The Assisted Fiber-optic & Electric Rotary Joint is electrically driven as it senses and follows the tethered animal’s rotations. It detects the torsion of the optical cable during the animal movements and releases it with a very high sensitivity.
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The Assisted Fiber-optic & Electric Rotary Joint is electrically driven as it senses and follows the tethered animal’s rotations. It detects the torsion of the optical cable during animal movement and releases it with a very high sensitivity. The assistance of this rotary joint helps to counter the frictional force of the internal slip-ring and offers quality transmission of electrical signal during any experiment with freely-moving small animals like mice. It comes with 12 or 24 electrical channels and one optical channel.
• The 12-channel Assisted Fiber-optic & Electric Rotary Joints can be designed with two types of lenses. The 24-channel Assisted Fiber-optic & Electric Rotary Joints uses the aspheric (AH) lenses exclusively.
– The achromatized doublets (AD) allow a near-equal focal distance for wavelengths between 450 nm and 650 nm, minimizing chromatic aberration. The AD models are designed for use with a 200 µm core, 0.22 NA optical fiber.
– The 0.50 NA aspheric (AH) is optimized for reduced optical aberration. It is designed for use at a wavelength of 470 nm.
• The output fiber-optic patch cords are also included.
• An optional adapter kit can be provided to allow a Harwin-connectorized rotary joint to be used with an Omnetics-connectorized systems (ADAPTER_HO12).
Contact us to discuss the possibility of custom wavelengths and NA.
|Maximum variation||2% (12-contact) | 3% (24-contact), peak to peak|
|Transmission||75% (12-contact) | 80% (24-contact)|
|Input NA||up to 0.5|
|Output NA||up to 0.5|
|Number of contacts||12 or 24|
|Contact resistance||Less than 500 mΩ (12-contact) | Less than 100 mΩ(24-contact)|
|Resistance variation during rotation (constant rotation)||Less than 100 mΩ|Less than 25 mΩ , at 5 VDC|
|Start up torque||Less than 20 µN·m|
|Rotation speed||Up to 300 rpm (12-contact)|60 rpm (24-contact)|
|Note||Tested with 200 µm core NA 0.22 fiber-optic patch cords|
The simplest form of the patch cord is a piece of fiber with buffer coating and two ferrules on its ends. So far, the most popular fiber in optogenetics research is a fiber with a 200 µm core diameter and NA 0.22. Ideal for laser. #.#: Fiber length (m)
The simplest form of the patch cord is a piece of fiber with buffer coating and two ferrules on its ends. Ideal for LED. #.#: Fiber length (m)
This adapter kit allows a Harwin-connectorized rotary joint (12 channels) to be used with an Omnetics-connectorized systems (12 channels).