Abstract: A light source apparatus according to the present disclosure includes a first light source including a plurality of first light emitters arranged in a single row along a first direction, a second light source including a plurality of second light emitters arranged in a single row along a second direction, and a polarization combiner. The polarization combiner transmits the first luminous flux from the first light source and reflects the second luminous flux from the second light source. In an imaginary plane perpendicular to the center axis of the combined luminous flux, the direction in which the plurality of first beams are arranged in the single row and the direction in which the plurality of second beams are arranged in the single row intersect with each other, and the first luminous flux and the second luminous flux partially overlap with each other.

Abstract: A light source device according to the present disclosure includes a light source section, a first polarization split element for transmitting first light with a first polarization direction from the light source section and reflecting the first light with a second polarization direction, a second polarization split element for transmitting the first light with the first polarization direction from the first polarization split element, a reflecting element for reflecting the first light with the second polarization direction from the first polarization split element, an optical element for reflecting the first light with the second polarization direction from the reflecting element, a wavelength conversion element for performing wavelength conversion on the first light from the optical element to emit second light, and a diffusion element for diffusely emitting the first light from the second polarization split element.

Abstract: A light source device according to the present disclosure includes a light source unit configured to emit a first light beam, a second light beam, and a third light beam, a first polarization split element configured to transmit the first light beam and the second light beam and reflect the third light beam, a second polarization split element configured to transmit the first light beam and reflect the second light beam, a first retardation element, a first diffusion element configured to diffuse the third light beam, a second diffusion element configured to diffuse the second light beam, and a third diffusion element configured to diffuse the first light beam. The first retardation element converts a polarization direction of the second light beam from the first polarization split element, and converts a polarization direction of the another part of the second light beam from the second polarization split element.

Abstract: A projector according to the present disclosure includes a light source apparatus including a light source section including first, second, third, and fourth light emitters sequentially arranged in a row along a first direction that intersects a light exiting direction, a first optical section that shifts light outputted from the second light emitter in a second direction and shifts the light outputted from the second light emitter to a position adjacent to light outputted from the third light emitter, and a second optical section that shifts the light outputted from the third light emitter in the second direction and shifts the light outputted from the third light emitter to a position adjacent to the light outputted from the second light emitter; a light modulator that modulates light outputted from the light source apparatus; and a projection optical apparatus.

Abstract: Four of laser light source sections each includes a semiconductor laser. Any two of the laser light source sections are disposed in an imaginary plane perpendicular to the center axis of a luminous flux and on a first imaginary line that intersects with the center axis so as to face each other with the center axis sandwiched between the two laser light source sections, and other two of the laser light source sections are disposed on a second imaginary line perpendicular to the first imaginary line so as to face each other with the center axis sandwiched between the two laser light source sections. The laser light source sections are at the same distance from the center axis. The first light, the second light, the third light, and the fourth light are each linearly polarized light and have the same polarization direction.

Abstract: An illumination device includes a light emitting element emitting first light, wavelength conversion element converting the first light into second, first optical element, second optical element having a first area transmitting the second light, and second area transmitting part of the first light and reflecting another part, and third optical element having a third area transmitting the second light, and fourth area transmitting part of the first light and reflecting another part. The first area first light transmittance in the second optical element is higher than that in the second area, the second optical element position made switchable between first and second positions, the third area first light transmittance in the third optical element is higher than that in the fourth area, the third optical element position is made switchable between third and fourth positions, and the fourth area first light transmittance is different from that in the second area.

Abstract: A light source apparatus includes a light source, a wavelength conversion layer, a substrate, a first optical member having a first optical layer that transmits first light and reflects second light, second and third optical members having second and third optical layers that reflect the first light and the second light and intersect with the first optical layer, and a fourth optical layer reflects the first light and transmits the second light. The first optical member includes a fifth optical layer that transmits the first light polarized is a first direction. The first optical layer reflects part of the first light emitted from the wavelength conversion layer. First area of a light incident surface of the wavelength conversion layer is greater than second area of a light incident region of the light incident surface. The second area of the light incident region is greater than third area of an aperture.

Abstract: In a first period, an optical apparatus converts first light that exits out of a retardation film into light polarized in a first polarization direction and converts second light that exits out of the retardation film into light polarized in a second polarization direction, and in a second period, the optical apparatus converts the first light that exits out of the retardation film into light polarized in the second polarization direction and converts the second light that exits out of the retardation film into light polarized in the first polarization direction.

Abstract: The present disclosure relates to a projector including a light source apparatus that outputs a light ray flux containing fluorescence, a bandpass filter provided at least in part of an optical path of the fluorescence, an integrator unit on which the light ray flux is incident and which divides the light ray flux into a plurality of partial light ray fluxes, a superimposing lens that is provided on the downstream of the integrator unit and causes the plurality of partial light ray fluxes to be incident in different positions, a light modulator including a plurality of pixels, a microlens array including a plurality of microlenses corresponding to the plurality of pixels, and a projection optical apparatus that projects light outputted from the light modulator.

Abstract: A light source device according to the present disclosure includes a first light source section for emitting first light in a first wavelength band, a first polarization split element for transmitting the first light polarized in a first polarization direction and reflecting the first light polarized in a second polarization direction, a second polarization split element for reflecting the first light with the first polarization direction, a diffusion element for diffusing the first light from the first polarization split element, a wavelength conversion element for emitting second light in a second wavelength band, a second light source section for emitting third light in a third wavelength band, a first optical element for reflecting the third light, and a second optical element for separating the second light into fourth light in a fourth wavelength band and a fifth light in the third wavelength band.

Abstract: A wavelength conversion element includes a wavelength conversion layer having a light incident surface and converting a first light into a second light, a substrate having a support surface, a first optical member having a first optical layer transmitting the first light and reflect the second light, a second optical member having a second optical layer reflecting the second light and crossing the support surface and the first optical layer, a third optical member having a third optical layer reflecting the second light and facing the second optical layer. An opening is formed by the substrate and the first, second and third optical members. A first area of the light incident surface is larger than a second area of a light incident area. The second area is larger than a third area of the opening. The second light is emitted from the opening.

Abstract: A light source apparatus according to an aspect of the present disclosure includes a first light source section, a second light source section, a first polarization separator, a second polarization separator that reflects part of second light and transmits the other part of the second light, a first phase retarder which is disposed between the first polarization separator and the second polarization separator and on which the part of the second light reflected off the second polarization separator is incident, a wavelength conversion layer that converts the first light and the part of the second light into third light having a second wavelength band and outputs the third light toward the first polarization separator, and a first light focusing optical system disposed between the wavelength conversion layer and the first polarization separator. The wavelength conversion layer has a first surface via which the third light exits and a second surface that intersects with the first surface.

Abstract: A light source device according to the present disclosure includes a plurality of light emitting elements, a diffusion element which light beams including a plurality of beams emitted from the plurality of light emitting elements enter, and which diffuses the light beams, and an optical element configured to divide the light beams emitted from the plurality of light emitting elements into plurality of partial light beams, wherein the diffusion element has a plurality of diffusion areas disposed so as to correspond to the plurality of partial light beams obtained by the optical element dividing the light beams emitted from the plurality of light emitting elements.

Abstract: A light source apparatus according to an aspect of the present disclosure includes a light source section, a first polarization separator that transmits a first polarization component of first light and reflects a second polarization component of the first light, a second polarization separator that reflects the first polarization component, transmits a third polarization component of second light, and reflects a fourth polarization component of the second light, a diffuser that diffuses the second polarization component and causes the diffused second polarization component, and a wavelength converter that converts the wavelength of the first polarization component and causes the second light. The first polarization separator includes a first polarization separation layer and first bases. The second polarization separator includes a second polarization separation layer and second bases. At least one of the first bases and the second bases is made of quartz.

Abstract: A light source device of the present disclosure includes a light emitting device, a first optical element having a first area and a second area, a second optical element converting a first light output from the first area into a second light, a diffuser element into which the second light is entered, and a wavelength conversion element into which the first light output from the second area is entered. The light output from the diffuser element and entered into the second optical element is converted into a third light, the third light output from the second optical element and entered into the first area is output from the first area, the light output from the diffuser element and entered into the second area is output from the second area, and a fourth light is output through the first area and the second area.

Abstract: A light source device of the present disclosure includes a light emitting device that outputs a first light having a first wavelength in a first polarization direction, a first optical element having a first area and a second area, a second optical element into which the first light reflected by the first area is entered, converting the first light into a circularly-polarized second light having the first wavelength, and a diffuser element into which the second light is entered. The second light entering the second optical element is converted into a third light having the first wavelength in a second polarization direction, the third light is transmitted through the first area, the second light is transmitted through the second area, and a fourth light output from the diffuser element and entered into the first area and the second area is transmitted through the first area and the second area.

Abstract: A controller corrects a spectrum S (?) detected at a wavelength ? of signal light to S? (?) in accordance with expressions below: I(?)=(I2?I1)×(???1)/(?2??1)?I1, and S?(?)=S(?)?I(?), where I1 is the intensity of infrared light detected at a wavelength ?1 of reference light and I2 is the intensity of infrared light detected at a wavelength ?2 of correction light.

Abstract: A light source apparatus according to an aspect of the present disclosure includes a light source section, a first polarization separator that transmits a first polarization component of first light and reflects a second polarization component of the first light, a second polarization separator that reflects the first polarization component, transmits a third polarization component of second light, and reflects a fourth polarization component of the second light, a diffuser that diffuses the second polarization component and causes the diffused second polarization component, a wavelength converter that converts the wavelength of the first polarization component and causes the second light, and a first phase retarder that is provided in the optical path of the first light between the first polarization separator and the second polarization separator and converts the first polarization component of the first light into the second polarization component.

Abstract: A light source device according to the present disclosure includes a light source section, a first polarization split element for transmitting first light with a first polarization direction from the light source section and reflecting the first light with a second polarization direction, a first retardation element, a second polarization split element for reflecting the first light in the second polarization direction from the first retardation element, a second retardation element, and a light conversion device having a diffusion element for diffusing the first light from the second retardation element, a first wavelength conversion element for performing wavelength conversion on the first light to emit second light, and a substrate.

Abstract: A semiconductor optical modulator includes a modulation region and a non-modulation region. A first width of a first ground electrode in the non-modulation region is larger than a second width of the first ground electrode in the modulation region. A third width of a second ground electrode in the non-modulation region is larger than a fourth width of the second ground electrode in the modulation region. In the non-modulation region, a first insulating layer is disposed between a first optical waveguide and a first traveling wave electrode and between a second optical waveguide and a second traveling wave electrode. For this reason, a bandwidth of the semiconductor optical modulator can be widened.