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Multichannel Optical Rotary Joint
№5 Department of Physics and Optoelectronics technical bases
V.N. Shapar
Multichannel optical rotary joint is intended for the non-contact transfer of the analog and digital signals from the rotating objects to the stationary and is the optical analog of the electric current-collecting device.
1- rotating part; 2- stationary part; |
Designed for the non-contacting transferring broadband digital signals to and from rotating body.
Compensation of the optical beams rotating is the basic principle of given connector.
APPLICATION OF THE CONNECTOR INCLUDE:
▪ wide angle azimuth field of view scanning systems in visible and IR
▪ radar antenna equipment
▪ different optical communication system for the sensor data signals coupling between members free to rotate with respect to each other
SPECIFICATION
number of optical channels * up to 20
insertion optical loss ** 3-10 dB
crosstalk less then - 60dB
channel bandwidth at less 300 Mb/s
optical signal amplitude modulation with rotating process less then 15%
rotational speed up to 200/s
temperature range -50 C0 to +80 C0
diameter 130 mm
overall length 180 mm
* dictated by the user
** insertion loss is influenced by the type of light sources, detectors and fiber optic link
FEATURES
▪ low signal losses
▪ easily and effectively screened from electrical noise and interference
▪ possibility of combining digital optical channel with analog or VHF channels at the expence of free region presence
▪ relatively easy-to-produce transformer
▪ compact
The design and size of connector frame is influenced by its application within a network and by environmental factors.