Optical device, optical system, and imaging apparatus

An optical device having a visible light transmittance that decreases from a central part thereof towards a peripheral part thereof, comprising:

• a visible light absorbing part that absorbs at least a part of visible light, and has a thickness that increases from a central part thereof towards a peripheral part thereof;
• and
• a visible light transmitting part that transmits the visible light, and is stacked on the visible light absorbing part,
• wherein a relationship T420/T360>=3 is satisfied in a region in which a visible light transmittance is highest, where T420 denotes a transmittance of light having a wavelength of 420 nm, and T360 denotes a transmittance of light having a wavelength of 360 nm.

An optical device having a light transmittance that decreases from a central part thereof towards a peripheral part thereof, comprising:

• a visible light absorbing part that absorbs at least a part of visible light, and has a thickness that increases from a central part thereof towards a peripheral part thereof;
• and
• a visible light transmitting part that transmits the visible light, and is stacked on the visible light absorbing part,
• wherein a transmittance of light having a wavelength in a range of 300 nm to 360 nm is 10% or lower.