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Non-coaxial projection light source system

A light source system, non-coaxial technology, applied in the field of non-coaxial projection light source systems, can solve the problems of large system volume, complex optical path, high cost, and achieve the effect of compact system structure, good dispersion effect, and improved quality.

Pending Publication Date: 2019-07-02
CHENGDU XGIMI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide a non-coaxial projection light source system, and solve the problem that the projection light source system in the current technology uses components such as dichroic mirrors to radiate fluorescent light. Separated from the optical path of the excitation light, the optical path is complicated, there are many components, the system is large in size and high in cost

Method used

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Embodiment 1

[0029] Such as figure 1 and figure 2 As shown, the non-coaxial projection light source system mainly includes a light source 1, a fluorescent wheel 2, a converging shaping lens group 3 and a light combination assembly;

[0030] The light source 1 adopts a blue laser source, which is collimated and parallel light with good directionality. It is easy to carry out convergence shaping in the optical path, and the control is relatively easy. The convergence shaping lens group 3 is preferably an aspherical lens, which makes more effective use of the difference between radiated fluorescence and excitation light. The light path is separated;

[0031] The light source 1 emits blue laser excitation light, and the excitation light is transmitted to the fluorescent wheel 2 after being converged and shaped by the convergent shaping lens group 3. A number of radiant fluorescent lights of different colors are arranged on the fluorescent wheel 2 along the circumferential direction. The flu...

Embodiment 2

[0036] Such as image 3 and Figure 4 As shown, the difference from Embodiment 1 is that the fluorescent wheel 2 is provided with an excitation light reflection area 23 distributed on the same circumference as the phosphor powder area 21, and the excitation light reflection area 23 replaces the excitation light transmission area 22, and the excitation light reflection area 23 Diffuse reflection of excitation light, such as Figure 4 As shown, the excitation light reflection area 23 may be located on the same side of the fluorescent wheel base as the phosphor powder area 21, and the excitation light reflection area 23 may be formed by coating or other means; Figure 5 As shown, the excitation light reflection area 23 can also be a reflector parallel to the fluorescent wheel arranged on the back side of the fluorescent wheel. The back side of the fluorescent wheel is the side without the phosphor powder area of ​​the fluorescent wheel. It is a Lambertian light source, and the ...

Embodiment 3

[0038] Such as Figure 6 As shown, on the basis of Embodiment 1 and Embodiment 2, a through hole 31 for the excitation light directed to the fluorescent wheel to pass directly through can also be opened on the converging shaping lens group 3, that is, the excitation light incident to the fluorescent wheel 2 The fluorescent wheel 2 is directly irradiated without the converging and shaping effect of the converging and shaping lens group 3, because the blue laser source used in the light source 1 is collimated parallel light with good directionality, which can ensure the excitation efficiency of radiated fluorescence when irradiating the phosphor area. It can better separate the optical path of the excitation light incident to the fluorescent wheel 2 from the optical path of the radiated fluorescence converged by the converging shaping lens group 3. In this scheme, the lenses of the converging shaping lens group 3 can use aspherical lenses or spherical lenses .

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Abstract

The invention discloses a non-coaxial projection light source system. The system comprises a light source, a fluorescent wheel and a converging and shaping lens group. The excitation light emitted bythe light source irradiates to the converging and shaping lens group in the direction inclined to the optical axis of the converging and shaping lens group and then irradiates to the fluorescent wheel, and the radiation fluorescence generated by excitation on the fluorescent wheel irradiates to the converging and shaping lens group and then converges to the light path direction different from theexcitation light to be output. The non-coaxial projection light source system is simple and compact in structure, a dichroscope for light splitting is omitted, and system components are effectively reduced, thereby reducing the system cost, reducing the occupied space of the system, enabling the structure of the system to be more compact, reducing the loss in the light transmission process, and improving the output brightness of the light source.

Description

technical field [0001] The invention relates to the technical field of illumination light sources, in particular to a non-coaxial projection light source system. Background technique [0002] The light sources of the projection system are mainly divided into three categories, namely bulb light sources, LED light sources and laser light sources. Laser light source is the projection light source that has received the most attention in recent years. Laser light source has the characteristics of large wavelength selectivity and high spectral brightness. It can synthesize more than 90% of the color gamut coverage of natural colors seen by human eyes, and achieve perfect color reproduction. At the same time, the laser light source has ultra-high brightness and long service life, which greatly reduces the maintenance cost in the later stage. [0003] The currently used projection light source system uses excitation light to irradiate the fluorescent wheel to generate radiant fluor...

Claims

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Application Information

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IPC IPC(8): G03B21/20G02B26/00
CPCG03B21/204G03B21/208G03B21/206G02B26/008G03B33/08
Inventor 钟波肖适尹蕾
Owner CHENGDU XGIMI TECH CO LTD
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