAO
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 zf^|H%
~^
TYPE: HZK21 CDGM NO.623581
fWi/mK3c
NP 1.6230 ± V ± 58.2 asCcBp
STRIAE GRADE , ANNEAL SZR`uS
MELT NO. M,bs`amz
3. 'P' PITCH POLISH TO TEST PLATE WITHIN A%^7D.j
POWER AND IRREGULARITY INDICATED. )%n$_N n
4. MANUFACTURE PER MIL-O-13830 [9NrPm3d
5. SURFACE QUALITY ?`O^;f
6. 'C' MAGNESIUM FLUORIDE COATING PER MI 27$,D XD
FOR MAX TRANSMISSION AT MILLI &,{YfAxQ`
7. 'G' FINE GROUND & BLACKENED PER \[*q~95$v
8. BEVEL EDGES AT 45 DEG TO MAX FA apfr>L3
9. DIAMETER TO FLAT IS (REF) n%4/@M
WITH SURFACE SAG OF ON SURFA