Optical tables should exhibit an optimum on static rigidity simultaneously with sound damping
characteristics. But in general it is not possible to optimise both properties at the same time. An
increased stiffness will result in low damping and vice versa. For the functionality of an optical table
static rigidity is of inferior significance since negative effects can always be compensated for by
alignment of the optical setup. Much more disturbing interference arises from increased resonance in
the upper frequency range which can only be eliminated by appropriate self-damping. The recognition
of this circumstance has caused OPTA to choose a different way in building optical tables.
OPTA tables are optimised in view of their self-damping characteristic by which resonance in the upper
frequency ranges are suppressed nearly completely for tables of type HD/T.
| Type | Description |
| HD | Main Core: Steel Honeycomb Top Plate: Magnetic stainless steel, without mounting holes |
| HDT | Main Core: Steel Honeycomb Top Plate: Magnetic stainless steel, with mounting holes |
| HS | Main Core: Mineral Filling Material with High Stiffness and Density Top Plate: Magnetic stainless steel, without mounting holes |
| HST | Main Core: Mineral Filling Material with High Stiffness and Density Top Plate: Magnetic stainless steel, with mounting holes |
Top Plate
Bottom Plate
Main Core
Sealed Mounting Holes
Sides
Tabletop Thickness
Support systems can be ordered as freestanding isolators or tie bar connected. The table support itself is offered in three different version and the legs can be equipped with different footings.
Rigid Table Support
Type LMT
(Levelling Mount Table)
The table top is fixed to the support system. Levelling screws which have a resonant frequency above 10Hz are installed between table legs and table feet to compensate for unevenness in the laboratory floor.
Vibration Isolated Table Top
Type RMT
(Rubber Mount Table)
Reinforced elastomeric shock absorbers make the connection between table top and support system. The resonant frequency of these systems lie between 2,5 and 5 Hz.
Vibration Isolated Table Top
Type DMT
(Diaphragm Mount Table)
In this case the table support system uses the legs as air cambers. The tabletop rests upon club-shaped diaphragm mounts.
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