Calibration targets reduce unwanted reflections

MAY 19, 2009--Unwanted reflections from the surface of a calibration target cause problems in many optical calibration configurations. A method to reduce unwanted reflections is to use a calibration target with a white scattering surface. Due to light scattering caused by the surface roughness, no direct reflections occur. As an alternative to costly substrates such as ceramic substrates, a cost-effective method for the manufacture of the scattering surface has been developed. Cost reduction is primarily achieved by applying a white surface on standard glass substrates. The scattering surface show a uniform light distribution (quasi Lambertian scatter shape). The combination of a high-end patterning process for metal layers and the quality of the white surface produce an optical calibration target with good edge acuity and high pitch accuracy. Typical applications are 2-D calibration, reference marking of large objects, and photogrammetry.
IMT Masken und Teilungen
Greifensee, Switzerland
www.imtag.ch

For related information, visit the Lighting & Optics topic center.

-- Posted by Carrie Meadows, Vision Systems Design, www.vision-systems.com

------

PRESS RELEASE

Reflexion free optical calibration targets
Unwanted reflections from the surface of a calibration target cause problems in many optical calibra-tion configurations. The specular reflexion of the illumination light source causes a strong distortion in light intensity measurements. Vision systems have difficulty coping with this effect.

An efficient method to reduce the unwanted reflections is to use a calibration target with a white scattering surface. Due to the light scattering caused by the surface roughness, no direct reflections occur.

As an alternative to the hitherto used costly substrates used for this purpose (e.g. ceramic sub-strates), a novel, cost-effective method for the manufacture of the scattering surface has been de-veloped by IMT. The costs reduction is primarily achieved by applying the white surface on standard glass substrates.
The scattering surface show a uniform light distribution (quasi Lambertian scatter shape)

The combination of IMT's high-end patterning process for metal layers in combination with the quality of the white surface enable maintaining the quality and accuracy required for a high-end optical calibration target, e.g. good edge acuity and high pitch accuracy at a very competitive price.

Typical applications are 2D calibration, reference marking of large objects and photogrammetry.

Get All the Vision Systems Design News Delivered to Your Inbox

Subscribe to Vision Systems Design Magazine or email newsletter today at no cost and receive the latest news and information.

 Subscribe Now
RELATED COMPANIES

SPONSORED CONTENT

Webcasts

Choosing the right camera for your machine vision system

In this presentation, Andy Bodkin (Bodkin Design & Engineering) will explain camera and optics specifications, and why this understanding is key for choosing a camera for your machine vision ap...

How the newest machine vision standards will affect you

How will the latest developments in machine vision standards affect you? This webcast will answer that question by featuring updates on relevant standards by some of the industry’s most knowledgeab...
Date: July 15, 2015

How vision systems are changing automotive manufacturing

How do Ford and General Motors leverage machine vision for powertrain manufacturing? How does traditional vision application development serve today’s needs, and what machine vision capabilities co...
Date: June 24, 2015

PRESS RELEASES

Adimec demonstrates CMOSIS and ON Semi high-resolution camera series and other imaging advances at AIMEX 2015

June 3, 2015 Adimec will showcase its portfolio of machine vision, healthcare and global security products and...

Adimec demonstrates high-resolution, high-speed CoaXPress Cameras at Photonics West 2015

June 3, 2015 Adimec (www.adimec.com), a world leader in application-specific, leading-edge industrial camera s...

Adimec and partners awarded two projects developing next generation image sensor and camera technologies

June 3, 2015 Adimec, a world leader in application-specific industrial OEM camera solutions, is a key partner ...

Archives

Click here to view archived Vision Systems Design articles