Spatial filtering system

A technology of spatial filtering and spatial filtering, applied in optical components, optics, instruments, etc., can solve the problems of high cost, increase the volume of the box, increase the industrial cost, etc., and achieve the effect of easy manipulation, small size, and improved accuracy.

Inactive Publication Date: 2011-11-09
BEIJING GK LASER TECH
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Problems solved by technology

As we all know, in order to make the performance of high-power lasers stable and not affected by the outside world, the laser cabinets are relatively thick, so the cost of high-power lase

Method used

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Example Embodiment

[0026] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0027] According to an embodiment of the present invention, a spatial filtering system is provided, including a laser input device, a spatial filter, and an optical path adjustment device. The laser input device is used to generate and preprocess the original laser, and then input the preprocessed laser into the spatial filter.

[0028] reference figure 1 In this embodiment, the laser input device includes a He-Ne laser 1, a mirror 2, a beam expander 3 and a small aperture diaphragm 4. He-Ne laser 1 is used to generate 632nm laser. The reflecting mirror 2 is two reflecting mirrors both arranged at 45 degrees, and they can rotate the traveling direction of the laser 180 degrees. At the same time, the directions of the two mirrors 2 can be fine-tuned, and the direction of the main optical path can be precisely adjusted by fine-tuning the two mirrors ...

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Abstract

The invention provides a spatial filtering system. The system comprises a laser input device, a spatial filter and an optical path adjusting device, wherein a small hole for filtering is formed in the spatial filter. The system is characterized in that: the optical path adjusting device comprises a charge coupled device (CCD) arranged on the side face of the spatial filter, and a reflecting mirror which is positioned in the spatial filter and is used for reflecting a profile image of the small hole to the CCD. The spatial filtering system has the advantages that: 1, the CCD cannot increase the length of a main optical path, so the system has small volume; 2, the laser energy loss of the main optical path is low; and 3, the system can observe an image near the small hole in the incident light direction and the emergent light direction simultaneously, is convenient to control, and is favorable for improving laser alignment accuracy.

Description

technical field [0001] The invention relates to the technical field of high-power lasers, in particular, the invention relates to a spatial filter system used in high-power lasers. Background technique [0002] The application of spatial filters in high-power laser systems has a history of nearly 40 years. Especially at the end of the 20th century, countries are committed to the development of inertial confinement fusion laser devices, such as NOVA and NIF in the United States, GIKKOX II in Japan, and France LMJ and China's Shenguang device, and spatial filters are used in these devices. [0003] Practice has proved that after using a spatial filter in a high-power laser system, the brightness, energy, and focusable power indicators of the laser are doubled, and the principle of the spatial filter is to filter the high-frequency components of the laser Gaussian beam , that is, on its Fourier spectrum, a small hole is used to filter out the high-frequency component of the in...

Claims

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Application Information

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IPC IPC(8): G02B27/46G02B27/30
Inventor 樊仲维连富强张晶侯立群邱基斯唐熊忻黄科
Owner BEIJING GK LASER TECH
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