Imaging apparatus
A camera device and pixel technology, applied in image communication, TV, color TV, etc.
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Embodiment approach 1
[0048] [1. Camera device]
[0049] First, use Figure 1A ~ Figure 2 The configuration of the imaging device D1 according to the first embodiment will be described.
[0050] Figure 1A It is a schematic diagram which shows the imaging device D1 of this embodiment. The imaging device D1 has a light source Ls, an image sensor S, and a control circuit Sy.
[0051] [1-1. Light source Ls]
[0052] The light source Ls irradiates the measurement object O with light. The light irradiated from the light source Ls and reaching the measurement object O becomes a component reflected on the surface of the measurement object O (surface reflection component I1), and a component reflected or scattered once inside the measurement object O, or a multiple scattered component (internal reflection component I1). Scattering component I2). The surface reflection component I1 includes three types: a direct reflection component, a diffuse reflection component, and a diffuse reflection component. ...
Embodiment approach 2
[0097] The second embodiment differs from the first embodiment in that the control circuit Sy determines the phase of the shutter timing. Here, the detailed description of the content in this embodiment that is substantially the same as that in Embodiment 1 will be omitted.
[0098] The time it takes for the light emitted from the light source Ls to reflect from the measurement object O and return to the image sensor S depends on the travel distance of the light. Therefore, the phase of the shutter timing is adjusted in accordance with the distance from the imaging device D1 to the object O to be measured. Figure 3A is a diagram showing an example of adjusting the shutter timing. Figure 3A (a) in (a) represents the time response waveform of the light signal reaching the image sensor S. Figure 3A The optical signal shown in (a) is a signal including both the surface reflection component I1 and the internal scattering component I2. Figure 3A The (b) in it means that the ...
Embodiment approach 3
[0111] Embodiment 3 is different from Embodiment 1 in that imaging device D2 has a plurality of light sources Ls. Here, the detailed description of the same contents as those in Embodiment 1 in this embodiment will be omitted.
[0112] Figure 5 It is a schematic diagram of the imaging device D2 according to the third embodiment. The imaging device D2 has a light source Ls1 and a light source Ls2. Furthermore, the imaging device D2 has an arithmetic circuit Pr.
[0113] The light source Ls1 and the light source Ls2 emit light in different wavelength bands. Usually, the absorption characteristic and the scattering characteristic of the measurement object O differ depending on the wavelength, and therefore, more detailed component analysis of the measurement object O can be performed by detecting the wavelength dependence of the optical signal based on the internal scattering component I2. For example, when the measurement object O is a living tissue, the absorbance of oxyhe...
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