A UV cut-off glass filter is an optical material specifically designed to block ultraviolet (UV) lig...
Red cut-off glass filters are optical filters specifically designed to transmit red and longer wavelength light while effectively blocking shorter wavelength light (such as ultraviolet, blue, and green light). These filters, typically appearing red, are widely used in various fields including image processing, optical experiments, color enhancement, and laser technology, providing highly precise wavelength-selective filtering and optimizing spectral output.
1. Features
| Number | Thickness(mm) | A[2856k] | D65 | Chemical stability | ND | α×10-7 (℃) |
Tg(℃) | TS(℃) | S | |||||
| x | y | Y | x | y | Y | DA | DW | |||||||
| HB600 | 2 | 0.68 | 0.319 | 27 | 0.675 | 0.325 | 16.5 | 1 | 2 | 1.523 | 103 | 527 | 605 | 2.64 |
| HB610 | 2 | 0.695 | 0.305 | 18.4 | 0.69 | 0.31 | 10.7 | 1 | 2 | 1.523 | 103 | 527 | 605 | 2.64 |
| HB630 | 2 | 0.713 | 0.287 | 10.4 | 0.711 | 0.289 | 5.5 | 1 | 2 | 1.523 | 103 | 527 | 605 | 2.64 |
| HB640 | 2 | 0.724 | 0.276 | 5 | 0.723 | 0.277 | 2.4 | 1 | 2 | 1.523 | 103 | 527 | 605 | 2.64 |
| HB650 | 2 | 0.728 | 0.272 | 3.2 | 0.728 | 0.272 | 1.5 | 1 | 2 | 1.523 | 103 | 527 | 605 | 2.64 |
| HB670 | 2 | 0.731 | 0.269 | 1.1 | 0.73 | 0.27 | 0.5 | 1 | 2 | 1.523 | 103 | 527 | 605 | 2.64 |
| HB685 | 2 | 0.734 | 0.266 | 0.3 | 0.734 | 0.266 | 0.1 | 1 | 2 | 1.523 | 103 | 527 | 605 | 2.64 |
| HB700 | 2 | 0.735 | 0.265 | 0 | 0.735 | 0.265 | 0 | 1 | 2 | 1.523 | 111 | 534 | 592 | 2.64 |
| HB720 | 2 | 5 | 4 | 1.532 | 111 | 534 | 592 | 2.77 | ||||||
2. Technical requirements
| Number | Thickness(mm) | Atj(nm) | A0(nm) | TAO(%) | K |
| HB600 | 2 | 600±10 | 680 | ≥88.7 | ≥1.2 |
| HB610 | 2 | 610±10 | 680 | ≥88.7 | ≥1.2 |
| HB630 | 2 | 630±10 | 700 | ≥88.7 | ≥1.2 |
| HB640 | 2 | 640±10 | 720 | ≥88.7 | ≥1.2 |
| HB650 | 2 | 650±10 | 720 | ≥87.5 | ≥1.0 |
| HB670 | 2 | 670±10 | 750 | ≥87.5 | ≥1.0 |
| HB685 | 2 | 685±10 | 800 | ≥83.6 | ≥0.8 |
| HB700 | 2 | 700±10 | 800 | ≥79.8 | ≥0.8 |
| HB720 | 3 | 720±10 | 800 | ≥80 | ≥0.8 |
3. Bubble, fringe and stress levels
| Number | Bubble | Stripes | Stress |
| HB600 | C-B | 3C | 3 |
| HB610 | C-B | 3C | 3 |
| HB630 | C-B | 3C | 3 |
| HB640 | C-B | 3C | 3 |
| HB650 | C-B | 3C | 3 |
| HB670 | C-B | 3C | 3 |
| HB685 | C-B | 3C | 3 |
| HB700 | C-B | 3C | 3 |
| HB720 | C-B | 4 | 3 |
4. The spectra

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