Abstract: A photochromic composition contains, in a predetermined combination: one or more photochromic compounds represented by General Formula 1; and one or more selected from the group consisting of a photochromic compound represented by General Formula A, a photochromic compound represented by General Formula B, and a photochromic compound represented by General Formula C.

Abstract: An image reading device may include a conveyance path; a conveyance mechanism; and a first image sensor and a second image sensor that are disposed on both sides of the conveyance path. The conveyance mechanism may include a driving source; a pair of first conveyance rollers located upstream of a first and second image read position; and a pair of second conveyance rollers located downstream of the first and second image read position. The pair of first conveyance rollers may include a first drive roller; and a first opposing roller. The pair of second conveyance rollers may include a second drive roller and a second opposing roller.

Abstract: An image reading device may include a conveyance path; a conveyance mechanism; and a first image sensor and a second image sensor that are disposed on both sides of the conveyance path. The conveyance mechanism may include a driving source; a pair of first conveyance rollers located upstream of a first and second image read position; and a pair of second conveyance rollers located downstream of the first and second image read position. The pair of first conveyance rollers may include a first drive roller; and a first opposing roller. The pair of second conveyance rollers may include a second drive roller and a second opposing roller.

Abstract: An adapter for an image scanner, the image scanner being structured to convey a card, and the adapter being structured so that a front surface and a back surface of a card-shaped medium thinner than the card are read by the image scanner, the adapter may include a first sheet which is transparent and longer than a length of the card, and the card-shaped medium being placed on a front surface of the first sheet; a spacer having a constant thickness which is transparent and fixed to at least one of a front end portion and a rear end portion of the front surface of the first sheet; and a second sheet which is transparent and fixed to the spacer so as to be overlapped with the first sheet, and the second sheet covering the card-shaped medium from an opposite side to the first sheet.