Forensic Comparison Microscope With Document Examination System
Document Examination System A18.1816
A18.1816 Questioned Document Examination Analyzer is an ideal tool to inspect, observe and compare many kinds
of objects, evidences including:
-- All kind of questioned documents: Used of different kinds of
writing instruments, by adding, altering, conceal, forgery and
other methods of fade contract, IOUs, real estate contracts,
invoices, bills of exchange, checks, bills of lading, passports and
so on.
-- Various fluorescent encryption securities: checks, stocks,
credit cards, stamps and special trademarks
-- Identify cards, resident identify cards, temporary residence
permits, etc.
-- Currency: US Dollars, H.K. Dollars, RMB, etc. A18.1816 Questioned Document Examination Analyzer | Light Source System | Main Light Source : 1x 24V/150W Halogen Lamp, with cooling fan,
focusing lens, and heat-resistance glass cover | UVC: short-wave ultraviolet light 254nm, 1x10W | UVA: long-wave ultraviolet light 365nm, 1x10W | Upper visible side light: 1x50W, with lamp holder which can adjust
position and angle freely, used to check indentation | Transmitted white light 2x20W | Excitation Wavelength:
000nm,365nm,450nm,465nm,515nm,530nm,565nm,580nm,900nm | Receiving Filter:
000nm,415nm,450nm,565nm,700nm,720nm,740nm,800nm,900nm | Video Camera System | High sensitive, high resolution 1/3” CCD color digital camera, 650
lines, sensitivity 0.001 Lux, especially sensitive to Near-infrared
and visible spectral bands light source. | Electrical zoom lens, aperture 1.2, zoom ranges 1~30x | Function | Fluorescent light source with multi excitation and receiving filter
combinations, can exam and compare the different inks used on
documents | Reflect light and receiving filter combination, can exam the
reflection and absorption of different wavelengths on different
inks. | Reflect light and receiving filter combination, can exam the
transmission of different wavelength infrared light on the
different inks. | Transmit light and receiving filter combination, can exam the
transmission of different wavelength infrared light on the
different inks | Reflect side light can exam the scratch, cut marks on documents. | Transmit light can illuminate from the bottom side to exam the
scratch, cut marks on documents. | Samples to choose light source according to different objects. | Objects | Light Source | Excitation | Receiving | Exam | Distinguish altered or added text by different kinds of ink | Excitation | 485-550 nm | 700-900 nm | Alter | Natural subside text on thermal paper, carbon paper | Excitation | 480-550 nm | 700-740 nm | Subside | Phosphor fingerprint | Excitation | 480-550 nm | 700-740 nm | Fluorescent | Multilayer indentation | Reflected Light _ Side | 000nm | 900nm | Indentation | Text on the black cloth | Reflected Light _ Side | 000nm | 900nm | Covered Text | Text in the Kraftpaper envelopes | Transmitted Light _ UV | 000nm | 900nm | Transmit | Correction Fluid | Transmitted Light _ UV | 000nm | 900nm | Alter | Security Trademark | UVC | 000nm | 000nm | Real/False | Currency Fluorescent | UVA | 000nm | 000nm | Fluorescent |
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