A projector generates white light from a laser light source and uses the white light for image display. The white light generator has a rectangular light generating lens that generates excitation light of a rectangular shape from the blue light of a blue laser and a phosphor wheel, coated with a phosphor that is irradiated with the excitation light, to emit yellow light. In the phosphor wheel, a length in the vertical direction of a rectangular shape of an irradiation region is represented by v, and a length in the horizontal direction is represented by h, wherein h<v; and a center of the rectangular shape is within any one of a region having an angle of 45° or more and 135° or less and a region having an angle of 225° or more and 315° or less in the phosphor coat region of the phosphor wheel.

A light source system, comprising: a wavelength conversion layer (102, 202) used for receiving exciting light (L3) and generating excited light (L2); a transparent thermal conduction substrate (104, 204) used for supporting the wavelength conversion layer (102, 202), and an excitation light source which emits the exciting light (L3) from a side of the wavelength conversion layer (102, 202) to the wavelength conversion layer (102, 202); and a red light source which emits red light (L1) from a side of the transparent thermal conduction substrate (104, 204) to the wavelength conversion layer (102, 202). The light source system can effectively solve the problem of insufficient red light in fluorescent powder excitation technology.

Wavelength conversion elements formed from phosphors and dielectric interference particles dispersed in a host material, either in a single layer or in separate layers, are disclosed. Optical light conversion devices having such wavelength conversion elements, methods of making such wavelength conversion elements, and methods of using such wavelength conversion elements are also disclosed.

An information providing method includes: measuring a static object three-dimensionally in an environment, by a processor; sequentially measuring a position of a dynamic object in the environment, by the processor; transmitting measurement data of the static object measured to a predetermined information processing apparatus through a communication network; transmitting measurement data of the dynamic object measured to the information processing apparatus through a communication network; receiving support data rem the information processing apparatus based on an environment grasping image that is generated from the measurement data, of the static object and the measurement data of the dynamic object by the information processing apparatus; and presenting the received support data to the environment at predetermined timing, by the processor.

There is provided a low-cost lighting optical system not requiring the refractive element for each laser chip.

A lighting optical system includes: a light source including a plurality of multi-emitter laser chips arrayed in a first direction that intersects a light output direction, the plurality of multi-emitter laser chips each having a first emitter outputting first emitter light and a second emitter outputting second emitter light; a plurality of convex lenses each having a center between the first emitter and the second emitter of each of the multi-emitter laser chips, the plurality of convex lenses each arranged in close proximity to a corresponding one of the multi-emitter laser chips; and a first refractive element arranged on light output direction side with respect to the plurality of convex lenses, the first refractive element having a first surface receiving two or more first emitter lights output from the plurality of multi-emitter laser chips and a second surface receiving two or more second emitter lights output from the plurality of multi-emitter laser chips, the first refractive element turning the first emitter lights and the second emitter lights into approximately parallel lights.

There is provided a low-cost lighting optical system not requiring the refractive element for each laser chip.

A lighting optical system includes: a light source including a plurality of multi-emitter laser chips arrayed in a first direction that intersects a light output direction, the plurality of multi-emitter laser chips each having a first emitter outputting first emitter light and a second emitter outputting second emitter light; a plurality of convex lenses each having a center between the first emitter and the second emitter of each of the multi-emitter laser chips, the plurality of convex lenses each arranged in close proximity to a corresponding one of the multi-emitter laser chips; and a first refractive element arranged on light output direction side with respect to the plurality of convex lenses, the first refractive element having a first surface receiving two or more first emitter lights output from the plurality of multi-emitter laser chips and a second surface receiving two or more second emitter lights output from the plurality of multi-emitter laser chips, the first refractive element turning the first emitter lights and the second emitter lights into approximately parallel lights.

A laser beam (L50) generated by a laser light source (50) is reflected by a light beam scanning device (60) and irradiated onto a hologram recording medium (45). On the hologram recording medium (45), an image (35) of a scatter plate is recorded as a hologram by using reference light that converges on a scanning origin (B). The light beam scanning device (60) bends the laser beam (L50) at the scanning origin (B) and irradiates the laser beam onto the hologram recording medium (45). At this time, scanning is carried out by changing a bending mode of the laser beam with time so that an irradiation position of the bent laser beam (L60) on the hologram recording medium (45) changes with time. Regardless of an irradiation position of the beam, diffracted light (L45) from the hologram recording medium (45) produces a reproduction image (35) of the scatter plate on the spatial light modulator (200). The modulated image of the spatial light modulator (200) is projected onto a screen (400) by a projection optical system (300).

A laser beam (L50) generated by a laser light source (50) is reflected by a light beam scanning device (60) and irradiated onto a hologram recording medium (45). On the hologram recording medium (45), an image (35) of a scatter plate is recorded as a hologram by using reference light that converges on a scanning origin (B). The light beam scanning device (60) bends the laser beam (L50) at the scanning origin (B) and irradiates the laser beam onto the hologram recording medium (45). At this time, scanning is carried out by changing a bending mode of the laser beam with time so that an irradiation position of the bent laser beam (L60) on the hologram recording medium (45) changes with time. Regardless of an irradiation position of the beam, diffracted light (L45) from the hologram recording medium (45) produces a reproduction image (35) of the scatter plate on the spatial light modulator (200). The modulated image of the spatial light modulator (200) is projected onto a screen (400) by a projection optical system (300).

A projector includes a light source, a filter unit, an auxiliary light source and a combiner. The light source produces a first beam of light having light in a plurality of ranges of wavelengths, corresponding to a plurality of colors. The filter unit is positioned in the optical path of the first light beam. The filter unit is configured in a first configuration during a first time interval and in a second configuration during a second time interval. When the filter unit is configured in the second configuration, the auxiliary light source produces a second beam of light. The combiner combines the first beam of light and the second beam of light. The combined beams of light are directed to a spatial light modulator.

A projector includes a light source, a filter unit, an auxiliary light source and a combiner. The light source produces a first beam of light having light in a plurality of ranges of wavelengths, corresponding to a plurality of colors. The filter unit is positioned in the optical path of the first light beam. The filter unit is configured in a first configuration during a first time interval and in a second configuration during a second time interval. When the filter unit is configured in the second configuration, the auxiliary light source produces a second beam of light. The combiner combines the first beam of light and the second beam of light. The combined beams of light are directed to a spatial light modulator.