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在现场勘查中,常常会遇到遗留在疑难角度客体上的痕迹物证。如:罪犯跨越阳台时,在阳台间隔墙外竖直面上遗留的加减层指纹;罪犯揭瓦入室作案,在房屋梁檀上遗留下的加减层指纹等。对这类客体上的痕迹需要在现场进行拍照提取。而现有的摄影器材,无法将痕迹拍摄下来。笔者在实际工作中,研制出一套拍摄此类痕迹物证的简易器材:即“U”字型二次反射镜。
In the scene of the investigation, often encounter the traces of evidence left on the object of difficult angles. Such as: criminals across the balcony, balcony balcony in the vertical surface of the addition and subtraction layer of fingerprints; offenders offenders into the room committing the crime, left behind in the housing Tan Tan addition and subtraction layer fingerprints and so on. Traces of such objects need to be photographed on site. The existing photographic equipment, can not be photographed traces. In the actual work, the author developed a set of simple equipment for shooting such evidence: the “U” shaped secondary mirror.