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High density IR absorbing filter
We have succeeded in increasing the density of the conventional IR absorbing filter - ISK171.
This high density allows the same performance to be obtained with thinner thickness.
With thinner thickness, it is lighter in weight, alleviating the weak point of glass---weight.
We succeeded in reducing the weight of finished products such as laser safety glasses approximately 30%.
Comparison data between conventional product (ISK171 t=4.2mm) and high density product (ISK180 t=3.0mm) is as follows.
ISK171, ISK180 transmittance comparison
ISK171, ISK180 OD value comparison
Comparison data
| Wavelength(nm) | Transmittance(%) | OD Value | ||
|---|---|---|---|---|
|
Conventional |
High density |
Conventional |
High density |
|
| 850～900 | 0.016123 | 0.002517 | 4 | 5 |
| 900～950 | 0.000581 | 0.000039 | 5 | 6 |
| 950～1000 | 0.000021 | 0.000001 | 7 | 8 |
| 1064 | 0.000000 | 0.000000 | 9 | 10 |
| 1000～1600 | 0.000002 | 0.000000 | 8 | 9 |
| 1600～2000 | 0.000040 | 0.000003 | 6 | 7 |
| Visible range luminous transmittance(%) | 62.170 | 67.549 | ||
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