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High-performance Vibration Isolation Systems with Steel Honeycomb Top / OSDVIO-I series

Our optical tables are designed for challenging applications that are susceptible to vibrations like optical experiments, spectroscopy, interferometry, holography, microscopy, nanopositioning, ultrafast research, etc. The lightweight but incredibly rigid steel honeycomb table top is combined with uniquely designed pneumatic vibration isolators, efficiently reducing vibration.

Part Number

OSDVIO-I

Details

Static Rigidity
Static rigidity defines the ability of an optical table top to minimize deflections and relative motion between components when a static load is placed on the table top. Therefore, the higher static rigidity contributes to maintain the precise and better alignment of the elements, as a result, the system performance will not be disturbed.
Dynamic Rigidity
Dynamic rigidity defines the ability of an optical table top to resist deflection in response to external forces such as floor vibration, acoustic noise and mechanical sources on the surface of the optical table top. The optical table top with the higher dynamic rigidity damps the structural resonance due to the floor vibrations passed through pneumatic isolators.
Vibration Isolation
Pneumatic isolators of the optical table reduce the floor vibration before it is transmitted to the table top surface. When the forced frequency vibration is lower than the natural frequency of the isolators, vibration is transmitted directly to the table top. When the forced frequency vibration coincides with natural frequency of the isolators, vibration is amplified. Thus, it is critical to design the isolators with the lower natural frequency.
Damping is another essential factor when designing pneumatic isolators. Damping decreases the amplitude of vibration caused by resonance, improving the system stability and providing the fast settling time.
Dual Chamber Design
The pneumatic vibration consists of two chambers that are uniquely designed to lower its resonant frequency for the better vibration isolation performance in the low-frequency range and increase damping efficiency. The size of an air chamber is optimized and sealed with a ultra-soft rolling diaphragm and a piston, softening the stiffness to further improve the vertical vibration isolation performance. A gimbal support of the pneumatic isolator as a mechanical filter system acts as a gimbal to minimize friction and reduce horizontal displacements.

Superior Damping
The second chamber is a damping chamber which is linked to the air chamber through a orifice. As the air chamber creates the restoring force, the air flows into the damping chamber, and the orifice dissipates the energy in the air, damping the system. As the piston moves up and down, air is forced to move through the orifice, producing a damping force on the payload. This type of damping is strong for large displacements of the piston and less for small displacements. This allows for fast settling time of the payload, without compromising on small amplitude vibration isolation performance. The orifice installed between the air chamber and the damping chamber quickly restricts the movement of the optical table top or the external force applied to the optical table top.

Automatic Leveling
The high-performance leveling valves automatically relevel an optical table top, offering a wide range of leveling valves options, starting from the standard leveling valves with leveling repeatability of ±1.0 mm to the precision leveling valves with leveling repeatability of ±0.05 mm. If the settling time, leveling accuracy and leveling repeatability are required to meet equipment specifications, then the precision leveling valves should be selected.

Applications

– Microscopy
– Spectroscopy
– Interferometry
– Nanopositioning
– Ultrafast Research
– Holography

Table Specifications
Length	Range from 1,000mm to 3,600mm
Width	Range from 1,000mm to 1,500mm
Thickness	Range from 200mm to 400mm
Support Specifications
Isolation System	Pneumatic Isolation
Resonant Frequency	Vertical/Horizontal = 1.2 - 3.0Hz
Vibration Isolation at 10Hz	Vertical/Horizontal = 80 - 99%
Accuracy of Leveling Repeatability	±1.0 mm for Standard Leveling Valve ±0.05 mm for Precision Leveling Valve
Maximum Load Capacity	3000kg
Automatic Leveling	Yes
Height Adjustment	±20 mm
Required Air Supply	3 - 5kg/cm² nitrogen or compressed air