Technical Data
Optical Flatness
| Optical Flatness Comparison Chart | ||||||
|---|---|---|---|---|---|---|
Fringe |
Waves |
Microns |
Angstroms |
Microinches |
Inches |
Parallelism Seconds |
1/10 |
1/20 |
.025 |
250 |
1 |
.000001 |
0.2 |
1/5 |
1/10 |
.050 |
500 |
2 |
.000002 |
0.4 |
2/5 |
1/5 |
.100 |
1,000 |
4 |
.000004 |
0.8 |
1/2 |
1/4 |
.125 |
1,250 |
5 |
.000005 |
1.0 |
1 |
1/2 |
.250 |
2,500 |
10 |
.000010 |
2.0 |
2 |
1 |
.500 |
5,000 |
20 |
.000020 |
4.0 |
3 |
1 1/2 |
.750 |
7,500 |
30 |
.000030 |
6.0 |
4 |
2 |
1.000 |
10,000 |
40 |
.000040 |
8.0 |
8 |
4 |
2.000 |
20,000 |
80 |
.000080 |
16.0 |
10 |
5 |
2.500 |
25,000 |
100 |
.000100 |
20.0 |
100 |
50 |
25.000 |
250,000 |
1,000 |
.001000 |
200.0 |
©2009 Sinclair Manufacturing Company