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NCJRS Abstract

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NCJ Number: 98859 Find in a Library
Title: Automatic Refractive Index Measurement of Glass Particles
Journal: Forensic Science International  Volume:27  Issue:4  Dated:(April 1985)  Pages:247-260
Author(s): J Locke; M Underhill
Date Published: 1985
Page Count: 14
Format: Article
Language: English
Country: Iran
Annotation: An automatic instrument for Glass Refractive Index Measurement (GRIM), developed by Foster and Freeman Ltd., has been evaluated and adapted to meet the requirements of the UK Forensic Science Service.
Abstract: The apparatus is microprocessor controlled and uses the signal from a CCTV camera to detest the match temperature of the glass. Prototypes were evaluated at the Metropolitan Police Forensic Science Laboratory, at the Central Research Establishment, Home Office Forensic Science Service and at the Home Office Forensic Science Laboratory, Aldermaston. The performance of GRIM was compared to that of the Mettler apparatus currently in use with special regard to precision and longterm stability. GRIM was found to be well suited for operational use. (Publisher abstract)
Index Term(s): Crime laboratory equipment; Evidence identification; Forensic sciences; Glass analysis; Mineral analysis
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