Abstract: A light irradiation device includes a light source, an optical member and a sensor. The light source emits light. The optical member is supported so as to rotate around a rotation axis and includes a prism part that emits detection light based on the light. The sensor receives the detection light and detects a light amount of the detection light. The light amount of the detection light received by the sensor changes depending on a position of the optical member in a rotation direction when the optical member rotates.

Abstract: A light irradiation device includes a light source, a projection optical system, wedge prisms, and an aberration correction surface. The projection optical system projects an image formed based on light emitted from the light source. The aberration correction surface corrects an aberration occurring when the image is projected by the projection optical system. The wedge prism deflects the light emitted from the projection optical system. The wedge prism deflects the light deflected by the wedge prism. The wedge prisms are held so that a deflection direction of light emitted from the wedge prism is changed by rotation of at least one of the wedge prisms. The aberration correction surface is on the wedge prism side with respect to an emission surface of the projection optical system, and is located on the projection optical system side, with respect to the wedge prism, including an incidence surface of the wedge prism.

Abstract: The left headlamp (100L) includes first light source modules (13L, 14L, and 15L) and a light guide member (16L). The first light source modules (13L, 14L, and 15L) corresponds to partial light distributing patterns (P1L, P2L, and P3L) and have light projection directions parallel to each other. The light guide member (16L) has: first incident surfaces (17L, 18L, and 19L), arranged so as to face the first light source modules (13L, 14L, and 15L) and corresponding to the first light source modules (13L, 14L, and 15L); and an emitting surface (20L), arranged so as to face the first incident surfaces (17L, 18L, and 19L) and shared by the first light source modules (13L, 14L, and 15L). The light guide member (16L) forms a light distributing pattern (PL) by deflecting light projected by the first light source modules (13L, 14L, and 15L).

Abstract: A headlight module includes a light source, a light distribution control element and a projection optical element. The light source emits light. The light distribution control element forms a light distribution pattern by changing a divergence angle of the light incident therein. The projection optical element projects the light distribution pattern. The light distribution control element includes a first light distribution formation part configured to form a high luminosity region in the light distribution pattern and a second light distribution formation part configured to form a low luminosity region in the light distribution pattern. The low luminosity region is lower in luminosity than the high luminosity region.

Abstract: A headlight module includes: a light source for emitting light; a condensing optical element for concentrating the light; and an optical element including an incident surface for receiving the concentrated light, a reflecting surface for reflecting the received light, and an emitting surface for emitting the reflected light. The condensing optical element changes a divergence angle of the light to form a light distribution pattern. The reflected light and light that enters the optical element and is not reflected by the reflecting surface are superposed on a plane including a point located at a focal position of the emitting surface in a direction of an optical axis of the emitting surface and being perpendicular to the optical axis, thereby forming a high luminous intensity region in the light distribution pattern on the plane. The emitting surface has positive refractive power and projects the light distribution pattern formed on the plane.

Abstract: An illumination device including: a light source including a light emitting element that emits light; a first optical element that transmits the light; a second optical element that transmits the light transmitted by the first optical element; a holder that holds the second optical element; and a spring member including at least one spring portion that generates spring force by being deflected, the spring member pressing the second optical element against the holder with the spring force to hold the second optical element against the holder, wherein the first optical element and the second optical element deflect a center portion in a long edge direction of the at least one spring portion with respect to ends in the long edge direction of the at least one spring portion.

Abstract: A headlight module for projecting a light distribution pattern includes: a light source for emitting light; and an optical element including a first reflecting surface for reflecting the light as first reflected light, a second reflecting surface for reflecting, as second reflected light, light passing through a traveling direction side of an edge portion of the first reflecting surface, a first emitting surface for emitting the first reflected light, and a second emitting surface for emitting the second reflected light, the traveling direction side being a side toward which the first reflected light travels. The edge portion is an edge portion on the traveling direction side. The first reflecting surface forms a high luminous intensity region of the light distribution pattern by superposing the first reflected light and light that has not been reflected by the first reflecting surface, and forms a cutoff line of the light distribution pattern.

Abstract: A headlight module for projecting a light distribution pattern includes: a first source for emitting first light; a second source for emitting second light; an element including a first guide for guiding the first light and a second guide for guiding the second light; and a condensing element for concentrating the second light. An emitting surface of the element includes first and second regions. The first light is emitted from the regions. The second light is emitted from the second region. The second region side of the second guide is connected to the first guide. The first light guided by the first guide enters the second guide. The pattern includes a pattern formed at a light concentration position of the condensing element. The second guide includes an incident surface. A focal position of the emitting surface and a focal position of the incident surface coincide with the light concentration position.

Abstract: The left headlamp (100L) includes first light source modules (13L, 14L, and 15L) and a light guide member (16L). The first light source modules (13L, 14L, and 15L) corresponds to partial light distributing patterns (P1L, P2L, and P3L) and have light projection directions parallel to each other. The light guide member (16L) has: first incident surfaces (17L, 18L, and 19L), arranged so as to face the first light source modules (13L, 14L, and 15L) and corresponding to the first light source modules (13L, 14L, and 15L); and an emitting surface (20L), arranged so as to face the first incident surfaces (17L, 18L, and 19L) and shared by the first light source modules (13L, 14L, and 15L). The light guide member (16L) forms a light distributing pattern (PL) by deflecting light projected by the first light source modules (13L, 14L, and 15L).

Abstract: A headlight module includes a light source, a light guide element, and a projection optical element. The light source emits light. The light guide element has a reflecting surface for reflecting light emitted from the light source and an emitting surface for emitting light reflected by the reflecting surface. The projection optical element projects light emitted from the emitting surface. In a direction of an optical axis of the projection optical element, an end portion on the emitting surface side of the reflecting surface includes a point located at a focal position of the projection optical element.

Abstract: A headlight module includes: a light source for emitting light; a condensing optical element for concentrating the light; and an optical element including an incident surface for receiving the concentrated light, a reflecting surface for reflecting the received light, and an emitting surface for emitting the reflected light. The condensing optical element changes a divergence angle of the light to form a light distribution pattern. The reflected light and light that enters the optical element and is not reflected by the reflecting surface are superposed on a plane including a point located at a focal position of the emitting surface in a direction of an optical axis of the emitting surface and being perpendicular to the optical axis, thereby forming a high luminous intensity region in the light distribution pattern on the plane. The emitting surface has positive refractive power and projects the light distribution pattern formed on the plane.

Abstract: A headlight module includes: a light source that emits light; a projection lens that receives and emits the light; a holder including a flexible portion having a length in a direction of an optical axis of the lens and having a fixed end and a movable end, the holder holding the lens movably relative to the light source by holding the lens with the movable end; and a driver that moves the lens. The lens is translated on a plane perpendicular to the axis due to deflection of the flexible portion. The holder includes first and second flexible portions including plate-like portions parallel to the axis and perpendicular to each other. One end of the first flexible portion is the fixed end. Another end of the first flexible portion is connected to one end of the second flexible portion. Another end of the second flexible portion is the movable end.

Abstract: A headlight module includes a light source, a condensing optical element, and a projecting optical element. The light source emits light as projection light. The condensing optical element collects light emitted from the light source and forms an intermediate image with the collected light. A plurality of light sources is included. The projecting optical element magnifies and projects the plurality of intermediate images formed by light emitted from the plurality of light sources. The condensing optical element has a function of refracting passing light.

Abstract: An illumination device including: a light source including a light emitting element that emits light; a first optical element that transmits the light; a second optical element that transmits the light transmitted by the first optical element; a holder that holds the second optical element; and a spring member including at least one spring portion that generates spring force by being deflected, the spring member pressing the second optical element against the holder with the spring force to hold the second optical element against the holder, wherein the first optical element and the second optical element deflect a center portion in a long edge direction of the at least one spring portion with respect to ends in the long edge direction of the at least one spring portion.

Abstract: A headlight module includes a light source, a light guide element, and a projection optical element. The light source emits light. The light guide element has a reflecting surface for reflecting light emitted from the light source and an emitting surface for emitting light reflected by the reflecting surface. The projection optical element projects light emitted from the emitting surface. In a direction of an optical axis of the projection optical element, an end portion on the emitting surface side of the reflecting surface includes a point located at a focal position of the projection optical element.

Abstract: A headlight module includes a light source, a light guide element, and a projection optical element. The light source emits light. The light guide element has a reflecting surface for reflecting light emitted from the light source and an emitting surface for emitting light reflected by the reflecting surface. The projection optical element projects light emitted from the emitting surface. In a direction of an optical axis of the projection optical element, an end portion on the emitting surface side of the reflecting surface includes a point located at a focal position of the projection optical element.

Abstract: A headlight module for projecting a light distribution pattern includes: a light source for emitting light; and an optical element including a first reflecting surface for reflecting the light as first reflected light, a second reflecting surface for reflecting, as second reflected light, light passing through a traveling direction side of an edge portion of the first reflecting surface, a first emitting surface for emitting the first reflected light, and a second emitting surface for emitting the second reflected light, the traveling direction side being a side toward which the first reflected light travels. The edge portion is an edge portion on the traveling direction side. The first reflecting surface forms a high luminous intensity region of the light distribution pattern by superposing the first reflected light and light that has not been reflected by the first reflecting surface, and forms a cutoff line of the light distribution pattern.

Abstract: A headlight module for projecting a light distribution pattern includes: a first source for emitting first light; a second source for emitting second light; an element including a first guide for guiding the first light and a second guide for guiding the second light; and a condensing element for concentrating the second light. An emitting surface of the element includes first and second regions. The first light is emitted from the regions. The second light is emitted from the second region. The second region side of the second guide is connected to the first guide. The first light guided by the first guide enters the second guide. The pattern includes a pattern formed at a light concentration position of the condensing element. The second guide includes an incident surface. A focal position of the emitting surface and a focal position of the incident surface coincide with the light concentration position.

Abstract: A lighting apparatus includes a light source unit and a light guide unit. The light source unit includes a light source that emits light. The light guide unit includes a reflective surface that changes a traveling direction of the light to produce reflected light, and guides the light emitted from the light source unit to make the light reach the reflective surface. A plurality of the reflective surfaces-is provided. The light source unit selects one of the plurality of reflective surfaces and emits the light to the selected reflective surface. Thus it is possible to prevent an increase in the number of places where light sources are disposed and to change light-emitting regions on the light guide unit.