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Newsletter November 2022 | Menu of Newsletters
"Working at these micron and sub-micron levels, our necessity for vibration isolation became critical for our optical patterning systems."  
More customer comments...

- Lithium Battery Nano-Research Vibration Isolation (Legacy Article Aug2017)

- Featured Product: BM-10 Bench Top Vibration Isolation Platform

- Announcing the 2022 Minus K Technology Educational Giveaway to U.S. Colleges and Universities

- Neuronal Vibration Isolation - Learning & Memory Research | Univ of Texas

- Improving Nanoscale Vibration Isolation with Negative Stiffness

- Spectrometer Vibration Isolation -- Crystal Growth & Gamma Ray Spectrometers

- NASA's ICESat-2 Satellite relies on Minus K negative-stiffness vibration isolation in testing

- Cryogenic Vibration Isolation: Sunken Treasure Surrounding The Coldest Cubic Meter In The Universe

- Single-Atom Flakes & Quantum Electronics Vibration Isolation
- Eliminating Vibration Without Electricity or Compressed Air
- MInus K's Assist with the Building of the JWST Telescope?
-How much farther can JWST see than the Hubble?
-Why was it launched from near the equator?
-How cold does the JWST get in space?
-How did origami play into the trip?
-Why 24-karat gold on the mirrors?

- 300 leading universities and private and government laboratories
in 52 countries use Minus K technology


- Previous Newsletters
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Microscopy News (Legacy Article Aug2017)

Superionic Solid Electrolytes for Next-Generation Lithium Batteries: Negative-Stiffness Vibration Isolation Facilitates Nano-Research

   
Full article and larger images...

Advances in materials testing techniques have enabled scientists and engineers to measure mechanical properties, and observe and characterize mechanical phenomena that control deformation and failure down to nearly the atomic level. One field that is benefiting from such advances in testing techniques is energy storage. The option of creating higher energy capacity batteries has direct implications on performance with laptops, smartphones, and electric vehicles. Many of the rechargeable batteries used in these portable devices and vehicles are lithium-ion (Li-ion), composed of two electrodes, a positive electrode made of lithium and a negative electrode made of graphite, and a chemical electrolyte. The tremendous capacity of lithium and the metals ability to move lithium ions and electrons in and out of an electrode as it cycles through charge and discharge, make it a well suited anode material.

The electrolyte chemically contains the electric charge and also acts as the medium through which the current flows between electrodes when the battery is connected in a circuit. As the electrolyte in a Li-ion battery also contains a solution of lithium, the lithium electrode tends to react with this medium, causing dendrite fibers to form over the course of battery charge and discharge cycles, particularly when the battery is cycled at a fast rate. These fibers move out from the electrode and into the electrolyte, where they break down the controlled path that the electrons generally take by producing conductive paths haphazardly throughout the structure. This can result in a rapid discharge that allows excess current to flow, causing the battery to fail prematurely. It can also unsafely heat up the battery to a point where it can generate fire.

To realize significant improvements in energy density, vehicle range, cost requirements, and safety, the use of metallic lithium anodes will likely be required for powerful next-generation rechargeable battery chemistries like lithium-air and lithium-sulfur. However, the use of metallic lithium with liquid and polymer electrolytes is limited due to dendrite formation, and efforts to solve this problem have met with limited success.

Researching Pure Lithium and Superionic Solid-State Electrolytes
An alternative approach is being pursued at Michigan Technical Universitys Department of Materials Science and Engineering, Small-Scale Mechanical Testing Laboratory, in collaboration with Oak Ridge National Laboratory and the University of Michigan. The research focuses on a pure lithium anode accessed through, and protected by a superionic solid-state electrolyte that would prevent side reactions and enable safe, long-term, and high-rate cycling performance.

Our lab is focused on the mechanical characterization of small volumes of materials, said Erik G. Herbert PhD, Assistant Professor, Department of Materials Science and Engineering, Michigan Technical University. We are trying to understand how materials like metals, ceramics, polymers, composites, and biomaterials respond when their boundaries are mechanically loaded. We perform experiments relating to characteristics such as elasticity and hardness, to probe the properties of these materials.

The key risk and current limitation of Li-ion technology is the gradual loss of lithium over the cycle life of the battery, said Dr. Herbert. In particular, losses caused by physical isolation from roughening, dendrites or delamination processes, or to chemical isolation from side reactions. To abate these problems we endeavor towards a much deeper analysis of the degradation processes and a predictive understanding of the lithium-metal solid electrolyte interface as a function of cycling.

Specifically, we need to understand how the lithium is gradually consumed, why the interfaces are surprisingly resistive, how the electrolyte eventually fails, how defects in the lithium migrate, agglomerate or anneal with further cycling or time, continued Dr. Herbert. And additionally, whether softer electrolytes can be used without incursion of lithium dendrites, and what effects processing and fabrication have on the interface performance.

Among the efforts being pursued to answer these questions, state-of-the-art small-scale mechanical characterization techniques are being carried out at Michigan Technical University to provide the critical information that will directly enable transformative insights into the complex coupling between the microstructure, its defects and the mechanical behavior of both lithium and the solid-state electrolytes.

Nanoindentation Studies
In addition to an extensive array of optical and electron microscopes, atomic force microscopes and x-ray diffraction instruments accessible through the universitys Applied Chemical and Morphological Analysis Laboratory, the Small-Scale Mechanical Testing Laboratory operates a versatile suite of six small-scale mechanical testing platforms in which the user has direct control over the way the test is performed and how the raw data are recorded, reduced, and analyzed...

Full article...


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Applications     Microscopy    Micro-Hardness Testing     Optical & Laser Systems     Spacecraft Testing     Biology & Neuroscience     Microelectronics & MEMS     Analytical Balances     Audio/Turntables     Vacuum Isolation     What's the Right System     Large-Displacement     Heavy Systems     Our Technology     FAQs     Case Studies     Performance     Testimonials     Glossary     BM-10 Platform-Bench Top     BM-8 Platform-Bench Top     BM-6 Platform-Bench Top     BM-4 Platform-Bench Top     BM-1 Platform-Bench Top     BA-1 Platform-Bench Top     MK26 Table-Workstation     MK52 Optical Table     WS4 Table-Workstation     CM-1 Compact     CT-2 Ultra-Thin     LC-4 Ultra Compact     SM-1 Large Capacity FP-1 Floor Platform     Custom Systems     Manuals & Documents     Customers     Videos     Newsletters


Featured Product: BM-10 Bench Top Vibration Isolation Platform

  • Horizontal frequencies are weight dependent.
  • Horizontal frequency of 1.5 Hz is achieved at the upper limit of the payload range.
  • At the lower limits of the payload range the horizontal frequency is approximately 2.5 Hz.
  • Vertical frequency is tunable to 0.5 Hz throughout the payload range.

The BM-10 bench top platform offers 10-100 times better performance than a full size air table in a package only 4.6 inches tall and 12 inches wide and deep. It also does this without any air or electricity!

This vibration isolation platform is extremely easy to use and offers extreme performance. It offers a 1.5Hz horizontal natural frequency and our signature 0.5 Hz vertical natural frequency.

There are only two adjustments. The BM-10 is perfect for new generations of small SPM's that require the highest performance in a very compact system.

This is the thinnest, smallest footprint, most portable, and most user-friendly isolator ever offered that is capable of delivering this level of performance.They can also be made cleanroom and vacuum capatible.

Pricing & Specifications


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Announcing the 2020 Minus K Technology Educational Giveaway to U.S. Colleges and Universities

Minus K Technology, Inc. is giving away $25,000* worth of patented vibration isolators to colleges within the United States.

Your college could receive one of our superior performing negative-stiffness low-frequency vibration isolators, which use no air or electricity and are currently being used for biology, neuroscience, chemistry, crystal growing, physics, audio reproduction and many other fields.

If you have an Atomic Force Microscope (AFM), Electron Microscope, Interferometer, Laser Optical System, Micro Hardness Tester, or any other special equipment that would be assisted by our vibration isolation, simply complete the giveaway submission form and send it back to edgiveaway@minusk.com. If you're one of the top applicants, we'll send you one of these free vibration isolators to assist you with your research.

more...



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Neuronal Vibration Isolation
Learning & Memory Research | Univ of Texas

October 2018 Legacy Article: When built into inspection equipment, like a coordinate measuring machine, a laser interferometer system reports the surface condition of a product with more accuracy than any other method. Such a precision laser-position measurement system allows users to improve product quality and reliability, and increase manufacturing consistency and production yields.

High Resolution Microscopy Workstation Vibration Isolation
(High Resolution Microscopy Workstation, Mounted on a Minus K Vibration Isolation Platform)

Micro- and nano-level microscopy, whether used in academic laboratories or industry, is susceptible to vibrations from the environment, requiring these instruments to employ vibration isolation systems. When measuring a very few angstroms, nanometers, or microns of displacement, an absolutely stable surface must be maintained to support the instrument. Any vibrations that are transferred into the mechanical structure of the instrument will cause vertical and horizontal noise, compromising data sets and limiting the ability to measure high resolution features.

Traditionally, air tables have been the isolators used for microscopy equipment. The ubiquitous passive-system air tables, adequate up until a decade ago, are now being seriously challenged by the need for more refined imaging requirements. Air systems provide limited isolation vertically and very little isolation horizontally. Yet, high-resolution microscopy demands vibration isolation requirements that are unparalleled in both the vertical and horizontal axes. This has posed a significant challenge for many researchers.

CENTER FOR LEARNING AND MEMORY
Such was the case with the Center for Learning and Memory (CLM), part of the Department of Neuroscience at the University of Texas at Austin, a multi-disciplinary group studying the mechanisms governing the processes of learning and memory in animals.

Research in one of the CLM laboratories is primarily directed to understanding the cellular and molecular mechanisms of synaptic integration and long-term plasticity of neurons in the animal medial temporal lobe. The lab focuses attention on the hippocampus, subiculum, and prefrontal cortex areas of the brain that play important roles in learning and memory. These regions are also of interest because they have a low seizure threshold and are implicated in several forms of human epilepsy

Neurons are electrically excitable cells that process and transmit information through electrical and chemical signals in a process known as neurotransmission, also called synaptic transmission. The fundamental process that triggers the release of neurotransmitters is the action potential, a propagating electrical signal that is generated by exploiting the electrically excitable membrane of the neuron.

VIBRATION PROBLEM...
  Full article...


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Improving Nanoscale Vibration Isolation with Negative Stiffness
Resolutions continue to bridge from micro to nano...

November 2010 Legacy Article: Minus K Technology's compact, high-capacity, low-frequency negative-stiffness isolator is designed to support heavy payloads while reducing low-frequency vibrations. The LC-4 isolator comes in several capacity ranges to match vibration-sensitive instruments for weight loads from 1 to 130 lbs. The LC-4 comes in two versions (low-frequency horizontal and ultra-low-frequency horizontal). Both versions can deliver a vertical natural frequency of 0.5 Hz or less, which can be achieved over the entire load range. Horizontal natural frequency is load dependent. The low-frequency version has a 1.5-Hz natural frequency, while the ultra-low-frequency version can achieve 0.5 Hz or less near the nominal loads.



The need for precise vibration isolation with scanning probe microscopy (SPM) and nearfield scanning optical microscopy (NSOM) systems is becoming more critical as resolutions continue to bridge from micro to nano. Whether used in academic labs or commercial facilities, SPM and NSOM systems are extremely susceptible to vibrations from the environment.

When measuring a very few angstroms or nanometers of displacement, an absolutely stable surface must be established for the instrument. Any vibration coupled into the mechanical structure of the instrument will cause vertical and/or horizontal noise and bring about a reduction in the ability to measure high-resolution features. The vertical axis is the most sensitive parameter for SPMs, but these instruments can also be quite sensitive to vibrations in the horizontal axis.

Lab design teams obviously need to plan for these special equipment requirements, as they make decisions regarding building-level isolation techniques and localized techniques. Traditionally, bungee cords and high-performance air tables have been the vibration isolators most used for SPM and NSOM work. The ubiquitous passive-system air tables, adequate until a decade ago, are now being challenged by the more refined imaging requirements. Bench-top air systems provide limited isolation vertically and very little isolation horizontally.

Also at a disadvantage are active isolation systems, known as electronic force cancellation, which use electronics to sense motion and then implement equal amounts of motion electronically to compensate and cancel out the motion. Active systems are somewhat adequate for applications with lasers and optics, since they can start isolating as low as 0.7 Hz. But because they run on electricity, they can be negatively influenced by problems of electronic dysfunction and power modulations, which can interrupt scanning.

Lately, the introduction of integrated microscopy systems employing multiple scopes is enabling more complex optical measurements, but these systems are also much heavier, and there has been little vibration-isolation technology available for such heavy instrumentation. Air tables, which have been liberally used for optics applications, are not ideal for these nano-scale resolution systems because of their inability to effectively isolate vibrations below 20 Hz. Nor can active systems be used with these newer combination systems because of their inability to handle heavy instrumentation.

Negative-stiffness mechanism (NSM) vibration isolation offers a viable alternative choice for SPM and NSOM systems. This includes applications using atomic force microscopy (AFM) integrated with micro-Raman spectroscopy, where negative-stiffness vibration isolation is particularly well-adapted. In fact, it is the application of negative-stiffness isolation that has enabled AFMs to be truly integrated with micro-Raman. Negative-stiffness isolators can handle the weight of a combined system, as well as isolating the equipment from low-frequency vibrations: a critical set of factors that high-performance air tables and active systems cannot achieve. The neuronal sample is derived from slices of rat neocortex.

Full article...



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Negative-Stiffness Vibration Isolation Aids Quantum Electronic Research
Single-Atom Flakes & Quantum Electronics Vibration Isolation

Better understanding the character and properties of graphene, and similar two-dimensional materials, will advance their integration into improvements for semiconductors, electronics, photovoltaics, battery energy storage and many other applications.

One university laboratory that has been conducting research with graphene and other atomically-thin materials for some years is the Henriksen Research Group at Washington University in St. Louis, Missouri.

Our experiments entail the careful measurement of the electronic properties of thinly-layered materials, including both electronic transport and thermodynamic quantities, such as the magnetization and compressibility of electron gas, says Professor Erik Henriksen Ph.D., leading professor of the Henriksen Research Group. We also conduct measurements of the infrared absorption spectrum to probe the electronic structure directly.

The group searches for unusual and unexpected properties of low-dimensional materials, utilizing a combination of electronic, optical and thermodynamic measurement approaches to understand the novel quantum electronic phases that arise. The experiments are generally conducted at very low temperatures, fractions of a degree Kelvin above absolute zero, and in high magnetic fields, employing custom devices made of graphene or related crystals.

Single-Atom Flakes
We look at the physics of the layered graphene, where the layers are weakly bound, so they can be pulled apart, explains Henriksen. We isolate these very thin layers down to a single atom. Then, lift the graphene flakes from bulk graphite with adhesive tape, transferring them very carefully onto silicon wafers.

Full article...


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Eliminating Vibration Without Electricity or Compressed Air
“Air supply and control and electrical connections aren’t needed. It’s also low weight and compact, making it easy to fit into the smaller footprint of our Sequel System.”

In its continuing efforts to revolutionize discovery-based research into complex biological systems, Pacific Biosciences has released its next generation of automated, long-read genomic sequencer with single molecule, real-time (SMRT) sequencing technology – the Sequel System.

In its continuing efforts to revolutionize discovery-based research into complex biological systems, Pacific Biosciences has released its next generation of automated, long-read genomic sequencer with single molecule, real-time (SMRT) sequencing technology – the Sequel System.

The Sequel System is very multifaceted in operation, says Kevin Lin, mechanical engineer at Pacific Biosciences. It encompasses robotics, chemical and biological processing, and photonics. Because its intended to be used in diverse settings within research and laboratory environments, excessive ambient vibrations could negatively influence the data sets. So, we needed to implement a vibration isolation component that not only isolated the sensitive components from vibrations, but also was sufficiently small, compact, and integrative.

Internal and external factors can create vibration issues from buildings housing the system including heating and ventilation systems, fans, pumps, elevators, adjacent road traffic, nearby construction, loud noise from aircraft, and weather conditions. These influences cause vibrations as low as 2Hz that can create strong disturbances in sensitive equipment.

With our earlier sequencer model, we used air tables for vibration isolation, which, for the most part, performed adequately, Lin says. But use of the Sequel System in more diverse locations, where low-frequency vibrations may be present to a greater or lesser degree, necessitated a vibration isolator that was compact enough to fit into our much smaller Sequel System and could effectively cancel out these low-frequency vibrations.

Negative-stiffness vibration isolation
Pacific Biosciences ultimately decided on negative-stiffness isolation to address their needs. Developed by Minus K Technology, negative-stiffness isolators use completely passive mechanical technology for low-frequency vibration isolation without using motors, pumps, or chambers, making them zero maintenance. Because of their very high vibration isolation efficiencies, particularly in the low frequencies, negative-stiffness vibration isolation systems enable vibration- sensitive instruments, such as the Sequel System, to operate in severe low-vibration environments that wouldnt be practical with top-performance air tables and other vibration-mitigation technologies...

Full article...


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MInus K's Assist with the Building of the JWST Telescope

All of the JWST systems-level cryogenic vacuum tests were performed at the NASA Johnson Space Center’s (JSC) Chamber-A. It is now the largest high-vacuum, cryogenic-optical test chamber in the world, and made famous for testing the space capsules for NASA's Apollo mission, with and without the mission crew. It is 55 feet (16.8 meters) in diameter by 90 feet (27.4 meters) tall. The door weighs 40 tons and is opened and closed hydraulically. The air in the chamber weighs 25 tons, when all the air is removed the mass left inside will be the equivalent of half of a staple.


Diagram of the Cyrogenic Chamber in which the JWST was tested for space.

For three years, NASA JSC engineers built and remodeled the chambers interior for the temperature needed to test the James Webb Space Telescope. Chamber A was retrofitted with the helium shroud, inboard of the existing liquid-nitrogen shroud and is capable of dropping the chambers temperature farther down than ever, which is 11 degrees above absolute zero (11 Kelvin, -439.9 Fahrenheit or -262.1 Celsius).

A key addition to Chamber A was the addition of a set of six custom Minus K negative-stiffness vibration isolators. The Minus K passive isolators do not require air and offer better isolation than air and active isolation systems. A major factor in the selection of the of the vibration isolators was that they not only isolate vibration vertically, but also horizontally at less than 1 Hz.

JWST was designed to work in space where the disturbances are highly controlled and only come from the spacecraft, while on Earth with all the ground-based disturbances, such as the pumps and motors, and even traffic driving by can affect the testing. The Minus K vibration isolators provided dynamic isolation from external vibration sources to create a near flight-like disturbance environment.

The isolators utilize Minus K's patented Thermal Responsive Element (TRE) compensator device, a passive mechanical device, requiring no air or electricity just like the isolators. The TRE compensator adjusted the isolators as the temperature changes throughout the testing at JSC, keeping the JWST in the proper position.

The Critical Design Review for Spacecraft-to-Optical Telescope Element vibration isolation system was completed one month earlier than scheduled at the end of 2011. The six Minus K negative-stiffness vibration isolators were installed on top of Johnson Space Centers Thermal Vacuum Chamber A in March 2014.

JWST needed a support structure inside the vacuum chamber to hold equipment for the testing. Engineers installed a massive steel platform suspended from the six vibration isolators via steel rods about 60 feet long (18.2 meters) each and about 1.5 inches (or 38.1 mm) in diameter, to hold the telescope and key pieces of test equipment. The sophisticated optical telescope test equipment included an interferometer, auto-collimating flat mirrors, and a system of photogrammetry precision surveying cameras in precise relative alignment inside the chamber while isolated from any sources of vibration, such as the flow of nitrogen and helium inside the shroud plumbing and the rhythmic pulsing of vacuum pumps.

Minus K's Involvement continued...

-How much farther can JWST see than the Hubble?
-Why was it launched from near the equator?
-How cold does the JWST get in space?
-How did origami play into the trip?
-Why 24-karat gold on the mirrors?

Full article...

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Our 29th Anniversary is on 2/1/22
See the Milestones & Timeline 1993-2022


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Press Release:
New Ultra-Thin CT-2 Low-Frequency Vibration Isolation Platform Adapts
to Space Constraints in Critical Micro- and Nano-Microscopy

(replaces the CT-1)

Full release...


Previous Features:

Our 29th Anniversary was on 2/1/22
See the Milestones & Timeline 1993-2022

Accurate Research into Microscale Friction

What are negative-stiffness vibration isolators? Horizontal & Vertical Isolation.

Nanolithography Patterning Scanning Probe Vibration Isolation

The DÖHMANN AUDIO Helix One & Helix Two Turntables Integrate the Advanced Technology of
Negative-Stiffness Vibration Isolation

Nanotech Vibration Isolation
Stable Microscopy Key to Nano Research

Hybrid Compound Microscope | Imaging Vibration Isolation

Portable AFM | Negative Stiffness Vibration Isolation Supports New Compact,
Portable, User-Friendly ezAFM+

Neubrescope Vibration Isolation & Fiber Optic Vibration Sensing

BioOptics Vibration Isolation | A Tool for Brain Discovery

Neubrescope Vibration Isolation &
Fiber Optic Vibration Sensing

Neubrescope Vibration Isolation &
Fiber Optic Vibration Sensing

SAT's remarkable XD1 record-player system.
The Best Table Ever?

Atomic Force Microscope Sees More Through Vibration Isolation

Negative-Stiffness vs. Active Vibration Isolation for Critical Nano-Precision Applications

Perfect 10 Audio & Turntable Vibration Isolation?

3D Surface Analysis Vibration Isolation

Charting New Depths for Understanding Friction in Micromachines

Optical Photopatterning & Photovoltaic Performance Vibration Isolation

Cleanroom Vibration Isolation:
Negative Stiffness vs Pneumatic Systems

Ultra-Low Vibration Lab
at University of Michigan
Facilitates Nanoengineering Discoveries

Portable Atom Interferometry Negative-Stiffness Vibration Isolation

Vibration Criterion (VC) Curves-Lab Analysis

Heavy Payload Systems Vibration Isolation


Press Release: CT-2 Successor to the
Award Winning Utlra-Thin CT-1 Vibration Isolator

Bad Vibrations: How to Keep the Effects of Environmental Bounce Out of Your Data

Vibration Isolation & Certifying Bowling Ball Surface Roughness

Press Release: Laser Focus World Innovator Award for
Ultra-Thin, Low-Height CT-1

How They Work>>Negative-Stiffness Vibration Isolators

Microscopy Vibration Isolation

FAQs>>Frequently Asked Questions About Vibration Isolation

Custom Vibration Isolation Systems

Audio Reproduction & Turntable Vibration Isolation

Vibration Isolator Steadies Optics for NASA Telescopes + Vacuum Isolation

Optical-Laser Vibration Isolation + video

Optical-Laser Vibration Isolation + video

Cryostat Vibration Isolation

Nanoindentation & Micro Hardness Testing
Vibration Isolation

Ultra-Low Frequency Vibration Isolation Stabilizes Scanning Tunneling Microscopy

Neuronal Research into Animal Learning, Memory Neuronal Research,
Vibration Isolation Problem & Solution

Sunken Treasure Surrounding The Coldest Cubic Meter In The Universe
Supported by Minus K Vibration Isolators

Lithium Batteries: Superionic Solid Electrolytes for Next-Generation

Spacecraft Vibration Isolation On the Ground

Behavior of a Single Molecule-UCLA's California NanoSystems Institute

Cleanroom Precision Vibration Isolation

Negative-stiffness vibration isolation is utilized to provide ultra-stability for multi-disciplined, nano-level research at UCLA's California NanoSystems Institute.

NASA/JWST Update: Custom James Webb Space Telescope Vibration Isolators Working Well

Audiophile Interests: The Doehmann Helix 1 Turntable

Minus K Technology Educational Giveaway to U.S. Colleges and Universities

Articles In The News


 

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NASA Telescope Project

How Our Isolators Work


Spacecraft Vibration Isolation On the Ground




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