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Industrial Process Improvement Using 3D Sensor Technology
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3D Part Scan & Evaluation Service
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Proof of Concepts For 3D Inspection & Measurement
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3D Sensor Technology

Technology Overview

Please see below, as this will help provide some information on the most common 3D Sensor technologies we work with. Each has their own advantages and limitations. Dependent on the part you need to inspect, measure or locate, we can help you specify the right sensor for the job.

Confocal

Whitelight sensors capable of very high resolution

The confocal measurement principle is designed for high accuracy, non contact displacement distance and position measurement against any surface: solid, transparent, polished mirrored surfaces, low reflective matt surfaces and even liquids. If a surface is transparent, a one sided thickness measurement can be achieved with inbuilt correction for the material refractive index.

Quite often confocal sensors are selected when laser triangulation or other optical sensors are not accurate or stable enough on the surface being measured. In addition, confocal sensors have an extremely small spot diameter, typically a few microns and measure in the vertical plane, so do not suffer from shadowing of the reflected light. This also enables measurement into small bores and holes.

Almost all industries benefit from this measurement principle as it can be used in both R&D and in-process measurements. In particular, the semiconductor, micro lens, automotive part, medical, glass, and med device industries use this sensor technology in many ways. 

Typically available as single point sensors or line sensors.

Laser Triangulation

One of the most popular technologies.

Triangulation means distance measurement by angle calculation. In measurement technology, a sensor projects a laser line onto the Measurement object . The reflected light falls incident onto a receiving element at a certain angle depending on the distance. From the position of the line on the receiver element and the distance from the sender to the receiver element, the distance to the Measurement object is calculated in the sensor.

Structured Light

Does not require the sensor or part to move

A structured-light 3D scanner is a 3D scanning device for measuring the three-dimensional shape of an object using projected light patterns and a camera system.[1]

The light source from the scanner head projects a series of parallel patterns onto the scan target. When light projects onto the object’s surface, the patterns become distorted. The cameras capture these images and send them to the 3D scanning software for processing.

Time Of Flight (TOF)

Time-of-Flight (ToF) sensors are used for a range of applications, including robot navigation, vehicle monitoring, people counting, and object detection.

Time of flight is the measurement of time taken to travel a distance in order to determine distance, speed, or properties of the medium. Time for a signal to reflect off an object is often measured to determine the object’s location.

Lidar

TOF + Energy returned

LiDAR (light detection and ranging) uses ToF by emitting laser light pulses in multiple directions and measuring return time in order to detect objects. In addition to measuring return time, LiDAR may also measure the energy of the reflected light in order to create the detail in its distance map of the surrounding objects.

Interferometric Sensors

Available as static or moving point

Interferometers make use of the effects that occur when two or more beams of the same light source with slightly different path lengths are superimposed.

The resulting spectrum and its modulation frequency contain the distance or layer thickness data, depending on the measuring task the system is applied to.