Patent ID: 7855750

Claim:
An optical device, comprising: a photoelectric converter that converts a light of an image formed at a light-receiving surface of the photoelectric converter to an electric signal; an optical low pass filter provided at a light-receiving surface side of the photoelectric converter, and including: a first optical member having a first dimension along a first direction perpendicular to an optical axis, a thickness along a direction of the optical axis, and a first optical characteristic, a second optical member laminated onto the first optical member and having a second dimension different from the first dimension along the first direction and a second optical characteristic different from the first optical characteristic, and a step portion having a width defined by a difference between the first dimension of the first optical member and the second dimension of the second optical member, and a height corresponding to the thickness of the first optical member along the direction of the optical axis; and a holding member having a plate thickness that is thinner than the thickness of the first optical member along the direction of the optical axis, and that contacts the step portion to elastically bias the optical low pass filter in the direction of the optical axis to hold the optical low pass filter in the optical device.