This inventor holds 9 USPTO granted patents. Top assignees: Hamamatsu Photonics Kabushiki Kaisha, Hamamatsu-Photonics K.k.. Active years: 1987-2005.
Location History:
- Shizuoka, JP (1989 - 1992)
- Hamamatsu, JP (1987 - 2005)
Company Filing History:
5 out of 134 
4 out of 3,132 
Years Active: 1987-2005
Title: Koichiro Oba: Innovator in Optical Measurement Technology
Introduction
Koichiro Oba is a prominent inventor based in Hamamatsu, Japan. He has made significant contributions to the field of optical measurement technology, holding a total of 9 patents. His work has advanced the capabilities of optical measurement apparatuses, making them more efficient and effective.
Latest Patents
One of his latest patents is an optical measurement apparatus and method for optical measurement. This invention includes a liquid scintillation counter that serves as an optical measurement apparatus. It features components such as an HPD (High-Performance Detector) charge amplifier, a voltage amplifier, a comparator, a counter, a multi-channel analyzer, and a display. The HPD has a photocathode and an APD (Avalanche Photodiode) for outputting a signal that corresponds to the number of incident photons. The comparator outputs a logic pulse signal, serving as a comparison result signal, only when the signal outputted from the HPD and amplified by the charge amplifier and voltage amplifier is larger than a prescribed threshold value. This threshold value is set larger than an output signal that is outputted when a single photoelectron is emitted from the photocathode and smaller than another output signal that is outputted when two or more photoelectrons are emitted.
Another notable patent is an optical measurement apparatus that primarily includes a photon detection unit for detecting incident photons, a time signal output unit for outputting a time signal, and a storage unit for storing the time signal outputted from the time signal output unit when the photon detection unit detects photons. The photon detection unit includes a HPD having a photocathode and an APD, a TZ amplifier, a peak holding circuit, and an A/D converter. The time signal output unit includes a timer and a counter, while the storage unit includes a comparator and a memory. When photons impinge on the HPD, a trigger signal is outputted from the comparator, causing the photon-number outputted from the A/D converter and the time data outputted from the counter to be stored in the memory.
Career Highlights
Throughout his career, Koichiro Oba has worked with notable companies, including Hamamatsu Photonics and Hamamatsu-Photonics K.K. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking innovations in optical measurement technology