Linear sensors play a crucial role in many high-precision applications, especially in industrial image processing, quality control and material testing. To exploit the full potential of these sensors, we offer professional cover glass removal. This process significantly improves the optical properties of the sensor and opens up new application possibilities in demanding environments.

Why cover glass removal for linear sensors?

Linear sensors are often fitted with a cover glass to protect the sensitive pixels. However, this cover glass can also cause undesirable effects such as reflections, interference and spectral distortions that impair the performance of the sensor. Especially in applications that require the highest sensitivity and accuracy, a sensor without a cover glass is the better choice.

Removing the cover glass has several advantages:

Increased spectral sensitivity

Especially in the visible and infrared range (VIS-SWIR), sensors benefit from optimized transmission and reduced signal loss.

Minimization of reflections and ghost images

By removing optical barriers, interfering light reflections are reduced, which improves image quality and measurement accuracy.

Optimal integration of special filters

Customized filters can be adapted directly to the sensor without cover glass, e. g. to specifically detect certain wavelength ranges. In addition to cover glass removal, Eureca also offers the fitting of filters as a service. Furthermore, a UV coating can also be applied to a de-windowed sensor in order to extend the spectral range.

More precise detection of the smallest structures

In the semiconductor industry or in surface inspection, error-free detection of the finest defects is crucial—a cover glass-free sensor reduces optical distortions and ensures an unaltered signal.

Areas of application for linear sensors without cover glass

Our precise cover glass removal offers advantages in many areas of industrial measurement technology:

Semiconductor and wafer inspection

Detection of microcracks, layer thickness analysis and quality assurance on wafers and chips.

Industrial quality control

High-resolution inspections of components, metal or plastic surfaces for defects or structural faults.

Sorting technology & material analysis

Used in the recycling or pharmaceutical industry for spectral differentiation of different materials and substances.

Research & development

Optimization of measurement processes in science and industry through improved optical signal recording.

Precise and residue-free removal of the cover glass

We use innovative processes to remove the cover glass with as little mechanical stress and as little residue as possible. Our controlled technology ensures the integrity of the sensor and maintains its full functionality—while at the same time optimizing its optical performance.

The following types are successfully processed:

• all sensors of the ILX series from Sony (e. g.ILX551B)
• all sensors of the TCD series from Toshiba (e. g. TCD1304DG)

Interested in a customized solution? Contact us for more information or advice on the optimal adaptation of your linear sensor!

Do you use CCD/CMOS area sensors or SWIR detectors instead of linear sensors? We also have suitable processes for cover glass removal in our program.