便携式正像三波段照明·20X-50X多级放大·白光/蓝光/紫光LED荧光激发·现场微量物证显微观察与文件痕迹检验系统（刑事技术文件检验/工具痕迹/微量物证现场勘查装备）

 

便携式正像三波段照明·20X-50X多级放大·白光/蓝光/紫光LED荧光激发·现场微量物证显微观察与文件痕迹检验系统（刑事技术文件检验/工具痕迹/微量物证现场勘查装备）

〖重要合规前置声明〗 本产品为国家管制类刑事技术检验鉴定专用特种装备，仅面向具备法定执法权限与司法鉴定资质的各级公安机关刑事技术部门、人民检察院技术部门、司法鉴定机构及授权刑事技术实验室定向研发、生产与供应，严禁向任何个人、无资质企业及非授权单位销售或提供。本设备的购置、配备、使用与管理，必须严格遵守国家关于刑事技术装备管理、司法鉴定程序及物证检验的相关法律法规与行业技术标准，必须由经过专业培训、取得相应刑事技术或文件痕迹检验岗位资质的人员规范操作，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检材污损或物证信息遗漏，严禁将本设备用于法定检验鉴定之外的任何用途。

产品概述

便携式正像三波段照明·20X-50X多级放大·白光/蓝光/紫光LED荧光激发·现场微量物证显微观察与文件痕迹检验系统（亦称便携式正像显微镜、三波段照明放大镜）是一款集正像光学观察、多波段光源照明与一体化供电于一体的专业级现场显微检验装备，属于公安刑事技术文件检验、工具痕迹检验及微量物证勘查领域的核心随身检验工具。该产品专为刑事侦查人员与文件、痕迹鉴定人在任何室内外现场环境下，对物证表面微观结构、纹理特征及潜在痕迹进行即时、清晰、正像放大观察深度定制，完美适配搜查现场文件真伪快速初筛、锁具与窗框撬压痕迹初步分析、衣物床单上潜在生物荧光痕迹搜寻及微量纤维毛发形态学预检等一线勘查场景。系统独创性地将伽利略式正像光学系统与白光、蓝光、紫光三波段LED可调照明集成于一台可单手握持的微型机身内，内置180mAh可充电锂电池支持连续工作约2.5小时，同时支持外接电源适配器供电以保障长时间室内检验勤务，从根本上解决了传统现场放大镜倍率有限、单一白光光源难以显现微弱潜在痕迹、以及大型实验室体视显微镜无法携带至野外现场的实战痛点，能够为一线勘查人员提供“正像直观观察、多波段荧光激发、多级倍率切换、双模供电保障”的随身显微检验能力，是进行现场快速文件真伪初筛、工具痕迹形态分析及微量物证观察的关键性刑事技术装备。

技术原理

该显微镜基于伽利略式正像光学系统与多波段LED选择性光谱激发/增强原理协同工作。其光学系统采用物镜与目镜的特定透镜组合，直接产生与被观察物体方向完全一致的正立放大虚像，而非传统复合显微镜的倒置图像。该设计遵循人眼自然观察习惯，使操作者在通过目镜观察时所见即所得，无需在大脑中反向换算方向，极大便利了在现场对擦划痕迹走向、文件笔画交叉顺序等方向敏感型特征的研判与操作。

核心的三波段照明技术集成于物镜前端环形分布的光源阵列中。白色LED提供常规均匀照明，满足一般性宏观及微观形态观察需求；蓝色LED（中心波长约450nm）与紫色LED（中心波长约365nm或405nm）分别发射特定波长的短波可见光与近紫外光。当这些光源照射到物证表面时，某些物质因分子结构特性会吸收激发光能量并发出更长波长的荧光——如体液斑迹、纤维增白剂、特定墨水染料及化学消退试剂残留等——在暗背景下形成显著的荧光反差；另一类物质则因对特定波长光的选择性强吸收而在浅色背景上呈现深色增强对比。操作者通过切换不同照明波段，可在白光、蓝光及紫光三种光照模式间灵活选择，最大化目标痕迹与基底之间的光学反差，从而显现出在单一白光下肉眼难以辨识的潜在擦刮字迹、涂改区域、微量生物斑迹及工具遗留附着物等关键物证信息。

核心功能与合规实战价值

正像光学系统与20X-50X多级放大倍率，提供符合自然观察习惯的现场微观检视能力
设备采用正像光学系统，目镜中所呈现的放大图像与被检物体的方向完全一致，彻底消除了倒像显微镜在定位特定痕迹位置时因图像反向而导致的位移误判风险，尤其适合在现场对擦划痕迹起始方向、文件笔画交叉时序等方向敏感型特征进行直观研判。系统提供从20X至50X的多档或连续可调放大倍率，结合0.25数值孔径物镜，在保证一定工作距离与视场范围的前提下获得丰富的微观细节，满足从宏观定位到显微细查的全流程观察需求。目镜配备±2屈光度视度调节，方便不同视力的操作者裸眼清晰观察，无需更换目镜或佩戴眼镜。

三波段白光/蓝光/紫光LED照明与亮度可调，激发潜在痕迹的多元光学反差
系统集成白光、蓝光、紫光三种LED光源，各波段亮度均可独立调节。操作者在对文件进行变造检验时，可切换至蓝光或紫光模式观察化学消退剂残留的荧光反应与添改笔迹的墨料差异；在搜寻衣物上的潜在生物斑迹时，紫光模式可使精斑、唾液斑等产生特征性荧光；在观察深色金属表面的擦划痕迹时，蓝光模式可增强痕迹轮廓与基底的反差。该多波段光学检验能力为现场勘查人员在没有暗室或实验室辅助光源的条件下，提供了便携式的微量物证光学初筛手段，有效提升了一线勘查中潜在物证的发现概率。

内置锂电池与外接电源双模供电，适应室内外全场景持续勤务需求
设备内置180mAh可充电锂电池，满电状态下在常规亮度档位可持续工作约2.5小时，足以支撑一次完整的现场搜查或多次分散勘查任务。在室内实验室或固定办公场所进行长时间连续检验时，可通过外接电源适配器供电，实现不间断作业。双模供电设计使设备在野外无市电的偏远现场和室内标准化检验工作台之间无缝切换，从能源保障层面彻底解决了随身检验工具因电量耗尽而中断勤务的实战风险。

微型化便携设计与独立调焦倍率调节，满足一线勘查人员随身携带与快速操作需求
整机采用高度集成化与轻量化设计，体积小巧，可轻松放入勘查包或勤务马甲口袋，实现单兵随身携行。设备配备独立的调焦旋钮与倍率调节机构，操作者在单手托举设备贴近检材的同时，另一手即可完成焦距精细调整与倍率切换，操控逻辑直观简洁，符合一线刑事技术人员在狭小空间或不便放置设备的复杂现场环境中快速完成显微检验的专业需求。

合规应用场景

文件污损与变造现场快速初筛场景
在搜查现场或临时办案点，勘查人员使用本显微镜对查获的可疑合同、票据、证件及便签进行白光与蓝光/紫光交替扫描观察，通过荧光反应差异快速发现化学消退痕迹、添改字迹的墨料荧光特征及擦刮区域的纤维破坏痕迹，为后续决定是否对该文件进行扣押并送实验室详细鉴定提供即时的技术判断依据。该快速初筛环节严格遵循文件检验先无损、后有损的检验顺序原则。

工具痕迹与客体微量附着物的现场显微观察场景
在盗窃案件现场，技术人员使用本设备对门锁、窗框上的撬压痕迹、钳剪断面进行白光高倍观察，初步分析线条痕迹的走向、间距及个体特征，同时使用蓝光模式寻找并观察工具在破坏过程中遗留在客体表面的微量金属碎屑、油漆颗粒等转移附着物，为侦查方向判断及工具同一认定提供一线层面的形态学参考。

潜在生物痕迹与微量物证的搜寻与形态学初检场景
在对涉案衣物、床单、纸巾等载体进行现场初步检验时，操作者使用紫光模式搜寻可能存在的精斑、唾液斑等生物荧光痕迹，定位后用白光高倍观察其形态与范围并拍照固定；对从现场提取的纤维、毛发、可疑粉末等微量物证，使用白光模式进行初步形态学观察和种类初判，为物证的进一步提取、保存及实验室鉴定提供指导。

纸币、票据与证件安全防伪特征的现场快速查验场景
在查办假币、伪造票据案件中，侦查人员可在查获现场使用本显微镜对可疑纸币的水印、安全线、微缩文字等防伪特征进行高倍放大观察，或对票据、护照等证件的印刷质量、印章边缘微观形态进行快速预检，辅助判断真伪并明确后续检验重点。

核心技术参数

光学系统方面，本显微镜采用正像成像方式，目镜所见图像与被检物体方向完全一致。放大倍率覆盖20X、25X、30X、35X、40X、45X、50X多档或连续可调，物镜数值孔径为0.25，在保证充足工作距离的同时提供清晰的微观细节呈现。目镜视度调节范围为±2屈光度，满足不同视力操作者的裸眼观察需求。照明系统方面，集成三波段LED光源，包含白光、蓝光、紫光三个独立通道，各波段亮度均可独立调节，满足不同客体与痕迹的光学反差增强需求。电源系统方面，内置180mAh可充电锂电池，满电状态下连续工作时间约2.5小时（视亮度设置而定），支持外接电源适配器供电，适应野外与室内双场景持续作业。操控方面，设备配备独立的调焦功能与倍率调节功能，操作直观便捷。整机定位为专业级微型显微镜，结构紧凑轻便，适用于室内外多种工作环境。

合规实战应用案例

某市公安局经侦支队在侦办一起合同诈骗案件时，在一处临时办公场所查获多份疑似变造的采购合同及收款收据。因现场不具备运回实验室逐一检验的条件，随队刑事技术人员当即使用本便携式正像显微镜，以紫光与蓝光模式逐份对合同上的签名、金额及公章印文进行快速扫描，发现其中两份合同的金额大写数字在蓝光下呈现与原文笔迹完全不同的荧光反应，边缘可见微弱擦刮痕迹。技术人员随即对异常文件进行了重点标记与隔离封存，后经实验室仪器确证为化学消退后重新填写，该现场预检操作为后续鉴定和审讯方向的确定争取了宝贵时间。

某县刑事科学技术室在勘查一起入室盗窃案现场时，在嫌疑人翻窗进入的铝合金窗框边缘发现一处新鲜擦划痕迹。勘查人员使用本显微镜在白光模式下以40X倍率对痕迹进行观察，清晰辨识出线条痕迹的走向特征及末端的微小卷边形态，在蓝光模式下又发现痕迹边缘附着有微量深色颗粒。勘查人员对该处痕迹进行了比例尺拍照固定，并将颗粒提取送理化实验室检验。后经与嫌疑工具样本进行实验室比对，痕迹线条特征与附着物成分均认定与嫌疑人处起获的工具一致，该现场层面的微观痕迹发现与初步分析为案件突破提供了关键物证线索。

厂家信息：北京毕思特联合科技有限公司
网址：https://www.bestlh.com
地址：北京市亦庄开发区经海六路一号院尖子班 C9 独栋
电话：010-56526048

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Portable Erect-Image Triple-Band Illumination · 20X-50X Multi-Level Magnification · White/Blue/Violet LED Fluorescence Excitation · On-Site Trace Evidence Microscopic Observation & Document/Tool Mark Examination System (Criminal Technical Document Examination / Tool Mark / Trace Evidence On-Site Investigation Equipment)

Global site URL：https://xilankeji.en.alibaba.com

〖Important Compliance Precaution〗 This product is a state-controlled specialized equipment for criminal technical forensic examination and identification, which is solely developed, produced and supplied to authorized entities such as criminal technical departments of public security organs, technical departments of people's procuratorates, forensic identification institutions, and authorized criminal technical laboratories with statutory law enforcement authority and forensic identification qualifications. Any sale or supply to individuals, non-qualified enterprises and unauthorized units is strictly prohibited. The procurement, deployment, use and management of this equipment must strictly comply with national laws, regulations and industrial technical standards regarding criminal technical equipment management, forensic identification procedures, and trace evidence examination. Operation must be carried out exclusively by professionally trained personnel holding corresponding criminal technical or document/tool mark examination post qualifications. Unauthorized units and individuals are strictly forbidden from purchasing, using or transferring this equipment. Any contamination of evidence samples or omission of trace evidence information caused by improper operation, as well as any use of this device for purposes other than statutory forensic examination and identification, is strictly prohibited.

Product Overview

The Portable Erect-Image Triple-Band Illumination, 20X-50X Multi-Level Magnification, White/Blue/Violet LED Fluorescence Excitation, On-Site Trace Evidence Microscopic Observation & Document/Tool Mark Examination System (also referred to as the Portable Erect-Image Microscope or Triple-Band Illumination Magnifier) is a professional-grade on-site microscopic examination equipment integrating erect-image optical observation, multi-band light source illumination, and integrated power supply. It constitutes a core portable examination tool in the fields of criminal technical document examination, tool mark examination, and trace evidence investigation. This product is deeply customized for criminal investigators and document/tool mark examiners to perform immediate, clear, erect-image magnified observation of microscopic structures, surface textures, and latent traces on physical evidence in any indoor or outdoor on-site environment. It perfectly adapts to frontline investigation scenarios such as rapid preliminary screening of document authenticity at search scenes, preliminary analysis of prying and leverage marks on locks and window frames, fluorescence-based search for latent biological stains on clothing and bedding, and morphological pre-screening of trace fibers and hairs. The system uniquely integrates a Galilean erect-image optical system with white, blue, and violet triple-band LED adjustable illumination into a micro-sized body that can be held in one hand. A built-in 180mAh rechargeable lithium battery supports continuous operation for approximately 2.5 hours, while an external AC power adapter is also supported to ensure uninterrupted operation during extended laboratory examinations. This fundamentally resolves the operational pain points of traditional on-site magnifiers having limited magnification, difficulty in visualizing latent traces using a single white light source, and the inability to transport large laboratory stereo microscopes to outdoor field scenes. It provides frontline investigators with "erect-image intuitive observation, multi-band fluorescence excitation, multi-level magnification switching, and dual-mode power supply assurance" as portable microscopic examination capability, serving as critical criminal technical equipment for rapid on-site document authenticity pre-screening, tool mark morphology analysis, and trace evidence observation.

Technical Principle

This microscope operates on the synergistic principles of a Galilean erect-image optical system and multi-band LED selective spectral excitation/enhancement. Its optical system utilizes a specific combination of objective and eyepiece lenses to directly produce an erect magnified virtual image that is perfectly aligned with the orientation of the object being observed, rather than the inverted image produced by traditional compound microscopes. This design conforms to the natural observation habits of the human eye, allowing the operator to see exactly what is present through the eyepiece without the need for mental reversal of orientation, greatly facilitating the on-site assessment and handling of direction-sensitive features such as the orientation of scratch marks and the stroke sequence at document intersections.

The core triple-band illumination technology is integrated into a ring-shaped LED array at the front of the objective lens. The white LED provides conventional uniform illumination to meet general macroscopic and microscopic observation needs. The blue LED (center wavelength approximately 450nm) and violet LED (center wavelength approximately 365nm or 405nm) respectively emit specific wavelengths of short-wave visible light and near-ultraviolet light. When these light sources irradiate the surface of physical evidence, certain substances, due to their molecular structural characteristics, absorb the excitation light energy and emit fluorescence at longer wavelengths—such as body fluid stains, fiber optical brighteners, specific ink dyes, and chemical erasure reagent residues—producing a significant fluorescence contrast against a dark background. Other substances exhibit enhanced dark contrast against a light background due to selective strong absorption of specific wavelengths of light. By switching between different illumination bands, the operator can flexibly select among white light, blue light, and violet light illumination modes to maximize the optical contrast between the target trace and the substrate, thereby revealing critical trace evidence information that is difficult to discern with the naked eye under single white light, including latent erasure marks, altered areas, trace biological stains, and tool-derived transfer particles.

Core Functions and Compliance Operational Value

Erect-Image Optical System and 20X-50X Multi-Level Magnification, Providing On-Site Microscopic Examination Capability Aligned with Natural Observation Habits
The device employs an erect-image optical system, where the magnified image presented in the eyepiece is perfectly aligned in orientation with the object being examined. This completely eliminates the risk of displacement misjudgment caused by image inversion when locating specific trace positions using an inverted microscope, making it particularly suitable for the intuitive assessment of direction-sensitive features in the field, such as the starting direction of scratch marks and the stroke sequence at document intersections. The system offers multi-step or continuously adjustable magnification from 20X to 50X. Combined with a 0.25 numerical aperture objective lens, it provides rich microscopic detail while ensuring a certain working distance and field of view, meeting the full-process observation needs from macroscopic localization to microscopic detailed examination. The eyepiece is equipped with ±2 diopter adjustment, enabling operators with different visual acuities to observe clearly with the naked eye without changing eyepieces or wearing glasses.

Triple-Band White/Blue/Violet LED Illumination with Adjustable Brightness, Exciting Multi-Faceted Optical Contrast from Latent Traces
The system integrates three LED light sources: white, blue, and violet, with independently adjustable brightness for each band. When examining documents for alteration, the operator can switch to blue or violet mode to observe the fluorescence reaction of chemical erasure residues and the ink differences of added handwriting. When searching for latent biological stains on clothing, violet mode can cause characteristic fluorescence of seminal and saliva stains. When observing scratch marks on dark metal surfaces, blue mode can enhance the contrast between the trace outline and the substrate. This multi-band optical examination capability provides a portable means of optical pre-screening for trace evidence for on-site investigators lacking darkroom or laboratory auxiliary light sources, effectively enhancing the probability of discovering latent physical evidence in frontline investigations.

Built-In Lithium Battery and External AC Power Dual-Mode Supply, Adapting to Full-Scene Continuous Duty Requirements Indoors and Outdoors
The device has a built-in 180mAh rechargeable lithium battery. On a full charge, it can operate continuously for approximately 2.5 hours at standard brightness settings, sufficient to support a complete on-site search or multiple dispersed investigation tasks. When conducting long-duration continuous examinations in an indoor laboratory or fixed office location, it can be powered via an external AC power adapter, enabling uninterrupted operation. The dual-mode power supply design allows the device to seamlessly transition between remote outdoor scenes without mains electricity and standardized indoor examination workstations, thoroughly resolving the operational risk of a portable examination tool being interrupted due to battery depletion from the energy support level.

Miniaturized Portable Design with Independent Focusing and Magnification Adjustment, Meeting the Carry-On and Rapid Operation Needs of Frontline Investigators
The entire unit features a highly integrated and lightweight design, compact enough to be easily placed into an investigation kit or duty vest pocket, enabling individual officer carry. The device is equipped with independent focusing knobs and magnification adjustment mechanism. While holding the device close to the evidence with one hand, the operator can use the other hand to perform fine focus adjustment and magnification switching. The control logic is intuitive and simple, meeting the professional needs of frontline criminal technical personnel for rapid microscopic examination in confined spaces or complex field environments where it is inconvenient to place the equipment.

Compliant Application Scenarios

Rapid On-Site Document Alteration and Defacement Preliminary Screening Scenario
At search scenes or temporary case handling points, investigators use this microscope to alternately scan suspicious contracts, bills, certificates, and notes under white light and blue/violet light. Through differences in fluorescence reactions, they rapidly identify chemical erasure traces, ink fluorescence characteristics of added handwriting, and fiber damage marks in erased areas, providing immediate technical judgment basis for subsequent decisions on whether to seize the document and submit it for detailed laboratory examination. This rapid pre-screening step strictly follows the principle of non-destructive examination before destructive examination in document examination.

On-Site Microscopic Observation of Tool Marks and Trace Transfer Particles on Object Surfaces Scenario
At a burglary scene, technical personnel use this device to conduct high-magnification observation under white light of prying marks and cutting surfaces on door locks and window frames, preliminarily analyzing the orientation, spacing, and individual characteristics of striation marks. Simultaneously, they use blue light mode to locate and observe trace metal debris, paint particles, and other transfer residues left by tools on object surfaces during the destructive process, providing frontline morphological reference for investigative direction judgment and tool identification.

Search and Morphological Pre-Screening of Latent Biological Traces and Trace Evidence Scenario
During preliminary on-site examination of involved clothing, bedding, tissues, and other substrates, the operator uses violet light mode to search for potential biological fluorescence traces such as seminal and saliva stains. After localization, they observe and photograph their morphology and extent under high magnification with white light. For trace evidence such as fibers, hairs, and suspicious powders collected from the scene, they use white light mode for preliminary morphological observation and initial classification, providing guidance for further evidence collection, preservation, and laboratory identification.

Rapid On-Site Examination of Security and Anti-Counterfeiting Features on Banknotes, Bills, and Certificates Scenario
During the investigation of counterfeit currency and forged document cases, investigators can use this microscope at the seizure scene to conduct high-magnification observation of the security features of suspicious banknotes—such as watermarks, security threads, and microprinting—or perform rapid preliminary inspection of the printing quality and microscopic morphology of stamp edges on bills, passports, and other certificates, assisting in authenticity judgment and defining subsequent examination priorities.

Core Technical Parameters

For the optical system, this microscope adopts erect-image imaging, with the image seen through the eyepiece perfectly aligned in orientation with the object being examined. The magnification covers 20X, 25X, 30X, 35X, 40X, 45X, 50X in multiple steps or continuously adjustable, with an objective numerical aperture of 0.25, providing clear microscopic detail while ensuring sufficient working distance. The eyepiece diopter adjustment range is ±2 diopters, accommodating the naked-eye observation needs of operators with different visual acuities. For the illumination system, a triple-band LED light source is integrated, including three independent channels: white, blue, and violet, with independently adjustable brightness for each band to meet the optical contrast enhancement needs of different objects and traces. Regarding the power system, a built-in 180mAh rechargeable lithium battery supports continuous operation for approximately 2.5 hours on a full charge (depending on brightness settings), with support for external AC power adapter supply, adapting to dual-scene continuous operation in the field and indoors. For operation, the device is equipped with independent focusing function and magnification adjustment function, with intuitive and convenient control. The entire unit is positioned as a professional-grade micro microscope, with a compact and lightweight structure suitable for various indoor and outdoor working environments.

Compliant Field Application Cases

During the investigation of a contract fraud case, the economic crime investigation detachment of a municipal public security bureau seized multiple suspected altered purchase contracts and receipt forms at a temporary business premises. As conditions did not allow for transporting each document back to the laboratory for examination, the accompanying criminal technical personnel immediately used this portable erect-image microscope to rapidly scan the signatures, monetary amounts, and official seal impressions on the contracts one by one under violet and blue light modes. They discovered that the uppercase monetary amounts on two of the contracts exhibited a fluorescence reaction under blue light completely different from that of the original handwriting, with faint erasure marks visible at the edges. The technical personnel immediately flagged and isolated the suspicious documents for sealing and preservation. Subsequent laboratory instrumental confirmation identified them as chemically erased and re-written documents. This on-site pre-screening operation bought valuable time for subsequent forensic examination and the direction of the interrogation.

During the scene investigation of a residential burglary, the criminal technical laboratory of a county public security organ discovered a fresh scratch mark on the edge of an aluminum alloy window frame through which the suspect had entered. Investigators used this microscope in white light mode at 40X magnification to observe the mark, clearly identifying the directional characteristics of the striations and the morphology of the minute curled edge at the terminal end. Under blue light mode, they further discovered trace dark particles adhering to the edge of the mark. Investigators photographically documented the mark with a scale and extracted the particles for submission to the physico-chemical laboratory for examination. Subsequent laboratory comparison with the suspected tool sample confirmed that both the striation characteristics and the composition of the adhering material were consistent with the tool seized from the suspect. This frontline-level microscopic trace discovery and preliminary analysis provided a critical lead for the breakthrough in the case.

Manufacturer Information: Beijing Best United Technology Co., Ltd.
Website: https://www.bestlh.com
Address: Building C9, Jianziban, No.1 Courtyard, Jinghai Sixth Road, Yizhuang Development Zone, Beijing
Tel: 010-56526048