Mitsutoshi Kamakura

Title: Mitsutoshi Kamakura: Optical Device Inspection and Lens-Mounting Innovations.

Introduction

Mitsutoshi Kamakura is an inventor associated with Osaka, Japan, and Sumitomo Electric Industries, Limited. His patent work includes methods for inspecting optoelectronic devices and mounting lenses on light-emitting diodes. He is credited with 6 patents.

Latest Patents

One of Kamakura’s patents describes a temperature characteristic inspection device for optical communication LEDs, laser diodes, and photodiodes. The method enables testing across a broad temperature range, from −40°C to +85°C. For low-temperature testing, a device chip is placed on a cooled inspection stage inside a shield casing. Cool, dry air helps prevent moisture from forming on the chip while probes apply electrical input and the device’s emission or detection characteristics are examined.

Another patent presents a method for mounting a lens on a rear-surface-emitting LED. A camera measures the light distribution from the device to locate the center of its emitting region. A movable stage then positions the chip for dispensing ultraviolet-curable resin and placing a lens. Ultraviolet light hardens the resin, securing the lens in alignment with the emitting region.

Career Highlights

Kamakura’s disclosed inventions address practical manufacturing and testing challenges in optoelectronics. His work combines temperature-controlled inspection, optical measurement, precision positioning, and lens attachment for light-emitting devices.

Collaborations

Kamakura is associated with Sumitomo Electric Industries, Limited. His listed coworkers include Hisao Go and Osamu Akita.

Conclusion

Mitsutoshi Kamakura’s patent work focuses on improving the inspection and assembly of optical communication components, including LEDs, laser diodes, and photodiodes.