Long-Pass / Short-Pass Optical Filter
Longpass/shortpass filters are also called interference-filter coatings and are optical thin films for spectral or color separation. Longpass filters transmit longer wavelengths; shortpass filters transmit shorter ones. Similar to lowpass/highpass filters in electrical networks, they have broad applications, especially in LCD projection displays [1] and optical-communication WDM systems [2]. Their ability to pass one wavelength region while blocking another makes them widely used in military and civilian optical systems.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | H-K9, H-BAK7 and Other Optical Glasses |
| Center Wavelength | Made to Customer Requirements |
| Transmittance T(ave) [Wavelength Band Selectable to Customer Requirements] | T(ave)>92% (Wavelength Band Selectable to Customer Requirements) |
| Blocking Depth T(ave) [Wavelength Band Selectable to Customer Requirements] | T(ave)<0.1% (Wavelength Band Selectable to Customer Requirements) |
| Angle of Incidence | 0 Degrees or According to Customer Requirements |
| Surface Finish | II-V |
| Clear Aperture Dimension | >90% External Dimensions |
| Damage Threshold [CW] | 300MW/cm2CW |
| Damage Threshold | 1J/cm2 |
Datasheet
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