Abstract: An inactivation device for bacteria and/or viruses includes: an ultraviolet light source emitting ultraviolet light having a main emission wavelength belonging to within a wavelength range from 190 nm or more to less than 240 nm; an enclosure including a light-extraction surface that is constituted by an opening or a window member, and housing the ultraviolet light source thereinside; and a reflective member on which the ultraviolet light that has passed through the light-extraction surface is incident and changes a traveling direction of the ultraviolet light. The reflective member has a reflective surface that makes an optical axis of the ultraviolet light that has been incident change to a direction directly away from the enclosure, or to a direction away from the enclosure after traveling toward a center area of the enclosure, with respect to a first direction parallel to the light-extraction surface.

Abstract: A linear light source apparatus for an image reader that has an effective light emitting length substantially equal to or longer than the length of the light conductor. The apparatus includes a rod-shaped light conductor, a light emitting element, a concave reflection mirror, and a diffusing-and-reflecting member that has a diffusing-and-reflecting plane disposed to face a reflecting portion of the light conductor along the longitudinal direction. The diffusing-and-reflecting member has a facing portion facing the light emitting element. The facing portion is provided at the end of the diffusing-and-reflecting plane of the diffusing-and-reflecting member in the vicinity of the light emitting element. Light from the light emitting element and/or the concave reflection mirror is incident on the light emitting element facing portion. That light is reflected toward the end face of the light conductor in the vicinity of the light emitting element, and introduced into the light conductor.

Abstract: An LED linear light source includes an approximately rod-shaped light guiding member, at an end portion of which an LED is provided. The light guiding member is in an approximately arc shape in a cross sectional view taken perpendicular to an optical axis. The light guiding member has an upper face including a light emission face for emitting light and a lower face including a reflective face, which are arranged in parallel. A diffusing member diffuses light provided on part of an outer circumferential face adjacent to a light entering end face of the light guiding member. A light absorption member is provided in an outside of the light guiding member near at an end portion thereof.

Abstract: An LED linear light source includes an approximately rod-shaped light guiding member, at an end portion of which an LED is provided. The light guiding member is in an approximately arc shape in a cross sectional view taken perpendicular to an optical axis. The light guiding member has an upper face including a light emission face for emitting light and a lower face including a reflective face, which are arranged in parallel. A diffusing member diffuses light provided on part of an outer circumferential face adjacent to a light entering end face of the light guiding member. A light absorption member is provided in an outside of the light guiding member near at an end portion thereof.

Abstract: A linear light source, in which an LED is arranged at an end portion of an approximately cylindrical light guiding member configured so that an upper portion, which has an approximately circular portion and which includes a light emitting face, a flat lower portion, which includes a light reflection face formed so as to face the upper portion, and side portions which connect the upper portion and the lower portion to each other, are arranged to extend in a longitudinal direction, respectively, and a light diffusion and reflection member provided outside of the light guiding member.