The On-Trak Photonics OT-301 is a precision position sensing amplifier engineered to process current outputs from position-sensitive detectors (PSDs) and deliver real-time position feedback. It conditions signals from duolateral, tetralateral, single-axis, quadrant, and bi-cell detectors across a wide dynamic range, making it suitable for laser alignment, motion control, and photonics applications requiring accurate optical position measurement.
Technical Specifications
Signal Processing
• Transimpedance gain: 4 × 10³ to 4 × 10⁶ V/A across six selectable settings
• Input current range: 0.1 µA to 1.5 mA
• Four transimpedance amplifier channels
• Frequency response: DC to 15 kHz
• Linearity: ± 0.1%
• Channel-to-channel tracking: 1%
Outputs
• Position X, Y: ± 10 V
• Sum output: 0–6 V (10 V maximum)
• Zero offset adjustment: ± 1 V per axis
• Calibration range: ± 10% of reading
Power & Connectivity
• Power input: ± 12 V DC @ 300 mA (AC adapter)
• Input connector: 9-pin D-sub (DB9)
• Output connectors: BNC, dual row 10-pin header (OT-301DL/SL models)
• Detector bias: 0 V ± 5 V (selectable)
Physical
• Standard model: 1.5 × 5.5 × 6.00 inches (H × W × D)
• OT-301DL/SL: 3.5 × 5.0 inches; ± 12 V DC @ 500 mA
– Key Features
• Position output independent of beam intensity
• Electronic zero adjustment (offset null) per axis
• Integrated automatic detector biasing
• Calibration capability for absolute position measurement
• Plug-and-play operation with minimal external amplification
– Typical Applications
• Laser beam alignment and tracking
• Motion control feedback systems
• Photonics instrumentation
• Scientific research requiring optical position measurement
– Compatibility & Integration
The OT-301 accepts inputs from all PSD types. Standard models use 9-pin D-sub inputs and BNC outputs; OT-301DL/SL variants feature header connectors for direct PCB integration.
