Particular embodiments disclosed herein provide a surgical laser system comprising first laser source configured to emit a first laser beam with a first wavelength and a second laser source configured to emit a second laser beam with a second wavelength. The surgical laser system further comprises a first diffraction optical element (DOE) tuned to the first wavelength and a second DOE tuned to the second wavelength, wherein the first DOE is configured to diffract the first laser beam into one or more first diffracted beams at a diffraction angle and the second DOE is configured to diffract the second laser beam into one or more second diffracted beams at the same diffraction angle. The surgical laser system further comprises one or more beam splitters configured to reflect the one or more first diffracted beams and the one or more second diffracted beams onto a lens.

An optical module includes a first semiconductor light-emitting element, a second semiconductor light-emitting element, a first lens, a second lens, a filter that multiplexes the first light and the second light, a base plate that has a first surface on which the first semiconductor light-emitting element, the second semiconductor light-emitting element, the first lens, the second lens, and the filter are mounted and a second surface opposite the first surface in a thickness direction, and a support base that is in contact with a part of the second surface and that supports the base plate. The base plate has a filter mounting region in which the filter is mounted. The optical module has a gap between a region of the second surface corresponding to the filter mounting region and the support base.

An illumination system including an excitation light source, a first light splitting element, a wavelength conversion element, a second light splitting element, a third light splitting element and a fourth light splitting element is provided. The excitation light source provides a light beam. The first light splitting element allows the light beam to pass through to generate a first light beam or reflects it to generate a second light beam. The wavelength conversion element is located on a light path of the first light beam. The second light splitting element allows the first light beam to pass through to be transmitted to the wavelength conversion element to generate a third light beam and reflects the third light beam. The third light splitting element reflects the second light beam. The fourth light splitting element allows the second light beam to pass through and reflects the third light beam.

A light source device includes a laser optical system, a fluorescence optical system, and a light combiner combining first and second outgoing lights from the laser optical system and the fluorescent optical system. The laser optical system includes first laser optical sources emitting a plurality of outgoing lights respectively, the plurality of outgoing lights being blue, green, and red lights, or blue and red lights; a first dichroic mirror combining the plurality of outgoing lights from the first laser optical sources, and a diffusion plate reducing speckle noise and an uneven luminance of each of the plurality of outgoing lights. The fluorescence optical system includes a second laser light source, and a phosphor plate emitting, as the second outgoing light, a fluorescent light containing green and red lights by being excited by an outgoing light from the second laser light source. The light combiner includes a second dichroic mirror.

An illumination apparatus includes first and second laser light source units, each of which is configured by juxtaposing a plurality of laser light sources in an array, and which are provided to oppose each other. The illumination apparatus further includes first and second reflecting members. The second reflecting member has a first gap and is divided into first and second reflecting portions, and the first reflecting member is disposed so as to pass through the first gap. A second outgoing light beam transmitted through a transmitting region of the first reflecting member and a fourth outgoing light beam transmitted through a transmitting region of the second reflecting member are reflected in an output light direction by a reflecting region of the second reflecting member and a reflecting region of the first reflecting member, respectively.

A light source device includes: first and second light source elements which respectively generate blue and red lights; a first phase difference plate which controls a polarization component of the blue light; a first light combiner which combines the blue and the red lights, the blue light entering from the first phase difference plate; a second light combiner which the blue and the red light enter and which divides the blue light into first and second polarization components; a phosphor plate which generates yellow light by being excited by the first polarization component; and a second phase difference plate which controls polarization of the second polarization component and the red light. The second polarization component and the red light enter a reflective plate from the second phase difference plate, are reflected, enter the second light combiner again via the second phase difference plate, and are combined with the yellow light.

An illumination system includes a phosphor to emit light in a wavelength band .sub.PHOSPHOR, a second light source to emit light at a second wavelength .sub.2 within an absorption band of the phosphor, a third light source to emit light at a third wavelength .sub.3 and a fourth light source to emit light at a fourth wavelength .sub.4. A controller drives the second, third and fourth light sources. A first dichroic optical element: 1) directs light from the phosphor to an optical output of the system, 2) directs light from the third light source to the optical output, and 3) directs light from the fourth light source to the optical output. A second dichroic optical element: 1) directs light from the third light source to the first dichroic optical element, and 2) directs the light from the fourth light source to the first dichroic optical element.

Projector display systems comprising a light dimmer and first modulator are disclosed. The light dimmer may comprise an adjustable iris, adjustable light sources and/or LCD stack that is capable of lowering the luminance of the light source illuminated the first modulator. The first modulator may comprise a plurality of analog mirrors (e.g. MEMS array) and the second modulator may comprise a plurality of mirrors (e.g., DMD array). The display system may further comprise a controller that sends control signals to the light dimmer and first modulator. The display system may render a desired dynamic range for rendering a projected image by a combination of such control signals.

Systems and techniques are described for compressing strings by using a tree data structure. Specifically, for each string in a sequence of strings, the embodiments can traverse the tree data structure by matching characters of the string with characters associated with nodes of the tree data structure until either (1) all characters in the string have been processed, or (2) a current character in the string does not match a corresponding character in a current node of the tree data structure. Next, a first node identifier associated with the current node can be returned if all characters have been processed. Otherwise, a new node can be created in the tree data structure to store the remaining characters in the string, and a second node identifier associated with the new node in the tree data structure can be returned.

An imaging system and a projection device are provided. The imaging system includes a first reflective display, a second reflective display, and a light combining element. The first reflective display is configured to provide a first image beam. The second reflective display has the same pixel configuration as the first reflective display, and the second reflective display is configured to provide a second image beam. The light combining element is disposed on transmission paths of the first image beam and the second image beam. The light combining element has a light combining surface, and positions of the first image beam and the second image beam reflected on the light combining surface by pixels in corresponding positions in the first reflective display and the second reflective display are dislocation. The invention maintains good reliability while improving resolution of an image screen.