1. ALL DIMENSIONS ARE IN MILLIMETERS. -[5yp 2F-{
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 Eg]tDPN1
TYPE: HZK21 CDGM NO.623581 8lT2qqlr
NP 1.6230 ± V ± 58.2 e?XQ,
STRIAE GRADE , ANNEAL Lq5Eu$;r
MELT NO. DI:"+KMq{
3. 'P' PITCH POLISH TO TEST PLATE WITHIN /m*+N9)
POWER AND IRREGULARITY INDICATED. .RWKZB
4. MANUFACTURE PER MIL-O-13830 E&2mFg
5. SURFACE QUALITY 7|pF(sb0
6. 'C' MAGNESIUM FLUORIDE COATING PER MI }!5+G:JAh
FOR MAX TRANSMISSION AT MILLI 83gp'W{|
7. 'G' FINE GROUND & BLACKENED PER U P e@>
8. BEVEL EDGES AT 45 DEG TO MAX FA L ]Dl}z
9. DIAMETER TO FLAT IS (REF) 9uA2M!~i2
WITH SURFACE SAG OF ON SURFA