Diamond Analysis with the Use of Lumenera’s Imaging Spectrophotometer

GemEx, a key player in diamond analyses, has established the concept of scientifically quantifying the Light Performance of diamonds. The global leader in diamond Brilliance, Fire and Sparkle certification, GemEx uses the BrillianceScope Analyzer, an imaging spectrophotometer that enables capturing an image of a diamond from six different lighting angles. Over 200 BrillianceScope imaging spectrophotometers are installed all across the globe and more than 2 million diamonds have been analyzed and sold with GemEx Light Performance Reports.

Role of BrillianceScope in Diamond Analysis

The images captured by the BrillianceScope are assessed by the level of bright color light (Fire) and bright white light (Brilliance) that is returned to the eye. The device also examines the changes in these lights with respect to the movement of the diamond to measure scintillation (Sparkle). The measurements obtained are then compared with thousands of other diamonds to identify the rank and performance. The obtained results are then consolidated in the GemEx Light Performance Report. The Diamond Light Performance Certificate is depicted in Figure 1.

Diamond Light Performance Certificate.

Figure 1. Diamond Light Performance Certificate.

BrillianceScope instruments are deployed in diamond cutting facilities throughout the globe. The procedure involves scanning of the diamonds at first, followed by data transfer to GemEx through the Internet. GemEx validates the reliability of the scan, verifying for cleanness, calibration, correct operation, etc., and then generates a report that is supplied along with the diamond when it is sold to the consumer.

Lumenera's Solution to GemEx

GemEx needed a camera with fast frame rates and a user-friendly interface in the BrillianceScope imaging spectrophotometer. It chose Lumenera's Lu130 industrial camera (Figure 2) with a USB 2.0 digital interface. The monochrome camera is placed behind a lens and an imaging band-pass filter. After capturing multiple images at multiple wavelengths, they have been reconstructed into color images.

GemEx uses Lumenera’s Lu130 camera for analyzing diamonds.

Figure 2. GemEx uses Lumenera’s Lu130 camera for analyzing diamonds.

The BrillianceScope is employed in a variety of lighting environments. Hence, a small form factor camera with high sensitivity is required to capture quality images in challenging conditions. The 1.4MP Lu130 has delivered outstanding performance in all BrillianceScope installations. Before Lumenera's Lu130 camera, GemEx employed a digital camera that needed a card interface to establish a connection with the computer.

With this interface becoming outdated, GemEx opted for the universally accepted USB interface. If GemEx did not opt for the USB interface, it would have been forced to develop custom computers at a higher cost with limited capabilities.

The selection of Lumenera's USB 2.0 multi-megapixel cameras enables easy integration of the GemEx into BrillianceScope and to get benefits from reliable, rapid, cost-effective and low-noise cameras. The report provided by GemEx comprises the images taken by Lumenera's camera together with bar graphs. This enables consumers to compare their diamonds to all others in the world.


Lumenera's Lu130 camera delivered GemEx with the ease of integration and outstanding camera performance required for the BrillianceScope to perform successful analysis of diamond brilliance, fire and sparkle. In addition, valuable technical and sales support provided by Lumenera has maintained GemEx' satisfaction and continued business.

Download the Brochure for More Information

This information has been sourced, reviewed and adapted from materials provided by Lumenera Corporation.

For more information on this source, please visit Lumenera Corporation.


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