Cadre's 3D Scan Acquisition Technology

Shiny surfaces, such as metal, pose a challenge to traditional 3D surface topography measurement. The shiny specularity of the metal surface causes unwanted reflections and non-linearities that are difficult for traditional methods to interpret. This issue results in drop-out pixels and blurred surface features.

In partnership with GelSight Inc. (an MIT spin-off located in Massachusetts), Cadre solved this imaging problem for firearm forensics through the use of a proprietary gel-pad. The pad (see below) includes an elastomeric sensor with embedded pigment layer. The gel temporarily deforms to the shape of any object pressed into its surface. By conforming to micron-scale surface features the process removes surface specularities from any material (including metal). The result is a higher resolution surface than is possible without the use of the gel pad. The gel difference is best seen when considering striated toolmarks such as aperture shear.

• Gel-Pad Removes Surface Specularities
  
• Higher-Resolution Surface Measurements
• Faster 3D Surface Measurements
• Patented American-Based Technology

Firearm and toolmark examination is your main focus and it's ours as well!

Gel-Pad Removes Unwanted Surface Effects

Cadre has partnered with GelSight Inc to use a patented GelPad technology to reduce unwanted surface reflectance effects. This results in a higher-resolution scan than would be possible without the gel.

  Scan Acquisition

A sequence of images, each illuminated from a different direction provides the raw input to the 3D surface measurement algorithms.