Tree-D Model T241 High Resolution Laser Scanning Sensor

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The Tree-D T241 non-contact laser-based scanning sensor uses optical triangulation to scan a bright laser spot producing a high signal-to-ambient light level ratio. This allows operation in full sunlight. Accuracies of ±0.003"are achieved depending on working distance.

Conventional "light shear" scanning systems use laser line generator optics to spread the laser energy out over a line. The T241 scans a single, bright laser spot across the surface. Using a single moving mirror, a line scan imager tracks the laser spot. This produces laser intensity at any given surface point tens to hundreds of times brighter than if it were spread out over a long line.

The T241 contains its own temperature control system, maintaining the laser and sensor circuitry to a narrow temperature range. This ability to regulate internal temperature maintains high sensor accuracy over the entire working temperature range.

The scanning mirror is driven when commanded to scan. Each T241 sensor contains an advanced RISC architecture microcontroller that communicates to a data Concentrator Computer through a high-speed serial connection. The distance measurement samples are translated into X and Y coordinates representing the surface of the object being scanned. These coordinates are buffered on the Concentrator Computer and made available as a server process over Ethernet.