MRO Technology

Compact Imaging’s MRO (Multiple Reference OCT) technology is a new form of time-domain optical coherence tomography (OCT). OCT, which has been widely adopted in clinical health care settings, is similar to ultrasound but, instead of sound, it uses light to scan 1 – 2 mm below the surface of tissue (or any translucent material) and detect its light scattering properties. MRO makes available the safe and powerful scanning capabilities of conventional OCT but in a simple, miniature design for use in mobile or remote applications.

At the core of the MRO architecture is a reference mirror mounted on a low-cost actuator, such as a voice coil. When paired with a partial mirror, the combination enables MRO to generate multiple reference signals simultaneously that interfere with light back-scattered from various depths within the target. These result in continuous depth scans that can be processed into images and measurements of the target’s features, properties and behaviors.

MRO Technology

Light Source

Superluminescent diode (SLD) at wavelength chosen to optimize penetration.

Beam Splitter

Directs the light into the target and to the reference mirror.

Voice Coil

Moves reference mirror small distance to generate up to 3,000 depth scans/second.


Reference and partial mirrors interact to simultaneously form multiple scan segments.


Detects composite interference signals for signal processing and analysis.

Why MRO is Better


With MRO, you’ll be able to help lead the world into a new age where highly secure, dynamic biometrics can be obtained by non-invasive means that are convenient, accurate and affordable.

Like conventional OCT, MRO uses light to scan tissue features, properties and behaviors below the surface. Designed to generate as many as 3,000 depth scans (or, A-scans) per second from a single module, MRO can generate rich data sets up to 1 to 2 mm into in any translucent target.


Unlike X-rays and CT-scans, MRO technology does not require the use of harmful electromagnetic waves or ionic contrast. MRO enables creation of safe sensing products that provide meaningful tissue images and biometric information, such as sub-dermal fingerprints and blood flow, by non-radioactive means.

By leveraging components found in common high-volume consumer devices, MRO will dramatically reduce the cost of producing a subsurface optical scanning device, enabling you to bring the sophisticated imaging and measurement capabilities of OCT to mass business and consumer market opportunities.


MRO’s simple, robust architecture and small footprint will bring the powerful sensing capabilities of much larger clinical diagnostic machines to the new realms of mobile and remote applications and devices, where size, simplicity and durability are at a premium.

MRO’s operating power requirements are consistent with integrating MRO sensors into many remote and mobile application-specific devices, which often depend on battery-powered operation.