CUIJK, The Netherlands, August 19 /PRNewswire/ -- At the heart of the
increase in the density of data storage is the ability to produce small
lenses that operate at short wavelengths. These Solid-Immersion Lenses (SILs)
conform to tight tolerances on diameter, thickness, surface form and
roughness at a diameter of 1.0mm or smaller. Element Six announces the
development of a process that can obtain the required form accuracy in 1mm
Synthetic Single Crystal Diamond spheres. This new process has improved the
accuracy of the lenses by a factor 10 compared to earlier techniques.
Since the introduction of the compact disk in 1985, it has become the
standard storage medium for music, digital photography, computer data and
games. As the demand for disk capacity increases, future generations of
optical media will need significantly higher storage capacities. This trend
is seen in DVD and its successor the Blu-Ray disk. Diamond lenses are a
crucial component of the next generation of storage technology. Diamond
lenses will enable a storage capacity of up to 1TB (1000 Giga Bytes) per disc.
The increased disk capacity is achieved technically by reducing the
wavelengths of the readout laser and by increasing the numerical aperture
(NA) of the focusing lens. To achieve a high NA value a material with high
refractive index and transparency at the wavelength used is needed. Diamond
is the ultimate material for this application, with the largest known
refractive index of any transparent material in the blue and ultraviolet
region of the spectrum. Synthetic Diamond producing using Chemical Vapour
Deposition (CVD) has been optimized by Element Six in order to produce the
required defect free optical material.
"This Lens is an exciting breakthrough and Element Six are proud to be
participating in this new diamond technology that will enable mass storage of
data for business and consumer applications. This is another example of a
development of diamond processing technology on the nano-scale and proof of
the versatility of diamond and Element Six being at the forefront of
development", stated Christian Hultner the MD of Element Six.
About Element Six
Element Six is the world leader in the production of all forms of
synthetic diamond for industrial use. Element Six has pioneered the
development of CVD diamond technology since the 1980s, with a world-renowned
research centre at Ascot dedicated to this activity. CVD diamond opens up
many new application areas outside the traditional abrasive uses of synthetic
diamond. Uses of CVD diamond include laser exit windows, cutting tools,
surgical blades, windows for high-power gyrotrons, heat-spreaders for
electronic devices as well as active electronic devices.
SOURCE Element Six Ltd