The OBP Series Optical Position Sensing Detector is designed to measure laser beam displacement and optical power at rates of up to 60 kHz (with 4mm head) with sub-micron spatial resolution. The detector head comes with an ambient light shield and can be fitted with up to three, stackable filters (ordered separately).
The Position Sensing Detector (PSD) head connects to the electronics pack via a 9-pin female D-sub connector. Analog versions include a second 9-pin male D-sub connector for interfacing the input and output signals, including power input and analog output signals to monitor power and displacement signals. After connecting the ±18 VDC power supply (included) at the input, the user simply plugs the output signals into a DVM or oscilloscope to monitor and record position and laser beam power. USB version includes a USB output connector and software package.
Applications
- Fast-steering mirror measurements
- Monitor vibration and deflection
- Closed-loop measurement applications
Software
The software provides an extensive range of graphical displays and analysis capabilities, where one can operate both the Position and Power measurements in parallel. While the Position sensing capability is activated the system provides a real-time display of position deviations, as well as data storage and temporal analysis.
Relative measurements to any pre-defined point on the detector is also available.
While the Position measurements are done, one can activate the Power measuring capability of the position-sensing detector. Additionally, one can activate the Plot or Chart functions, in order to observe strip-chart type plots of either Power versus Time, or XY Position versus Time, with auto scaling and saving capabilities. The Scope function enables presentation of real time oscilloscope type display of beam Position deviations (or Power fluctuations) versus Time.
Software screenshot
Specifications
|
Model |
OBP-A-4L
|
OBP-U-4L
|
OBP-U-4H
|
OBP-A-9L
|
OBP-A-9H
|
OBP-U-9L
|
OBP-U-9H
|
| Wavelength Range (nm) |
350-1100 |
| Sensor Size |
4 x 4 |
9 x 9 |
| Power Input Range(1) |
10 µW to 2.5 mW |
10 µW to 2.5 mW |
1µW to 250 µW |
10 µW to 2.5 mW |
1µW to 250 µW |
10 µW to 2.5 mW |
1µW to 250 µW |
| Power Density, Maximum Average (mW/mm2) (CW, 633 nm) |
1 |
| Response Time, 1/e |
<30 µS |
<60 µS |
| Resolution(2) (CW Lasers / Pulsed Lasers) |
Better than 1 mV / 5 mV |
| Position Accuracy(3) |
+/- 25 µm |
+/- 15 µm |
+/- 25 µm |
+/- 15 µm |
| Operating Temperature Range (°C) |
0 to 50 |
1) Measured with HeNe laser (633 nm).
2) Resolution Conversion Factor: 1 mV = 1 µm.
3) Over 8 mm diameter using HeNe beam of 0.8 mm.
