Abstract: A projection device includes an optical lens and a light source. The optical lens has an incident surface of light, a reflecting surface that has a concave curved surface and internally reflects light that has entered through the incident surface, and an exit surface of light that has been reflected by the reflecting surface. The light source that emits light that enters the optical lens.

Abstract: A projection device includes an optical lens and a light source. The optical lens has an incident surface of light, a reflecting surface that has a concave curved surface and internally reflects light that has entered through the incident surface, and an exit surface of light that has been reflected by the reflecting surface. The light source that emits light that enters the optical lens.

Abstract: A light source device includes a first polarization beam splitter and a dichroic mirror. The first polarization beam splitter has a first optical surface that separates light incident on the first optical surface into light beams having different polarization directions from each other. The dichroic mirror has a second optical surface. The second optical surface intersects the first optical surface and guides reflection light reflected by a fluorescent emitter and fluorescence in different directions from each other. The reflection light is part of incident light that has been emitted by a first light source and incident on the fluorescent emitter via the first optical surface. The fluorescence is emitted by the fluorescent emitter in response to the incident light.

Abstract: A light source unit of the present invention includes a first light source and a second light source that are configure to emit light in a first wavelength range, a luminescent plate configured to be excited by the light in a first wavelength range to emit light in a second wavelength range, and a dichroic filter provided on one surface side of the luminescent plate and configured to transmit the light in a second wavelength, and the light in a first wavelength range emitted from the first light source is incident on the dichroic filter at an angle within a first incident angle range, and the light in a first wavelength range emitted from the second light source is incident on the dichroic filter at an angle within a second incident angle range that is greater than the first incident angle range.

Abstract: A projection device includes an optical lens and a light source. The optical lens has an incident surface of light, a reflecting surface that has a concave curved surface and internally reflects light that has entered through the incident surface, and an exit surface of light that has been reflected by the reflecting surface. The light source that emits light that enters the optical lens.

Abstract: A light source unit includes a first light emitting device configured to emit light in a first wavelength range, a luminescent wheel comprising a luminescent light emitting area configured to emit luminescent light that is excited by the light in the first wavelength range as light in a second wavelength range, and a color wheel onto which the light in the first wavelength range and the light in the second wavelength range are shined. A filter selects a part of the wavelength from the shined light in the first wavelength range and the light in the second wavelength range. A wheel surface of the color wheel is inclined with respect to axes of the light in the first wavelength range and the light in the second wavelength range.

Abstract: A projection device includes an optical lens and a light source. The optical lens has an incident surface of light, a reflecting surface that has a concave curved surface and internally reflects light that has entered through the incident surface, and an exit surface of light that has been reflected by the reflecting surface. The light source that emits light that enters the optical lens.

Abstract: A light source unit includes a first light emitting device configured to emit light in a first wavelength range, a luminescent wheel comprising a luminescent light emitting area configured to emit luminescent light that is excited by the light in the first wavelength range as light in a second wavelength range, and a color wheel onto which the light in the first wavelength range and the light in the second wavelength range are shined. A filter selects a part of the wavelength from the shined light in the first wavelength range and the light in the second wavelength range. A wheel surface of the color wheel is inclined with respect to axes of the light in the first wavelength range and the light in the second wavelength range.

Abstract: A light source unit of the present invention includes a first light source and a second light source that are configure to emit light in a first wavelength range, a luminescent plate configured to be excited by the light in a first wavelength range to emit light in a second wavelength range, and a dichroic filter provided on one surface side of the luminescent plate and configured to transmit the light in a second wavelength, and the light in a first wavelength range emitted from the first light source is incident on the dichroic filter at an angle within a first incident angle range, and the light in a first wavelength range emitted from the second light source is incident on the dichroic filter at an angle within a second incident angle range that is greater than the first incident angle range.

Abstract: A light source unit of the present invention includes a first light source and a second light source that are configure to emit light in a first wavelength range, a luminescent plate configured to be excited by the light in a first wavelength range to emit light in a second wavelength range, and a dichroic filter provided on one surface side of the luminescent plate and configured to transmit the light in a second wavelength, and the light in a first wavelength range emitted from the first light source is incident on the dichroic filter at an angle within a first incident angle range, and the light in a first wavelength range emitted from the second light source is incident on the dichroic filter at an angle within a second incident angle range that is greater than the first incident angle range.

Abstract: A light source unit includes a first device emitting light in a first wavelength range, a luminescent wheel comprising a luminescent light emitting area emitting luminescent light as light in a second wavelength range, a second device emitting light in a third wavelength range distributed on a longer wavelength side than the light in the second wavelength range, a device combining the light in the second and third wavelength ranges to the same light axis, a color wheel comprising a plurality of areas, one of them constituting an area for selecting the light in the third wavelength range and partial light on a long wavelength side of the light in the second wavelength range combined by the combining device as light in a fourth wavelength range, and a control unit controlling the elements described above to time-sharing control the light in the second and fourth wavelength ranges.

Abstract: A projection device includes an optical lens and a light source. The optical lens has an incident surface of light, a reflecting surface that has a concave curved surface and internally reflects light that has entered through the incident surface, and an exit surface of light that has been reflected by the reflecting surface. The light source that emits light that enters the optical lens.

Abstract: A light source unit includes a first device emitting light in a first wavelength range, a luminescent wheel comprising a luminescent light emitting area emitting luminescent light as light in a second wavelength range, a second device emitting light in a third wavelength range distributed on a longer wavelength side than the light in the second wavelength range, a device combining the light in the second and third wavelength ranges to the same light axis, a color wheel comprising a plurality of areas, one of them constituting an area for selecting the light in the third wavelength range and partial light on a long wavelength side of the light in the second wavelength range combined by the combining device as light in a fourth wavelength range, and a control unit controlling the elements described above to time-sharing control the light in the second and fourth wavelength ranges.

Abstract: A light source unit of the present invention includes a first light source and a second light source that are configure to emit light in a first wavelength range, a luminescent plate configured to be excited by the light in a first wavelength range to emit light in a second wavelength range, and a dichroic filter provided on one surface side of the luminescent plate and configured to transmit the light in a second wavelength, and the light in a first wavelength range emitted from the first light source is incident on the dichroic filter at an angle within a first incident angle range, and the light in a first wavelength range emitted from the second light source is incident on the dichroic filter at an angle within a second incident angle range that is greater than the first incident angle range.

Abstract: A light source unit according to an aspect of the invention includes a first semiconductor light emitting device disposed centrally and a second semiconductor light emitting device disposed outwards of the first semiconductor light emitting device, the first and second semiconductor light emitting devices emitting lights, and a first collimator lens disposed centrally and a second collimator lens disposed outwards of the first collimator lens, the first and second collimator lenses being disposed so as to correspond to the first and second semiconductor light emitting devices, respectively, on sides of the first and second semiconductor light emitting devices from which the lights are emitted, and a degree at which the light of the first semiconductor light emitting device is collected onto an illuminated surface differs from a degree at which the light of the second semiconductor light emitting device is collected onto the illuminated surface.

Abstract: A light source unit according to an aspect of the invention includes a first semiconductor light emitting device disposed centrally and a second semiconductor light emitting device disposed outwards of the first semiconductor light emitting device, the first and second semiconductor light emitting devices emitting lights, and a first collimator lens disposed centrally and a second collimator lens disposed outwards of the first collimator lens, the first and second collimator lenses being disposed so as to correspond to the first and second semiconductor light emitting devices, respectively, on sides of the first and second semiconductor light emitting devices from which the lights are emitted, and a degree at which the light of the first semiconductor light emitting device is collected onto an illuminated surface differs from a degree at which the light of the second semiconductor light emitting device is collected onto the illuminated surface.

Abstract: A light source unit according to an aspect of the invention includes a first semiconductor light emitting device disposed centrally and a second semiconductor light emitting device disposed outwards of the first semiconductor light emitting device, the first and second semiconductor light emitting devices emitting lights, and a first collimator lens disposed centrally and a second collimator lens disposed outwards of the first collimator lens, the first and second collimator lenses being disposed so as to correspond to the first and second semiconductor light emitting devices, respectively, on sides of the first and second semiconductor light emitting devices from which the lights are emitted, and a degree at which the light of the first semiconductor light emitting device is collected onto an illuminated surface differs from a degree at which the light of the second semiconductor light emitting device is collected onto the illuminated surface.

Abstract: A light source unit according to an aspect of the invention includes a first semiconductor light emitting device disposed centrally and a second semiconductor light emitting device disposed outwards of the first semiconductor light emitting device, the first and second semiconductor light emitting devices emitting lights, and a first collimator lens disposed centrally and a second collimator lens disposed outwards of the first collimator lens, the first and second collimator lenses being disposed so as to correspond to the first and second semiconductor light emitting devices, respectively, on sides of the first and second semiconductor light emitting devices from which the lights are emitted, and a degree at which the light of the first semiconductor light emitting device is collected onto an illuminated surface differs from a degree at which the light of the second semiconductor light emitting device is collected onto the illuminated surface.

Abstract: A small light source unit is provided which emits lights of the primary colors which are highly bright and which have a high color reproducibility and excitation light, and the light source unit includes a light source module and a light source control module and the light source module has a first light source which emits light having a first wavelength which is used as excitation light which excites a luminescent material, and a second light source which emits light having a second wavelength which is different from the first wavelength but which falls within a range of wavelengths of light of a similar color to that of the light of the first light source, and the light source control module controls individually the illumination of the first light source and the second light source.