A long-distance zoom system with a large zoom ratio and a laser lighting system

Abstract

The invention discloses a large-zoom ratio long-distance zoom system and a laser illumination system. The zoom system is provided with a third lens group having a positive diopter, a second lens grouphaving a negative diopter, and a first lens group having a positive diopter which are sequentially distributed along the propagation direction of light, wherein the first lens group is fixedly arranged, the second lens group is a zoom group, the third lens group is a focusing group, and the second lens group and the third lens group are connected with each other through a linkage mechanism. According to the large-zoom ratio long-distance zoom system and the laser illumination system of the present invention, the third lens group having the positive diopter, the second lens group having the negative diopter, and the first lens group having the positive diopter are sequentially distributed along the propagation direction of the light; and the second lens group and the third lens group movein a linked manner, and therefore, 80-times focal length change can be realized, uniform illumination of a light beam can be realized within a large-zoom ratio zoom range, a zoom effect is good, and the long-distance illumination requirement of the light beam can be satisfied. The large-zoom ratio long-distance zoom system is suitable for various illumination systems and can be widely applied to the laser illumination industry.

Description

technical field [0001] The invention relates to the field of laser lighting, in particular to a long-distance zoom system with a large zoom ratio and a laser lighting system. Background technique [0002] In the field of security monitoring, long-distance near-infrared lighting has become an important technology. Near-infrared LEDs and near-infrared lasers are the most commonly used near-infrared active lighting sources. Although near-infrared LEDs have lower power consumption and lower prices than near-infrared lasers, they have poor LED lighting effects when used for long-distance lighting, such as above 150M. Small and other advantages are more suitable as a long-distance lighting source. Therefore, long-distance near-infrared active lighting usually uses near-infrared lasers with a wavelength of 808-980nm as the lighting source. [0003] In order to make effective use of the laser output beam and make its illumination angle continuously adjustable within a certain ran...

AI Technical Summary

Problems solved by technology

[0004] At present, the common zoom factor of long-distance and near-infrared laser lighting lenses is generally 60-80 times F1.8. When applied to the current lighting system, there is a problem that the range of lighting angle is not reasonable enough. In actual use, the lighting angle must be within the range of change Overall too large, or too small

The overall lighting angle within the changing range is too small, causing the image to be easily overexposed at its minimum lighting angle, and the lighting range is too small at its maximum lighting angle; Compared with other systems, the angle is relatively large, which leads to a corresponding reduction in the lighting distance that can be achieved. At the maximum lighting angle, the theoretical lighting range is relatively large, but in actual use, the energy of the laser is constant, and the lighting effect is better when it exceeds a certain lighting range. Poor, not even up to the effect of lighting

[0005] In general, the current long-distance laser lighting system has poor lighting effects within its variation range, and it is difficult to meet the application requirements

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