Method for detecting misalignment and/or contamination of optical system in data glasses and optical system

The invention relates to a method for detecting a misalignment and/or contamination of an optical system (10) in data glasses (12), comprising at least one laser projector (14) which is designed to output at least one light signal (16) which at least partially forms an image display of the data glasses (12). According to the invention, in at least one monitoring step (18), an at least partial retroreflection of the light signal (16) generated by a component (20, 26, 44) of the optical system (10) is detected and a deviation from a reference state is checked. 本发明从一种用于识别数据眼镜(12)中的光学系统(10)的失调和/或污染的方法出发，所述光学系统具有至少一个激光投影仪(14)，所述激光投影仪设置用于输出至少一个光信号(16)，所述光信号至少部分地构造所述数据眼镜(12)的图像显示。提出，在至少一个监控步骤(18)中，检测所述光信号(16)的、由所述光学系统(10)的部件(20，26，44)产生的、至少部分的逆向反射，并且检查与参考状态的偏差。