Assisted Fiber-optic & Electric Rotary Joints

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.

Notes:

• 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 holder for the Assisted Fiber-optic & Electric Rotary Joint is included (Holder_ARJ or Holder_AHRJ-OE_2x2).

• 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 variation2% (12-contact) | 3% (24-contact), peak to peak
Transmission75% (12-contact) | 80% (24-contact)
Input NAup to 0.5
Output NAup to 0.5
Number of contacts12 or 24
Contact materialGold
Contact resistanceLess 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 torqueLess than 20 µN·m
Rotation speedUp to 300 rpm (12-contact)|60 rpm (24-contact)
NoteTested with 200 µm core NA 0.22 fiber-optic patch cords

AHRJ_OE_12-DRAWING.pdf

Assisted Fiber-optic & Electric Rotary Joint, 12-contacts

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AHRJ-OE_MANUALV1.0.3.pdf

User Manual for Assisted Fiber-optic & Electric Rotary Joint

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