Hitoshi Morinaga

Title: Hitoshi Morinaga and Fiber-Optic Rotary Joint Innovations.

Introduction

Hitoshi Morinaga is an inventor associated with Takahagi, Japan, and Hitachi Cable, Inc. His work includes inventions for transmitting optical signals through rotary joints while addressing challenges related to multi-channel connections and polarization preservation. His record lists 2 patents.

Latest Patents

Morinaga’s listed patents focus on fiber-optic rotary joint technology.

- **Multi-port fiberoptic rotary joint.** This invention uses a rotating trapezoid prism, rhomboid prisms, and a speed-change gear mechanism to guide light between rotating and fixed components. The mechanism turns the trapezoid prism at half the angular velocity of the rotative member. Paired convergent lenses and optical fibers support the transmission of light across multiple channels.

- **Rotary joint for polarization plane maintaining optical fibers.** This design couples two polarization-maintaining optical fibers while preserving their polarization properties. It uses optical fiber collimators and a half-wave plate, with gears that rotate the plate at half the speed of the fiber connected to the rotary member.

Career Highlights

The two listed inventions address distinct technical requirements in optical communication: supporting multiple optical paths through a rotary connection and maintaining polarization alignment as connected fibers rotate. Together, they reflect Morinaga’s contributions to fiber-optic components designed for reliable signal transfer between moving and stationary parts.

Collaborations

Morinaga is associated with Hitachi Cable, Inc. His listed coworkers include Toshio Fukahori and Hiroshi Kajioka.

Conclusion

Hitoshi Morinaga’s patent work centers on practical solutions for fiber-optic rotary joints, including multi-port signal routing and polarization-preserving connections.