Questioned documents
Alterations, overwriting and ink sequencing checks in forensics labs and insurance investigations.
Inks that look identical under white light separate cleanly under infrared. The DM020IR puts 8 IR LEDs and a sensitive CMOS sensor into a USB stick-style instrument — a practical tool for document examination, trace evidence and conservation work.
Different inks absorb and reflect infrared differently — which is why an alteration invisible to the eye can be obvious in an IR capture. The DM020IR surrounds the sample with even IR illumination while the sensor handles the spectrum natively, no filters to swap and no darkroom ritual.
Because it is USB bus-powered, it moves between desks, evidence rooms and conservation benches without an external supply. Examiners typically run it alongside a standard visible-light scope — the DM020IR answers "what changed", the visible unit documents "what is there".
| Model | UB-DM020IR |
| Light source | 8× infrared LEDs |
| Image sensor | 2 megapixel CMOS (IR-sensitive) |
| Magnification | Real 10×–200× |
| Connection | USB 2.0, bus-powered |
| Supported systems | Windows · macOS · UVC standard device |
| Typical use | Forensics, questioned documents, trace evidence, conservation |
| Certification | CE / FCC / RoHS |
| Customisation | OEM / ODM — logo, packaging, firmware, bespoke wavelengths by project |
| Warranty | 1 year |
Alterations, overwriting and ink sequencing checks in forensics labs and insurance investigations.
Fibres, residues and particulates that lose contrast under visible illumination.
Under-drawing, pentimenti and earlier paint layers on manuscripts, paintings and artefacts.
The sensor responds to visible light as well, but the IR LED array dominates illumination. For paired visible/IR workflows, most labs combine the DM020IR with a standard model like the DM050U — or ask us about a dual-illumination build for volume programmes.
LED wavelength selection is a firmware-and-BOM configuration we handle for volume projects. Describe the examination problem and we will confirm what is achievable before quoting.
The instrument produces calibrated image files with timestamps; admissibility depends on your jurisdiction's procedures and examiner testimony. We supply the documentation labs need for their validation files.
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