HomeResourcesBlogOmron ZW-5000 Compact Confocal Sensor

Omron ZW-5000 Compact Confocal Sensor

January, 2018 | Lindsey Shepard

Solve More Inspection Applications

The ZW-5000 outperforms laser displacement sensors in inspection applications where its ultra-small spot size makes it possible to do high-precision gap, position and profile measurements. Sensors with larger beams can be an effective solution for profile inspection where rough surfaces produce unwanted measurement results. Their large spot size helps ignore the roughness by averaging heights within the sensing area.

Proven technique for profiling

Pioneered over 20 years ago in Omron’s Automated Optical Inspection (AOI) machines, the height of micro components and solder beds are measured based on the color of the returned light. The ZW-5000’s coaxial illumination provides precise measurements of the returned light wavelengths from the object through the same optical path.  This capability is housed in a compact, industrially hardened, sensor head and easy to integrate system.

White light vs. laser.

It comes down to safety and installation space.  Most sensors used in these applications are equipped with a laser light source that requires physical safeguarding, which may pose a problem within confined spaces in today’s production lines.  The ZW-5000 confocal sensor uses a white LED light source to eliminate the issues that arise when utilizing a laser.

Accurate for inclined and curved surfaces.

Laser triangulation methods are not suitable and provide erratic measurement results when applied to inclined and curved surfaces. The ZW-5000 can handle inclined surfaces with its ability measure surfaces at ±25⁰. The confocal light successfully measures features with a high aspect ratio, such as objects in narrow diameter vessels. The outgoing light returns along the same optical path as the light reflected back from the object’s surface.


Non-contact, Confocal, white LED displacement sensor

Strict quality control, production speed, and appearance inspection are constantly increasing. To meet these demands, stable measurements during movement for quality inspection without compromising manufacturing speed are required.

Harnessing the benefits of the white light confocal principle, the ZW-5000 meets these demands for most any material type including glass, metal, plastic, and so on, and shapes such as round, flat, uneven, etc.

ZW-5000 Product Benefits

  • Small spot diameter down to 9µm improving the ability to measure minute profiles
  • Constant spot diameter throughout total measuring range
  • Slim form factor of the optical probe – fits anywhere
  • Response time as fast as 20µs – Enables high-speed sampling during motion
  • High Resolution of  0.25µm allows hairline pattern measurements or irregular surfaces
  • Linearity down to ±0.45µm regardless of material type, as a result, no tuning is required
  • Superb angle compensation of ±25⁰ makes the measurement of round or inclined surfaces possible
  • Machine control integration made easy with available DLL files

Successful Applications

The ZW-5000 confocal sensor uses function blocks within Sysmac Studio software to implement many types of measurements.  For instance, the ability to combine data points from multiple sensors or extracting 2D profiles. A full inspection system configuration includes an NJ, NX  controller or NY IPC running Sysmac Studio.


ZW Brochure

ZW Datasheet

ZW Sysmac NJ/NX/NY Information

ZW User Manual: This manual has been broken out into the different areas of focus for quick access to information. Please download all for the full user manual.

Terms & Conditions

Basic Configuration

Installation & Connections

Basic Operation

Convenient Functions

Settings for Function

Offline Settings

Sensor Controller Operations

Troubleshooting & Appendices