An Optical Bench is often call an Optical Table, this is a simple, low cost but very useful student optical bench with scale that permits experiments in reflection, refraction, lenses and the creation of images.
Ideal for basic work in optics relating to images, dispersion, focal lengths, mirrors etc.
Overall length 1200 mm long with an adjustable metric scale.
Uses a Light Box from LIGHT BOX & OPTICAL SET kit as light source.
Optical Bench parts include convex and concave lenses, targets, large prism, prism table, various photographic slides, a white screen and sliding supports for components
An optical table is a vibration control platform that is used to support systems used for laser- and optics-related experiments, engineering and manufacturing. The surfaces of these tables are designed to be very rigid with minimum deflection so that the alignment of optical elements remains stable over time. Many optical systems require that vibration of optical elements be kept small.
As a result, optical tables are typically very heavy and incorporate vibration isolation and damping features in their structure. Many use pneumatic isolators that act as mechanical low-pass filters, reducing the ability of vibrations in the floor to cause vibrations in the tabletop.
The surface of an optical table is typically stainless steel with a rectangular grid of tapped holes in either metric or imperial units:
metric: M6 on a 25 mm grid
imperial: ¼-20″ UNC on a 1″ (25.4 mm) grid
Optical breadboards, benches, and rails are simpler structures that perform a similar function to optical tables. These are used in teaching and in research and development, and are also sometimes used to support permanently aligned optical systems in finished devices such as lasers.
In optical systems, especially those involving interferometry, the alignment of each component must be extremely accurate—precise down to a fraction of a wavelength—usually a few hundred nanometers. Even small vibrations or strain in the table on which the elements are set up might lead to complete failure of an experiment. Hence, one requires an extremely rigid table which neither moves nor flexes, even under changing loads or vibrations. The surface of the table must also be quite flat, to allow precision optical mounts to make good contact with the table without rocking and facilitate easy assembly of the optical system.
Materials and construction.
Earlier optical table tops were sometimes made of a large slab of highly polished granite or diabase. These materials are very dense and stiff, which inhibits flexing and motion of the surface, improving the stability of the optical system. The surfaces can be ground extremely flat, which is beneficial for alignment of optical systems. Such tables were very heavy and expensive, however, and did not do a good job of damping vibrations.
Mounting components to a granite surface is also difficult. Granite and diabase are still used for smaller precision-flat surfaces, but optical tables made from these materials are not commonly available today.
Modern optical tables are typically made of top and bottom sheets of steel…(Click here for Full Wikipedia info link)
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