Vibration Isolation - Optical Table

DVIO series(high performance optical tables from DAEIL) are specially designed for laser-optical experiments. High-quality steel honeycomb optical tables exhibit the optimal combination of high rigidity, low weight, good modal response and vibration damping. The pneumatic isolators used for supporting optical tables provide excellent vibration isolation in both vertical and horizontal directions. DAEIL's optical tables will fully satisfy the customer's needs for any sophisticated laser-optical experiments. [Optical tables are available in a choice of two types of table supports; DVIO-I type(pneumatic isolators) and DVIO-R type(rigid supports)] * DVIO-I Isolator TypeThe high performance pneumatic isolators are used for supporting an optical top in order to perform any precision optical experiments. * DVIO-R Rigid TypeThe economical rigid support, utilized of vibration isolating rubbers, are used for harmonizing with an optical top when the vibration level is not highly crucial. - Features* High quality steel honeycomb table topsA perfect plane board for optical experiments is utilized with a honeycomb snadwich panel structure, which has the excellent rigidity and relatively light weight considering the mass. An array of mount holes on the magnetic attachable stainless top easily provides a researcher to secure optical components onto it. * Any directional vibration isolationThe conventional pneumatic isolators have lower vibration isolation efficiency in horizontal direction than vertical in general. But DAEIL's new isolators provide an excellent isolation in all directions by the special designed horizontal vibration removal mechanism and the isolator's natural frequency is relatively low. * High dampingAn ideal vibration isolation system should provide both best vibration isolation and high damping. DAEIL's pneumatic isolator utilizes damping techniques, and reduces the amplification at the natural frequency and prevents the system from rocking in response to transient disturbances. * Self-levelling topThe constant height is maintained and controlled by an air regulator valves, actuated by table motion. This system also provides self-levelling of the table top when loads are moved across the work surface or sudden load change occurs. 1. Optical Tops * High-quality steel honeycomb optical tops: The high-quality steel honeycomb optical tops that consist of a steel honeycomb core laminated with steel top and bottom skins provide high stiffness with respect to low weight. The steel honeycomb core is sandwiched between two faces of skin materials (laminated with steel bottom and ferromagnetic stainless steel top skins) and finished with side panels. * Working surface: The top skins are stretcher-leveled and pressure bonded to achieve excellent top flatness and lightly sanded with an orbital pattern to remove burrs and provide non-glare & non-reflecting finish. * Honeycomb core: Honeycomb core is made of 0.3mm thick steel, plated to prevent corrosion, closed-cell structure with basic cell side of 3.2cm2, giving core density of 3x10-4kg/cm2 * Bonding: The bonding process is critical to long term performande. The honeycomb core, skins and side walls are rigidly and permanently bonded with specially formulated high strength adhesive, which has no viscoelastic creep and hysteresis. * Sealed mounting holes: Standard mounting holes on the top are lead-Screw tapped (either M6-1.0 on a 25mm grid or 1/4-20 on the inch grid) and slightly countersunk to remove ridges and burrs. Sealed mounting holes in register with open cells in the honeycomb core assures that all mounting screws can be inserted to full depth. Spills of water, solvents or hazardous chemicals can be readily cleaned up, and small objects into a hole can be retrieved. * How to select top thickness: In general, top thickness is proportional to static rigidity and dynamic natural frequency, it does not affect compliance directly. A top length to thickness ratio of 10:1 is a safe rule for most general applications, but in case of very sensitive optical experiments at severe environments, it might be 7:1. Small 50mm thick optical tops should be supported on uniform flat surfaces, not post mounts. But 100mm thick tops may be supported on post mounts. Construction : Honeycomb core sandwiched structure Core: Plated steel honeycomb (0.25m foil, 3.2cm2 cell size) Top Skin : 2.0mm thickness carbon steel plate with damped wood composite, vinyl covered finish Bottom Skin : 4.0mm thickness carbon steel plate epoxy painted finish Surface Flatness : 0.1mm over 600mm square Mounting HolesMetric: M6-1.0 holes on 25mm grid, 37.5mm bordersEnglish: 1/4-20 holes on 1" grid, 1.5" borders Hole/Core Sealing : Easy clean cylinderical cup (25mm deep) Damping : Broadband standard damping Compliance Level, Resonant Frquency, Static Deflection 2. Pneumatic Isolation Supports The Pneumatic Isolation Support use pneumatic isolator named air spring as a isolator to remove delicate low frequency vibration from floor which seriously affects precision optical experiments. * Pneumatic IsolatorPneumatic Isolators consist of an elastomer diaphragm supported on a rigid cylinder of air, air spring chamber, reservoir tanks, etc. The best pneumatic isolators designed and made by DAEIL provide the durability and the excellent vibration isolation performance. The natural frequency of isolator is very low(1~2Hz). The reinforced thin-wall rolling diaphragms are only 0.7mm thick. * DampingOur pneumatic isolator has a special orifice the function of which air flow is restrictions between air chamber and reservoir tanks. As the result, it reduces the amplification at lower resonant frequency and achieves high damping for gross transient disturbances, such as sudden load changes or bumping the table top. * Auto Levelling systemAir-operated system with three finger adjustable height control valves maintains the absolute level of top plate automatically. * Complete System & Self-standing Post SystemThe complete welded construction with four swiwel casters are enables to change layout and transport easily. Self-standing posts are convenient for supporting large coupled table systems and provide the maximum flexibility in post positioning with respect to the optical top. Vibration Isolation: Air Spring Isolations Natural Frequency of System: Vertical: 1.2~1.5hz, Horizontal: 1.5~1.7hz Damping: Air Damping by Orifice Levelling: Auto Levelling by 3 Automatic Levelling Valves Levelling Repeatability : ±0.3mm Load Capacity: 400kg~5,000kg Air Supply: 5~7kg/cm2 Compressed Air or Nitrogen Gas 3. Rigid SupportsThe rigid supports with elastomer mounts are economically used for less serious vibration problem. * Ordering chart is attached. * For more information, please visit our website.