Abstract: A blood vessel imaging device obtains peak height information of a differential function F?(x) from an adjustment dial. The blood vessel imaging device, based on the peak height information and peak position information of the differential function F?(x), then defines the differential function F?(x). Subsequently, the blood vessel imaging device calculates an LUT function F(x) that indicates the shape of an LUT by integrating the defined differential function F?(x). The blood vessel imaging device generates an LUT based on the LUT function F(x). The blood vessel imaging device reads out a picked-up image stored in a picked-up image memory, converts a luminance value of the picked-up image being read using the LUT, and displays the image with the converted luminance value.

Abstract: An imaging device used for a blood vessel imaging apparatus includes: a housing; an image sensor mounted in the housing; a control circuit board fixedly held in the housing and provided with the image sensor; an illumination circuit board disposed in the housing so as to be opposed to the control circuit board, and having an opening in a position opposed to the image sensor; a tubular light intercepting member disposed so as to cover the periphery of the image sensor and protrude through the opening; and an optical part attached to the tubular light intercepting member.