The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 2013
Filed:
Nov. 15, 2007
Etsuko Nomoto, Sagamihara, JP;
Tsukuru Ohtoshi, Hanno, JP;
Masashi Kiguchi, Kawagoe, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A living body measuring instrument having a sub-mount on which plural light-emitting devices oscillating at different wavelengths are mounted in proximity, one optical output monitoring device that detects the optical outputs of these light-emitting devices and a light source mounted on the same heat sink which are housed in one can-package, a light-receiving device that detects a signal from a living body, and a circuit that separates the optical output signals from the light-emitting devices, wherein at least one light-emitting device has a light-emitting layer including a InGaAsPquantum well layer and a barrier layer on a GaAs substrate, the strain ε satisfies 0.4%≦ε≦1.4%, wherein y in the composition satisfies 0.10≦y≦0.45, and the wavelength of the emitted light is from 700 nm to 760 nm.