Biological optical measuring instrument
First Claim
1. A biological optical measuring instrument comprising a light generating unit which irradiates light having a predetermined wavelength to a subject, a light detecting unit which detects light which is irradiated from the light generating unit and is transmitted through the subject and a signal processing unit which analyzes optical signals detected by the light detecting unit and prepares biological information including blood stream in the subject, wherein the signal processing unit includes means for detecting noise components contained in the detected optical signals and means for removing an optical signal portion containing the detected noise components from the optical signals.
2 Assignments
0 Petitions
Accused Products
Abstract
In a biological optical measuring instrument, when displaying a biological variation in a predetermined region of a subject through irradiating light to the subject and processing light signals obtained by detecting the transmitting light, the light signals of a plurality of sections having a predetermined time interval are extracted, section data are prepared from the respective extracted light signals, the plurality of the prepared section data are added and averaged, prior to preparing averaged section data for the predetermined time interval a light signal section containing noise components is specified from differential values of the extracted light signals and the section data of the light signal containing the noise components is excluded from the averaging operation, thereby, a biological optical measuring instrument is provided which permits to remove the section data containing noise components are automatically removed through computation without relying upon visual observation, to obtain highly reliable measurement result quickly and to display the same.
12 Citations
10 Claims
- 1. A biological optical measuring instrument comprising a light generating unit which irradiates light having a predetermined wavelength to a subject, a light detecting unit which detects light which is irradiated from the light generating unit and is transmitted through the subject and a signal processing unit which analyzes optical signals detected by the light detecting unit and prepares biological information including blood stream in the subject, wherein the signal processing unit includes means for detecting noise components contained in the detected optical signals and means for removing an optical signal portion containing the detected noise components from the optical signals.
-
7. A biological optical measuring method comprising:
-
a first step of irradiating light having a predetermined wavelength to a subject from a first position of the subject and measuring the transmitting light at a second position of the subject as transmitting light signal data containing biological information in a plurality of times for a predetermined interval; and
a second step of adding the plurality of measured transmitting light signal data for the predetermined time interval and determining an average value of the transmitting light signal data;
further comprising,a third step of determining differences of the respective transmitting light signal data for the predetermined time interval from the average value of the transmitting signal data for the predetermined time interval prior to the respective concerned transmitting light signal; and
a fourth step of excluding transmitting light signal data for the predetermined time interval, of which determined difference exceeds a predetermined threshold value, from the object for later averaging computation of the transmitting light signal data. - View Dependent Claims (8, 9, 10)
-
Specification