A laser light source (300), a wavelength conversion light source, a light combining light source, and a projection system. The laser light source comprises a laser element array, a focusing optical element (33), a collimation optical element (34), an integrator rod (36) for receiving and homogenizing a secondary laser beam array (382), an angular distribution control element (35) disposed on the light path between the laser element array and the integrator rod (36) for enlarging the divergence angle of the laser beam array (382) in the direction of the short axis of the light distribution, such that the rate between the divergence angle of each of the secondary laser beam that enters the integrator rod (36) in the direction of the short axis of the light distribution and the divergence angle in the direction of the long axis is greater than or equal to 0.7.

An optical device is provided including a light-imaging component configured to focus light fed to the light-imaging component in at least one focusing spot, wherein the light fed includes at least one predefinable wavelength; and a conversion apparatus including at least one phosphor which is designed to convert light having the at least one predefinable wavelength into conversion light, wherein the conversion apparatus is arranged in such a way that the at least one phosphor is arranged in the focusing spot of the light-imaging component. The light-imaging component is configured to generate at least two focusing spots, and the conversion apparatus is arranged in such a way that the at least two focusing spots are positioned on the at least one phosphor.

Projection systems and/or methods for efficient use of light by recycling a portion of the light energy for future use are disclosed. In one embodiment, a projection display system is disclosed comprising a light source; an integrating rod that receives light from said light source at a proximal end that comprise a reflective surface which may reflecting/recycle light down said integrating rod; of reflecting light down said integrating rod; a relay optical system, said relay optical system further comprising optical elements that are capable of moving the focal plane of the projector display system; and a modulator comprising at least one moveable mirror that reflects light received from the integrating rod in either a projection direction or a light recycling direction.

Provided is a wavelength conversion member including a ceramic layer as a reflective layer and having excellent luminescence intensity and a light emitting device using the same. A wavelength conversion member 10 including: a first porous ceramic layer 1 having a porosity of 20% by volume or more; and a phosphor layer 2 formed on a principal surface 1a of the first porous ceramic layer 1.

A laser light source (300), a wavelength conversion light source, a light combining light source, and a projection system. The laser light source comprises a laser element array, a focusing optical element (33), a collimation optical element (34), an integrator rod (36) for receiving and homogenizing a secondary laser beam array (382), an angular distribution control element (35) disposed on the light path between the laser element array and the integrator rod (36) for enlarging the divergence angle of the laser beam array (382) in the direction of the short axis of the light distribution, such that the rate between the divergence angle of each of the secondary laser beam that enters the integrator rod (36) in the direction of the short axis of the light distribution and the divergence angle in the direction of the long axis is greater than or equal to 0.7.

A cooling device includes a thermally conductive housing member that houses a heat generating body, a first air blower that generates first cooling wind flowing along the housing member through the heat generating body inside the housing member, and a second air blower that generates second cooling wind flowing along the housing member outside the housing member.

A wavelength conversion module including a substrate, a wavelength conversion layer and at least one wing is provided. The substrate has a wavelength conversion area, a non-wavelength conversion area and at least one through hole. The through hole penetrates through the substrate and is located in the non-wavelength conversion area. The wavelength conversion layer is disposed in the wavelength conversion area of the substrate. The wing is disposed in the non-wavelength conversion area of the substrate. When the substrate reaches a first temperature range, the wing closes the through hole. When the substrate reaches a second temperature range, at least one airflow channel is formed between the wing and the through hole. The wavelength conversion module of the invention and the projection device using the same effectively reduce a temperature of the wavelength conversion module, and thus have better reliability.

A ceramic composite contains inorganic materials and includes a phosphor phase including YAG containing Ce, and a scatterer phase including a translucent ceramic, in which the phosphor phase is contained in an amount of 90 vol % or more and 99 vol % or less, and the scatterer phase is contained in an amount of 1 vol % or more and 10 vol % or less.

A wavelength conversion module and a projector including the wavelength conversion module are provided. The wavelength conversion module includes a substrate and a wavelength conversion layer. The substrate has a first surface and a second surface opposite to each other. The substrate includes a plurality of turbulent portions, and the turbulent portions are recessed in at least one of the first surface and the second surface. The wavelength conversion layer is disposed on the first surface of the substrate, and a distribution area of the turbulent portions accounts for more than 60% of an exposure area of the substrate. The wavelength conversion module and the projector provided by the disclosure exhibit favorable heat dissipation efficiency.

An illumination system and a projection device are provided. The illumination system includes a laser light source, a light splitting element, a wavelength conversion module, a filter module, and a homogenizing element. The laser light source provides a laser beam to the light splitting element. The filter module rotates around a rotation axis and has multiple dichroic filter regions on a surface perpendicular to the rotation axis. The filter module receives the laser beam from the light splitting element, and an acute angle is formed between the rotation axis and a direction in which the laser beam enters the filter module. The homogenizing element is located on a transmission path of the laser beam penetrating the filter module, and the laser beam enters the homogenizing element along a long axis direction of the homogenizing element.