Spectroscopic sensor device and electronic equipment
A spectroscopic sensor that applies lights in a wavelength band containing plural wavelengths to an object and spectroscopically separates reflected lights or transmitted lights from the object using plural light band pass filters that transmit the respective specific wavelengths and plural photosensor parts to which corresponding transmitted lights are input based on output results of independent photosensors. The spectroscopic sensor may be integrated in a semiconductor device or module by integration using a semiconductor process and downsizing may be realized.
1. A pulsimeter comprising:
a light source unit that applies a light to a body portion of a user;
a spectroscopic sensor that receives an incident light signal from the light source unit reflected from or transmitted through the body portion of the user;
a substrate that supports the light source and the spectroscopic sensor;
a processor that determines a characteristic of blood of the user based on the incident light signal; and
a light blocking member which prohibits the incident light from the light source unit from directly entering the spectroscopic sensor, and is provided between the light source unit and the spectroscopic sensor,
the spectroscopic sensor including:
a photosensor that has an impurity area to sense the incident light,
an angle limiting filter that limits an incident angle of the incident light to the photosensor, the angle limiting filter includes a plurality of light blocking materials disposed on a portion of the impurity area, and
the angle limiting filter blocks the incident light having an incident angle between the incident light and a line normal to the photosensor that is greater than 30 degrees.
2. The pulsimeter of claim 1 , wherein the impurity area has a first area in contact with the light blocking material, and a second area not in contact with the light blocking material, the second area sensing a light through the angle limiting filter.
3. The pulsimeter of claim 1 , wherein
the photosensor and the angle limiting filter are formed using a semiconductor process.
4. The pulsimeter of claim 1 , wherein the light source unit and the spectroscopic sensor are disposed on a same substrate.
5. The pulsimeter of claim 1 , further comprising:
a light band-pass filter which is disposed on the angle limiting filter.
6. Electronic equipment comprising the pulsimeter according to claim 1 .
7. The pulsimeter of claim 1 , wherein
the angle limiting filter includes a light absorbing material or a light reflecting material.
8. The pulsimeter of claim 5 , wherein
the light band-pass filter is comprised of a TiO 2 film and a SiO 2 film.