"光电子扫描装置" can be translated into English as "optoelectronic scanning device" or "photoelectron scanning apparatus".
"Optoelectronic" combines "opto-" (relating to light) and "electronic," accurately reflecting the technology involving both light and electronics.
"Photoelectron" specifically refers to electrons emitted due to the interaction of light (photons), which is also relevant in the context of scanning devices that may rely on such phenomena.
"Scanning device" or "scanning apparatus" clearly conveys the function of the equipment.
Both translations are valid, and the choice between them may depend on the specific context or technical emphasis. In most general or technical contexts, "optoelectronic scanning device" would be a widely understood and appropriate term.