Panasonic Intellectual Property Management Co., Ltd.

Yosuke Araki

Kazumasa Takata

Masaru Fujita

Wahei Agemizu

Tomohisa Sakaguchi

Atsushi Fukui

Ryoma Murase

Jun Hirai

Hiroshi Hamano

Hiroshi Umiji

An optical multiplexer includes a plurality of light sources that emit a plurality of laser beams having different wavelengths, a collimator that collimates a plurality of laser beams emitted from a plurality of light sources, and a diffraction grating that diffracts a plurality of laser beams collimated by the collimator and emits a plurality of laser beams along a same optical path, the diffraction grating being of a transmission-type. A plurality of light sources are linearly arranged on an incident side focal plane of the collimator, a grating surface of the diffraction grating is disposed on an emission side focal plane of the collimator, and distance D between two adjacent light sources is set to satisfy D=f×(λ−λ)/p, where λ, λ(λ>λ) are respectively wavelengths of laser beams emitted from the two adjacent light sources.

Optical multiplexer

Light control body () has first incident surface () and first reflection surface (). First incident surface () condenses part of light emitted from light source () and emits the light toward incident surface () of light guide plate (). First reflection surface () reflects the light that is emitted from light source () and does not pass through first incident surface (), and emits the light toward incident surface () of light guide plate (). First focal position () of first incident surface () and second focal position () of first reflection surface () are set at positions that are different from each other and away from the light emission surface of light source ().

Optical system

An optical system includes a light guide member having a light-incident surface, a first surface, a light-emitting surface facing the first surface, a first end surface, a second end surface, a plurality of collimating lenses disposed on the light-incident surface and being arranged along a first direction, and a plurality of prism pieces. The plurality of prism pieces include two or more prism pieces having different inclination angles with respect to the light-incident surface depending on positions of the prism pieces in at least the first direction, and each of the inclination angles of the two or more prism pieces is an angle formed between the first direction and the longitudinal axis of a corresponding prism piece. Each of the inclination angles of the two or more prism pieces increases as the corresponding prism piece is positioned closer to any of the first end surface or the second end surface.

Lightguide lighting system for display system

A lighting device includes light emitting element; first lens that receives light emitted from light emitting element and emits first emission light; and second lens that receives the first emission light and emits second emission light. Second lens includes second convex incident surface receiving the first emission light, second convex emission surface that is provided on a right side of a drawing and emits the second emission light, and second top surface portion and second bottom surface portion each located between second incident surface and second emission surface. Second bottom surface portion includes first inclined surface and second inclined surface formed to be inclined with respect to an optical axis of light emitting element.

Lighting device

A lighting device includes a light emitting element; a first lens that receives light emitted from the light emitting element and emits first emission light; and a second lens that receives the first emission light and emits second emission light. The first lens has a first emission surface emitting the first emission light, the first emission surface having a convex shape protruding in a Z direction.

Growing community of inventors

Osaka, Japan

Yosuke Araki