Light from OSRAM is the invisible passenger.14 May 2020 12:23
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Eye tracking in particular is an application that shows the need for high-quality light. The light must be powerful enough to function in daylight but must not damage the driver’s eyes. “Infrared emitters with a wavelength of 940 nanometers are now firmly established for this purpose,” says Wittmann. “We offer an unbeatable portfolio of solutions: compact in design, powerful and with different beam angles for every need.” They include infrared LEDs and infrared surface-emitting lasers, known as VCSELs. The latter are increasingly being tested because they have two key advantages. Their integrated optics produce the desired light distribution directly, which means the light source is much more compact. And they also emit light in a narrower band, which minimizes the unwanted effect of red glow even though infrared light is essentially invisible.
VCSELs are also ideal for another aspect of driver monitoring, namely identifying drivers by their facial features. This aspect is relevant for safety in that it can be used, for example, to adjust the seat position or the airbag for each driver.
https://www.osram-group.com/en/innovation/dms