1. ALL DIMENSIONS ARE IN MILLIMETERS. 1@Ba7>%'
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 yf{\^^ i(
TYPE: HZK21 CDGM NO.623581 _0[z
xOI
NP 1.6230 ± V ± 58.2 "t2T*'j{
STRIAE GRADE , ANNEAL hyxv+m[
MELT NO. 4lo7yx
3. 'P' PITCH POLISH TO TEST PLATE WITHIN 1P]J3o
POWER AND IRREGULARITY INDICATED. R0M>'V?e
4. MANUFACTURE PER MIL-O-13830 x.t<@y~
5. SURFACE QUALITY qJ" (:~
6. 'C' MAGNESIUM FLUORIDE COATING PER MI zDg*ds\
FOR MAX TRANSMISSION AT MILLI R/u0,
7. 'G' FINE GROUND & BLACKENED PER 4n#u?)
8. BEVEL EDGES AT 45 DEG TO MAX FA mjOxmwo
9. DIAMETER TO FLAT IS (REF) l(Y32]Z
WITH SURFACE SAG OF ON SURFA