一、绪言圆柱面痕迹的拍照提取,一直是困扰刑侦技术人员的一大难题。这类客体,因表面弯曲,配光时易产生强烈的反光带,成像变形又极大,尤其遇到直径较小的载体,如书写笔、口服液瓶等,更加难以全面清晰地记录,一定程度上影响了现场勘查取证率。实际工作中常采用分段拍摄法固定,但往往影像变形,缺乏整体性,给技术检验带来许多困难。笔者受刚体纯滚动理论的启发,经过一年多反复研究试拍,创立了一种更简便实用的技术,即刚体纯滚动沿瞬时轴狭缝连续曝光法,并在此基础上,研制成功了一台简易的摄影装置(见照片1) I. INTRODUCTION Photographing of cylindrical marks has always been a major problem for criminal investigators. Such objects, due to surface bending, with light prone to produce a strong reflective tape, imaging deformation and great, especially encountered smaller diameter carriers, such as writing pens, oral liquid bottles, etc., more difficult to fully and clearly record, must To a certain extent, the rate of scene investigation and evidence collection was affected. Often used in practice fixed by sub-shooting method, but often the image deformation, the lack of integrity, to the technical inspection to bring many difficulties. Inspired by the rigid rolling theory of rigid body, after more than one year of trial research, I created a more simple and practical technique, that is, the rigid body pure rolling along the instantaneous axis slit continuous exposure method, and on this basis, the successful development A simple photography device (see photo 1)