Panasonic Intellectual Property Management Co., Ltd.

Panasonic Semiconductor Solutions Co., Ltd.

Panasonic Corporation

Hirotaka Ueno

Kazuhiko Yamanaka

Hideo Yamaguchi

Takashi Haruguchi

Hideki Kasugai

Kazuhisa Ide

Kimihiro Murakami

Masaomi Inoue

Kouichi Bairin

Kiyoshi Hibino

Kouichi Kumamaru

Masahiro Shiihara

Kousei Sano

Kenichi Matsumoto

Masaharu Fukakusa

Taku Kobayashi

Kazuki Adachi

Wakahiko Okazaki

Yasuhiko Enami

A distance measurement device for measuring a distance to an object that exists in a distance measurement region includes: a light source configured to emit laser light; a lens configured to converge the laser light emitted from the light source, into substantially parallel light; a tubular light blocking member disposed on an optical path of the laser light emitted from the light source and surrounding the optical path; a photodetector configured to detect reflected light, of the laser light, reflected at the distance measurement region; and a condensing lens configured to condense the reflected light passing through the outside of the light blocking member, onto the photodetector.

Distance measurement device

A distance measurement device includes: a mirror disposed so as to be tilted relative to a rotation center axis; a drive unit configured to rotate the mirror about the rotation center axis; a photodetector configured to detect reflected light, of laser light, reflected in a distance measurement region; and a condensing lens disposed on the rotation center axis and configured to condense the reflected light reflected by the mirror, on the photodetector. The mirror has a shape elongated in one direction and is disposed such that a short axis thereof is tilted relative to the rotation center axis in a direction parallel to a plane including the rotation center axis. A width in a short-axis direction of the mirror is smaller than a width of a lens portion of the condensing lens as viewed in a direction parallel to the rotation center axis.

A light source device includes a mounted substrate which is a multi-layered substrate, a semiconductor light-emitting device which emits a laser beam, a wavelength-converting member which radiates fluorescence by being irradiated with the laser beam emitted from the semiconductor light-emitting device as an excitation light, a state detection circuit, an electric field effect type transistor which adjusts an electric current amount applied to the semiconductor light-emitting device upon receipt of an output from the state detection circuit, and an external connecting member, and the semiconductor light-emitting device, the state detection circuit, the transistor, and the external connecting member are mounted on the single mounted substrate.

Light source device

A light emitting device includes a wavelength conversion element, and an excitation light source which radiates excitation light to the wavelength conversion element. The wavelength conversion element includes a support member having a supporting surface, and a wavelength conversion member disposed on the supporting surface so as to be contained within the support member when the support member is viewed from the supporting surface side. An outer peripheral region on the support member, which is an outer peripheral portion of an arrangement region including the wavelength conversion member and is exposed from the wavelength conversion member, includes a light absorbing portion which can absorb first light having same wavelength as the excitation light or a light scattering portion which can scatter the first light. The arrangement region includes a reflective member which is disposed between the wavelength conversion member and the support member, and is different from the support member.

Wavelength conversion element and light emitting device

A light source device includes: a holder that has a first surface and a second surface located higher than the first surface, and is an integral structure; a semiconductor light-emitting device on the first surface; an optical element unit that is disposed above the semiconductor light-emitting device, and has a reflective surface that inclines with respect to the first surface and reflects emitted light from the semiconductor light-emitting device; and a phosphor optical element that is disposed on the second surface and irradiated with reflected light from the optical element unit.

Light source device and projection device

An optical head device includes a diffraction grating which diffracts a part of the light beam which is selectively emitted from a semiconductor laser having two luminous points and is divided along a tangential direction of the track of the optical disk, a relationship of arrangement of the second and third regions corresponds to a relationship of the optical axes of the first and second light beams on the diffraction grating, the second region is located at a position crossing an optical axis of the first light beam, a phase difference between phases of the first and third regions is 180&#xb0;, a phase difference between phases of the third and fourth regions is 180&#xb0;, and the third region has a width which is not larger than amount of a position deviation of &#xb1;first-order diffracted light of the second light beam from zeroth-order diffracted light.

Optical head device, optical information device, and diffractive element

Growing community of inventors

Osaka, Japan

Hirotaka Ueno