A fluorescent excitation device, projection light source and projection equipment

Abstract

The invention discloses a fluorescence excitation device comprising a laser light source used for emitting a laser light beam; the laser light beam penetrates a reflective optically focused unit and enters to a fluorescence crystal through a photoconductive tube, thus exciting the fluorescence crystal to illuminate; the fluorescence emitted by the fluorescence crystal is reflected to the reflective optically focused unit through a reflection part, and collimated and reflected to a deformation reflector; the deformation reflector is controlled by a drive part so as to have surface formation, thus diversifying transmission angles of the reflected light beam, and uniforming the light beam light spot distribution. The invention also discloses the projection light source and projection equipment.

Description

technical field [0001] The invention relates to the field of light beam illumination, in particular to a fluorescent excitation device, a projection light source and projection equipment. Background technique [0002] At present, there are mainly two ways to provide light source lighting in the industry: Figure 1A The schematic diagram of the architecture shown includes 01 laser BANK, and the parallel or nearly parallel laser emitted by 02 reflective bowl is reflected and converged to the surface of 03 fluorescent wheel to excite the fluorescent material. In this schematic diagram, the 03 fluorescent wheel is a transmissive fluorescent wheel, and the excited fluorescence is emitted from the back of the 03 fluorescent wheel, and then emitted after being converged by the 04 collimating lens group. Figure 1A What is shown is to provide illumination by collecting laser light through the reflective bowl and illuminating the rotating fluorescent wheel. In this way, due to the sur...

AI Technical Summary

Problems solved by technology

[0006] either in the above Figure 1A or Figure 1B In the illumination mode shown, on the one hand, due to the difference in convergence speed between the fast axis and the slow axis of the laser BANK itself, the laser spot itself has certain inhomogeneity, and when using such as Figure 1B In the way shown, especially when the laser is transmitted through the lens group composed of multiple lenses, due to the lens processing technology, the accumulation of aberrations of the multiple lenses, and the lens being irradiated by the laser spot with high energy density, a temperature gradient is generated by itself. Poor, so that the refractive index of the lens also changes, these reasons will again aggravate the unevenness of the laser spot

When the uneven laser spot is irradiated on the phosphor, it will inevitably lead to the unevenness of the stimulated fluorescence.

[0007] and, in Figure 1A and 1B In the method shown, due to the wide range of divergence angles of fluorescence, even if the lens for collecting light is placed closer to the rotating fluorescent wheel, the light beams with large divergence angles are still unavoidable and cannot be collected by the lens, resulting in light loss and resulting in fluorescence The collection efficiency is also low

[0008] To sum up, in the current fluorescence excitation lighting method, there are technical defects in the unevenness of the fluorescence excitation spot and low light collection efficiency.

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