Show Daily - January 2012
Minus K's Negative
Stiffness Vibration Isolators: The Choice For Laser/Optical
Negative-Stiffness vibration isolation from Minus
K® Technology, Inc. enables laser/optical instruments
such as SPMs, micro-hardness testers and optical profilers
to achieve performance that cannot be achieved with
other passive and electronic isolation systems.
Laser and optical systems, whether used in academic
labs or industry, are very susceptible to vibrations
from the environment and these instruments frequently
need vibration isolation. When measuring a very few
angstroms or nanometers of displacement, an absolutely
stable surface has to be maintained upon which to
rest the instrument. Any vibration will cause noise
and fundamentally an inability to measure high resolution
Improved Transmissibility: What Negative-Stiffness
isolators provide is really quite unique to the field
of laser and optical systems. They not only isolate
vibrations vertically but also horizontally at less
than 1 Hz, and without the need for air or electric
Negative-Stiffness isolators employ a completely mechanical
concept in low-frequency vibration isolation. They are constructed
primarily with springs and flexures without the need for
any fluids or electric power. The result is a compact passive
isolator capable of very low vertical and horizontal natural
frequencies and very high internal structural frequencies.
The isolators (adjusted to 1/2 Hz) achieve 93 percent isolation
efficiency at 2 Hz; 99 percent at 5 Hz; and 99.7 percent
at 10 Hz. A Minus K customer with a Negative-Stiffness system
for crystal growing when asked how the new isolators were
performing, stated "Before we got the NSM system, I
could actually see somebody walking downstairs through the
walls with a seismometer.
With the Negative-Stiffness system in place, I can't even
tell when they are shelling at the nearby Fort Riley military
The all-metal Negative-Stiffness systems can be configured
to be compatible with high vacuums and other adverse environments,
such as extreme high and low temperatures, and radiation.
With vacuums, for example, the isolators can be used right
inside the vacuum chambers. This offers other advantages
such as much lower payload weights, more compact systems,
and eliminates problems associated with vacuum chamber feedthrough.
Negative-Stiffness vibration isolation systems have become
a growing choice for laser and optical applications. Not
only is it a highly workable vibration solution, but its
cost is significantly less?up to one-third the price compared
to active and traditional passive systems? making it an
economical solution to cost-conscious administrators.
Minus K has recently announced its new MK52 Optical table
for large applications including Raman spectroscopy, AFMRaman
integration and optical laser testing systems. The MK52
tables come with a choice of accessories and table tops.
Minus K Technology works with many instrument manufacturers
and academic laboratories designing custom vibration isolation
systems, and has sold standard bench top and table vibration
isolation products to over 300 universities and laboratories
in 40 countries.
The company was founded in 1993 to develop, manufacture
and market state-of-the-art vibration isolation products
based on its patented Negative-Stiffness technology. For
more information, contact Steve Varma, Operations Manager,
Minus K Technology, Inc.; 310-348-9656; email firstname.lastname@example.org.
Or visit www.minusk.com.
version of this article