1. ALL DIMENSIONS ARE IN MILLIMETERS. v8I{XU@%
2. MATERIAL: OPTICAL GLASS PER MIL-G-174 (X6sSO
TYPE: HZK21 CDGM NO.623581 2uk x (Z
NP 1.6230 ± V ± 58.2 zQH]s?v
STRIAE GRADE , ANNEAL lM#A3/=K
MELT NO. X['2b78k
3. 'P' PITCH POLISH TO TEST PLATE WITHIN @-#T5?
POWER AND IRREGULARITY INDICATED. 7W9~1
.SC
4. MANUFACTURE PER MIL-O-13830 !7U\J]
5. SURFACE QUALITY N8!TZ~1$
6. 'C' MAGNESIUM FLUORIDE COATING PER MI (D{Ys'{q
FOR MAX TRANSMISSION AT MILLI 'FzN[% K"
7. 'G' FINE GROUND & BLACKENED PER R:aYL~
8. BEVEL EDGES AT 45 DEG TO MAX FA S*)o)34U
9. DIAMETER TO FLAT IS (REF) uu%?K@Qq
WITH SURFACE SAG OF ON SURFA