S-NPH3
S-NPH3 is a glass material with even higher dispersion than S-NPH2, with which appropriate correction of chromatic aberration is possible.
Its refractive index (nd) exceeds 1.95. We also recommend it as an effective glass material for thinner optical systems.
| |
S-NPH3 |
S-NPH2 |
|---|
| Eco Optical Glass |
○ |
○ |
|---|
| Refractive Index nd |
1.95906 |
1.92286 |
|---|
| Abbe Number νd |
17.5
17.47 |
18.9
18.90 |
|---|
CTE α
(10-7/°C) | -30～70°C |
58 |
67 |
|---|
| +100～300°C |
71 |
83 |
|---|
| Transformation Point Tg(°C) |
669 |
650 |
|---|
| Yield Point At(°C) |
703 |
676 |
|---|
| Coloring |
λ70 |
440 |
440 |
|---|
| λ5 |
400 |
390 |
|---|
| Chemical Resistance | RW(P) |
1 |
1 |
|---|
| RA(P) |
1 |
1 |
|---|
| W(S) |
- |
1 |
|---|
| SR |
- |
1.0 |
|---|
| PR |
- |
1.0 |
|---|
| Specific Gravity |
3.59 |
3.58 |
|---|
| Knoop Hardness Hk |
500[5] |
450[5] |
|---|
| Abrasion Aa |
217 |
224 |
|---|
| Detail Catalog DATA |
During the data acquisition |
PDF |
|---|
| Available shapes |
•pressing
•saw cut center-less
groundcylindrical blanks
•polished ball
•cut blanks |
•pressing
•saw cut center-less
groundcylindrical blanks
•polished ball
•cut blanks |
|---|
Please note that the physical properties may change, since they are data obtained during development.
Please consult us about available size and tolerance.
