Colored Glass Longpass Filters
Color Glass Bandpass Filters are manufactured by doping special elements during glass melting. This enables the glass to absorb specific spectral bands while transmitting others. Leveraging the inherent absorption and transmission properties of the base material, color glass filters maintain a stable central wavelength regardless of incident light angle — a distinct advantage over coated dielectric filters. Tuniu Optics supplies high-durability color glass bandpass filters, widely used in laser protection, industrial measurement, and environmental monitoring instruments.
We provide many kinds of filters to meet your different need. Beside the catalog filters, custom size & shape filters could be provided as well.
Parameters
| Material: Optical Color Glass | Thickness: 2 ± 0.2 mm |
| Flatness: λ/2@633 nm (per dia. 25 mm) | Central wavelength*: ± 10 nm |
| Parallelism: < 1′ | Transmission: Tavg > 85% |
| Surface Quality: 60/40 | Dimension Tolerance: + 0.0/ -0.2 mm |
| *Central wavelength(λC): The wavelength with transmission = 50% Tmax | |
Model
| CWL(nm) | Filtr color | Diameter(mm) |
| 280nm | Clear | 12.50/25.00/50.00, 50.00×50.00 |
| 320nm | Clear | |
| 375nm | Clear | |
| 395nm | Clear | |
| 420nm | Yellow | |
| 435nm | Yellow | |
| 455nm | Yellow | |
| 475nm | Yellow | |
| 495nm | Yellow | |
| 515nm | Yellow | |
| 530nm | Yellow | |
| 550nm | Orange | |
| 570nm | Orange | |
| 590nm | Red | |
| 610nm | Red | |
| 630nm | Red | |
| 645nm | Red | |
| 665nm | Red | |
| 695nm | Black | |
| 715nm | Black | |
| 780nm | Black | |
| 850nm | Black | |
| 1000nm | Black | |
| 630nm | Red | |
| 645nm | Red | |
| 665nm | Red | |
| 695nm | Black | |
| 715nm | Black | |
| 780nm | Black | |
| 850nm | Black | |
| 1000nm | Black |