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Description
Optical Glass Filters/Color Filters
Optical filters selectively transmit light in a particular range of wavelengths, that is, colours, while blocking the remainder. They can usually pass long wavelengths only (longpass), short wavelengths only (shortpass), or a band of wavelengths, blocking both longer and shorter wavelengths (bandpass). The passband may be narrower or wider; the transition or cutoff between maximal and minimal transmission can be sharp or gradual. There are filters with more complex transmission characteristic, for example with two peaks rather than a single band; these are more usually older designs traditionally used for photography; filters with more regular characteristics are used for scientific and technical work.
Optical Glass Filters/Color Filters
Optical filters selectively transmit light in a particular range of wavelengths, that is, colours, while blocking the remainder. They can usually pass long wavelengths only (longpass), short wavelengths only (shortpass), or a band of wavelengths, blocking both longer and shorter wavelengths (bandpass). The passband may be narrower or wider; the transition or cutoff between maximal and minimal transmission can be sharp or gradual. There are filters with more complex transmission characteristic, for example with two peaks rather than a single band; these are more usually older designs traditionally used for photography; filters with more regular characteristics are used for scientific and technical work.
| Type | Thickness (mm) |
A[2856k] | D65 | Chemical Stability | ND | α×10-7 (ºC) |
Tg (ºC) |
Ts (ºC) |
S | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| x | y | Y | x | y | Y | DA | DW | |||||||
| ZWB1 | 1 | 0.734 | 0.266 | 0.1 | 0.726 | 0.262 | 0.0 | 4 | 4 | 1.557 | 94 | 529 | 588 | 2.87 |
| ZWB2 | 1 | 0.532 | 0.171 | 0.9 | 0.231 | 0.032 | 0.4 | 2 | 2 | 1.520 | 97 | 515 | 589 | 2.65 |
| ZWB3 | 2 | 0.711 | 0.256 | 0.3 | 0.538 | 0.176 | 0.1 | 2 | 3 | 1.526 | 85 | 527 | 616 | 2.63 |
| Type | Thickness (mm) |
254 (nm) |
280 (nm) |
313 (nm) |
334 (nm) |
365 (nm) |
405 (nm) |
700 (nm |
|---|---|---|---|---|---|---|---|---|
| ZWB1 | 1 | ≥50.0 | ≥81.0 | ≤1.0 | ≤30.0 | |||
| ZWB2 | 1 | ≥38.0 | ≥80.0 | ≤8.0 | ≤14.0 | |||
| ZWB3 | 2 | ≥50.0 | ≥86.0 | ≤28.8 | ≤64.6 |
| Type | Bubble | Stripe | Stress |
|---|---|---|---|
| ZWB1 | C | 4 | 4 |
| ZWB2 | C | 4 | 3 |
| ZWB3 | C | 4 | 4 |
