Patent ID: 9703072
Date: 2017-07-11
CPC Classifications: G02B

Claim:
1. A wide-angle lens comprising: an aperture stop; and a group of ten lens elements with refractive power sequence arranged in a manner mirrored in sign with respect to the stop, wherein five of the ten lens elements are on one side of the stop and another five of the ten lens elements are on an other side of the stop, wherein lens elements having positive and negative refractive power are arranged alternately in a light direction upstream and downstream of the stop and are provided with individually different values of refractive power, the group of ten lens elements including a floating element arranged along an optical axis of the wide-angle lens, the floating element is arranged downstream of the stop in the light direction, and the entire group is displaceable relative to a fixed image plane to focus the wide-angle lens, and for the focusing movement of the group, the floating element is displaceable within the group in an equidirectional manner.