| Tetra-lateral PSDs |
| Position-sensitive detectors (PSD) |
Tetra-lateral position-sensitive detectors are manufactured with a resistive layer for both one- and two-dimensional measurements. They feature a common anode and two cathodes for one-dimensional position sensing, and four cathodes for two-dimensional position sensing. These detectors are best suited for applications requiring measurements over a wide spatial range. They offer high sensitivity uniformity, low dark current, and good position linearity over 64% of the sensitive area. A reverse bias should be applied to these detectors to achieve optimal current linearity when dealing with large light signals. For further details, as well as for mounting one-dimensional PSDs, please refer to the “Photodiode Characteristics” section of the catalog. Please note that the maximum recommended incident light power on the detector is 10 mW/cm². Additionally, the typical sensitivity uniformity for a 1 mm² beam spot size is ±5% for the SC-25D and SC-50D, and ±2% for all other tetra-lateral detectors.
Features
- A resistive layer
- High rise speed
- High dynamic range
- Very high resolution
- Independence from spot size and area
Applications
- Machine layout and control
- Level measurements
- Angle measurements
- 3-dimensional vision
- Position measurements