As a powerful special transmission signal slip ring, since its invention, optical fiber slip ring has been widely accepted by the market with its unique advantages. In addition to optical equipment, many mechatronics devices have also begun to be equipped with optical fiber slip rings or optoelectronics. One integrated slip ring. Unlike conductive slip rings that transmit power or weak electrical signals, optical fiber slip rings transmit laser signals, so their internal structure is no longer a friction pair system like conductive slip rings, but precision optical components.
Fiber optic slip rings
Thanks to the frictionless structure, the optical fiber slip ring can have a long service life. Taking the single-channel optical fiber slip ring developed by Jingpei Electronics as an example, its design service life generally exceeds 100 million revolutions. In addition, the frictionless structure design of the optical fiber slip ring also brings an advantage, that is, there is no need to consider the internal wear problem when designing. After selecting a bearing that supports a sufficiently high speed, it does not need to make major structural changes to customize the speed to reach Products with 10000rpm or above.
Because there are two types of optical fiber, single-mode optical (core diameter is generally 9 or 10μm) and multi-mode optical(core diameter is mainly 50um and 62.5um), optical fiber slip rings are also divided into single-mode and multi-mode. The diameter of optical fiber is larger than that of single-mode fiber. Therefore, whether it is a single-channel or multi-channel product, the development of multi-mode fiber products is much less difficult than single-mode products. Of course, single-channel optical fiber slip rings are less difficult to develop than multi-channel products. many.
Therefore, most domestic slip ring optical fiber manufacturers have the ability to develop single-channel optical fiber slip rings. As the leader of domestic private slip ring manufacturers, Jingpei Electronics has now mastered the ability to develop multimode optical fiber slip rings with less than 12 channels. It has the relatively mature technology development capability of 4~6 channel single-mode optical fiber slip ring.
The main reason why the multi-channel single-mode fiber slip ring is difficult is that its core diameter is small and its internal optical components are very precise. As we all know, the optical components used in the multi-channel optical fiber slip ring include Fresnel lens, mirror group, Dove prism, etc. These optical components are responsible for the optical coupling of the optical fiber slip ring. If the position of these components is deviated during assembly, it will cause excessive insertion loss, which will make the product fail to meet the design requirements and cannot leave the factory.
In addition, the core diameter of the single-mode fiber is too small, resulting in a very high sensitivity to the insertion loss. To control the insertion loss of the multi-channel single-mode fiber slip ring within a qualified range, it requires quite sophisticated equipment and very skilled Technical personnel, and this has become one of the obstacles in the manufacturing process of multi-channel single-mode optical fiber slip ring. In addition, the multi-channel optical fiber slip ring has a fatal disadvantage, that is, its internal optical components are difficult to maintain normal technical performance in a strong vibration environment, and the adaptability of the vibration environment is suitable for fiber optic slip rings in military and other industries. It is especially important.
