1. ALL DIMENSIONS ARE IN MILLIMETERS. G_42ckLq
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 N<N!it
TYPE: HZK21 CDGM NO.623581 x:sTE u@
NP 1.6230 ± V ± 58.2 ]lZ!en
STRIAE GRADE , ANNEAL $ZQP f
MELT NO. ;"joebZ/
3. 'P' PITCH POLISH TO TEST PLATE WITHIN U]e;=T:3
POWER AND IRREGULARITY INDICATED. A`X$jpAn&
4. MANUFACTURE PER MIL-O-13830
x,>@IEN7
5. SURFACE QUALITY 6wnfAli.
6. 'C' MAGNESIUM FLUORIDE COATING PER MI [0MVsc=
FOR MAX TRANSMISSION AT MILLI /JR*X!&"
7. 'G' FINE GROUND & BLACKENED PER gtCd#t'(V
8. BEVEL EDGES AT 45 DEG TO MAX FA YM1@B`yWE
9. DIAMETER TO FLAT IS (REF) /7P4[~vw
WITH SURFACE SAG OF ON SURFA