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Homogenization method for laser supplementary light and laser lighting device thereof

A technology for laser lighting and chemical devices, applied in installation, optics, optical components, etc., can solve problems such as unevenness, laser speckle light and dark interlaced brightness, etc., achieve clear images, solve laser speckle defects, and improve application effects.

Inactive Publication Date: 2011-12-28
SHENZHEN GEDAD TECH
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  • Abstract
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Problems solved by technology

[0005] The object of the present invention is to provide a homogenization method for laser supplementary light and its laser lighting device, which can solve the problem of laser speckle (that is, the interlaced brightness of light and dark on the light projection surface) caused by the high coherence of laser. Inhomogeneity) defects, make the image clearer, and can completely eliminate laser speckle

Method used

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  • Homogenization method for laser supplementary light and laser lighting device thereof
  • Homogenization method for laser supplementary light and laser lighting device thereof
  • Homogenization method for laser supplementary light and laser lighting device thereof

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Embodiment Construction

[0024] Various preferred embodiments of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0025] The homogenization method of the laser supplementary light of the present invention and its laser lighting device, such as figure 1 Shown is the schematic diagram of the complete optical path composition of the laser illuminator, where A is a semiconductor laser, including laser diodes, laser diodes with optical fiber output, etc., used to emit laser light; B is a homogenization device, including optical fibers, frosted glass, At least one of polygonal prisms and sieves, etc., is used to homogenize the energy of the laser light; C is a lens group, which consists of a beam expander, a focusing lens, etc., which are used to expand and focus the laser light for irradiation Processing; It should be noted that the better arrangement of the lens group in the present invention is that the beam expander is in front and the focus l...

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Abstract

The invention discloses a homogenizing method for laser illumination and a laser illumination device. The device comprises a semiconductor laser unit, a homogenizing device and a lens set; the semiconductor laser unit is used for emitting laser for irradiation; the homogenizing device is used for energy distribution homogenization on a vertical plane in the laser transmission direction; the lens set at least comprises a beam expander and a focusing lens which are used for expanding beams and focusing the laser for irradiation; and the device is also provided with a vibrating or rotating device for keeping relative vibration or rotation between at least two of the semiconductor laser unit, the homogenizing device and the lens set, and the vibrating or rotating period of the vibrating or rotating device is smaller than or equal to the time of an electronic shutter of a camera. According to the homogenizing method for laser illumination and the laser illumination device, because the vibrating or rotating homogenizing method and the laser illumination device are adopted, light and dark stripes in images and laser speckles in the images are eliminated.

Description

technical field [0001] The invention relates to an image acquisition system and method, in particular to a method for homogenizing laser supplementary light in the process of infrared laser imaging and the improvement of the laser lighting device. Background technique [0002] In the prior art, with the development of night camera technology, the requirements for infrared laser supplementary light (or called infrared laser lighting) are getting higher and higher. At present, most of the semiconductor laser illuminator is used for infrared camera supplementary light in the market. [0003] Due to the defect of uneven light energy distribution in semiconductor lasers, various types of beam splitters or optical fibers are commonly used in the market to homogenize the laser beam. However, due to the high coherence of the laser itself, although all the above homogenization methods or devices will eliminate There are some light and dark stripes in the image, but all of them will p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09
CPCG02B27/48G02B23/12G02B27/0933G02B7/04G02B27/09
Inventor 陆知纬方享文费维刚王勇来
Owner SHENZHEN GEDAD TECH
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