光测技术往往是根据光电器件的特性来探测物体。直到现在,因为用目视调节比较方便,所以可利用的光限止在可见光区。如果仅限于在半导体方面考虑的话,CdS器件接近于人的视觉特性,所以用得最普遍,这大概就是理由之一吧!然而,最近光的利用方法有了很大的变化,光的强度除了具有物理意义以外,已经利用光来传送情报。特别是由于激光的发展,从过去的非相干光的应用技术正在发展以相干光为主要的应用技术。可以举光通信、激光显示器等为例,要考虑背景光和空气当中的吸收光和散乱光,红外光就比可见光具有更多的优点。新型光计测的方向是在红外区域扩展它的幅度。因此,在红外方面,高灵敏度的半 Photometric technology is often based on the characteristics of optoelectronic devices to detect objects. Until now, due to the more convenient visual adjustment, the available light is limited to the visible region. If only in the semiconductor considerations, CdS devices close to the visual characteristics of people, so the most common use, this is probably one of the reasons why! However, the recent use of light has been greatly changed, the intensity of light in addition to Beyond the physical meaning, light has been used to convey intelligence. Especially due to the development of laser, the application technology of incoherent light from the past is developing the application technology of coherent light. For example, optical communications and laser displays may be used. Taking into account the absorbed and scattered light in the background light and the air, the infrared light has more advantages than the visible light. The new light measurement direction is in the infrared region to expand its amplitude. Therefore, in terms of infrared, high sensitivity half