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AccuProfile 820 Laser Scanner
The AccuProfile 820 Laser Scanner creates 2D profiles and 3D point cloud data using laser triangulation measurement principles. Although slower than the AP620 model, the AP820 is more compact and performs very well on shiny or jagged targets. Edge scanning pose little problem due to the units auto gain and high dynamic range.

OVERVIEW
The AccuProfile™ 820 Laser Scanners are Acuity’s high-accuracy sensors for industrial parts scanning. Merging the technologies of machine vision and displacement measurement, these compact devices are ideal for in-line dimensions verification and reverse engineering of components. Common applications include dimensional verification of heights, widths, radius of curvature, gap width, surface separation, part length, hole diameters, etc.

DIFFERENCES WITH AP620 SENSOR MODELS
Both the AP820 and the AP620 profile scanner models use similar triangulation measurement principles. A laser line composed of many, closely-spaced laser spots, is emitted onto a surface. The image of this line is viewed at an angle by a two-dimensional CCD detector array. The AP820 laser scanners are more compact and lighter devices that are designed for use with engineered protective enclosures for tough industrial environments. Although capable of 100 scan lines per second, the AP820 boasts improved resolution and performance on dark surfaces and shiny targets.

Laser line across a metal part measuring elevations Most importantly, the AP820 laser scanners have dynamic, auto-gain which adjusts laser power and sample integration time ("shutter speed") which improves sensor performance on dynamically-changing surfaces. Changing surface reflectivities and orientations will not produce noisy measurements.

The AccuProfile 820 has all the necessary input channels to track up to two encoders as well as a single synchronization channel for applications using multiple sensors. The synchronization prevents detector interference of adjacent lasers.

TECHNICAL DATA
The AccuProfile™820 Laser Scanners uses triangulation measurement principles to measure displacements and surface heights by emitting a beam of visible laser light that creates a line on a target surface. Reflected light from the surface is viewed from an angle by a two-dimensional CCD detector array inside the AP820 sensor. The two-dimensional contour profile is calculated by the scanner’s microprocessor from the pixel data from the diffusely - reflected laser line. The height distance profile is transmitted through Ethernet communications to a PC computer. Real-time 3D profiling is created by synchronizing the position of the scanner with encoder inputs from conveyors, linear stages or robotic movements. A variety of models are specified, each to allow a different measurement range and field of view.

The scanner's sophisticated CCD detector affords the highest dynamic optical range, allowing these devices to measure almost any kind of opaque surface, shiny or matte, bright or dark. Additionally, the sensor performs well on sharp edges and transitions, where other sensor may produce noisy results. All of this is achieved through relatively low laser powers and permissible laser classes.

There are several different case designs for the AP820 series of laser scanners. See the photo above. Each has its own industrial design attributes and mechanical dimensions. Common accessories include a cooling module for hot environments and a protective lens shield.
EXTERNAL COOLING MODULE
This external cooling module allows either air or water cooling connection. The module mates directly to the side of the scanner housing and extends the temperature use up to 400°C (752°F)

WINDOW PROTECTION
Protective shield for scanner glass windows. This scanner option mounts to the front contours of the laser scanner to shield it from debris. The shield has windows aligned with the two scanner windows.