An apparatus for high dynamic range (HDR) modulation includes one or more lasers configured to transmit respective beams of laser light with a single color mode and a PLM optically coupled to the one or more lasers. The PLM is configured to modulate the laser light to produce a first modulated light. The apparatus also includes a phosphor optically coupled to the PLM and configured to receive at least a first portion of the first modulated light from the PLM and to emit a phosphor light with multiple color modes. At least one spatial light modulator (SLM) is also optically coupled to the phosphor and configured to modulate the multiple color modes in the phosphor light and the single color mode to project a second modulated light.

A control method of a spectroscopic imaging device including an imaging element and a spectral element, the control method includes causing the spectroscopic imaging device to generate a first measurement spectrum consisting of N1 wavelengths by imaging a target object by making output wavelengths of a spectral element different when the spectroscopic imaging device is in a high accuracy mode and causing the spectroscopic imaging device to generate a second measurement spectrum consisting of N2 wavelengths by imaging the target object by making the output wavelengths of the spectral element different when the spectroscopic imaging device is in a high speed mode, in which N1 is an integer greater than or equal to two, and N2 is an integer less than N1.

A color wheel according to an embodiment of the present invention comprises: a basic fluorescent body having a basic light-emitting wavelength; and at least one modified fluorescent body having at least one light-emitting wavelength different from the basic light-emitting wavelength, wherein the basic fluorescent body comprises Y.sub.3Al.sub.5O.sub.12 and the modified fluorescent body comprises Y.sub.3(Ga.sub.xAl.sub.(1-x)).sub.5O.sub.12:Ce in which gallium is doped on the basic fluorescent body

An image projection apparatus includes: a light source; an image display element including multiple micromirrors arranged in two dimensions, the multiple micromirrors forming an image display plane, each micromirror having a reflecting surface; and a projection optical system. Conditional expressions (1) and (2) below are satisfied:
θ1≥14(deg)  (1)
1.2<BF/L<2.2  (2) where θ1 is a maximum tilt angle of the reflecting surface of each micromirror with respect to the image display plane, L is a diagonal length of the image display plane, and BF is a distance between a vertex of a lens within the projection optical system and closest to the image display plane and the image display plane along an optical axis of the projection optical system.

A light source apparatus includes a light source, a light collection optical system configured to collect a pencil of light emitted from the light source using multiple lenses, a microlens array formed into a size corresponding to a collected light diameter of a pencil of light collected by the light collection optical system and caused to be incident thereon from the light collection optical system, and a display device on to which light transmitted through the microlens array to be superimposed together is incident.

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. The first light is focused by the first light focusing optical system and enters the wavelength conversion layer at least via the second surface thereof, and the second light enters the wavelength conversion layer via the first surface thereof.

An optical processing turntable and a projection device are provided. The optical processing turntable has a first mass center and a height. The optical processing turntable includes a substrate and a driving component. The substrate has a second mass center. The driving component is disposed on the substrate to drive the substrate to rotate. The driving component has a locking surface. A distance between the locking surface and one of the first mass center and the second mass center relatively far from the locking surface is less than or equal to ⅔ of the height. The invention can effectively reduce the vibration and noise of the optical processing turntable during high-speed operation, and can increase the operating life of the optical processing turntable.

An illumination system and a projection apparatus including the illumination system are provided with a rotatable light splitting module, wherein when a light splitting element rotates, a first laser beam forms a first color light through a reflecting region of the light splitting element and a light combining element during a first time period, a second laser beam passes through the light combining element to form a second color light during the second time period and the fourth time period, the first laser beam forms a third color light by the wavelength conversion module and the light combining element after passing through the transmitting region of the light splitting element during the third time period, and the first color light, the second color light and the third color light from the light combining element form an illumination beam.

A system and method for dynamically adjusting a color gamut of a display system, and a display system are provided. The display system includes a light source system and an imaging system. The light source system includes an excitation light source and a narrow-spectrum primary-light source. The imaging system includes a spatial light modulation device and the system for dynamically adjusting the color gamut. The excitation light source emits excitation light which is processed to output at least one broad-spectrum primary light. The narrow-spectrum primary light source outputs narrow-spectrum primary light. The narrow-spectrum primary light and the broad-spectrum primary light are combined and then output to the imaging system. The brightness of light emitted by the excitation light source and the narrow-spectrum primary light source is adjusted.

A light source module and a projection device are provided. The light source module is configured to provide a laser beam and includes multiple laser source units and a focusing lens. The laser source units include a first laser source unit, a second laser source unit, a third laser source unit and a fourth laser source unit respectively configured to provide a first laser beam, a second laser beam, a third laser beam and a fourth laser beam. The focusing lens is located on transmission paths of the first laser beam, the second laser beam, the third laser beam and the fourth laser beam. The first laser beam, the second laser beam, the third leaser beam and the fourth laser beam are respectively incident on the focusing lens along a first direction. The first laser source unit and the second laser source unit are arranged along a second direction.