광학적 특성 평가기법을 이용한 지문현출 시약 1,2-IND와 BY40의 광발광 모드 최적조건에 대한 연구
Investigation of Optimum Conditions for Photoluminescence Mode of Fingerprint Reagent 1,2-IND and BY40 Using Optical Characteristic Evaluation
Fingerprints are formed on various surfaces in crime scenes. Cyanoacrylate fuming with Basic Yellow 40 is usually used on non-porous surfaces and 1,2-Indanedione is the most common reagent for developing latent fingerprints. In general, developed fingerprints are observed using a light source and filter within corresponding wavelength range. This observation technique is called photoluminescence mode. Since the photoluminescence mode uses light sources and filters in the darkroom, it is easy to observe only the developed fingerprints. Therefore, many studies have been conducted to find best filter and light combination of latent fingerprint development reagents. But most of the studies on optimal photoluminescence conditions were based on visual evaluation methods such as the Home Office Grading System or SWGFAST. Since these visual evaluation criteria are based on the evaluator's visual judgment, the results may vary depending on the evaluator's competency, and it is difficult to compare if the difference in the degree of enhancement and appearance is small. To solve this problem, this study aims to quantify the quality of fingerprints and establish the optimal conditions for fingerprint development reagent(1,2-Indanedione, Basic Yellow 40) commonly used on porous and non-porous surfaces. Evaluation factors were set as optical characteristics that can affect the evaluation of the fingerprint, referring to previous studies. Brightness, contrast, signal to noise ratio were set as evaluation factors. More detailed comparison was possible using the optical characteristic evaluation technique, and the optimal light source and filter conditions according to the reagent could be found.
목차
Abstract Ⅰ. 서론 Ⅱ. 재료 및 방법 1. 실험 장비 및 재료 2. 지문 형성 3. 1,2-IND 지문 현출 4. BY40 지문 현출 5. 지문평가 방법 Ⅲ. 결과 및 고찰 1. 1,2-IND 로 현출된 지문 평가 결과 2. BY40 으로 현출된 지문 평가 결과 Ⅳ. 결론 Ⅴ. 사사 Ⅵ. 참고문헌
법과학 분야는 사회정의 구현에 있어 크나큰 가치가 있음에도 불구하고 우리나라에서는 이 분야에 대한 인식이 미흡하여 선진 외국에 비해 침체되어 있는 실정이다. 이에 우리나라에서도 법과학 분야와 관련 있는 학계, 연구기관, 수사기관 등 유관 단체들로 구성된 한국 법과학회를 창립하여 이 분야를 활성화 시켜 과학수사를 한층 더 발전시키기 위함을 목적으로 한다.