Lighting device and vehicular headlamp

A vehicular headlamp including a plurality of lighting devices, the plurality of lighting devices including at least first, second and third lighting devices, each comprising:

• a light emitting element;
• a first lens that captures and emits light generated by the light emitting element;
• and
• a second lens that captures light emitted from the first lens and emits the light in a predetermined direction,
• wherein the first lens includes
• a first lens entrance through which the light generated by the light emitting element enters,
• a first lens exit that emits the light entered from the first lens entrance and transmitted through an inside of the first lens, and
• a plurality of first lens side portion wall surfaces that are provided between the first lens entrance and the first lens exit, and
• wherein the plurality of first lens side portion wall surfaces include
• a reflection side surface portion that reflects the light entered the inside of the first lens from the first lens entrance, and
• a side surface portion that is configured to allow light having a luminous intensity smaller than a luminous intensity of light entering the reflection side surface portion to enter
• wherein the first lens entrance has a recessed shape surrounding a periphery of the light emitting element, and includes
• a first entrance surface that is a bottom surface of the recessed shape, and
• a second entrance surface that is a side surface of the recessed shape,
• wherein the reflection side surface portion of the plurality of first lens side portion wall surfaces includes
• a first reflection surface that reflects the light entered the second entrance surface, and
• a second reflection surface that reflects the light entered the first entrance surface and the light reflected by the first reflection surface, and
• wherein the side surface portion of the plurality of first lens side portion wall surfaces is configured to allow light having a luminous intensify smaller than a luminous intensity of the light entering the first reflection surface and the second reflection surface to enter,
• wherein light emitted from the second lens of each of the respective lighting devices overlaps each other,
• wherein in the first and second lighting devices:
• the first lens entrance has a recessed shape surrounding a periphery of the light emitting element, and includes
• a first entrance surface that is a bottom surface of the recessed shape, and
• a second entrance surface that is a side surface of the recessed shape,
• the reflection side surface portion of the plurality of first lens side portion wall surfaces includes
• a first reflection surface that reflects the light entered the second entrance surface, and
• a second reflection surface that reflects the light entered the first entrance surface and the light reflected by the first reflection surface, and
• the side surface portion of the plurality of first lens side portion wall surfaces is configured to allow light having a luminous intensity smaller than a luminous intensity of the light entering the first reflection surface and the second reflection surface to enter,
• wherein the first lighting device has the first lens provided with a step on the second reflection surface,
• wherein the second lighting device has the first lens provided with a step on the second reflection surface, and the second lens provided with a plurality of depressions having a spherical shape, or an elliptical spherical shape, or a quadrangular pyramid shape on a second lens exit, and
• wherein the third lighting device has the second lens provided with a periodic structure having a wave shape or a conical shape on a second lens exit.