Onboard camera
The onboard camera is mounted in a vehicle to shoot a driving environment of the vehicle by receiving external light from outside of the vehicle, the onboard camera includes: a camera unit having a lens unit which generates an image by receiving the external light and an image-capturing device which generates an image signal based on the image generated by the lens unit; and a polarization plate arranged in front of the camera unit, the image-capturing device constituting the camera unit is a CMOS image sensor, and the polarization plate is a polarization plate whose cross transmittance with respect to S-polarized wave having a wavelength from 420 nm to 700 nm is 5 to 20% or a polarization plate whose parallel transmittance with respect to natural light having a wavelength from 420 nm to 700 nm is 45 to 60%.
1. An onboard camera mounted in a vehicle to shoot a driving environment of the vehicle by receiving external light from outside of the vehicle through a front windshield of the vehicle and reflection light reflected on the front windshield, the onboard camera comprising:
a camera unit including a lens unit which generates an image by receiving the external light and an image-capturing device which generates an image signal based on the image generated by the lens unit; and
a polarization plate arranged in front of the camera unit,
wherein the image-capturing device constituting the camera unit is a CMOS image sensor including a pixel array in which a plurality of pixel units are arranged, and
the polarization plate is a polarization plate whose cross transmittance with respect to S-polarized wave having a wavelength from 420 nm to 700 nm is 5 to 20%, and
the pixel array includes:
a first pixel unit configured to have four pixels of a first pixel corresponding to blue light, a second pixel corresponding to green light, a third pixel corresponding to red light, and a fourth pixel corresponding to near infrared light as one unit by arranging the first to fourth pixels adjacent to each other; and
a second pixel unit configured to have four pixels of a fifth pixel corresponding to blue light, a sixth pixel corresponding to green light, a seventh pixel corresponding to red light, and an eighth pixel corresponding to green light as one unit by arranging the fifth to eighth pixels adjacent to each other.
2. An onboard camera mounted in a vehicle to shoot a driving environment of the vehicle by receiving external light from outside of the vehicle through a front windshield of the vehicle and reflection light reflected on the front windshield, the onboard camera comprising:
a camera unit including a lens unit which generates an image by receiving the external light and an image-capturing device which generates an image signal based on the image generated by the lens unit; and
a polarization plate arranged in front of the camera unit,
wherein the image-capturing device constituting the camera unit is a CMOS image sensor including a pixel array in which a plurality of pixel units are arranged, and
the polarization plate is a polarization plate whose parallel transmittance with respect to natural light having a wavelength from 420 nm to 700 nm is 45 to 60%, and
the pixel array includes:
a first pixel unit configured to have four pixels of a first pixel corresponding to blue light, a second pixel corresponding to green light, a third pixel corresponding to red light, and a fourth pixel corresponding to near infrared light as one unit by arranging the first to fourth pixels adjacent to each other; and
a second pixel unit configured to have four pixels of a fifth pixel corresponding to blue light, a sixth pixel corresponding to green light, a seventh pixel corresponding to red light, and an eighth pixel corresponding to blue light as one unit by adjacently arranging the fifth to eighth pixels adjacent to each other.
3. The onboard camera according to claim 1 ,
wherein a transmittance of the polarization plate with respect to infrared light is 45% or more and 100% or less.
4. The onboard camera according to claim 2 ,
wherein a transmittance of the polarization plate with respect to infrared light is 45% or more and 100% or less.
5. The onboard camera according to claim 1 ,
wherein the first pixel is configured such that a transmittance with respect to light having a wavelength from 400 nm to 500 nm is 25% or more and a transmittance with respect to light having a wavelength from 550 nm to 750 nm is 10% or less,
the second pixel is configured such that a transmittance with respect to light having a wavelength from 510 nm to 590 nm is 25% or more, a transmittance with respect to light having a wavelength from 400 nm to 500 nm is 15% or less, and a transmittance with respect to light having a wavelength from 620 nm to 750 nm is 15% or less,
the third pixel is configured such that a transmittance with respect to light having a wavelength from 590 nm to 700 nm is 30% or more, a transmittance with respect to light having a wavelength from 400 nm to 570 nm is 10% or less, and a light ray transmittance with respect to light having a wavelength of 800 nm or more is 20% or less,
the fourth pixel has a structure capable of detecting near infrared light having a wavelength from 850 nm to 900 nm,
the fifth pixel is configured such that a transmittance with respect to light having a wavelength from 400 nm to 500 nm is 25% or more and a transmittance with respect to light having a wavelength from 550 nm to 750 nm is 10% or less,
the sixth pixel and the eighth pixel are configured such that a transmittance with respect to light having a wavelength from 510 nm to 590 nm is 25% or more, a transmittance with respect to light having a wavelength from 400 nm to 500 nm is 15% or less, and a transmittance with respect to light having a wavelength from 620 nm to 750 nm is 15% or less, and
the seventh pixel is configured such that a transmittance with respect to light having a wavelength from 590 nm to 700 nm is 30% or more, a transmittance with respect to light having a wavelength from 400 nm to 570 nm is 10% or less, and a light ray transmittance with respect to light having a wavelength of 800 nm or more is 20% or less.
6. The onboard camera according to claim 2 ,
wherein the first pixel is configured such that a transmittance with respect to light having a wavelength from 400 nm to 500 nm is 25% or more and a transmittance with respect to light having a wavelength from 550 nm to 750 nm is 10% or less,
the second pixel is configured such that a transmittance with respect to light having a wavelength from 510 nm to 590 nm is 25% or more, a transmittance with respect to light having a wavelength from 400 nm to 500 nm is 15% or less, and a transmittance with respect to light having a wavelength from 620 nm to 750 nm is 15% or less,
the third pixel is configured such that a transmittance with respect to light having a wavelength from 590 nm to 700 nm is 30% or more, a transmittance with respect to light having a wavelength from 400 nm to 570 nm is 10% or less, and a light ray transmittance with respect to light having a wavelength of 800 nm or more is 20% or less,
the fourth pixel has a structure capable of detecting near infrared light having a wavelength from 850 nm to 900 nm,
the fifth pixel is configured such that a transmittance with respect to light having a wavelength from 400 nm to 500 nm is 25% or more and a transmittance with respect to light having a wavelength from 550 nm to 750 nm is 10% or less,
the sixth pixel and the eighth pixel are configured such that a transmittance with respect to light having a wavelength from 510 nm to 590 nm is 25% or more, a transmittance with respect to light having a wavelength from 400 nm to 500 nm is 15% or less, and a transmittance with respect to light having a wavelength from 620 nm to 750 nm is 15% or less, and
the seventh pixel is configured such that a transmittance with respect to light having a wavelength from 590 nm to 700 nm is 30% or more, a transmittance with respect to light having a wavelength from 400 nm to 570 nm is 10% or less, and a light ray transmittance with respect to light having a wavelength of 800 nm or more is 20% or less.