However, in a recent study published in Optics Express, researchers at the University of Adelaide in Australia described a new instrument they created that uses lasers to measure the contents of gas. Their instrument — a "laserlyzer," if you will — takes a "molecular fingerprint" of a cloud of gas and analyzes it for a range of different diseases, including cancer, diabetes, and infections. Since each molecule absorbs light at a different frequency, the laser system shoots light at a million different frequencies to spot their presence as well as their concentrations. This laser breathalyzer could be used to give an extensive health screening quickly and non-invasively. A commercial product may be available within the next three to five years.