Wide-angle lens and three-dimensional scanning equipment

Abstract

The invention provides a wide-angle lens. The wide-angle lens comprises a first lens group, a diaphragm, a second lens group and a third lens group which are sequentially arranged from an object side to an image side, the first lens group has negative focal power and is used for receiving detection light and expanding the detection light; the diaphragm is used for limiting the light quantity of the detection light after beam expansion, and the diaphragm has no pupil aberration after passing through the first lens group; the second lens group has positive focal power and is used for converging the detection light from the diaphragm; and the third lens group has positive focal power and is used for adjusting the incident angle of the chief light in the detection light from the second lens group. The invention also provides a three-dimensional scanning device.

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