Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, IOSB, Gutleuthausstr 1, 76275 Ettlingen, Germany.
Sensors (Basel). 2012 Oct 19;12(10):14113-28. doi: 10.3390/s121014113.
Electro-optical imaging sensors are widely distributed and used for many different tasks. Due to technical improvements, their pixel size has been steadily decreasing, resulting in a reduced saturation capacity. As a consequence, this progress makes them susceptible to intense point light sources. Developments in laser technology have led to very compact and powerful laser sources of any wavelength in the visible and near infrared spectral region, offered as laser pointers. The manifold of wavelengths makes it difficult to encounter sensor saturation over the complete operating waveband by conventional measures like absorption or interference filters. We present a concept for electro-optical sensors to suppress overexposure in the visible spectral region. The key element of the concept is a spatial light modulator in combination with wavelength multiplexing. This approach allows spectral filtering within a localized area in the field of view of the sensor. The system offers the possibility of automatic reduction of overexposure by monochromatic laser radiation.
光电成像传感器分布广泛，应用于许多不同的任务。由于技术的改进，它们的像素尺寸一直在稳步减小，导致饱和容量降低。因此，这种进步使它们容易受到强点光源的影响。激光技术的发展导致了非常紧凑和强大的激光源，可在可见和近红外光谱区域中的任何波长下使用，作为激光笔提供。多种波长使得通过传统的吸收或干涉滤光片等措施在整个工作波段中遇到传感器饱和变得困难。我们提出了一种用于光电传感器的概念，以抑制可见光谱区域中的过曝光。该概念的关键元件是空间光调制器与波分复用相结合。这种方法允许在传感器的视场中的局部区域内进行光谱滤波。该系统提供了通过单色激光辐射自动减少过曝光的可能性。
