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Autofocus sensor

Contrast evaluation for measurement of geometrical characteristics

Benefits

Distance measurement by focus variation with the hardware of the image processing sensor

By moving the lenses in the orientation of the optical axis, the sharpness (contrast) of the image is continuously evaluated for a section of the image. The contrast has its maximum where the object plane coincides with the focal plane. The sensor is then positioned accordingly to this calculated position. The accuracy of the procedure is primarily dependent on the depth of field of the lens.

Other benefits

Other benefits

  • By combining the non-contact measuring methods of image processing and autofocus sensor, many three-dimensional measuring tasks can be solved
Technical Data
Technical Data

Sensor principle

Optical-axial (focus variation)

Accuracy

Permissible probing error up to 0.25 µm

Functionality

With the hardware of the image processing sensor (a) camera, b) imaging optics, c) measuring object and d) transmitted light illumination), images are taken in different positions on the optical axis. Based on the contrast gradient, the position of the workpiece surface is determined.

Functionality
Compatible Sensor Principles
Werth Image Processing BV
Sensor
Werth Image Processing BV
Machines and Accessories
Filter

Further equipment for Autofocus sensor

EasyScope® manuell
Machine
EasyScope® manuell
ScopeCheck® S
Machine
ScopeCheck® S
ScopeCheck® FB
Machine
ScopeCheck® FB
ScopeCheck® MB
Machine
ScopeCheck® MB
ScopeCheck® V
Machine
ScopeCheck® V
StentCheck®
Machine
StentCheck®
NanoMatic
Machine
NanoMatic
VideoCheck® S
Machine
VideoCheck® S
VideoCheck® FB
Machine
VideoCheck® FB
VideoCheck® HA
Machine
VideoCheck® HA
VideoCheck® UA
Machine
VideoCheck® UA
VideoCheck® V HA
Machine
VideoCheck® V HA
Inspector® FQ
Machine
Inspector® FQ
Rotary axis
Accessories
Rotary axis
Rotary/tilt axis
Accessories
Rotary/tilt axis
Werth Zoom
Accessories
Werth Zoom
Telecentric lenses with fixed magnification
Accessories
Telecentric lenses with fixed magnification
MultiRing®
Accessories
MultiRing®
Angle optics
Accessories
Angle optics
Rotary/tilt optics IP40T / IP110T
Accessories
Rotary/tilt optics IP40T / IP110T
Software - The universal measurement software for coordinate measuring machines with optics, probe, computed tomography and multi-sensor systems
Software

The universal measurement software for coordinate measuring machines with optics, probe, computed tomography and multi-sensor systems

The operation of machines with different sensors, but also the evaluation of volume data and point clouds ...
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Service - Comprehensive service around the coordinate measuring machine
Service

Comprehensive service around the coordinate measuring machine

Services from initial commissioning, training and maintenance to retrofitting ...
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Contact
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