Laser light source system for balancing laser service life and eliminating speckles for cinema

Abstract

The invention discloses a laser light source system for balancing laser service life and eliminating speckles for a cinema. The laser light source system comprises a plurality of laser light source modules (1), wherein the back surface of each laser light source module (1) is mounted on the cold surface of a semiconductor refrigerating sheet (8) in a laminated mode, and the hot surfaces of all semiconductor refrigerating sheets (8) are mounted at the cooling end of a heat dissipation circulating system in the laminated mode; each laser light source module (1) is integrated with a temperature sensor (2), each temperature sensor (2) is connected with a temperature control system (3), each temperature control system (3) is connected with a constant-current driving system (6), and each constant-current driving system (6) is connected with the corresponding semiconductor refrigerating sheet (8). According to the laser light source system, the temperature of the laser light source is accurately controlled by rapidly switching the working states of the semiconductor refrigerating sheets, so that laser output of different wavelengths is realized, and the speckle problem of laser imaging iseliminated.

Description

technical field [0001] The invention relates to the technical fields of laser light source application, laser light source heat dissipation, and laser speckle elimination, and specifically relates to a laser light source system for theaters that balances laser life and eliminates speckles. Background technique [0002] Laser display has occupied a dominant position in the theater industry in recent years. In order to reduce costs, theater displays have high requirements for the life of semiconductor lasers used (30,000 hours). "Speckle" caused by correlation. [0003] Due to the high coherence of laser light, when the light wave is reflected from the surface of the object, the vibration of each point on the object to the observation point at an appropriate distance is coherent. Therefore, the light field at the observation point is the superposition of coherent wavelets emitted by each point on the rough surface. Because the roughness is greater than the wavelength of the ...

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Problems solved by technology

However, this method needs to add a vibration motor to the imaging surface. The labor cost and maintenance cost of this method are very high, and it will also generate noise.

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