Lens Materials is the database associating and the custom RX-Universe Lens Code to a specifiac specific index & material type. IE: Material type C=Polycarbonate
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The next column is the Type, as you can tell there could be Multiple Plastic Type with different index of refraction, each one will have its own RX-U Code.
If you double click on the first one "code 0 P" you will see the screen below
Here below is a reference table of the Material code associated to the Index along with the Material type.
Code | Material | Material Desc. | Index | Remarks |
1 | P | Plastic | 1.52 | MID-IDX 152 |
2 | P | Plastic | 1.667 | HI INDEX 1.667 |
3 | P | Plastic | 1.56 | ODC HI IDX 1.56 |
4 | P | Plastic | 1.56 | ODC HI IDX 1.56 |
5 | P | Plastic | 1.515 | HI INDEX 1.515 |
6 | P | Plastic | 1.7 | HI INDEX 1.700 |
7 | P | Plastic | 1.664 | HI INDEX 1.664 |
8 | P | Plastic | 1.508 | INSTASHADES |
9 | G | Glass | 1.9 | HI GLASS 1.900 |
A | P | Plastic | 1.6 | HI INDEX 1.600 |
B | P | Plastic | 1.58 | HI INDEX 1.580 |
C | C | PolyCarbonate | 1.586 | POLYCARB 1.586 |
D | P | Plastic | 1.56 | HI INDEX 1.56 |
E | P | Plastic | 1.74 | HI INDEX 1.74 |
F | P | Plastic | 1.593 | HI INDEX 1.593 |
G | G | Glass | 1.523 | GLASS |
H | G | Glass | 1.6 | GLASS INDEX 1.6 |
I | G | Glass | 1.701 | GLASS INDEX 1.7 |
J | G | Glass | 1.8 | GLASS INDEX 1.8 |
K | P | Plastic | 1.66 | HI INDEX 1.66 |
L | P | Plastic | 1.556 | HI INDEX 1.556 |
M | P | Plastic | 1.704 | HI INDEX 1.710 |
N | P | Plastic | 1.565 | HI INDEX 1.565 |
O | P | Plastic | 1.55 | HI INDEX 1.550 |
P | P | Plastic | 1.498 | PLASTIC CR39 |
Q | G | Glass | 1.701 | GLASS 1.7 40ABB |
R | G | Glass | 1.701 | GLASS 1.7 42ABB |
S | P | Plastic | 1.537 | SPECTRALITE |
T | P | Plastic | 1.5 | TRANSITION |
U | P | Plastic | 1.537 | SPECT.TRANS 3 |
V | G | Glass | 1.563 | GLASS IDX 1.563 |
W | P | Plastic | 1.556 | ORMEX |
X | P | Plastic | 1.595 | HI INDEX 1.595 |
Y | T | Trivex | 1.53 | TRIVEX 1.53 |