透镜提升光源使用率（更加聚光），解决散光问题；

The projector lens improves the light utilization (make it more focus) and solves the problem of astigmatism.

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散光有折射缺陷的透镜或其它光学系统，阻碍光线汇聚于一个焦点，形成一个模糊或不完全的图象。

A refractive defect of a lens or other optical system that prevents light rays from converging at a single point resulting in a blurred or imperfect image.

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散光有折射缺陷的透镜或其它光学系统，阻碍光线汇聚于一个焦点，形成一个模糊或不完全的图象。

A refractive defect of a lens or other optical system that prevents light rays from converging at a single point resulting in a blurred or imperfect image.

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