1. ALL DIMENSIONS ARE IN MILLIMETERS. RvYH(!pQ
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 m[C-/f^u|
TYPE: HZK21 CDGM NO.623581 ubIGs|p2c
NP 1.6230 ± V ± 58.2 .foM>UOY
STRIAE GRADE , ANNEAL b$nXljV4?
MELT NO. !c\d(u
3. 'P' PITCH POLISH TO TEST PLATE WITHIN 0!rU,74I=
POWER AND IRREGULARITY INDICATED. 2@o_7w98
4. MANUFACTURE PER MIL-O-13830 tH<v1LEZN
5. SURFACE QUALITY h@T}WZv
6. 'C' MAGNESIUM FLUORIDE COATING PER MI +n]U3b
FOR MAX TRANSMISSION AT MILLI iZQwo3"8r
7. 'G' FINE GROUND & BLACKENED PER Te~"\`omJ3
8. BEVEL EDGES AT 45 DEG TO MAX FA {hX.R
9. DIAMETER TO FLAT IS (REF) 0CxQ@~ttl
WITH SURFACE SAG OF ON SURFA