Our Forensic Document Examination Laboratory
Our Forensic Document Examination Laboratory is equipped with state-of-the-art scientific instruments, forensic imaging software, and a large reference collection to ensure that every case is dealt with high precision. We offer all sorts of handwriting analysis and detection of forgery services.
Video Spectral Comparator-A Workstation for Questioned Document Examination
A video spectral comparator is an infrared video imaging system fitted with CCD camera, 400 to 1100 nm wide range of interchangeable camera filters, five light sources for incident infrared light, transmitted white and infrared light, and incident long-wave ultraviolet rays; 6 element filter wheel to select a narrow wavelength between 400 and 700 nm and a handheld infrared pen torch.
This instrument is designed for exposing forgeries and alterations in the documents by displaying differences in infrared absorption, infrared luminescence, visible luminescence, watermarks, and paper opacity.
Electrostatic Detection Apparatus (ESDA) -A Workstation to Develop Indented Writings and Impressions
Indented writings on questioned documents can be detected with a special electrostatic detection apparatus. This instrument creates an electrostatic images of indented writings, which are developed with charge-sensitive toners.
This device is more sensitive than an oblique light examination. The process in non-destructive and the results can be saved in the form of permanent transparencies.
Digital Microscope – MiScope®
The MiScope combines a digital movie camera, precision optics, and LED lighting in a device. This device is designed to view live images on the computer screen with special features:
High magnification and resolution for detailed analysis
Completely portable.
Real-time imaging for immediate observation.
Built-in markers, time stamps, and measurement features.
Built-in visible and IR illumination to perform a visual spectral comparison.
Stereo Microscope
The stereomicroscope provides:
Three-dimensional viewing for analyzing physical characteristics of documents.
Variable magnification for detailed examination.
Enhanced depth perception to detect alterations and inconsistencies.
The wide field of view and great depth of field makes it an ideal instrument for determining the chronological sequence of intersecting lines, comparing the inks and detecting the erasing and alterations etc.
Ultraviolet Light
An examination of a document under short and long ultraviolet rays can detect chemical erasures, alterations, substituted pages, and delicate stains due to artificial aging. UV rays are also useful in differentiating types of paper and sealing gums. This is a non-destructive technique.
Digital Imaging System
Worldwide Forensic Services is equipped with high-resolution flatbed scanners such as the Epson Perfection V700, Canon SLR digital camera with an additional macro lens, frame grabbers, digital microscopes (for recording photomicrographs), and forensic imaging software. Photo-quality color prints for demonstrative reports are produced using high-resolution laser and inkjet printers.
Miscellaneous Equipment
Dichroic, Infrared, Polarizer, and Color filters.
Ring light illuminator.
Starrett® Dial Indicator Micrometer for measuring the thickness of the paper.
Library
A professional library containing over 5000 research articles and books on forensic science is available to support our forensic investigations and keep our staff updated with the latest advancements in the field.