How it works

ATOS is an optical 3D scanner based on fringe projection, delivering accurate and traceable 3D coordinates.

Industrially proven over 20 years

First launched in 1995, the ATOS series of 3D scanners has been continually developed utilizing industrial proven technology. Today, optical 3D measuring technology and full-field surface measurement systems have become a standard tool within virtually all industries worldwide. ATOS is engineered with advanced hardware and software providing precise measurement results for industrial applications.

Measuring with ATOS Core is a basic three-step workflow:

Sensor positioning and measurement

The ATOS sensor is freely positioned, either manually or automatically, in front of the part. After each measurement, the sensor or part is moved to obtain areas not captured in the previous scan. All individual measurements are automatically transformed into a common coordinate system resulting in a complete 3D point cloud.


The computed polygon mesh describes free-form surfaces and primitives. It can be verified by comparing surfaces with a technical drawing or directly with a CAD dataset. A 3D analysis of surfaces as well as a 2D analysis of cross-sections or points can be implemented in the software. CAD-based generation of primitives such as lines, planes, circles or cylinders is also possible.

Reports and results

The results of the detailed inspection can be presented in customizable reports containing snapshots, images, tables, diagrams, texts and graphics. The results can be visualized and edited on the user interface as well as exported to a PDF document.

3D Scanning with Blue Light Technology

ATOS Core uses a stereo camera set-up working on the principle of triangulation. The sensor projects different fringe patterns onto the object‘s surface. These patterns are recorded by the two cameras, forming a phase shift based upon sinusoidal intensity distributions on the camera chips. ATOS Core uses multiple phase shifts in a heterodyne principle to achieve highest sub-pixel accuracy. Based on the optical transformation equations, independent 3D coordinates are automatically calculated for each camera pixel.

The projection technology developed by GOM operates with narrowband blue LED light. As a result, precise measurements can be taken independently of ambient light conditions. The robust Blue Light Technology has an extremely long service life, minimum heat development, and low maintenance costs.

Dynamic Referencing & Self Monitoring

ATOS‘ proven stereo camera technique delivers, for each measurement, an over determined system of equations.

The combination of the stereo camera technology with GOM's reference point system allows ATOS to guarantee process reliability by:

  • Detection of sensor/part movement
  • Verification of measurement accuracy and quality
  • Identification of environmental changes
  • Online tracking of 3D sensor position

Triple Scan

In addition to the stereo camera technique the ATOS Core utilizes GOM's Triple Scan technology. The stereo cameras combine with the projector to capture three views of an object in a single measurement process. This technology requires fewer scans and delivers higher quality data even when scanning shiny surfaces and complex geometries.

Optically Tracked Touch Probe

Many complex metrology applications require the combination of full-field and point based 3D measurement.

The GOM Touch Probe is available as an add-on to the ATOS Core:

  • Full-field and point-based 3D measurement
  • Measurement of difficult to access areas
  • Direct comparison to CAD
  • Measurement of primitives
  • Quick measurement of individual points
  • Online alignment

ATOS and Touch Probe measurements are carried out with one system and are evaluated with one software package.

No extra hardware or tracker is required, enabling quick measurement procedures and easy switching between surface and single point measurement and analysis.

Live Tracking & Part Positioning

In addition to the full-field scanning, ATOS Core systems can also be employed for live measuring of movements and deviations. This tracking is based on the stereo camera principle in connection with the GOM reference point system. Single points as well as complete components geometries can be traced in space. The alignment or positional deviation of a component from the nominal position can and also be measured and tracked live by the ATOS Core. This makes it easier to transfer the virtual alignment of components into reality.

Tracking can used for example for targeted positioning of components on CNC processing machines or palettes for material allowance control. Further applications include the assembly analysis of molds and tools as well as the positioning and assembly of sand cores and mold halves. Tracking can also be used for online positioning of components in the nominal position or in a subassembly, such as in the Meisterbock & Cubing, as well the setting and positioning of fixtures and reference frames.

GOM Acceptance Test / VDI 2634

All ATOS Systems must pass the GOM Acceptance Test before leaving production. The GOM Acceptance Test guarantees the quality of GOM measuring solutions. The Test is based on the VDI/VDE guideline 2634 Part 3 for optical 3D measuring systems based on area scanning. The GOM Acceptance Test goes beyond the definitions outlined in VDI/VDE guideline.

GOM issues a certificate for each test according VDI 2634 guideline. The GOM Acceptance Test can also be carried out at the customer’s site, so that the system’s accuracy can be reverified at any time.

User Calibration

As ATOS Core is delivered pre-calibrated and ready-to-scan, it requires low maintenance. The stereo camera set-up continuously monitors the calibration status. Should the ATOS Core become de-calibrated, the user is immediately informed. ATOS Core can then be quickly and easily recalibrated by the user or automatically with a robot. The sensor does not need to be sent to GOM or one of its partners to be recalibrated, the calibration can be freely carried out by users at any time.