Biological information measuring apparatus

Details Biological information measuring apparatus Biological information measuring apparatus

2008-10-21

2009-08-04

Porta, David P (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

C250S339010, C250S343000

Reexamination Certificate

active

07569821

ABSTRACT:
A light emission section spread-spectrum modulates a base band signal at a chip frequency f to thereby generate a primary modulated signal, modulates the primary modulated signal at a frequency 2f to thereby generate a secondary modulated signal, and emits a near-infrared light beam having a specific wavelength into a living organism on the basis of the secondary modulated signal. A light detection section receives a reflected light beam from the interior of the living organism in an effective detection band 2f, converts it to an electrical detection signal, and converts the detection signal to a digital signal at a sampling frequency 4f. The light detection section then demodulates the digital signal at the frequency 2f to thereby generate a primary demodulated signal, and demodulates the primary demodulated signal through spectrum despreading to thereby generate a secondary demodulated signal. Thus, a biological information signal representing biological information is output.

REFERENCES:
patent: 2005/0249667 (2005-11-01), Tuszynski et al.
patent: 2006/0222224 (2006-10-01), Ohashi
patent: 3623734 (2004-12-01), None
patent: 4097522 (2008-03-01), None
patent: 02/32317 (2002-04-01), None

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