Multimode Imaging in the Thermal Infrared for Chemical Contrast Enhancement. Part 3: Visualizing Blood on Fabrics

摘要

Infrared thermal imaging using lock-in and molecularnfactor computing methods for the detection of blood on andark, acrylic fabric is shown. Contrast differences betweennthe clean fabric and the fabric stained with blood dilutednas low as 1:100 are reported. We have also demonstratednthat this method can be used to discriminate between anbloodstain and four common interfering agents (bleach,nrust, cherry soda, and coffee) to other blood detectionnmethods. These results indicate that this system could benuseful for crime scene investigations by focusing nondestructivenattention on areas more likely to be suitable fornfurther analysis.