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PSD Position-Sensitive Sensor
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Measurement wavelength range: 320-1100nm
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9X9mm area position sensor
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1.5 µm resolution
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Added dual RS-485 communication ports for system integration and multiple PSD scenarios.
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Computer communication interface from Micro USB to Type C
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Added synchronous trigger function, compatible with low-frequency pulse light sources (below 10KHz).
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More convenient API functionality for secondary development.
Structure and Principle
The PSD position-sensitive sensor can provide the precise position of a laser beam in 9Y space, widely applicable for beam stabilization systems and laser position tracking. As shown in Figure 1, the PSD contains four PN junctions. When the laser illuminates the diode, the four corners output IA, IB, IC, and ID, with the common terminal being COMMON. Through four circuit comparisons, the position of the laser beam on the sensor is determined. Unlike the principle of a four-quadrant diode, the PSD uses an enhanced quadrilateral electrode diode, ensuring a good linear relationship across the entire range of the position sensor.
The product is designed to measure wavelengths from 320-1100 nm; please refer to the following figure (Figure 2) for spectral response rates.
Figure 1 *PSD Structural Diagram
Figure 2 *PSD Diode Spectral Response Rate
PSD Display Software Interface
Product Parameters
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Model |
PSD-9Y |
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Wavelength Range |
320-1100nm |
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Diode Area |
9x9mm |
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Maximum Spectral Response Rate |
0.61A/W@960nm |
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Maximum Laser Power |
5mW |
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Recommended Spot Diameter |
>0.2mm |
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Resolution |
1.5µm |
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Accuracy |
±25µm |
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Communication Interface |
Mini USB |
Size Specifications
Navi Exploration (Shanghai) Technology Co., Ltd.
NanoSeek (Shanghai) Technology Co., Ltd.
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Contact Information丨17321162239
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