Active alignment adhesive for high-resolution automotive cameras

With DELO DUALBOND OB6799, DELO provides an adhesive optimised to fulfil the high optical needs of modern driver assistance systems. With it, the adhesive manufacturer sets new process speed and alignment accuracy standards for automotive cameras.

ADAS, such as lane departure warning and emergency braking systems, are increasingly capable, steadily improving vehicle safety. LiDAR and RADAR sensors, as well as high-resolution cameras, are critical to these systems.

This adhesive is specially designed for bonding and active alignment of ADAS cameras. The epoxy adhesive has a linear curing shrinkage reproducibly below 1%. Also, the product displays extremely low swelling behaviour, even under changing temperature and humidity conditions, so that camera focus remains optimally adjusted and can always fulfil its safety functions.

Since high-resolution cameras are predominantly made of aluminium, the CTE was specially adapted to this material. Application-relevant ageing tests (e.g., +85C/85% rh, 2000h) confirm the adhesive's high bonding strength to aluminium substrates.

The adhesive is specifically optimised for active alignment processes. With this method, now established in the automotive industry for manufacturing high-precision optical sensor systems such as ADAS cameras, image sensor data is actively read to determine the optimal sensor alignment to optics.

Due to the adhesive's rapid light fixation, the aligned components are precisely fixed within a few seconds and, from that point, reliably maintain their position. This makes it ideal for manufacturing processes designed for high volumes with demanding efficiency and alignment accuracy needs. The final curing of the adhesive takes place through low heat at +80C.

The new product adds another active alignment adhesive to the company's product portfolio. The company also offers special adhesive and process technology solutions for LiDAR and RADAR systems.

More information on ADAS manufacturing trends will be offered at the ADAS Manufacturing Virtual Conference on November 16, 2023. Experts from Bosch, Innoviz, Aview, Hella, and DELO will deliver presentations on sensors, cameras, and LiDAR systems in the automotive sector, with information on the latest developments in the manufacturing of safety systems for autonomous driving.