Cambridge Technology has been manufacturing ultra-lightweight coated beryllium mirrors for over 50 years. These mirrors, which are integrated into laser beam steering assemblies, are used in various applications from PCB drilling to laser eye surgery.

The Challenge

The exacting nature of the mirrors manufactured by Cambridge Technology require laser interferometry to measure the surface form of almost every precision beryllium mirror it produces. The company also depends on laser interferometry at various stages in the production lifecycle for a clear understanding of performance characteristics.

The company’s original laser interferometry solution was deficient in two key areas. First, it was prone to environmental vibrations, and second, measurement data was stored as individual text files (or text reports) which meant that it was extremely difficult to analyze.

Each unique mirror in the Cambridge Technology range required a different application which, in turn, required specific configuration of the laser interferometer.

To overcome these deficiencies, the company required a metrology solution that would promote process automation. They also needed a solution that would relieve manual workload while minimizing sensitivity to environmental vibration.


Clean, sustainable, and renewable energy is a hot topic. Our world runs on energy and our production and use of energy shouldn’t put us or future generations in harm’s way. Society has responded to increasing power demands with technology such as nuclear fission. Fission splits uranium into smaller elements and releases large amounts of energy used to heat water in nuclear reactors and ultimately produce electricity.   

Alternatively, there are renewable energy sources such as solar energy, wind power, tidal power, and even geothermal heat. So, where does fusion fit in? Fusion is what energizes our sun. Fusion is the fusing or combining of two or more smaller atoms into a larger one. Fusion has a nearly unlimited fuel supply (hydrogen from water) and has minimal by-products.  And if containment is lost in a fusion plant, the fusion reaction simply stops. However, these benefits are countered by the difficulty in harnessing fusion.

Science and Manufacturing Step Up

This is where the scientific community and high tech manufacturing firms are stepping up and advancing fusion. Take, for example, the Lawrence Livermore National Laboratory (LLNL) in California, United States. Recently inside its National Ignition Facility (NIF) they generated more than 10 quadrillion watts of fusion power for a fraction of a second. This is roughly 700 times the generating capacity of the entire US electrical grid. Their goal is to produce more energy than it consumes in a sustainable fusion reaction.

In attempting to achieve nuclear fusion, NIF houses an array of optics and mirrors that amplify and split a pulse of photons into 192 ultraviolet laser beams — focusing them on a hydrogen target smaller than a pencil eraser. When the beams hit the small target, it creates temperatures and pressures seen only in stars and thermonuclear bombs. Initial results at NIF from this year indicate that the fusion reactions generated a record 70% of the power that went into the experiment and is getting closer to achieving ignition. These outcomes show a promising future for fusion power.