NEWTONIAN TYPE MIRROR BLANKS
(APPROXIMATE MEASUREMENTS)
DESCRIPTION
| DIAMETER | WEIGHT | THICKNESS |
SAG |
RC |
FL |
F/D |
PART# |
4.25" |
.750" |
1.00 |
0.066" |
34" |
17" |
F/4 |
NPX425.40 |
4.25" |
.750" |
1.00 |
0.044" |
51" |
25.5" |
F/6 |
NPX425.60 |
4.25" |
.750" |
1.00 |
0.033" |
68" |
34" |
F/8 |
NPX425.80 |
4.50" |
.750" |
1.00 |
0.036" |
72" |
36" |
F/8 |
NPX450.80 |
6.00" |
1.000" |
2.25 |
0.094" |
48" |
24" |
F/4 |
NPX600.40 |
6.00" |
1.000" |
2.25 |
0.075" |
60" |
30" |
F/5 |
NPX600.50 |
6.00" |
1.000" |
2.25 |
0.063" |
72" |
36" |
F/6 |
NPX600.60 |
6.00" |
1.000" |
2.25 |
0.047" |
96" |
48" |
F/8 |
NPX600.80 |
8.00" |
1.375" |
5.75 |
0.100" |
80" |
40" |
F/5 |
NPX800.50 |
8.00" |
1.375" |
5.75 |
0.083" |
96" |
48" |
F/6 |
NPX800.60 |
8.00" |
1.375" |
5.75 |
0.063" |
128" |
64" |
F/8 |
NPX800.80 |
8.00" |
1.375" |
5.75 |
0.050" |
160" |
80" |
F/10 |
NPX800.100 |
10.00" |
1.750" |
11.25 |
0.139" |
90" |
45" |
F/4.5 |
NPX1000.45 |
10.00" |
1.750" |
11.25 |
0.104" |
120" |
60" |
F /6 |
NPX1000.60 |
10.00" |
1.750" |
11.25 |
0.078" |
160" |
80" |
F/8 |
NPX1000.80 |
10.00" |
1.750" |
11.25 |
0.063" |
200" |
100" |
F/10 |
NPX1000.100 |
12.50" |
2.125" |
21.50 |
0.130" |
150" |
75" |
F/6 |
NPX1250.60 |
12.50" |
2.125" |
21.50 |
0.098" |
200" |
100" |
F/8 |
NPX1250.80 |
13.10" |
1.620" |
27.00 |
0.202" |
130" |
65" |
F/4.5 |
NPX1310.45 |
Other*
The Newtonian-type blanks are molded with the F/D curve on one face and the second face is surface ground flat. The blanks are all fine annealed Pyrex® 7740. Precision annealed blanks are available on request.
Grinding tools (plate glass) can be purchased elsewhere in this catalog. The requisite tools have a convex curve molded on one face that corresponds to the F/D curves on the mirror blanks listed above.
The F/D curves have been molded into the mirror and tool blanks to assist the fabricator in generating the desired curve in a shorter period of time.
*See custom Newtonian mirror blanks.
CUSTOM NEWTONIAN MIRROR BLANKS
Note: Other sizes can be made to the fabricator's specifications up to 40 inches in diameter subject to certain limitations. To facilitate our quotation process, the fabricator should submit a drawing of the blank together with the dimensional measurements.