Optical measurements in 2D/3D

OPTICAL FILL LEVEL CONTROL OF BOTTLES

Modular, expandable optical measuring systems, adapted to your individual requirements are cheaper than you think!

Optical metrology tasks such as checking for form and dimensional accuracy are among the most important applications in machine vision. For such applications, image quality is just as important as the algorithm, as only the combination of subpixel-precise measurement tools with the appropriate lens and the right illumination enables precise, resilient and reproducible results.

Using various measuring methods and highly accurate calibration procedures, our experts verify a wide variety of objects for shape and dimensinal accuracy with extreme precision and deliver reliable results.

  • Measurement of turned, pressed or stamped parts such as profiles, injection-moulded or die-cast parts, etc.

  • Inspection of O-rings, seals, printed circuit boards, parts and components and much more

  • Optical fill level control

  • Dimensional inspection of valves, syringes, cannulas for the pharmaceutical industry

  • Inspection of ceramic, plastic, aluminium die-cast parts (height, diameter, curvature, breakouts, holes)

  • Inspection of bulk parts such as nuts, screws, bolts, etc.

  • Test bench for plant measurement

Advantages of an optical inspection system

Based on the physical principles of absorption and reflection, camera-based measuring systems capture the complete surfaces of an object and generate a digital image of the entire test object. Optical measuring technology with image processing is mostly used for full-surface, non-contact, dimensional and shape inspection tasks of a wide variety of objects and is suitable for complex and critical measuring tasks.

Non-destructive and wear-free measurement

Non-contact inspection, damage to the measured object is avoided

Full-surface measurement and form testing

Inspection of surfaces and 3-dimensional objects

Material-independent application

Matt of glossy, metal, plastic, ceramic or rubber

Application examples

  • fill level inspection of ampoules
  • inspection of meter accuracy
  • meauring dimensions on a razor blade
  • dimensional inspection of components
  • metrology application metal
  • control of plant growth
  • optical inspection of frozen food

2D inspection - measurement of flat surfaces using front or backlight illumination

checking dimensional accuracy of components with 2d machine vision

For inspection at standstill, the test object is placed on a glass plate or presented directly to the image sensor using any device. The dimensions of the test object can be calculated from the know distance to the test object and the size of the image details.

Moving objects can be inspected by presenting the object in motion to the image sensor using a backlight, thus enabling detection from different angles at high speed. A sharp image is achieved by taking pictures with very short exposure times.

With precise algorithms, individual parts of the object such as distances, angles, edges, size or shape can then be measured and compared with reference parts.

In order to be able to offer you the appropriate solution, we only need a few details:

  • What is the size of the area to be measured?

  • What are the dimensions of the smallest feature to be inspected?

  • How many parts are to be inspected at what ?

  • Should the inspection be carried out at standstill or in motion?

3D - Inspection of geometric surface features

True 3D measurement is made possible with stereo vision using at least two cameras from different viewing angles and/or an active illumination or laser triangulation. From the known distances and viewing angles of the cameras or with the help of applied marks, the system can generate a three-dimensional coordinate data set.

During the measurement process, the object is placed in front of the sensor, whcih records it step by step from all sides. Software then automatically transforms all individual measurements into a common coordinate system, resulting in a complete 3D pointcloud of the object's surface. The data obtained enables variance analysis (target/actual comparisons) of the object geometry or the checking of shape and position.

volume measurement with 3D vision

2D versus 3D surface metrology

Choosing the right measurement method for a specific applications is not always easy. 2D methods are best suited for fast and highly accurate surface inspections, while 3D measurements are used when surfaces are complex and insight into surface structure and processing is required. 2D systems cannot detect the depth of an object and are dependent on the distance between the camera and the test object. 3D systems, on the other hand, capture the three-dimensional object properties. Errirs caused by object movement are compensated, high repeatability and measurement consistency and precise, reliable results are quaranteed - even when parts are moving.

We will be happy to advise you on the right solution for your task! Our services go far beyond co-development and include service level agreements, training, know-how transfer and continuous maintenance during the project. The level of service, just like the hardware solution, is always customisable!

What can we do for you?

We would be happy to discuss your ideas and requirements in detail and work with you to develop a specialised solution, tailored to your individual needs.

Call us at +49 89 125094350 or complete the contact form.

Get in touch

phil-vision GmbH
Zeppelinstr. 5
82178 Puchheim
Germany
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+49 89 1250943 50