显微光谱系统——紫外-可见显微分光·红外显微光谱·拉曼微区分析多模块集成无损物证鉴定平台（刑事技术/司法鉴定微量物证检验工作站）

 

显微光谱系统——紫外-可见显微分光·红外显微光谱·拉曼微区分析多模块集成无损物证鉴定平台（刑事技术/司法鉴定微量物证检验工作站）

〖重要合规前置声明〗 本产品为国家管制类刑事技术侦查取证鉴定专用装备，仅面向具备法定执法权限的各级公安机关、人民检察院、人民法院、国家安全机关、司法鉴定机构及授权执法单位定向研发、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及司法鉴定活动的相关法律法规与行业技术标准，必须由经过专业培训、取得相应执法或司法鉴定资格的人员规范操作，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的物证污染、数据失真或鉴定程序违法，严禁未经授权篡改、泄露、非法复制涉案光谱数据及鉴定结论。

产品概述

显微光谱系统——紫外-可见显微分光·红外显微光谱·拉曼微区分析多模块集成无损物证鉴定平台（亦称显微光谱系统、集成显微光谱工作站）是一套将紫外-可见分光光度、显微红外光谱及显微拉曼散射技术模块化融合，并与高倍光学显微镜深度耦合的微区、无损物证分析专用设备，属于公安刑事技术、司法鉴定及法医实验室领域核心的微量物证成分鉴定装备。该产品专为刑事侦查与司法鉴定中对纤维、涂料、墨水、油墨、毒品残留、爆炸物痕量物证及文件制成时间等复杂检材的科学鉴定而深度定制，完美适配微量、珍贵检材的微区原位分析、多光谱联用比对及实验室标准化流转等严苛工作环境。系统通过在同一平台上实现微米级精准定位与多模式光谱“化学指纹”采集的无缝结合，从根本上解决了传统单一光谱设备检材适应性窄、微量样品转移污染风险高、异源数据关联困难等实战痛点，能够为鉴定人提供原位、无损、高灵敏度的物质成分定性、定量与比对分析结果，是满足司法鉴定机构资质认定装备配置要求、推动物证检验从单纯形态观察向确定成分解析跃升的核心刑事技术装备。

技术原理

该系统严格遵循光学光谱分析原理，以“显微精准定位”与“多模式光谱联合采集”的技术融合为核心架构。研究级光学显微镜提供高分辨率的样品微观形态观察视野，并通过共焦光路设计实现微米级区域的精准空间滤波与定位，确保采集的每一束光谱信号均来自目标微小区域，有效屏蔽周围基底的背景干扰。系统集成的核心光谱模块分别基于不同原理获取物质的化学特征信息：紫外-可见显微分光模块通过测量微区在特定波长范围内的吸收、反射或荧光发射光谱，分析物质的电子跃迁与颜色属性；显微红外模块利用物质分子对中红外辐射的特征吸收谱带，解析有机官能团及分子结构；显微拉曼模块则通过采集单色激光照射样品后产生的非弹性散射光，获取分子振动与转动能级的特征“指纹”光谱。

在工作流程中，鉴定人首先通过显微镜明场或荧光模式锁定目标纤维、单颗油墨颗粒或笔划交叉点等微区，随后根据检材特性选择适宜的光谱模式进行无损扫描。光谱数据由内置的高性能探测器（如热电制冷背照式CCD）接收，凭借其高量子效率与极低暗噪声特性，实现弱信号的高信噪比采集。最终，系统软件将光谱图与采集位置对应的显微图像进行原位关联存储，并通过谱库检索与化学计量学算法进行成分匹配与比对鉴定。整个操作流程对检材无损耗、无污染，符合物证检验中关于检材保全与可重复鉴定的法定要求，所有分析数据均保存原始光谱及操作日志，具备不可篡改的合规链路，确保鉴定结论的客观性与司法完整。

核心功能与合规实战价值

高兼容性多光谱联用，覆盖宽域化学成分分析需求
系统通过模块化架构设计，可在同一仪器平台上灵活集成紫外-可见显微分光、显微红外光谱、显微拉曼光谱等多种分析模式，光谱探测范围覆盖紫外到红外乃至更长波段。同时支持反射、透射、荧光及偏振等测量配置，能够从容应对从有色纤维染料、油漆交联剂到生物组织代谢物等复杂异质微量物证的检验需求。这一高兼容性设计满足了司法鉴定机构资质认定中要求具备多技术联用能力以互相印证结果的规范，为微量物证鉴定提供多维度的“光谱证据”支撑，避免单一方法结论的不确定性。

微区定位与共焦隔离技术，实现精准原位无损检测
依托显微镜的高倍放大与共焦光路设计，系统可将分析光斑精确聚焦至微米级目标区域，采样面积极小且过程对检材几乎无耗损，确保珍贵、微量现场检材的完整性与可再检性。专门针对刑事勘查中提取的单根纤维、微小玻璃碎屑、单颗墨水颜料等疑难样本，有效解决传统取样分析中因分离背景困难或样品量不足而无法检测的技术瓶颈。这种对检材的原位无损分析能力，保障了检材流转链条的完整与鉴定程序合规，符合物证检验关于检材保护与退样的法定要求。

高灵敏度探测器与同步成像，构建光谱-形态双维证据体系
系统采用高性能热电制冷探测器，具备高量子效率与宽动态范围，即使在微弱信号条件下也可获取信噪比达1000:1级别的高质量光谱。同时，在记录光谱数据的过程中自动捕获样品的高清显微图像，实现分子光谱化学成分与微观形态特征的原位共定位与关联捆绑。这一功能让鉴定人可将物质成分的“化学指纹”与检材的物理形态直接对应，出具融合图像与谱图的双维鉴定报告，显著增强鉴定意见在法庭质证中的直观性与客观说服力。

模块化扩展与简便操控，匹配实验室高效鉴定流转需求
系统采用模块化结构，各光谱模块可独立维护并可依据鉴定业务量的发展逐步升级选配。微型光谱仪设计紧凑，配套软件界面直观，集成快速自动定位、采集、谱库检索及数据批处理功能，有效缩短单个检材的分析周期，适应法医物证实验室案件量大、检材种类繁多的快速流转要求。此外，系统支持根据鉴定要求，自动生成包含关键光谱图、匹配度及鉴定意见的标准化鉴定文书初稿，进一步提升了鉴定流程的规范性与文书制作效率。

合规应用场景

微量物证比对与同源性鉴定场景
在各类刑事案件侦查中，鉴定人使用本系统对现场提取的纤维、油漆碎片、玻璃、土壤等微量检材，与嫌疑人处获取的比对样本进行多模式光谱分析。通过比对紫外-可见光谱的吸收峰位、红外光谱的特征吸收带或拉曼光谱的共振峰，解析检材与样本所含有机染料、无机填料、交联体系等化学成分是否一致，为物证同源性判断提供客观的光谱学鉴定依据，鉴定文书可作为定罪量刑的关键科学证据。

文件检验与疑难时序鉴定场景
针对经济犯罪或伪造文书案件中涉及的墨迹、印油、纸张等书写材料，鉴定人利用显微红外或显微拉曼模块，对不同种类的墨水、墨粉进行快速成分鉴别，判断文件是否存在添加或篡改。更为关键的是，利用共焦显微拉曼的层析纵深扫描能力，可对笔划交叉点进行逐层光谱采集，通过分析先后书写材料的成分覆盖或混合特征，为解决“朱墨时序”这一长期困扰文件检验领域的专业难题提供直接证据，支撑鉴定意见。

毒品及爆炸物痕量残留快速筛查场景
在涉毒、涉爆案件侦办中，系统可对现场发现的疑似毒品颗粒、爆炸物残留痕量检材进行原位的显微拉曼或红外光谱检测。借助微区分析能力，无需复杂前处理即可在数分钟内获取检材的分子光谱特征，通过与管制物品谱库迅速比对完成成分初筛与定性，为侦查方向判定及案件深挖提供关键线索。全流程操作在严格管控的实验室环境下进行，符合国家关于管制物品检验鉴定的安全管理规范。

司法鉴定机构能力标准化建设场景
作为司法鉴定机构资质认定和实验室认可中物证鉴定领域的重要配置设备，本显微光谱系统以其一机多能、覆盖多专业的特性，同步支撑文书鉴定、微量物证鉴定和法医毒物分析等多个领域的检验需求。其标准化的光谱数据库管理、溯源的数据记录以及无损的检验方式，满足了行业技术标准对检验方法先进性、数据可追溯性和出庭质证支撑力的高要求，为鉴定机构整体技术水平的提升与能力验证通过提供了核心装备保证。

核心技术参数

整体物理构型方面，该显微光谱系统主机结构紧凑，尺寸约为157mm×115mm×41mm，光度计部分重量约769g，便于集成至标准实验室台面或车载勘查平台，不占用过多空间资源。

光学平台与光谱采集性能方面，采用交叉式Czerny-Turner光路设计，焦距100mm，入射狭缝提供10μm、25μm、50μm、100μm、200μm等多种规格选择，配合多种可选光栅，实现0.18nm至7.05nm的可调光学分辨率，波长覆盖范围宽达200nm至1100nm。系统具备±0.5nm波长精度与±0.1nm波长重复性，确保多次测量结果的高度一致。信噪比达到450:1，动态范围10000:1，A/D转换位数16 bits，暗噪声低至6 RMS，积分时间可在11ms至120s之间灵活设定，杂散光抑制性能为0.1% (600nm处)，校正线性度优于99%。

探测器与信号检测方面，内置高性能背照式面阵探测器，有效像素区域2048×64像素，像元尺寸14μm×14μm，响应范围200nm至1100nm，配合热电制冷技术保障长时间工作下的低暗电流与高灵敏度。系统配备消高阶滤光片及多波段长通前置滤光片，有效去除高阶衍射与杂散光干扰；光纤接口采用数值孔径0.22的SMA905标准连接器，便于与显微镜及其他光学附件稳固耦合。

测量模式与扩展功能方面，系统支持反射、透射、荧光及偏振测量，可在软件中快速切换。具备光谱Mapping面扫描及共焦成像功能，可对不均匀样品进行微区化学成分分布表征。模块化架构支持各光谱模块插拔维护与按需升级，并配有专用的光谱分析软件及鉴定文书自动生成系统，能够直接输出符合行业规范格式的图文鉴定报告。电源功耗为200mA（5V DC供电），适合全天候运行。

合规实战应用案例

某市公安刑事科学技术研究所在侦办一起系列盗窃破坏通信设施案件中，嫌疑人衣物表面附着的几根深色纤维成为关键物证。由于纤维极其短小且颜色混杂，常规显微镜难以判断其与现场剪断线缆外皮材料是否同源。鉴定人员使用本显微光谱系统，借助高倍定位锁定单根纤维，采用紫外-可见显微分光与显微红外光谱模块进行原位检测，获得了纤维染料与基体树脂的完整特征光谱。经与现场线缆样本的谱图对比，两者在紫外吸收峰形及红外官能团特征带上的高度匹配，出具了同源认定光谱鉴定意见。该结果被法庭作为关键间接证据采信，为认定嫌疑人犯罪事实提供了有力的科学支撑。

某省级司法鉴定中心接受检察机关委托，对一份涉嫌商业欺诈的案件中关键合同文件的形成时间进行鉴定。争议焦点为文件签字处笔迹与印章印文的形成时序（朱墨时序）问题。中心物证室使用显微拉曼模块，对签名字迹与红色印油交叉处的微观区域进行纵向共焦拉曼逐层扫描，通过分析不同深度的光谱成分变化，确认出墨迹成分在下、印油成分在上的层次关系，据此出具了认定时序的专业鉴定意见。该鉴定过程严格遵循司法鉴定程序，获取的光谱原始数据及图像完整存档，为检察机关审查案件真伪、决定是否提起公诉提供了不可替代的技术性证据支持。

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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Micro-Spectroscopy System — UV-Visible Micro-Spectrophotometry · Infrared Micro-Spectroscopy · Raman Micro-Analysis Multi-Module Integrated Non-Destructive Trace Evidence Examination Platform (Criminal Technology/Forensic Science Trace Evidence Analysis Workstation)

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

〖Important Compliance Precaution〗 This product is a state-controlled specialized equipment for criminal technical investigation, evidence collection and forensic identification, which is solely developed, produced and supplied to authorized law enforcement agencies such as public security organs, procuratorates, courts, national security organs, forensic identification institutions and authorized enforcement units with statutory law enforcement authority. 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 governing criminal technical equipment and forensic identification activities. Operation must be carried out exclusively by professionally trained personnel holding corresponding law enforcement or forensic identification qualifications. Unauthorized units and individuals are strictly forbidden from purchasing, using or transferring this equipment. Any contamination of physical evidence, distortion of spectral data, or violation of forensic procedure arising from improper operation, as well as unauthorized tampering with, leaking, or illegally copying case-related spectral data and identification conclusions, are strictly prohibited.

Product Overview

The Micro-Spectroscopy System — UV-Visible Micro-Spectrophotometry, Infrared Micro-Spectroscopy, Raman Micro-Analysis Multi-Module Integrated Non-Destructive Trace Evidence Examination Platform (also referred to as the Micro-Spectroscopy System or Integrated Micro-Spectroscopy Workstation) is a specialized, non-destructive micro-area trace evidence analysis instrument that modularly combines UV-Visible spectrophotometry, micro-infrared spectroscopy and micro-Raman scattering techniques, deeply coupled with a high-magnification optical microscope. It constitutes a core trace evidence composition identification equipment in the fields of criminal technology, forensic science and forensic laboratories. This product is deeply customized for the scientific examination of complex and challenging evidence materials in criminal investigation and forensic identification, including fibers, paints, inks, toners, drug residues, explosive traces and document dating. It is perfectly suited for rigorous operational environments such as in-situ micro-area analysis of minute and precious specimens, multi-spectroscopic joint comparison, and standardized laboratory workflow. By seamlessly integrating micron-level precise positioning with multi-modal spectroscopic “chemical fingerprint” acquisition on a single platform, the system fundamentally resolves the pain points of traditional single-spectrometer equipment, such as limited sample adaptability, high risk of contamination during micro-sample transfer, and difficulty in correlating heterogeneous data. It provides examiners with in-situ, non-destructive, high-sensitivity qualitative, quantitative and comparative analysis results of material composition, serving as the core criminal technical equipment that meets the equipment configuration requirements for forensic identification institution qualification accreditation and drives the advancement of trace evidence examination from mere morphological observation to definitive compositional analysis.

Technical Principle

The system is built strictly upon the principles of optical spectroscopy analysis, with the technological integration of “micro-precision positioning” and “multi-modal joint spectral acquisition” at its core. A research-grade optical microscope provides high-resolution observation of the sample’s microscopic morphology, and through a confocal optical path design achieves micron-scale precise spatial filtering and positioning, ensuring that every collected spectral signal originates exclusively from the targeted micro-area, effectively shielding environmental background interference from the substrate. The integrated core spectroscopic modules acquire the material’s chemical characteristic information based on different principles: the UV-Visible micro-spectrophotometry module analyzes the electronic transitions and color attributes of substances by measuring the absorption, reflection or fluorescence emission spectra of the micro-area within a specific wavelength range; the micro-infrared module utilizes the characteristic absorption bands of molecular bonds to mid-infrared radiation to resolve organic functional groups and molecular structures; the micro-Raman module obtains the characteristic “fingerprint” spectra of molecular vibrational and rotational energy levels by collecting the inelastic scattered light generated after monochromatic laser illumination of the sample.

During the workflow, the examiner first uses the microscope’s bright-field or fluorescence mode to lock onto the target micro-area, such as a single fiber, a single toner particle or a pen stroke intersection, and then selects the appropriate spectroscopic mode for non-destructive scanning based on the sample’s characteristics. The spectral data is received by a built-in high-performance detector (such as a thermoelectrically cooled back-illuminated CCD), which, with its high quantum efficiency and extremely low dark noise, achieves high signal-to-noise ratio acquisition of weak signals. Ultimately, the system software correlatively stores the spectra with the microscopic images of the acquisition location, and performs composition matching and comparative identification through spectral library searches and chemometric algorithms. The entire operational workflow is consumable-free and non-contaminating to the sample, meeting the statutory requirements for evidence preservation and repeatable examination in trace evidence analysis. All analytical data preserves the original spectra and operation logs, possessing tamper-proof compliance chains, ensuring the objectivity and judicial integrity of the identification conclusions.

Core Functions and Compliance Operational Value

High-Compatibility Multi-Spectroscopy Combined Use, Covering Broad Chemical Composition Analysis Needs
Through a modular architecture design, the system can flexibly integrate multiple analytical modes such as UV-Visible micro-spectrophotometry, micro-infrared spectroscopy and micro-Raman spectroscopy onto a single instrument platform, with spectral detection range covering from ultraviolet to infrared and even longer wavelengths. It also supports measurement configurations including reflectance, transmittance, fluorescence and polarization, enabling it to calmly handle the examination needs of complex and heterogeneous trace evidence ranging from colored fiber dyes and paint cross-linkers to biological tissue metabolites. This high-compatibility design meets the regulatory requirement for forensic identification institutions to possess multi-technique joint-use capabilities for mutual corroboration of results, providing multi-dimensional “spectral evidence” support for trace evidence identification and avoiding the uncertainty of single-method conclusions.

Micro-Area Positioning and Confocal Isolation Technology, Achieving Precise In-Situ Non-Destructive Testing
Relying on the high magnification of the microscope and confocal optical path design, the system can precisely focus the analytical spot onto a micron-scale target area, with an extremely small sampling area and virtually no sample consumption, ensuring the integrity and re-examinability of precious and minute crime scene evidence. It specifically targets challenging samples such as single fibers, tiny glass fragments and single ink pigment particles extracted during criminal investigations, effectively resolving the technical bottleneck where traditional sampling analysis fails due to difficulties in background separation or insufficient sample quantity. This in-situ non-destructive analysis capability for evidence ensures the completeness of the chain of custody and the compliance of the identification procedure, meeting the statutory requirements for evidence preservation and return in trace evidence examination.

High-Sensitivity Detector and Synchronized Imaging, Constructing a Dual-Dimensional Evidence System of Spectroscopy and Morphology
The system employs a high-performance thermoelectrically cooled detector with high quantum efficiency and wide dynamic range, capable of obtaining high-quality spectra with a signal-to-noise ratio reaching 1000:1 even under weak signal conditions. Simultaneously, it automatically captures high-definition microscopic images of the sample during the spectral data recording process, achieving in-situ co-localization and correlated binding of molecular spectroscopic chemical composition and microscopic morphological features. This function allows the examiner to directly correlate the material’s “chemical fingerprint” with the physical morphology of the evidence, generating dual-dimensional expert reports that integrate images and spectra, significantly enhancing the intuitiveness and objective persuasiveness of identification opinions during court cross-examination.

Modular Expandability and Simple Operation, Matching the Efficient Identification Workflow Needs of Laboratories
The system adopts a modular structure where each spectroscopic module can be independently maintained and progressively upgraded or optionally configured according to the growth of identification service volume. The miniaturized spectrometer features a compact design, with intuitive supporting software that integrates rapid auto-positioning, acquisition, spectral library search and batch data processing functions, effectively shortening the analysis cycle per evidence item and adapting to the fast turnaround requirements of forensic evidence laboratories with high case volumes and diverse evidence types. Additionally, the system supports the automatic generation of standardized expert document drafts containing key spectra, matching scores and identification opinions based on examination requirements, further enhancing the standardization of the identification workflow and document production efficiency.

Compliant Application Scenarios

Trace Evidence Comparison and Common-Source Identification Scenario
In the investigation of various criminal cases, examiners use this system to perform multi-modal spectroscopic analysis on trace evidence such as fibers, paint chips, glass and soil collected from the scene, comparing them with known samples obtained from suspects. By comparing the absorption peak positions in UV-Visible spectra, characteristic absorption bands in infrared spectra or resonance peaks in Raman spectra, they analyze whether the organic dyes, inorganic fillers, cross-linking systems and other chemical components in the evidence and samples are consistent, thereby providing objective spectroscopic identification evidence for common-source judgment. The resulting examination report can serve as critical scientific evidence for conviction and sentencing.

Document Examination and Difficult Temporal Sequence Identification Scenario
For writing materials such as inks, stamp impressions and paper involved in economic crime or forged document cases, examiners utilize the micro-infrared or micro-Raman module to rapidly identify the composition of different ink and toner types, determining whether additions or alterations exist in the document. More critically, leveraging the depth-profiling scanning capability of confocal micro-Raman, spectral data can be collected layer-by-layer at pen stroke intersections. By analyzing the compositional covering or mixing characteristics of sequentially written materials, direct evidence is provided to resolve the long-standing professional challenge of determining the sequence of intersecting strokes in the field of document examination, thus supporting expert opinions.

Rapid Screening Scenario for Trace Residues of Drugs and Explosives
In the investigation of drug-related and explosive-related cases, the system can perform in-situ micro-Raman or infrared spectroscopic detection on trace evidence such as suspected drug particles and explosive residues found at the scene. With its micro-area analysis capability, the molecular spectral features of the evidence can be obtained within minutes without complex pre-treatment. Rapid component screening and qualification are completed by instantly comparing against a spectral library of controlled substances, providing critical clues for investigative direction and case deepening. All process operations are conducted under a strictly controlled laboratory environment, complying with national safety management regulations for the examination and identification of controlled items.

Forensic Identification Institution Capability Standardization Construction Scenario
As an important piece of configuration equipment in the trace evidence examination field for forensic identification institution qualification accreditation and laboratory accreditation, this Micro-Spectroscopy System, with its characteristic of one instrument offering multiple functionalities covering multiple disciplines, simultaneously supports the examination needs across several professional areas, including document examination, trace evidence examination and forensic toxicological analysis. Its standardized spectral database management, traceable data recording and non-destructive examination methodology meet the high requirements of industry technical standards for advanced examination methods, data traceability and courtroom testimony support capabilities. It provides core equipment assurance for the overall technical level improvement and successful proficiency testing of identification institutions.

Core Technical Parameters

In terms of overall physical configuration, the mainframe of this Micro-Spectroscopy System features a compact structure with dimensions of approximately 157mm × 115mm × 41mm, and the photometer unit weighs about 769g, facilitating integration onto standard laboratory benchtops or mobile vehicle-mounted investigation platforms without occupying excessive space resources.

Regarding optical platform and spectral acquisition performance, the system adopts a crossed Czerny-Turner optical path design with a focal length of 100mm. The entrance slit offers multiple specification choices including 10μm, 25μm, 50μm, 100μm, and 200μm. Coupled with a variety of optional gratings, it achieves adjustable optical resolution ranging from 0.18nm to 7.05nm, with an ultra-wide wavelength coverage range of 200nm to 1100nm. The system features wavelength accuracy of ±0.5nm and wavelength repeatability of ±0.1nm, ensuring high consistency across multiple measurements. The signal-to-noise ratio reaches 450:1, with a dynamic range of 10000:1, 16-bit A/D conversion, dark noise as low as 6 RMS, and an integration time flexibly adjustable between 11ms and 120s. Stray light suppression performance is 0.1% (at 600nm), and corrected linearity exceeds 99%.

In terms of detector and signal detection, a built-in high-performance back-illuminated area array detector features an effective pixel area of 2048×64 pixels with a pixel size of 14μm × 14μm, a response range of 200nm to 1100nm. Thermoelectric cooling technology ensures low dark current and high sensitivity during prolonged operation. The system is equipped with order-sorting filters and multi-band long-pass pre-filters to effectively remove higher-order diffraction and stray light interference. The fiber optic interface uses a standard SMA905 connector with a numerical aperture of 0.22, facilitating stable coupling with the microscope and other optical accessories.

Concerning measurement modes and expansion functions, the system supports reflectance, transmittance, fluorescence and polarization measurements, which can be rapidly switched within the software. It possesses spectral mapping area scanning and confocal imaging functions, enabling the characterization of chemical composition distribution in micro-areas of inhomogeneous samples. The modular architecture supports plug-and-play maintenance and on-demand upgrades of each spectroscopic module, and is accompanied by dedicated spectral analysis software and an automatic expert report generation system capable of directly outputting illustrated expert reports conforming to industry standard formats. Power consumption is 200mA (5V DC power supply), suitable for around-the-clock operation.

Compliant Field Application Cases

During the investigation of a series of theft and sabotage of communication facilities, the criminal science and technology research institute of a municipal public security bureau identified several dark fibers adhering to a suspect's clothing as key physical evidence. Because the fibers were extremely short and mixed in color, conventional microscopy could not easily determine whether they originated from the same source as the outer sheath material of the cut cables at the scene. Examiners used this Micro-Spectroscopy System, locked onto individual fibers with high magnification, and conducted in-situ testing using UV-Visible micro-spectrophotometry and micro-infrared spectroscopy modules, obtaining complete characteristic spectra of the fiber dyes and base resin. Comparison with the spectra of the on-site cable samples revealed a high match in both the UV absorption peak shapes and infrared functional group characteristic bands, leading to a spectroscopic opinion confirming common source. This result was admitted by the court as key circumstantial evidence, providing strong scientific support for establishing the suspect's criminal facts.

A provincial-level forensic science center accepted a commission from a procuratorial organ to examine the formation time of a critical contract document in a case involving suspected commercial fraud. The central dispute was the formation sequence (stroke order) between the handwritten signature and the seal impression on the document. The center’s trace evidence laboratory used the micro-Raman module to perform vertical confocal Raman depth profiling scanning on the micro-area at the intersection of the signature strokes and red stamp ink. By analyzing the changes in spectral composition at different depths, they confirmed a layered relationship where the ink component was underneath and the stamp ink component was on top, based on which a professional opinion determining the temporal sequence was issued. This identification process strictly followed forensic examination procedures, and the acquired raw spectral data and images were completely archived, providing irreplaceable technical evidence support for the procuratorial organ to review the authenticity of the case and decide whether to initiate prosecution.

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