Thermal imaging camera for glass

15 September 2015

Temperature is a key measurement parameter to control the quality of glass or glass products. The thermoIMAGER G7 is the latest addition to the Micro-Epsilon family of thermal imaging cameras which is specifically designed for measurements on glass objects.

Inline thermal imaging cameras or non-contact infrared temperature sensors can be installed to measure the temperature of glass products and surfaces during production, as well as glass substrates used in semiconductor processing and for the manufacture of solar cell panels, automotive glass, glass containers/tubes, light bulbs and LCD displays. However, traditionally, thermal imaging technology has been limited in the accuracy it can achieve.

However, with a spectral range of 7.9µm, the thermoIMAGER G7 is able to accurately measure the temperature of even very thin glass. Conventional thermal imagers with spectral wavelengths of 8-14µm do not accurately measure the temperature of the glass. At longer wavelengths, glass allows transmission of temperature from objects behind or near to the glass, which gives inaccurate measurements – normally lower than the true glass temperature. 

The G7 camera, at a wavelength of 7.9µm, is able to eliminate any transmission from other objects, resulting in accurate glass temperature measurement, says the company.

If the glass has a reflective coating, an additional reference pyrometer can be set up to provide an adjustment factor to the camera, which corrects for this reduction in transmission of infrared temperature from the glass – a feature of the thermoIMAGER software that is supplied as standard with the G7.

Powered and operated via a USB 2.0 interface, the Plug-and-play G7 provides temperature images and profiles of a target area. It enables the real time capture (at 80Hz full frame rate) and storage of images or video of an event for slow motion play back or snapshots at a later date.

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