Papillon Systems

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PAPILLON BS Surface Scanner
 

PAPILLON BS surface scanner provides high-resolution imaging of surfaces of all specimens submitted to ARSENAL – bullets and cartridge case fired from rifled and smoothbore weapons, shots and pellets, deformed bullets and fragmented shells with relief deformation of up to 7 mm.

Owing to the versatility of PAPILLON’s scanner, data acquisition stations in ARSENAL ABIS are not divided to those used for collecting only bullet data and those for cartridge cases. One ARSENAL station equipped with PAPILLON BS allows experts to submit to ABIS all types of objects – bullets, cartridge cases, shells and fragments – in any sequence.

The other side of the scanner’s versatility is its capacity to operate not only under laboratory conditions but in the field as well. Its compactness and transportability has made it possible to create a mobile ARSENAL that is a full-featured ABIS with an internal database.

The scanner's capability to capture images of non-ballistic objects that may also have unique surface markings left, for example, by a burglar’s tool or fingers, is an added bonus available for forensic examiners. The diameter of cylindrical objects to be scanned may range from 1 mm to 22 mm.


The process of setting up and centering a specimen takes only a few seconds, facilitated by simple and robust labor-saving attachments:
  • magnetic, plasticine- and adhesive-coated stands for bullets/cases and deformed specimens of any length and material
  • centering collets
  • cartridge case holder for scanning an object’s base
  • holder for projectiles (shots/pellets) fired from smoothbore guns
  • semiautomatic dial-type holder for continuous scanning of headstamps of ten cartridge cases.

ARSENAL provides 360-degree circumference imaging of bullets and cartridge cases and imaging of cartridge cases’ full headstamps as well as selective imaging of specific regions on deformed and fragmented specimens, on shotgun projectiles that bear unique ballistic signatures.

The open stage on which objects are placed allows the firearm examiner to scan any exhibits, even severely deformed as well as those of a great length (e.g. shotgun cases), and to control visually the scanning process.

Orientation-independent positioning of a cartridge case makes the image acquisition process easier. Besides, it is not imperative to set up the cartridge case its base to be strictly parallel to the lens plane – the setting error is compensated by the software algorithm and has no impact on the image quality.


Centering a bullet with the collet
to prepare for scanning its side surface


Positioning a cartridge case to scan
its headstamp


Semi-automatic dial-type holder
for continuous scanning

Images are captured with a linear CCD sensor over the entire scanning window (20 mm x 20 mm) in much the same way as flatbed scanners do this. The seamless image of the entire surface is generated in the process of scanning, which makes a valuable advantage this method provides versus fragmentary techniques where the final image is a result of “pasting together“ separate fragments with elimination of inevitable borderline defects and compensation for light differences on neighboring areas with significant differentials in relief altitudes.

The outcome of each scanning session presents exact digital copies of an object’s surface:

  • 2D grayscale image (65,536 gray shades) with the resolution of 3 μm/pixel
  • 3D image of the surface, with the resolution of 10 μm/pixel on all axes.

The declared resolution in any place of any surface, including distorted and those with salient relief, is ensured by the “layer-by-layer” scanning technology applied with the small depth of focus along the entire profile of an object’s deformation. Every next layer is scanned with the optical system automatically shifted.

The scanner allows diverse modes of lighting in which objects can be scanned:

  • bullets’ and cartridge cases’ sides, shell fragments and deformed bullets are scanned in oblique lighting
  • cartridge cases’ full headstamps are scanned in:
    • direct annular lighting
    • 45°-sectored lighting at various angles.

Both automatic focusing and calculation of requisite light intensity exclude the overexposure when capturing images, thereby avoiding loss of information.

The scanner works equally fine with all specimens though made of different material compositions – the reflecting and diffusing properties of material are considered when calculating the light intensity.

The PAPILLON ballistic scanner is utterly user-friendly and fail-safe and it requires just the simplest computer skills from the operator.

PAPILLON BS Surface Scanner Features:

CCD-sensor 7500 elements
Maximum scanning depth 7 mm
Field of vision 20 Θ 20 mm
Resolving capacity (2D) 3 microns
Resolving capacity (3D) 10 microns
Caliber of bullets/cartridge cases 1 to 22 mm
Bullet/case side scanning time 1.5 minutes

Cartridge case head scanning time:
      1 images captured in annular light
      1image captured in annular light and 8 images in sectored light

 
1 minute
10 minutes

Measurement accuracy of land width 0.015 mm
Measurement accuracy of rifling pitch 0.15Ο
Power supply 15V (DC)
Power consumption 70 Watt
Dimensions 400 Θ 228 Θ 217 mm
Weight 10.3 kg
Interface PCIe

 

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