Researchers from the Langevin Institute in Paris have developed a novel internal fingerprint sensor that captures detailed images beneath the skin’s surface. This innovative approach offers enhanced accuracy and security for biometric identification, addressing limitations of traditional fingerprint sensors.

How It Works

The new sensor utilizes full-field optical coherence tomography (FF-OCT), an advanced imaging technique originally used in medical applications. Unlike conventional methods, FF-OCT can directly capture a 2D image of the fingerprint from its internal structures. This process involves two steps:

  1. Taking an angled image to determine the depth of the internal fingerprint.
  2. Capturing a direct image of the fingerprint itself.

This method simplifies data processing and reduces costs, making it more accessible than previous technologies. The sensor also employs a high full-well capacity CMOS image sensor (CSI2100) from Adimec, which ensures precise imaging even in challenging conditions.

Technical Specifications

  • Imaging Technology: FF-OCT
  • Sensor Model: CSI2100
  • Full Well Capacity: Over 2 million electrons per pixel
  • Resolution: Up to 720 fps at 1440×1440 pixels
  • Applications: Ideal for real-time optical metrology systems and inline inspection tools

Broader Applications

Adimec, the company behind this technology, is also exploring its use in advanced imaging applications such as cancer assessment, interferometric microscopy, and bright scene imaging. The compact design of the camera eliminates the need for forced cooling, offering greater flexibility for integration into various devices.

For OEMs interested in high full-well capacity imaging solutions, Adimec can be contacted at [email protected] or through regional business offices.

Last Updated: 2025-09-04 21:28:11