On trak one-dimensional PSD position sensor - silicon-based position sensor product description:

On trak one-dimensional PSD position sensor - silicon-based position sensor PSD is a photoelectric device that converts incident light spots into continuous position data, capable of simultaneously detecting position and light intensity. Very suitable for non-contact measurement of position, motion, distance, and vibration, this device is a silicon-based detector that can provide analog output proportional to the position of the light spot on the detector's active area. The continuous analog output of this silicon-based detector has many advantages over discrete components, including excellent resolution, fast response, superior positional linearity (applicable to various light intensities), and simpler operating circuits. On Trak's 1L series is a one-dimensional PSD that can detect light spots moving on its surface in one-dimensional space, operating based on the principle of transverse effect photodiodes. It is an analog device, therefore displaying excellent positional resolution. The resolution is determined by the signal-to-noise ratio of the system. The 1L series operates in bias mode. Typical applications include distance and height measurement, alignment, position and motion measurement, and vibration research.

The inherent resolution of PSD is very good, proven to be over one millionth. Therefore, the performance of PSD based measurement systems is limited by their mechanical, optical, and electrical components. To achieve optimal performance, it is necessary to consider:

• Modulate the light source. Modulation enables the avoidance of the influence of other light sources.
• Temperature stability.
• Mechanical stability system.
• High optical resolution.
• High resolution in sum and difference signal segmentation.

Position sensor (PSD) function:

• Convert the position of a light spot or radiation spot into a signal current
• Excellent positional resolution and linearity
• Wide spectral response
• Can work under various light or radiation intensities
• Short response time
• Simultaneously measure the intensity and position of light or radiation
• Not affected by the focus of light or radiation
• High dynamic range

On trak one-dimensional PSD position sensor - silicon-based position sensor application range:

• aim
• Distance and height measurement
• Position and motion measurement
• Vibration research

Technical parameters:

• Non linear position:+/- 0.1%
• Typical thermal drift: 20 ppm/° C
• Maximum operating temperature: 70 ° C
• Maximum storage temperature: 100 ° C

Typical operating circuit: