Colored Glass Filters
COLORED GLASS FILTERS
Explanation of Glass Characteristics (Transmittance Glossary)
| λT (nm) | Transition wavelength Midpoint between wavelength with 5% of transmittance and wavelength with 72% of transmittance |
|---|---|
| Δλ (nm) | Transition interval Distance between wavelength with 5% of transmittance and wavelength with 72% of transmittance |
| TH (%) | Transmittance in the high transmittance range Average transmittance in the range from wavelength with 72% of transmittance to wavelength of 800 nm. |
| λ5 (nm) | Wavelength with [5%] of transmittance |
| λ80 (nm) | Wavelength with [80%] of transmittance |
| Tav (%) | Average transmittance. Average value of transmittances in steps of 10 nm from 400 to 700 nm. |
| Tmax (%) | Maximum transmittance. Transmittance of wavelength at maximum transmittance. |
| λs1 (nm) | Less than 1% wavelength at short wave side. |
| λl5 (nm) | Less than 5% wavelength at long wave side |
| T254 (%) | Transmittance at 254 nm |
| T405 (%) | Transmittance at 405 nm |
| T435 (%) | Transmittance at 435 nm |
| T445 (%) | Transmittance at 445 nm |
| T550 (%) | Transmittance at 550 nm |
| T586 (%) | Transmittance at 586 nm |
| T750 (%) | Transmittance at 750 nm |
| T1000 (%) | Transmittance at 1000 nm |
| V (mired) | B-R conversion values V = 221 (Log 10 Tr - Log 10 Tb) mired * Tr: The average value (%) of transmittances of the filter at 610 nm, 635 nm, and 655 nm of wavelengths. ■ Relationship among color temperature before filtering, color temperature after filtering and B-R conversion values * The relationship may slightly deviate from the formula described above depending on the transmittances of the light source. |
