Proximity-type imaging device and imaging filter

A proximity-type imaging device comprising:

• an image sensor that performs photoelectric conversion for light transmitted from a subject that is in proximity thereto using a plurality of pixels arranged in a predetermined arrangement, so as to capture the subject;
• and
• an imaging filter that includes
• a transparent substrate, and
• a light shielding film which is formed with openings having one-to-one correspondence with the pixels and which is provided on a subject side of the substrate,
• the imaging filter that is disposed on a front side of the image sensor and that limits an incidence angle of light incident to the image sensor to such an angle range that the light is incident from each opening to the pixel corresponding to each opening, wherein
• the following condition is satisfied
• L
• ≥
• T
• 1
• n
• 1
• 2
• -
• 1
• where
• n1 denotes a refractive index of the substrate,
• T1 denotes a thickness of the substrate, and
• L denotes a shortest distance between a contour of one opening and a contour of the pixel corresponding to an opening adjacent to the one opening in an in-plane direction.