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The HWB black glass is an infrared-transmitting / visible-absorbing cut-off filter: specific elements in the black glass absorb spectra before 760, 780, 800, 830, 850 or 930 nm and transmit beyond, with the neutral wavelength remaining unchanged for different incidence angles — an economical infrared longpass filter. Characteristic tables and curves below. Widely used in security monitoring, surveillance cameras, remote controls, IR detectors, IR-sensing toilets and soap dispensers, LiDAR, robots, drones, IR printers, IR touch screens, fingerprint recognition and face recognition.
| x | y | Y | x | y | Y | DA | DW | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HWB760 | 3 | 5 | 4 | 1.532 | 111 | 534 | 592 | 2.77 | ||||||
| HWB780 | 3 | 5 | 4 | 1.532 | 111 | 534 | 592 | 2.77 | ||||||
| HWB800 | 3 | 5 | 4 | 1.53 | 98 | 559 | 615 | 3.05 | ||||||
| HWB830 | 3 | 5 | 4 | 1.53 | 98 | 559 | 615 | 3.05 | ||||||
| HWB850 | 3 | 5 | 4 | 1.53 | 98 | 559 | 615 | 3.05 | ||||||
| HWB930 | 6 | 3 | 3 | 1.532 | 2.57 |
| HWB760 | 3 | 760±10 | 850 | ≥83.6 | ≥0.6 |
|---|---|---|---|---|---|
| HWB780 | 3 | 780±10 | 900 | ≥83.6 | ≥0.5 |
| HWB800 | 3 | 800±10 | 900 | ≥83.6 | ≥0.5 |
| HWB830 | 3 | 830±10 | 930 | ≥83.6 | ≥0.5 |
| HWB850 | 3 | 850±10 | 950 | ≥80.0 | ≥0.5 |
| HWB930 | 6 | 930±15 | 1050 | ≥80.0 | ≥0.2 |
| HWB760 | C-B | 3C | 3 | HWB830 | C-B | 3C | 3 |
|---|---|---|---|---|---|---|---|
| HWB780 | C-B | 3C | 3 | HWB850 | C-B | 3C | 3 |
| HWB800 | C-B | 3C | 3 | HWB930 | C | 3C | 3 |




