Nobuo Nishida

Title: Nobuo Nishida: Innovations in Holographic Memory and Recording

Introduction

Nobuo Nishida is an inventor associated with Tokyo, Japan. His work includes holographic technologies for storing and recording visual information. He is credited with 2 patents and has been associated with Nippon Electric Co., Ltd. and Nippon Telegraph and Telephone Public Corporation.

Latest Patents

Nishida’s patent, “Large Holographic Memory with Plural Overlapping Detector Arrays,” describes a holographic memory system divided into sections containing arrays of mini-holograms. Each section has an associated photodiode array that detects information when a coherent light beam interrogates a mini-hologram. The detected outputs are combined and directed to memory output terminals, supporting efficient retrieval from large holographic storage plates.

His patent, “Multiple Recording System for Video Signals and Optical Images,” presents a multiplexed holographic recording method. It uses transparent positive pictures with distinct, pre-assigned spatial frequencies to encode different images. Spatial frequency filters remove components assigned to other pictures, reducing crosstalk and enabling the reconstructed image to reproduce the smoothed intensity distribution of the combined pictures.

Career Highlights

Nishida’s listed company affiliations include Nippon Electric Co., Ltd. and Nippon Telegraph and Telephone Public Corporation. His patents reflect work on optical information storage and techniques for recording multiple images within a holographic system.

Collaborations

Nishida’s listed coworkers include Itsuo Matsubara and Masahiro Moriwaki.

Conclusion

Nobuo Nishida’s patent work addresses two complementary challenges in holography: retrieving information from large memory arrays and recording multiple visual signals while limiting interference.