ForensiScan – Automatic Scanner for Forensic Traces

Photographic scanner for non-contact documentation of forensic evidence on cylindrical or highly curved evidence items and/or transparent or highly reflective objects

ForensiScan – Intended Use

Calibrated evidence scanner for the photographic capture of forensically relevant evidence on any surface in a fully automated scanning process.

 

ForensiScan System Components

ForensiScan Base Unit

  • Sturdy, torsion-resistant frame (110 x 70 x 70 cm)
  • Precision rotary table with zero backlash; resolution: 72,000 steps/full circle
  • Aluminum rotary table; diameter: 300 mm; color: matte black; centering aid via concentric markings
  • Centring clamping device (3-jaw chuck with marked jaws)
  • Centring bearing in the axis of the turntable; centring mandrel with interchangeable pressure pieces; height locking with toggle screws
  • 3 pressure pieces for centring mandrel (centring tip, rubberized pressure plate d = 10 mm, rubberized pressure plate d = 50 mm)
  • High-resolution RGB camera (Model 2020), roll angle and tilt adjustable (zero position marked)
  • Multidimensional precision guidance of the camera with fine adjustment of camera position and camera direction
  • Camera focal plane precisely selectable via fine adjustment
  • Motorized lens, focal length 45 mm
  • Narrow camera portal with a clear width of 350 mm
  • Control electronics with Gigabit Ethernet interface and power supply
  • Separate emergency stop switch
  • Control software with hardware control (rotary table and camera), live view, focus peaking, image magnification, crosshairs, aperture adjustment, contrast auto-focus, image composition during the scanning process, fast scan with reduced resolution, automatic image correction for accurate dimensional relationships
  • Image output in JPG, TIF, or PSB format

ForensiScan Lighting Units: OLED Line Lights, mounted on the ForensiScan

Digital measurement of camera distance and asserated diameter via built-in glass measuring rod and digital caliper

Protective measures against DNA contamination

Test specimen, cylindrical, for quality control

Desktop computer, compatible with the ForensiScan, including monitor, keyboard, and mouse

Protective cover

 

Optional Additions:

Expansion of the camera’s spectral range for near-infrared imaging

Linear unit

  • Travel distance: 40 cm
  • A modular extension for the ForensiScan
  • Resolution: 0.005 mm
  • L-shaped evidence holder with mounting slots

Test specimen, planar, for quality control of the linear unit

 

ForensiScan – Use Cases

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Dimensions

110 x 78 x 80 cm

Weight

approx. 20 kg

Maximum Resolution (vertical x horizontal)

Rotational motion: 4.096 x 72.000 Px (294 MPx)
Linear motion: 4.096 x 80.000 Px (326 MPx)

Camera and Lens

RGB Camera
Resolution: 4,096 x 3,000 px RGB
F = 45 mm
Lens mount: MFT interchangeable lens
Distance from rotation axis: 0 mm – 500 mm
Höhe über Drehteller: max. 450 mm
Bildwinkel vertikal: 15,8° (Rollwinkel justierbar)

Rotary Table

Internal angular reference
Maximum object size: 500 mm x 500 mm
Angular resolution: 0.005°
Load capacity: 20 kg

Turntable

Surface: Aluminum, black
Diameter: 300 mm
With concentric centering circles
With black plastic attachment (“puck”)

3-Jaw Chuck

Color: black
Object diameter: 0 mm – 120 mm

8-Jaw Chuck

Color: black
Object diameter: 0 mm – 400 mm
For evidence items of any shape

Centering Aid

Universal centering mandrel with various pressure pads
Height-adjustable
Variable contact pressure

Linear Unit

Internal position referencing
Mounting with quick-change adapter
Resolution: 0.005 mm
Maximum stroke: 40 cm


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