本文關(guān)鍵詞： 拉曼光譜法 激光打印機(jī) 印文朱墨時(shí)序　出處：《中國(guó)政法大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在文件檢驗(yàn)的領(lǐng)域中,朱墨時(shí)序的鑒定是很重要的一個(gè)方面。過(guò)去很長(zhǎng)一段時(shí)間,在涉及朱墨時(shí)序鑒定的案件中,通常采用的檢驗(yàn)方法有切開(kāi)法、顯微鏡檢驗(yàn)法等。傳統(tǒng)的檢驗(yàn)方法很大一部分依靠司法鑒定人員的經(jīng)驗(yàn)以及專業(yè)素質(zhì),司法鑒定的結(jié)果容易受到主觀方面的影響,準(zhǔn)確率偏低,外界很容易質(zhì)疑文書司法鑒定的科學(xué)性。有損的檢驗(yàn)方法也不適用于重要文書的鑒定。而且,當(dāng)激光打印文字層與印文層比較薄的時(shí)候,采用以上檢驗(yàn)方法判斷朱墨時(shí)序變得極其困難。目前,無(wú)損檢驗(yàn)方法已經(jīng)成為發(fā)展趨勢(shì)。隨著科技的發(fā)展和進(jìn)步,激光打印機(jī)走進(jìn)了日常的辦公和生活中,那么問(wèn)題隨之而來(lái),激光打印文件的數(shù)量增多,那么與此相關(guān)的違法犯罪活動(dòng)也日益增多,其中朱墨時(shí)序的案件占很大一部分比例。實(shí)踐中,需要一種能適應(yīng)司法鑒定的準(zhǔn)確率高的無(wú)損檢驗(yàn)方法�；谏鲜霰尘�,筆者搜集了不同品牌、不同型號(hào)的27種激光打印機(jī)的打印文字的實(shí)驗(yàn)樣本27份和20種印文的實(shí)驗(yàn)樣本20份,采用拉曼光譜法分別測(cè)試各個(gè)實(shí)驗(yàn)樣本的拉曼光譜圖;同時(shí)搜集了其中25種激光打印機(jī)打印文字和20種印文先朱后墨、先墨后朱的實(shí)驗(yàn)樣本共計(jì)1000份,采用拉曼光譜成像技術(shù)分別測(cè)試各個(gè)實(shí)驗(yàn)樣本的拉曼光譜成像圖。探索拉曼光譜成像技術(shù)在文件檢驗(yàn)領(lǐng)域朱墨時(shí)序鑒定方面的效果,分析不同激光打印機(jī)的品牌和不同印文材料對(duì)檢驗(yàn)結(jié)果的影響。通過(guò)實(shí)驗(yàn)得出以下結(jié)論:第一,實(shí)驗(yàn)一建立了激光打印文字墨跡的拉曼光譜數(shù)據(jù)庫(kù),并依據(jù)譜圖將其分為七類(見(jiàn)表3),而且分析得知激光打印文字墨跡的成分和品牌沒(méi)有關(guān)系,采用拉曼光譜法可以區(qū)分不同物質(zhì)成分的激光打印文字墨跡;第二,實(shí)驗(yàn)二建立了印文的拉曼光譜數(shù)據(jù)庫(kù),并依據(jù)譜圖將其分為十一類(見(jiàn)表6),而且分析得知印文色料的成分和種類沒(méi)有關(guān)系,采用拉曼光譜法可以區(qū)分不同物質(zhì)成分的印文;第三,實(shí)驗(yàn)三采用拉曼光譜成像技術(shù)檢驗(yàn)激光打印文字墨跡和印文的朱墨時(shí)序,取得了較好的成果,可以分析判斷朱墨時(shí)序。并且發(fā)現(xiàn)拉曼光譜成像技術(shù)在區(qū)分激光打印文字墨跡和印泥、印油、光敏印油和原子印油等種類印文的朱墨時(shí)序方面的檢驗(yàn)效果不太一樣,檢驗(yàn)激光打印文字墨跡和印泥印文朱墨時(shí)序的效果最好。最后,基于上述研究,本文針對(duì)拉曼光譜法檢驗(yàn)激光打印文字與印文朱墨時(shí)序的相關(guān)問(wèn)題提出幾點(diǎn)建議和反思。并在本論文的第五章例舉了法大法庭科學(xué)技術(shù)鑒定研究所之前鑒定過(guò)的有關(guān)朱墨時(shí)序的一則案例,通過(guò)采用拉曼光譜成像技術(shù)檢驗(yàn)鑒定檢材,鑒定的結(jié)果驗(yàn)證了拉曼光譜成像技術(shù)在朱墨時(shí)序鑒定方面的可行性。
[Abstract]:In the field of document inspection, the identification of the timing of Zhu and Mo is an important aspect. In the past a long time, in the cases involving the timing identification of Zhu and ink, the method of opening is usually used. The traditional testing methods depend on the experience and professional quality of forensic experts. The results of judicial identification are easy to be affected by subjective aspects and the accuracy is on the low side. It is very easy for the outside world to question the scientific nature of the judicial identification of the document. The damaging test method is also not applicable to the identification of important documents. Moreover, when the laser print writing layer and the print layer are thin. It is very difficult to judge the timing of Zhu ink by the above methods. At present, the nondestructive testing method has become a trend. With the development and progress of science and technology, laser printers have entered into the daily office and life. Then the problem followed, the number of laser printing documents increased, then the related criminal activities are also increasing, among which Zhu Mo timing cases account for a large proportion. In practice. Need to be able to adapt to the high accuracy of forensic non-destructive testing method. Based on the above background, the author collected different brands. There are 27 experimental samples of 27 kinds of laser printers and 20 experimental samples of 20 kinds of printed characters. The Raman spectra of each experimental sample are measured by Raman spectroscopy. At the same time, 25 kinds of laser printer printed text and 20 kinds of printing text first Zhu and then ink, first ink and then Zhu experimental samples, a total of 1000 samples. Raman spectroscopic imaging technique was used to test the Raman spectrum images of each experimental sample, and to explore the effect of Raman spectrum imaging technology in the field of document verification in the field of time sequence identification of Zhu ink. The effects of different brands of laser printers and different printing materials on the test results are analyzed. The following conclusions are drawn through the experiment: first, the Raman spectrum database of laser printed ink is established in experiment 1. According to the spectrum, it is divided into seven categories (see Table 3), and the analysis shows that the composition of laser print ink has no relationship with the brand. The Raman spectrum method can distinguish the different material components of laser print ink. Second, the second experiment establishes the Raman spectrum database of the printed language, and divides it into eleven categories according to the spectrum (see Table 6), and the analysis shows that the composition and the type of the printing pigment have no relation. Raman spectroscopy can be used to distinguish the printing of different material components. Third, the third experiment uses Raman spectrum imaging technology to test the sequence of ink and ink in laser print, and good results have been achieved. We can analyze and judge the time sequence of ink, and find that Raman spectroscopy imaging technology is used to distinguish between laser print ink and print slime and printing oil. Guang Min printing oil and atomic printing oil and other types of printing ink time sequence test effect is not the same, laser print ink and mud printing ink timing is the best. Finally, based on the above research. In this paper, some suggestions and reflections are put forward to examine the time sequence of laser printed text and printing ink by Raman spectroscopy. In the 5th chapter of this paper, the author gives an example of the identification before the Institute of Science and Technology Appraisal of the French Court of Justice. A case about the timing of Zhu and Mo. The feasibility of Raman spectroscopy imaging in the timing identification of ink and ink was verified by the results of Raman spectrum imaging.
【學(xué)位授予單位】：中國(guó)政法大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：D918.92

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