264 results about "Blue laser light" patented technology

A method and device for emitting electromagnetic radiation at high power using nonpolar or semipolar gallium containing substrates such as GaN, AN, InN, InGaN, AlGaN, and AlInGaN, is provided. In various embodiments, the laser device includes plural laser emitters emitting green or blue laser light, integrated a substrate.

A 2-dimensional beam scan unit (2) reflects emission beams from a red laser light source (1a), a green laser light source (1b) and a blue laser light source (1c) and scans in a 2-dimensional direction. Diffusion plates (3a, 3b, 3c) diffuse the respective light beams scanned in the 2-dimensional direction to introduce them to corresponding spatial light modulation elements (5a, 5b, 5c). The respective spatial light modulation elements (5a, 5b, 5c) modulate the respective lights in accordance with video signals of the respective colors. A dichroic prism (6) multiplexes the lights of the three colors after the modulation and introduces the multiplexed lights to a projection lens (7) so that a color image is displayed on a screen (8). Since the 2-dimensional light emitted from the beam scan unit is diffused to illuminate the spatial light modulation element, it is possible to change the optical axis of the beam emerging from the light diffusion member for irradiating the spatial light modulation element moment by moment, thereby effectively suppressing speckle noise.

An illuminating apparatus includes a first light source that emits blue laser light, a light emitting section that emits light by being irradiated with the blue laser light, a second light source that emits green laser light, a biaxial MEMS scanner that irradiates a part of the light emitting section with the green laser light, and a convex lens that projects the light emitted from the light emitting section to the outside.

A solid-state light source unit emits excitation light. Fluorescent material layer is formed on each side of a glass substrate of a fluorescent plate so as to interpose a reflective film therebetween. The first optical system optically guides, to a rod integrator, red and blue LED light, and green fluorescence that is generated by excitation occurring when blue laser light emitted from the solid-state light source unit is applied to the fluorescent material layer on one surface of the fluorescent plate, and that is emitted in the −X direction. The second optical system optically guides, to the rod integrator, red and blue LED light, and green fluorescence that is generated by excitation occurring when blue laser light emitted from the solid-state light source unit is applied to the fluorescent material layer on the other surface of the fluorescent plate, and that is emitted in the +X direction.

The invention discloses a double-color laser light source which comprises a blue laser and a red laser which emit blue laser light and red laser light respectively; and a fluorescent wheel, the surface of which is coated with green fluorescent powders, wherein the green fluorescent powders emit green fluorescence when excited by the blue laser light. The double-color laser light source also comprises a speckle dissipation system. The speckle dissipation system comprises a first diffusion portion which is controlled to rotate, is arranged in a beam shaping optical path of the blue laser light and red laser light and is used for diffusing the blue laser light and the red laser light; and a second diffusion portion which is controlled to rotate, is arranged before a blue laser light, red laser light and green fluorescence incident light bar, and is used for at least penetrating the blue laser light and the red laser light sequentially and forming blue light and red light output. The double-color laser light source can effectively reduce speckle effect and improve display quality of projected images.

A method and device for emitting electromagnetic radiation at high power using nonpolar or semipolar gallium containing substrates such as GaN, AlN, InN, InGaN, AlGaN, and AlInGaN, is provided. In various embodiments, the laser device includes plural laser emitters emitting green or blue laser light, integrated a substrate.

An apparatus, method and associated fiber-laser architectures for high-power pulsed operation and pumping wavelength-conversion devices. Some embodiments generate blue laser light by frequency quadrupling infrared (IR) light from Tm-doped gain fiber using non-linear wavelength conversion. Some embodiments use a fiber MOPA configuration to amplify a seed signal from a semiconductor laser or ring fiber laser. Some embodiments use the frequency-quadrupled blue light for underwater communications, imaging, and/or object and anomaly detection. Some embodiments amplitude modulate the IR seed signal to encode communication data sent to or from a submarine once the modulated light has its wavelength quartered. Other embodiments transmit blue-light pulses in a scanned pattern and detect scattered light to measure distances to objects in a raster-scanned underwater volume, which in turn are used to generate a data structure representing a three-dimensional rendition of the underwater scene being imaged for viewing by a person or for other software analysis.

The invention relates to light sources and displays incorporating blue laser pumped light sources that provide green light. According to a first aspect of the invention, a green light source includes a semiconductor diode laser emitting light in an optical path having a dominant wavelength within the blue spectral region, a substrate positioned in the optical path of the semiconductor diode laser, and a material coupled to the substrate. The material is selected to absorb light emitted by the semiconductor diode laser and, in response, to emit light having a dominant wavelength within the green spectral region. According to a second aspect of the invention, an apparatus includes a lighting module for a display, the lighting module includes an array of red laser light sources, an array of blue laser light sources, and an array of green light sources according to the first aspect of the invention.

Red, green, and blue laser light emitted from laser light sources 1-3 is transformed into substantially parallel beams by collimator lenses 4-6, collected by microlens arrays 7-9, and rendered uniform by rod integrators 10-12, whereupon it is used to illuminate spatial light modulation elements 16-18 and subjected to modulation. The modulated laser light exiting from the spatial light modulation elements 16-18 is recombined using a beam-combining prism 19 and subjected to pixel separation using a birefringent plate 20, which is rotationally driven by a birefringent plate rotary drive unit 26, after which it is projected upon a screen 22 using a projection optical system 21. The birefringent plate 20 spatially separates the modulated laser light using birefringence. When pixels are spatially separated by the birefringent plate, the pixel grid region is made smaller, the distribution of brightness on the screen is rendered uniform, and speckle noise is reduced.

A projector is provided which includes a light source unit which can reduce the numbers of lenses and mirrors and which can control quantity of light of each color.

A light source unit of the invention includes a laser light source unit 70 which has a plurality of red laser elements 71R and a plurality of blue laser elements 71B as two types of laser emitting elements 71 which emit light of wavelength bands which are different from each other and in which the pluralities of red and blue laser emitting elements 71R, 71B are arranged in a planar fashion, a diffusing unit which is disposed on an optical path of light emitted from the laser light source unit 70 to diffuse the light emitted from the laser light source unit 70, and a light source control unit for controlling the illumination of the laser emitting elements 71R, 71B.

The invention discloses a double-color laser light source which comprises a blue laser and a red laser which emit blue laser light and red laser light respectively; and a fluorescent wheel, the surface of which is coated with green fluorescent powders, wherein the green fluorescent powders emit green fluorescence when excited by the blue laser light. The double-color laser light source also comprises a speckle dissipation system. The speckle dissipation system comprises a first diffusion portion which is fixedly arranged in a beam shaping optical path of the blue laser light and red laser light and is used for diffusing the blue laser light and the red laser light; and a second diffusion portion which is controlled to rotate, is arranged before a blue laser light, red laser light and green fluorescence incident light bar, and is used for at least penetrating the blue laser light and the red laser light sequentially and forming blue light and red light output. The double-color laser light source can effectively reduce speckle effect and improve display quality of projected images.

A microprojector comprising an illumination optical system, including light sources for green, red and blue laser light beams, first through third focusing lenses arranged in the optical path of the light beams, first through third mirrors diverting the light beams to a rear side of the microprojector, a reflection mirror diverting the light beams upward, a unifying unit, and a polarizing beam splitter; an image display panel reflecting the linearly polarized green, red and blue light beams in the opposite direction to the incident direction as well as selectively rotating the polarization of linearly polarized green, red and blue light beams in accordance with an externally input image signal; and a projection optical system having a plurality of lenses linearly arranged to project the light beams, thereby forming an image onto an external surface. The microprojector includes components arranged in such a way that they occupy a relatively small space.

The invention discloses a laser light source. The laser light source comprises a blue laser device and a red laser device which respectively emit blue laser light and red laser light, and further comprises a fluorescence wheel which is excited to emit green fluorescence, wherein a first diffusion part and a second diffusion part are arranged on a transmission light path of the at least one color laser light, the first diffusion part and the second diffusion part are respectively driven to do motion, motion tracks are different, the space position scope with phase change increases when laser beams sequentially pass through the two diffusion parts, the probability that correlation degrees among phases after change are relatively low increases, the quantity of random phase patterns can be greatly improved, the eye integration effect is utilized to alleviate the speckle removal effect, so the relatively good speckle purpose is realized. The invention further discloses laser projection equipment equipped with the laser light source.

Plant laser lighting fluorescent glass-ceramics is composed of 5-30wt% of red fluorescent powder and the balance of a glass matrix; the red fluorescent powder emits 660nm wide spectrum deep red light under excitation of a blue laser light source, the full width at half maximum is wider than 60nm; and red fluorescent powder crystalline grains are uniformly embedded in the glass matrix. The advantages of the plant laser lighting fluorescent glass-ceramics are that: the fluorescent glass-ceramics emits high brightness 660nm wide spectrum red light under excitation of a blue semiconductor laser, partly-transmitted-out blue laser and the red light emitted by the fluorescent glass-ceramics are matched with effective spectrum of plant photosynthesis, at the same time, the plant laser lighting fluorescent glass-ceramics can obtain a high brightness plant laser lighting source under excitation of high energy density laser, and has potential application in the fields such as a plant factory, vertical planting, a greenhouse, a glass cultivation room, and the like.

An optical device comprising a photorefractive composition configured to be photorefractive upon irradiation by a blue laser. The photorefractive composition comprises a polymer comprising a repeating unit including at least a moiety selected from the group consisting of the formulas (Ia), (Ib) and (Ic), as defined herein.

The invention discloses an illuminating light source device and a sampling and controlling method. The illuminating light source device comprises a laser component, a coupling mirror and a single-core light-guide fiber. The laser component is used for emitting mixed light including red laser light, green laser light, blue laser light and yellow laser light, output intensity of the laser light can be adjusted, and accordingly the color of illuminating light can be adjusted; the coupling mirror is located on a light path of the mixed light and is used for refracting and collecting the mixed light; and one end of the single-core light-guide fiber is located at a focus of the coupling mirror while the other end of the single-core light-guide fiber is used for being connected with an endoscope or an inner mirror. The illuminating light source device not only has the illuminating intensity identical to that of a xenon lamp or a halogen lamp, but also can be prevented from generating high heat due to the fact that the light is mixed with infrared rays or ultraviolet rays. In addition, the mixed illuminating light is transmitted to the endoscope or the inner mirror via the single-core light-guide fiber, and furthermore, the single-core light-guide fiber is small in volume and convenient in use, and is soft.

A tablet computer with a separate miniature laser projection device. The tablet replaces a traditional LCD screen with a separate miniature laser projection unit. The separated miniature laser projection device includes a laser light source module, a control circuit, a miniature scanning device, a connecting rod, an optical fiber and an auxiliary optical system. The laser light source module and the control circuit are separated from the micro scanning device. The laser light source module and the control circuit are integrated inside the tablet computer; the micro-scanning device is located outside the tablet computer and connected with the tablet computer through a rotatable mechanical link. The red, green and blue laser light generated by the laser light source module is transmitted to the micro-scanning device through an optical fiber and projected into a two-dimensional image. The invention has the advantages of small size, light weight, wide color gamut, high contrast, large visual range and the like.

The present invention provides a polymerizable liquid crystal compound having an excellent durability against blue laser light and having a small refractive index and small light absorption, a liquid crystal composition containing the compound, and an optical anisotropic material using the liquid crystal composition.

The polymerizable liquid crystal compound represented by the following formula (1), provided that R¹ is a hydrogen atom or a methyl group, Cy is a trans-1,4-cyclohexylene group, X¹ is a 1,4-phenylene group or a trans-1,4-cyclohexlyene group, and R² is a C_1-8 alkyl group. The above 1,4-phenylene group and the trans-1,4-cyclohexylene group may be such that a hydrogen atom bonded to a carbon atom in each group may be substituted by a fluorine atom, a chlorine atom or a methyl group.