GA/T 951-2011
ActiveRegulation of digital photography by ultra-violet observation photography system
紫外观察照相系统数码拍照规则
Catalogue
前言 → 1 范围 → 2 规范性引用文件 → 3 设备器材 → 4 技术方法 → 5 安全防护 Foreword → 1 Scope → 2 Normative References → 3 Equipment and Materials → 4 Technical Methods → 5 Safety Protection
Scope
This standard specifies the technical methods for digital photography using an ultra-violet observation photography system. This standard is applicable to the ultra-violet reflection photography methods for traces and physical evidence in criminal, civil, administrative cases and events such as traffic accidents, natural disasters, and accidents in China.
本标准规定了应用紫外观察照相系统进行数码照相的技术方法。本标准适用于我国刑事、民事、行政等案件及交通肇事、自然灾害、事故等事件中痕迹、物证的紫外反射照相方法。
Normative References
Keywords
Application Summary AI generated
Forensic technicians, evidence examiners, and crime scene investigators use this standard to photograph latent traces and physical evidence that are invisible to the naked eye using an ultra-violet observation system. It provides standardized procedures and technical guidelines to ensure high-quality UV reflection images, thereby enhancing the reliability of evidence and efficiency of case resolution.
刑事技术人员、物证鉴定专家和现场勘查人员使用该标准，在案件调查中利用紫外观察照相系统拍摄肉眼难以看见的痕迹和物证。该标准提供了标准化的拍照流程和技术要点，确保获取高质量的紫外反射影像，从而提升证据的可靠性和破案效率。
AI Summary AI generated
This standard specifies technical methods for digital photography using an ultra-violet observation photography system, applicable to UV reflection photography of traces and physical evidence in criminal, civil, administrative cases, traffic accidents, and natural disasters. It details equipment composition (UV image observer and digital camera), photography steps, technical key points, and safety protection requirements, emphasizing the critical influence of lighting angle on image contrast. It references multiple related standards to ensure operational standardization and evidence validity.
本标准规定了使用紫外观察照相系统进行数码拍照的技术方法，适用于刑事、民事、行政案件及交通肇事、自然灾害等事件中痕迹、物证的紫外反射照相。标准详细描述了设备组成（紫外图像观察仪和数码相机）、拍照步骤、技术要点及安全防护要求，强调配光角度对影像反差的关键影响，并引用了多项相关标准以确保操作规范性和证据有效性。
Key Sentences extracted from text
本标准规定了应用紫外观察照相系统进行数码照相的技术方法。
紫外观察照相系统是利用紫外反射技术获取痕迹图像，并通过紫外倍增管技术将不可见的紫外图像增强并转化为可见影像，然后通过数码相机进行拍照记录的设备系统。
拍照装置如图1所示．短波紫外图像观察仪通过紫外像增强器将不可见的短渡紫外反射图像转化为可见影像，并可通过目镜观察影像效果．数码相机拍照的是在目镜中观察到的可见影像．
当痕迹与承痕面在适当的配光条件下，垂直方向的紫外光反射分量存在差异时，就会以不同的反差表现出来。
紫外反射照相的拍照效果受配光角度的影响最大，只有找到了最合适的配光角度，才能得到反差最大的影像效果。
This standard specifies the technical methods for digital photography using an ultra-violet observation photography system.
The ultra-violet observation photography system is a device system that uses UV reflection technology to capture trace images, and through UV multiplier tube technology enhances and converts invisible UV images into visible images, then records them by digital camera.
The photography device is shown in Figure 1. The short-wave UV image observer converts the invisible short-wave UV reflection image into a visible image through a UV image intensifier, and the image effect can be observed through the eyepiece. The digital camera captures the visible image observed in the eyepiece.
When there is a difference in the vertical UV reflection component between the trace and the substrate under appropriate lighting conditions, it will be manifested with different contrast.
The photography effect of UV reflection photography is most affected by the lighting angle; only by finding the most suitable lighting angle can the maximum contrast image effect be obtained.