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Device and method for measuring point focusing ability of off-axis paraboloidal mirror

An off-axis parabolic mirror and measuring device technology, which is used in the testing of optical performance and other directions, can solve the problems of inability to obtain focal spot energy distribution, complex structure, difficult adjustment, etc., and achieve the effects of low cost, small size and improved system resolution.

Inactive Publication Date: 2008-12-10
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Although the former is simple, intuitive, and highly sensitive, it can only measure the diameter of the focal spot and cannot obtain the energy distribution of the focal spot; the latter uses the scattered light of the focal spot on the object to obtain the information of the focal spot, which has a complex structure and is difficult to adjust , low resolution and high cost

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  • Device and method for measuring point focusing ability of off-axis paraboloidal mirror
  • Device and method for measuring point focusing ability of off-axis paraboloidal mirror
  • Device and method for measuring point focusing ability of off-axis paraboloidal mirror

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0030] see first figure 1 , figure 1 . is a schematic diagram of the optical path of an embodiment of the off-axis parabolic mirror point focusing capability measuring device of the present invention. As can be seen from the figure, the off-axis parabolic mirror point focusing ability measuring device of the embodiment of the present invention comprises: a He-Ne laser 1, a beam expander 2, a soft edge are arranged in sequence along the direction of the laser beam emitted by the He-Ne laser 1 Aperture 3 and the off-axis parabolic mirror 4 to be measured are provided with a standard cross wire 7, a microscopic objective lens 6 and a reflector 5 successively in the reflected light beam direction of the off-axis parabolic mirror 4, and the microscopic objective lens 6 is locat...

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Abstract

The invention relates to a measuring device and a measuring method for the spot focusing capacity of an off-axis parabolic mirror. The measuring device is structured by including a He-Ne laser; a beam expander, a soft aperture slot and a off-axis parabolic mirror to be measured are arranged in turn along the direction of the emergent laser beam direction of the He-Ne laser; a standard cross hair and a micro objective are arranged in turn on the direction of the reflected beam of the off-axis parabolic mirror; the micro objective is arranged on the focus of the off-axis parabolic mirror; the focus is imaged on an area array CCD; the output end of the area array CCD is connected with a computer; the off-axis parabolic mirror is fixed on a five-dimensional electric adjusting frame. The measuring device has the characteristics of simple structure, convenient adjusting and high resolution factor; besides, the measuring device not only can obtain the size of the focal spot of the off-axis parabolic mirror, but also can obtain the two-dimensional distribution information of the intensity of the focal spot as well as can obtain the three-dimensional image information of the focal spot.

Description

technical field [0001] The invention relates to an off-axis parabolic mirror, in particular to a measuring device and a measuring method for the point focusing ability of the off-axis parabolic mirror. Background technique [0002] Off-axis parabolic mirror, under ideal conditions, when the incident light is strictly parallel to the optical axis, the reflected light is focused on the focal point. After the beam is reflected and focused, the focal spot is approximately regarded as an ideal point. Compared with the transmissive focusing method, it can eliminate the unfavorable phenomena such as dispersion and self-focusing of strong laser in the medium. In addition, it is durable to high-intensity laser. In recent years, it has been widely used in laser beam focusing, in the deflection path. Especially in femtosecond strong-field laser physics experiments, due to the high requirements for the focal spot of the laser point focus, it is necessary to obtain accurate and detailed...

Claims

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Application Information

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IPC IPC(8): G01M11/02
Inventor 邹璞蔡懿王文涛夏长权刘丽李儒新刘建胜
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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