Patent ID: 8810754

Claim:
An interference filter comprising: a base body including a major surface; a lower semi-transmissive layer provided on the major surface; and an upper semi-transmissive layer provided on the lower semi-transmissive layer, the base body, the lower semi-transmissive layer and the upper semi-transmissive layer forming a first region to selectively transmit blue light, a second region to selectively transmit green light, and a third region to selectively transmit red light, the first region, the second region and the third region being arranged in a plane parallel to the major surface, and a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the second region being shorter than a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the first region, and shorter than a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the third region, wherein the distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the second region is zero, and wherein the distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the third region is 10.8 nanometers or more and 13.2 nanometers or less.