Array angular beam expander

An angular beam expander and beam expander technology, which is applied in the directions of instruments, optics, lenses, etc., can solve the problems of increasing system size and impossibly small focal length.
CN1487328AInactive Publication Date: 2004-04-07HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2004-04-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The array angular beam expander is a planar array comprising two or over identical angular beam expanding assemblies. Each of the assemblies consists of a positive micro lens and a negative micro lens, and the positive micro lens and the negative micro lens have such focal lengths and interval that the total focal power of the lens combination is equal zero. In the array, the intervals between the centers of any two adjacent micro lenses are equal. The thickness of the angular beam expander depends on the thickness between the positive micro lens and the corresponding negative micro lens. Each micro lens has very small sizes and this makes the said thickness limited even if the angular amplification is very great. Theoretically, increasing the number of micro lenses and the area of the array will makes it possible to hold all the incident light beams no matter how great the aperture of the incident beam is. The present invention has greatly reduced thickness compared with available angular beam expander.
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Description

technical field

[0001] The invention relates to an optical component, in particular to an array type angular beam expander. Background technique

[0002] The function of the angular beam expander is to convert the incident plane light in one direction into the exiting plane light in another direction, and the angle between the incident light, the exiting light and the optical axis satisfies a fixed magnification.

[0003] Usually, the angular beam expander is composed of two lenses or lens groups, one positive and one negative, which coincide with the focus (such as figure 1 shown), when a beam of plane light is incident on the positive lens on the left at an angle θ, it is focused on the focal plane of the positive lens, and the distance from the converging point to the optical axis is f1×θ, because the focus of the positive lens and The focal points of the negative lens are coincident, therefore, the converging light beam will still become a plane light after being refrac...

Claims

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