Abstract: An irradiation optical system configured to irradiate an object with first light includes: a light source including a surface emitting element emitting the first light from a light emitting surface; a light shaping member on which the first light emitted from the light source is incident via a light incidence surface and which shapes the incident first light using a light passing hole and emits the shaped first light; and a first lens configured to form an image of the first light emitted from the light shaping member on the object. A distance between the light emitting surface of the surface emitting element and the light incidence surface of the light shaping member is equal to or less than 26 times a size.

Abstract: A seat rail of a motorcycle has two side members configured using fiber-reinforced resin. Each side member has a main body and an upper flange portion that protrudes in a width direction of a vehicle body from an upper side edge of the main body. An attachment element for attachment to the main frame of the vehicle body is provided at a front end portion of each side member, and the seat rail has at least one upper connecting member that connects two upper flange portions. The upper flange portion has an inflection section connecting the front section and the rear section such that the rear section of the upper flange portion is raised toward an upper direction with respect to the front section, and the inflection section is arranged between the front end portion of the side member and a foremost upper connecting member.

Abstract: Disclosed herein is a straddle type vehicle that uses resin seat rails, and in which attachment parts of footrests for an occupant of a rear seat of a tandem seat are provided to fastening parts of a member connecting right and left seat rails. The straddle type vehicle may include: resin right and left seat rails extending in a vehicle longitudinal direction; a middle connection member connecting the seat rails to each other; a tandem seat assembled to the seat rails and footrests for an occupant of the tandem seat respectively coupled to the right and left seat rails. A connection part of the middle connection member of the seat rails is provided within a range obtained by vertically extending an outer edge of an attachment part of the footrest coupled to each of the seat rails in side view.

Abstract: A seat rail of a motorcycle according to the present invention has two side members configured using fiber-reinforced resin. Each side member has a main body and an upper flange portion that protrudes in a width direction of a vehicle body from an upper side edge of the main body. An attachment element for attachment to the main frame of the vehicle body is provided at a front end portion of each side member, and the seat rail has at least one upper connecting member that connects two upper flange portions. The upper flange portion has an inflection section connecting the front section and the rear section such that the rear section of the upper flange portion is raised toward an upper direction with respect to the front section, and the inflection section is arranged between the front end portion of the side member and a foremost upper connecting member.

Abstract: Disclosed herein is a straddle type vehicle that uses resin seat rails, and in which attachment parts of footrests for an occupant of a rear seat of a tandem seat are provided to fastening parts of a member connecting right and left seat rails. The straddle type vehicle may includes: resin right and left seat rails extending in a vehicle longitudinal direction; a middle connection member connecting the seat rails to each other; a tandem seat assembled to the seat rails and footrests for an occupant of the tandem seat respectively coupled to the right and left seat rails. A connection part of the middle connection member of the seat rails is provided within a range obtained by vertically extending an outer edge of an attachment part of the footrest coupled to each of the seat rails in side view.