Fluorescence cards are based on rare-earth ions embedding in special solid state matrix coated on a substrate and laminated with clear plastic sheeting (IR detector card – FID-C) or incorporated into Ceramic Disks (FID-CD).
FID-Cards and FID-CD disks can be applied to detect and locate IR radiation from Near IR-light sources such as Nd-YAG lasers, LED and Laser Diodes and to evaluate spatial distribution of laser or LED beam intensity directly.
Due to high efficiency these detectors can be used in common under light condition and not required previously charging from another sort of light (UV or IR source, for example). When FID cards or discs are used for lasers – common safety precautions must be observed. There are no radioactive and toxic components used in FID products fabrication, so they are safe even when damaged by extremely high density of IR irradiation (above 109 W/cm2). FID-CD discs are reusable and can be repaired after laser induced heat damage by their surface polishing.
| Characteristics | FID-C (cards) | FID-CD (ceramic disks) |
|---|---|---|
| Spectral range | 760-1600 nm | 760-1600 nm |
| Sensitivity (depending on wavelength, see graph.1-2) | 1-50 mW/mm2 | 1-50 mW/mm2 |
| Dynamic range | 102-103 | 102-103 |
| Peak emission wavelength (see graph.3-4) | 560 nm | 560 or 660 nm |
| Time response | 10-3s | 10-3s |
| Image resolution (typical) | 4 lines/mm | 4 lines/mm |
| Energy conversion (for IR emission at 960nm with power density 1 W/cm2) | 0.3% | 0.3% |
| Damage threshold continuous | 20 W/cm2 | 100 W/cm2 |
| Damage threshold intermittent | 100 W/cm2 | 500 W/cm2 |
| Dimensions FID-C can be made in 13x18 cm and 18x24 cm standards according special order. | total: 8.5 x 5.5 cm sensitive area: 2x2 cm, 5x5 cm, 5x8 cm | total: Ø2.9cm, Ø3.9cm sensitive area: Ø1.9cm, Ø2.9cm |
