BIOLOGICAL INFORMATION DETECTOR AND BIOLOGICAL INFORMATION MEASURING DEVICE
First Claim
1. A biological information detector, comprisinga light-emitting part that emits light in an emission wavelength band that includes a wavelength of interest, the light being emitted towards a detection site of a test subject;
- a light-receiving part that receives light having biological information, the light being light emitted by the light-emitting part and reflected at the detection site, the light-receiving part having sensitivity in a reception wavelength band that includes the emission wavelength band;
a reflecting part having a reflecting surface, the light having the biological information being reflected at the reflecting surface towards the light-receiving part; and
a filter that transmits the wavelength of interest, the filter being provided between the detection site and the light-receiving part;
whereinwhen an angle of incidence of incident light on the filter is a predetermined angle, a maximum wavelength of the incident light passing through the filter is higher than the wavelength of interest, and the filter inhibits light that is within a wavelength band from the maximum wavelength of the incident light to at least a maximum wavelength of the reception wavelength band; and
the reflecting surface is configured so that only light having an angle of incidence that is equal to or less than the predetermined angle reaches the light-receiving part.
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Accused Products
Abstract
A biological information detector includes a light-emitting part for emitting light in an emission wavelength band that includes a wavelength of interest, a light-receiving part for receiving light R1′ having biological information; a reflecting part for reflecting the light R1′ having the biological information at a reflecting surface towards the light-receiving part; and a filter for transmitting the wavelength of interest, the filter being provided between a detection site and the light-receiving part. The filter inhibits light in a wavelength band from a maximum wavelength of incident light to at least a maximum wavelength in the reception wavelength band, and the reflecting surface is configured so that only light having an angle of incidence that is equal to or less than the predetermined angle reaches the light-receiving part.
19 Citations
7 Claims
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1. A biological information detector, comprising
a light-emitting part that emits light in an emission wavelength band that includes a wavelength of interest, the light being emitted towards a detection site of a test subject; -
a light-receiving part that receives light having biological information, the light being light emitted by the light-emitting part and reflected at the detection site, the light-receiving part having sensitivity in a reception wavelength band that includes the emission wavelength band; a reflecting part having a reflecting surface, the light having the biological information being reflected at the reflecting surface towards the light-receiving part; and a filter that transmits the wavelength of interest, the filter being provided between the detection site and the light-receiving part;
whereinwhen an angle of incidence of incident light on the filter is a predetermined angle, a maximum wavelength of the incident light passing through the filter is higher than the wavelength of interest, and the filter inhibits light that is within a wavelength band from the maximum wavelength of the incident light to at least a maximum wavelength of the reception wavelength band; and the reflecting surface is configured so that only light having an angle of incidence that is equal to or less than the predetermined angle reaches the light-receiving part. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification