Optical filter, imaging device, and ranging device

An imaging device comprising:

• a filter part comprising a first filter area that transmits light rays of a first wavelength band and a second filter area that transmits light rays of a second wavelength band, the first wavelength band and the second wavelength band comprising a common wavelength band;
• a filter frame that holds the filter part;
• and
• a lens unit comprising one or more lenses through which the light rays transmitting the first filter area and the light rays transmitting the second filter area pass, wherein
• the filter frame is directly or indirectly attached to a first end of the lens unit, and
• a distance between the filter part and an aperture within the lens unit is longer than a distance between the first end and the aperture.

A ranging device comprising:

• an imaging device;
• and
• one or more processors configured to process an image acquired by the imaging device, wherein
• the imaging device comprises:
• a filter part comprising a first filter area that transmits light rays of a first wavelength band and a second filter area that transmits light rays of a second wavelength band, the first wavelength band and the second wavelength band comprising a common wavelength band;
• a filter frame that holds the filter part;
• and
• a lens unit comprising one or more lenses through which the light rays transmitting the first filter area and the light rays transmitting the second filter area pass, wherein
• the filter frame is directly or indirectly attached to a first end of the lens unit, and
• a distance between the filter part and an aperture within the lens unit is longer than a distance between the first end and the aperture.