【重要合规前置声明】本产品为国家管制类刑事技术勘查、痕迹物证提取专用特种装备，仅面向具备法定刑事侦查、物证鉴定资质的公安、检察、司法行政、司法鉴定等国家机关及授权执法单位定向研发与供应，不向任何个人、无资质企业及非授权单位提供。本产品的采购、配备、使用与管理，必须严格遵守《中华人民共和国刑事诉讼法》《中华人民共和国人民警察法》《公安机关刑事案件现场勘验检查规则》《法庭科学指纹检验规范》《警用装备管理条例》等国家法律法规与行业技术标准，必须由经过专业刑事技术培训、取得相应操作资质的痕迹检验人员规范操作，严禁无资质单位和个人违规购置、使用、转让本装备，严禁因违规操作导致的物证污染损毁、痕迹灭失、证据失效、司法程序违法。
产品概述
DEP-100 紫外图像观察照相系统，是一款基于短波紫外反射成像技术打造的专业级指纹无损提取装备，专为犯罪现场痕迹勘查、反恐应急处突、物证检验鉴定场景深度定制，是刑事技术部门开展光滑客体潜在指纹快速、无损提取的核心技术装备。系统通过军品级第三代紫外图像增强管，将不可见的短波紫外指纹图像实时转换为清晰可见光图像，可直接观察并同步拍照记录，彻底突破了传统指纹提取手段需要粉末刷显、化学熏染、暗室操作的局限。全程非接触、无化学处理，可在不破坏物证原始状态的前提下，快速发现并提取玻璃、金属、陶瓷、油漆面等光滑非渗透性客体上的潜在指纹，既保障了涉案物证的完整性与后续多维度检验的可行性，又大幅简化了现场勘查流程，提升了疑难痕迹的发现率与提取成功率，是现代化刑事技术勘查体系中不可或缺的无损取证装备。
技术原理
系统核心基于短波紫外反射成像原理与紫外图像增强技术构建，采用非接触式无损检验方式，全程不改变物证原始状态。设备通过 254nm 短波紫外光源均匀照射待检客体表面，由于潜在指纹的嵴线物质与客体基底对短波紫外光的反射率存在显著差异，会形成具有对比度的紫外反射图像；该图像经由 78mm 专用高透过率紫外镜头汇聚，通过 254nm 专用滤光片滤除杂散光干扰后，进入第三代紫外图像增强管，通过光电转换与信号倍增，将人眼不可见的紫外图像实时转换为高对比度的可见光图像。操作人员可通过目镜直接观察，也可连接数码相机完成标准化拍照固定。整个检验过程无需粉末、无需化学染色、无需 502 胶熏显预处理、无需暗室环境，从技术层面杜绝了传统显现方法对物证的污染与破坏，完全符合刑事诉讼中物证原始性、完整性的法定要求，提取的影像资料具备完整的司法证据效力。
核心功能与合规实战价值
无损非接触提取，保障证据原始合规性
系统采用纯光学反射式成像技术，全程无需使用指纹粉末、化学染色试剂，无需 502 胶熏显等预处理步骤，也无需在暗室环境下操作，即可直接发现并提取潜在指纹。非接触式的检验方式不会对物证造成任何物理、化学污染与破坏，完整保留了物证的原始状态，既避免了因物证损毁导致的证据失效风险，也为后续的 DNA 检验、微量物证分析等多维度鉴定保留了完整检材，完全符合司法鉴定对物证保管、检验的合规性要求。
军品级高灵敏成像，呈现细微痕迹特征
系统搭载荷兰进口军品级第三代紫外图像增强管，具备高灵敏度、高分辨率、高信噪比的成像特性，可精准捕捉微弱的紫外反射信号，清晰呈现指纹纹线、汗孔等细微特征；配合特制 78mm 高透过率专用紫外镜头与精密 254nm 紫外滤光片，可有效汇聚紫外光、滤除环境杂散光干扰，输出对比度高、边缘清晰的纯净指纹图像，哪怕是陈旧、微弱的潜在指纹也可有效识别，大幅提升了疑难客体上指纹的发现率与提取质量。
便携一体化设计，适配现场快速勘查需求
系统采用一体化便携设计，配套高强度防水防震除湿包装箱，整套设备可单兵携行、快速部署，完美适配室内外各类犯罪现场的机动勘查需求。配套的美国 SPECTRONICS 公司 254nm 便携式短波紫外灯采用独立电池包供电，无需外接市电即可连续工作 2 小时以上，可深入野外、偏远、无供电条件的现场开展勘查工作，满足刑事侦查、反恐应急处突的快速响应要求。
操作直观简便，提升勘查效率与成功率
系统彻底改善了传统短波紫外反射照相 “指纹不可见、光路调整繁琐、需要反复盲拍” 的技术痛点，操作人员可通过目镜实时直观地搜索、观察指纹图像，快速定位痕迹位置并调整拍摄参数，配合专用相机接圈可直接完成标准化拍照固定，大幅降低了操作门槛，缩短了现场勘查时间，有效提升了现场指纹的发现率与提取成功率，减轻了技术人员的工作负担。
合规应用场景
本设备仅可由具备法定刑事技术勘查、痕迹检验资质的单位与人员，在授权范围内规范使用，核心合规应用场景包括四大类：
一是刑事案件现场指纹无损勘查，在命案、入室盗窃、抢劫、性侵等各类刑事案件的现场勘查中，针对玻璃门窗、金属器具、陶瓷器皿、油漆家具、塑料包装物等光滑非渗透性客体上的潜在指纹，进行快速无损搜索与提取。尤其适用于珍贵物证、疑难微量物证的检验，在不破坏检材的前提下完成指纹取证，为后续的多维度鉴定保留完整检材，为案件侦查提供关键线索，完全符合《公安机关刑事案件现场勘验检查规则》对现场物证提取的规范性要求。
二是涉恐涉爆应急现场痕迹处置，在涉恐袭击、爆炸案件、可疑爆炸物处置等应急场景中，对可疑爆炸装置包装物、自制爆炸物残片、作案工具、遗留物品等客体进行快速指纹筛查。全程无需使用化学试剂与粉末，避免了易燃易爆环境下的安全风险，可在安全距离外完成非接触式痕迹提取，快速锁定嫌疑人身份线索，为反恐应急处置提供技术支撑。
三是重大活动安保与要害部位安检排查，在重大国事活动、国际赛事、重要会议的安保工作，以及要害单位、边境口岸的安全检查中，对可疑物品、证件、包裹、车辆部件进行快速指纹无损筛查，快速排查可疑人员与涉案物品，提升安保防控的响应速度与精准度，筑牢公共安全防线。
四是实验室物证复检与刑事技术教学培训，在司法鉴定实验室中，可用于对疑难痕迹物证的复核检验，作为传统显现方法的补充验证手段；同时可用于刑事技术专业教学培训，直观演示紫外指纹显现原理与操作流程，提升教学的直观性与实操性，助力刑事技术人才培养。
核心技术参数
系统成像核心搭载荷兰军品级第三代紫外图像增强器，配备军品级十倍观察目镜与眼罩，可实现紫外图像到可见光图像的实时高清转换。光学配置方面，配备特制 78mm 高透过率专用紫外镜头，支持微距照相功能，可实现 1:2 与 1:1 放大倍率；标配 254 纳米专用紫外滤光片，有效滤除杂散光干扰，保障成像对比度。光源系统采用美国 SPECTRONICS 公司出品的 254 纳米 6W 便携式短波紫外灯，配套专用电池包与充电器，无外接电源条件下可连续工作 2 小时以上。标准配套配件包含紫外防护眼镜、紫外照相系统专用手柄、数码相机与目镜连接转换接圈、专业照相三脚架、防水防震除湿型包装箱，可满足现场勘查、观察记录、拍照固定的全流程需求；可选配件包括尼康 FM 系列单反相机、1000 万及以上像素数码相机、固定紫外灯用万向臂、观察与单反相机照相切换板、专用照相翻拍架，可根据不同使用场景灵活选配。
合规实战应用案例
- 某市发生一起高端别墅区特大入室盗窃案，犯罪嫌疑人通过攀爬落地窗进入室内，盗走价值数百万元的珠宝首饰与现金。现场勘查中，技术人员发现阳台玻璃门、金属首饰盒、水晶摆件等光滑客体上可能留有潜在指纹，但上述物品均为事主贵重物品，且可能附着微量生物物证，不适合使用传统粉末刷显与化学熏显方法，避免造成物证污染与损毁。技术人员使用 DEP-100 紫外图像观察照相系统，对上述客体进行逐一无损扫描，在无需任何预处理的情况下，快速发现并提取到 8 枚具备鉴定条件的清晰潜在指纹，全程未对客体造成任何损伤与污染，同时完整保留了客体上的微量生物检材。通过指纹数据库比对，警方快速锁定了有多次入室盗窃前科的犯罪嫌疑人，结合 DNA 检验结果，案件在 48 小时内成功告破，被盗财物全部追回。本案中，设备的无损提取特性既保障了物证的完整性与多维度检验价值，又大幅提升了现场勘查效率，提取的指纹影像因取证过程合规、无二次污染，被法庭全部采纳为定案核心证据。
- 某市公安局反恐支队接到群众举报，城郊一处废弃厂房内有人非法制作爆炸装置。处置警力抵达现场后，发现厂房内遗留有自制爆炸物半成品、包装物与大量制爆工具，现场残留有易燃易爆化学品，严禁使用明火、化学试剂与粉末类显现手段，传统指纹提取方式完全无法开展。技术人员使用 DEP-100 紫外图像观察照相系统，采用非接触方式对制爆工具、包装物表面进行紫外扫描，在不接触、不扰动现场物品的前提下，快速提取到 5 枚清晰的潜在指纹。通过指纹比对，警方迅速锁定了核心犯罪嫌疑人，并顺藤摸瓜打掉了一个非法制爆涉恐团伙，及时消除了重大公共安全隐患。本次处置中，本设备的非接触、无试剂无损提取特性，完美适配易燃易爆高危现场的勘查需求，既保障了处置人员的人身安全，又快速获取了关键定案证据，为案件的快速侦破提供了决定性技术支撑。
Application Introduction of DEP-100 Ultraviolet Image Observation and Photography System - Non-Destructive Fingerprint Investigation and Anti-Terrorism Emergency Application
【Important Compliance Pre-Declaration】This product is a state-controlled special equipment for criminal technology investigation and trace evidence extraction. It is only developed and supplied to state organs and authorized law enforcement units with statutory criminal investigation and material evidence authentication qualifications, including public security organs, procuratorates, judicial administrative organs, and judicial authentication institutions, and will not be provided to any individual, unqualified enterprise or non-authorized unit. The procurement, deployment, use and management of this product must strictly abide by national laws, regulations and industry technical standards such as the Criminal Procedure Law of the People's Republic of China, People's Police Law of the People's Republic of China, Rules for On-Site Investigation and Inspection of Criminal Cases by Public Security Organs, Forensic Science - Specification for Fingerprint Examination, and Police Equipment Management Regulations. It must be operated in a standardized manner by trace inspection personnel who have received professional criminal technology training and obtained corresponding operation qualifications. It is strictly prohibited for unqualified units and individuals to illegally purchase, use or transfer this equipment, and it is strictly prohibited to cause evidence pollution and damage, trace loss, evidence invalidation, and violation of judicial procedures due to illegal operation.
Product Overview
The DEP-100 Ultraviolet Image Observation and Photography System is a professional-grade non-destructive fingerprint extraction equipment built on the basis of short-wave ultraviolet reflection imaging technology. It is deeply customized for crime scene trace investigation, anti-terrorism emergency response, and material evidence inspection and identification scenarios. It is the core technical equipment for criminal technology departments to carry out rapid and non-destructive extraction of latent fingerprints on smooth objects. Through the military-grade third-generation ultraviolet image intensifier tube, the system converts invisible short-wave ultraviolet fingerprint images into clear visible light images in real time, which can be directly observed and photographed simultaneously, completely breaking through the limitations of traditional fingerprint extraction methods that require powder brushing, chemical fumigation, and darkroom operation. The whole process is non-contact and chemical-free, which can quickly discover and extract latent fingerprints on smooth non-permeable objects such as glass, metal, ceramics, and painted surfaces without damaging the original state of the material evidence. It not only ensures the integrity of the involved material evidence and the feasibility of subsequent multi-dimensional inspection, but also greatly simplifies the on-site investigation process, improves the discovery rate and extraction success rate of difficult traces, and is an indispensable non-destructive evidence collection equipment in the modern criminal technology investigation system.
Technical Principle
The core of the system is built based on the short-wave ultraviolet reflection imaging principle and ultraviolet image enhancement technology, adopting a non-contact non-destructive inspection method, which does not change the original state of the material evidence throughout the process. The equipment irradiates the surface of the object to be inspected uniformly through a 254nm short-wave ultraviolet light source produced by SPECTRONICS of the United States. Due to the significant difference in the reflectivity of short-wave ultraviolet light between the ridge material of latent fingerprints and the object substrate, a ultraviolet reflection image with contrast will be formed. The image is converged by a 78mm special high-transmittance ultraviolet lens, filtered by a 254nm special filter to remove stray light interference, and then enters the third-generation ultraviolet image intensifier tube. Through photoelectric conversion and signal multiplication, the ultraviolet image invisible to the human eye is converted into a high-contrast visible light image in real time. Operators can observe directly through the eyepiece, or connect a digital camera to complete standardized photographing and fixation. The whole inspection process does not require powder, chemical staining, 502 glue fumigation pretreatment, or darkroom environment. It technically eliminates the pollution and damage to material evidence caused by traditional development methods, fully complies with the statutory requirements for the originality and integrity of material evidence in criminal proceedings, and the extracted image data has complete judicial evidence effect.
Core Functions and Compliance Practical Value
Non-destructive non-contact extraction, ensuring the original compliance of evidence
The system adopts pure optical reflective imaging technology. It can directly discover and extract latent fingerprints without using fingerprint powder, chemical staining reagents, 502 glue fumigation and other pretreatment steps, and without operating in a darkroom environment. The non-contact inspection method will not cause any physical or chemical pollution and damage to the material evidence, and completely retains the original state of the material evidence. It not only avoids the risk of evidence invalidation caused by material evidence damage, but also retains complete samples for subsequent multi-dimensional identification such as DNA testing and trace evidence analysis, fully complying with the compliance requirements of judicial authentication for material evidence storage and inspection.
Military-grade high-sensitivity imaging, presenting subtle trace features
The system is equipped with a Dutch imported military-grade third-generation ultraviolet image intensifier tube, which has the imaging characteristics of high sensitivity, high resolution and high signal-to-noise ratio. It can accurately capture weak ultraviolet reflection signals and clearly present subtle features such as fingerprint ridges and sweat pores. Matched with a special 78mm high-transmittance ultraviolet lens and a precision 254nm ultraviolet filter, it can effectively converge ultraviolet light and filter out environmental stray light interference, output pure fingerprint images with high contrast and clear edges. Even old and weak latent fingerprints can be effectively identified, which greatly improves the discovery rate and extraction quality of fingerprints on difficult objects.
Integrated portable design, adapting to the needs of on-site rapid investigation
The system adopts an integrated portable design, matched with a high-strength waterproof, shockproof and dehumidification packing box. The whole set of equipment can be carried by a single soldier and deployed quickly, which perfectly adapts to the mobile investigation needs of various indoor and outdoor crime scenes. The matched 254nm portable short-wave ultraviolet lamp produced by SPECTRONICS of the United States is powered by an independent battery pack, which can work continuously for more than 2 hours without external mains power. It can go deep into field, remote and non-power supply scenes to carry out investigation work, meeting the rapid response requirements of criminal investigation and anti-terrorism emergency response.
Intuitive and simple operation, improving investigation efficiency and success rate
The system completely improves the technical pain points of traditional short-wave ultraviolet reflection photography, such as "invisible fingerprints, cumbersome optical path adjustment, and repeated blind shooting". Operators can search and observe fingerprint images intuitively in real time through the eyepiece, quickly locate the trace position and adjust shooting parameters. Matched with a special camera adapter ring, standardized photographing and fixation can be completed directly, which greatly reduces the operation threshold, shortens the on-site investigation time, effectively improves the discovery rate and extraction success rate of on-site fingerprints, and reduces the work burden of technical personnel.
Compliant Application Scenarios
This equipment can only be used in a standardized manner within the authorized scope by units and personnel with statutory criminal technology investigation and trace inspection qualifications. The core compliant application scenarios include four categories:
First, non-destructive investigation of fingerprints at criminal case scenes. In the on-site investigation of various criminal cases such as homicide, burglary, robbery and sexual assault, rapid non-destructive search and extraction are carried out for latent fingerprints on smooth non-permeable objects such as glass doors and windows, metal utensils, ceramic vessels, painted furniture and plastic packaging. It is especially suitable for the inspection of precious material evidence and difficult trace material evidence. Fingerprint evidence collection is completed without damaging the samples, retaining complete samples for subsequent multi-dimensional identification, providing key clues for case investigation, and fully complying with the normative requirements of the
Rules for On-Site Investigation and Inspection of Criminal Cases by Public Security Organs for on-site material evidence extraction.
Second, trace disposal at anti-terrorism and explosion-related emergency scenes. In emergency scenarios such as terrorist attacks, explosion cases, and suspicious explosive disposal, rapid fingerprint screening is carried out on objects such as suspicious explosive device packaging, homemade explosive debris, crime tools, and leftover items. No chemical reagents and powders are used throughout the process, avoiding safety risks in flammable and explosive environments. Non-contact trace extraction can be completed at a safe distance to quickly lock the suspect's identity clues and provide technical support for anti-terrorism emergency response.
Third, security inspection for major events and key parts. In the security work of major state events, international sports events and important meetings, as well as the safety inspection of key units and border ports, rapid non-destructive fingerprint screening is carried out on suspicious items, certificates, packages and vehicle parts to quickly screen suspicious personnel and involved items, improve the response speed and accuracy of security prevention and control, and build a public security defense line.
Fourth, laboratory material evidence re-inspection and criminal technology teaching and training. In judicial authentication laboratories, it can be used for re-inspection of difficult trace material evidence as a supplementary verification method for traditional development methods. At the same time, it can be used for criminal technology professional teaching and training, intuitively demonstrating the principle and operation process of ultraviolet fingerprint development, improving the intuitiveness and practicality of teaching, and helping the cultivation of criminal technology talents.
Core Technical Parameters
The imaging core of the system is equipped with a Dutch military-grade third-generation ultraviolet image intensifier, matched with a military-grade 10x observation eyepiece and eye mask, which can realize real-time high-definition conversion from ultraviolet images to visible light images. In terms of optical configuration, it is equipped with a special 78mm high-transmittance ultraviolet lens, which supports macro photography function and can achieve 1:2 and 1:1 magnification. It is standard equipped with a 254nm special ultraviolet filter, which effectively filters out stray light interference and ensures imaging contrast. The light source system adopts a 254nm 6W portable short-wave ultraviolet lamp produced by SPECTRONICS of the United States, matched with a special battery pack and charger, and can work continuously for more than 2 hours without external power supply. The standard supporting accessories include ultraviolet protective glasses, special handle for ultraviolet photography system, adapter ring for digital camera and eyepiece connection, professional photography tripod, waterproof, shockproof and dehumidification packing box, which can meet the full-process needs of on-site investigation, observation and recording, and photographing and fixation. Optional accessories include Nikon FM series SLR cameras, digital cameras with 10 million pixels and above, universal arm for fixing ultraviolet lamps, switching plate for observation and SLR camera photography, and special photography copy stand, which can be flexibly selected according to different usage scenarios.
Practical Application Cases
- A huge burglary case occurred in a high-end villa area of a city. The suspect entered the room by climbing the French window and stole jewelry and cash worth millions of yuan. During the on-site investigation, the technical personnel found that there might be latent fingerprints on smooth objects such as the balcony glass door, metal jewelry box and crystal ornaments. However, these items are all valuables of the victim and may be attached with trace biological material evidence, so traditional powder brushing and chemical fumigation methods are not suitable to avoid material evidence pollution and damage. The technical personnel used the DEP-100 Ultraviolet Image Observation and Photography System to conduct non-destructive scanning of the above objects one by one. Without any pretreatment, they quickly discovered and extracted 8 clear latent fingerprints with identification conditions. No damage or pollution was caused to the objects throughout the process, and the trace biological samples on the objects were completely retained. Through the fingerprint database comparison, the police quickly locked the suspect with multiple previous burglary convictions. Combined with the DNA test results, the case was successfully solved within 48 hours, and all the stolen property was recovered. In this case, the non-destructive extraction feature of the equipment not only ensured the integrity and multi-dimensional inspection value of the material evidence, but also greatly improved the efficiency of on-site investigation. The extracted fingerprint images were fully adopted by the court as the core evidence for conviction because the evidence collection process was compliant and without secondary pollution.
- The Anti-Terrorism Detachment of the Municipal Public Security Bureau received a report from the masses that someone was illegally making explosive devices in an abandoned factory in the suburb of the city. After the disposal police arrived at the scene, they found that there were semi-finished homemade explosives, packaging materials and a large number of explosive-making tools left in the factory. There were flammable and explosive chemicals remaining on the scene. Open flames, chemical reagents and powder-based development methods are strictly prohibited, and traditional fingerprint extraction methods cannot be carried out at all. The technical personnel used the DEP-100 Ultraviolet Image Observation and Photography System to carry out ultraviolet scanning on the surface of explosive-making tools and packaging materials in a non-contact way. Without touching or disturbing the on-site items, 5 clear latent fingerprints were quickly extracted. Through fingerprint comparison, the police quickly locked the core suspect, and followed the clues to destroy an illegal explosive-making terrorist gang, eliminating major public safety hazards in time. In this disposal, the non-contact, reagent-free non-destructive extraction feature of this equipment perfectly adapts to the investigation needs of flammable and explosive high-risk scenes. It not only ensures the personal safety of the disposal personnel, but also quickly obtains key conviction evidence, providing decisive technical support for the rapid detection of the case.