Uniform high-efficiency lighting system used in night viewing system

Abstract

The invention discloses an illuminating system applied to a night-vision system, which comprises a light source, a zoom lens group and a zoom driving device, wherein the zoom driving device is connected with the zoom lens group and / or the light source and used for making lenses in the zoom lens group generate relative displacement to the light source so as to change the focus distance of the zoom lens group, and a light emergent surface of the light source is positioned on a focus of the zoom lens group or outside the focus. The illuminating angle of the illuminating system can be adjusted on a large scale along with the change of the lens focus distance by changing the focus distance of the lens group. The illuminating system has even illumination, which can make the imaging clear, without dark space; and the illuminating system can effectively improve light utilization rate and reduce luminous energy loss.

Description

technical field [0001] The invention relates to a lighting technology, in particular to a uniform and high-efficiency lighting system applied in a night vision system. Background technique [0002] With the progress of society, people have already ended the life and production mode of working at sunrise and resting at sunset, and their activities at night have greatly increased. However, since the human eye can only distinguish objects under the condition that the visible light is strong enough, the human eye cannot see the spectrum beyond the visible light range. Therefore, when there is not enough lighting at night, people need to add additional light sources for lighting, such as street lights on the road, car lights, searchlights at frontier stations, etc. [0003] With the advancement of science and technology, people can use the spectrum beyond the visible light range to observe and monitor the surrounding scenery, such as using infrared night vision equipment to imag...

AI Technical Summary

Problems solved by technology

There are at least two problems, one is the uneven distribution of light intensity, the center is too bright and the surrounding is too dark, and the illumination is uneven, such as figure 2 As shown in the light intensity distribution curve 110, this situation causes the imaging picture to be unclear. Furthermore, since the photosensitive element 112 (such as a CCD) of the imaging lens is generally rectangular, such as image 3 As shown, but because the illumination area 111 is circular, so even if the illumination area is fully utilized, the efficiency is only 61% (area of ​​the CCD / area of ​​the illumination circle area), therefore, the loss of light energy is serious

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