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A Dispersion Compensation Device

A dispersion compensation and dispersion technology, applied in the field of optics, can solve problems such as inability to fully compensate angular dispersion, and achieve the effect of simple and mature processing technology and cost saving

Active Publication Date: 2017-03-01
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a dispersion compensation device, the purpose of which is to use a pair of lens groups with high chromatic aberration to form a Kepler imaging system to realize complete compensation of dispersion, thus solving the current problem. There is a technical problem that the dispersion compensation device can only compensate for specific diffraction orders and grating constants, but cannot fully compensate for angular dispersion

Method used

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  • A Dispersion Compensation Device
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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0025] The dispersion compensation device provided by the present invention comprises a front lens group and a rear lens group, and the front lens group and the rear lens group form a Kepler telescopic system, and the focal length f of the front lens group is front and the focal length f of the rear lens group back The following relationship exists:

[0026]

[0027] Wherein, λ is the appli...

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Abstract

The invention discloses a dispersion compensation device, which comprises a front lens assembly and a rear lens assembly. A keplerian telescope system is formed by the front lens assembly and the rear lens assembly. The focal length ffront of the front lens assembly and the focal length fback of the rear lens assembly satisfy the following relationship of img file='DDA0000711078600000011, tif' wi=212' he='155', wherein lambda represents the light wavelength, and img file='DDA0000711078600000012 TIF' wi='62' he='133' represents the angular magnification. By means of the dispersion compensation device, the complete compensation for dispersion is realized. In this way, the technical problem in the prior art that the angular dispersion cannot be completely compensated by means of existing dispersion compensation devices only for the compensation at specific diffractive orders and specific grating constants can be solved.

Description

technical field [0001] The invention belongs to the field of optics, and more specifically relates to a dispersion compensation device. Background technique [0002] Gratings are widely used in the field of optics. There are many devices made using gratings or grating principles, and there are also gratings in many devices due to their periodic structures. The angular dispersion of the grating exists, and in some applications, the angular dispersion of the grating is harmful and will affect the beam quality, so it needs to be compensated. [0003] Using a prism or another grating to compensate angular dispersion is a very common technical means in the field of optics, but this compensation method can only compensate for specific diffraction orders and grating constants, and in some cases this compensation method cannot be achieved Full compensation for angular dispersion. For example, when there are multiple diffraction orders, the prism or grating can only compensate for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/02
CPCG02B13/02
Inventor 曾绍群吕晓华胡庆磊周镇乔
Owner HUAZHONG UNIV OF SCI & TECH
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