A dual-speed zoom lens based on polarization state control
A zoom lens and polarization state technology, which is applied in the fields of lenses, instruments, optics, etc., can solve the problems of increased system design and manufacturing costs, large volume and weight of the optical system, complex optical design, etc., and achieves compact structure, simple optical structure, and mechanical The effect of simple structure
Active Publication Date: 2017-06-27
CHINA INFORMATION COMM TECH GRP CORP
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This method requires complex and ingenious optical design, and requires precise mechanical structure to realize the movement of the lens group. Therefore, it not only increases the system design and manufacturing costs, but also increases the volume and weight of the processed optical system, which brings great difficulties to practical applications. so much inconvenience
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[0028] The present invention will be further described below with specific embodiments in conjunction with the drawings.
[0029] In recent years, metasurface has given people more room for the development of precise manipulation of light wave electromagnetic fields. Metasurface material is a two-dimensional metamaterial, that is, periodic micro-nano structures are depicted on the surface of optical materials. This kind of micro-nano structure has a special regulating effect on the incident light wave, which can be equivalent to an anisotropic material that can be changed point by point, super (> 10), super small (~0), negative ( <0) Refractive index material to precisely control the electromagnetic field of incident light waves.
[0030] The anisotropy of the metasurface material means that it is sensitive to the polarization state of the incident wave. Further research shows that the optimized design of the nano-tile with metasurface material can be equivalent to an efficient ha...
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The invention provides a dual zooming lens based on polarization state control. A polarizer, a quarter-wave plate, a first lens and a second lens are successively arranged in the forward direction of light, the first lens and the second lens employ planar nanometer brick lenses composed of nanometer brick arrays, the dimension of each nanometer brick in the nanometer brick arrays is the same, the center interval between adjacent nanometer bricks is the same, the corners of the nanometer bricks are determined according to the distance from the center of the lens. The dual zooming lens is characterized in that focal length values of two nanometer brick meta-material structured lenses can be changed to opposite numbers of original focal length values simply by changing the rotation direction of rotatory polarization of the nanometer brick meta-material structured lenses (i.e., rotating the quarter-wave plate by 90 degrees), and thus a zooming function of a combined lens is realized. The dual zooming lens with polarization control has the advantages of simple zooming, small volume, light weight, high integration, batch copy and the like, thereby can be widely applied to such fields as photon integration, laser processing and the like.
Description
Technical field [0001] The present invention relates to the fields of micro-nano optics and polarization optics, in particular to a dual-speed zoom lens based on polarization state control. Background technique [0002] Two-speed and even multi-speed zoom lenses have important applications in many fields. For example, in the field of mid-wave infrared imaging, it is necessary to realize the detection of large field of view targets (short focus case) and the recognition of small field of view targets (long focus case) without changing the lens back focal length (without focusing). For another example, in the field of laser processing, the same laser beam needs to be focused into light spots of different sizes under different working conditions. Therefore, a zoom lens is required, or a fixed focus lens with a different focal length is needed. The method of traditional lens to achieve zooming is: by optimizing the structural design of the optical system, moving the zoom lens group ...
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IPC IPC(8): G02B3/00G02B27/28
CPCG02B3/0037G02B3/0043G02B27/286
Inventor 郑国兴吴伟标何平安李松李子乐赵江南高俊玲周辉田昕张霜
Owner CHINA INFORMATION COMM TECH GRP CORP