Wide-angle lens and imaging equipment

Abstract

The invention discloses a wide-angle lens and an imaging device. The wide-angle lens sequentially comprises: a first lens with negative optical power from the object side to the imaging surface along the optical axis, the object side is convex, and the image side is concave; The second lens with a positive refractive power has a convex surface on the object side and the concave surface on the image side; the third lens with positive refractive power has a convex surface on the object side and a concave surface on the image side; the fourth lens with negative refractive power has a concave surface on the object side and the image side are concave; the fifth lens with positive power, the object side and the image side are convex; the diaphragm; the sixth lens with positive power, the object side and the image side are convex; The seventh lens with refractive power has a concave surface on the object side and convex or concave surface on the image side; the eighth lens with positive refractive power has convex surfaces on both the object side and the image side. The wide-angle lens in the present invention has the advantages of small size, high imaging quality, and less image plane drift in high and low temperature environments.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to a wide-angle lens and imaging equipment. Background technique [0002] The development of mobile Internet has made photos and videos a trend of sharing on the Internet to record every bit of life, which gave birth to action cameras. Since sports cameras are mostly used in environments with severe vibration, high pressure and extreme temperature, the requirements for the matching camera lenses are extremely high. On the one hand, it is necessary to solve the problem of taking pictures at any place and in any direction, and it requires high-definition imaging. The effect also requires a large field of view to meet the image shooting in a large field of view. [0003] High-definition wide-angle action cameras have entered the market for a while, and the market has transitioned from the initial design novelty to the cost-effective trade-off stage. With the continuous developm...

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Problems solved by technology

[0003] High-definition wide-angle action cameras have entered the market for some time, and the market has transitioned from the initial design novelty to the cost-effective trade-off stage, and with the continuous development of chip technology, the price of high-pixel and large CRA (Chief Ray Angle, chief ray angle) chips continues to decrease , has gradually become the main force in the market, but due to the small field of view of the general lens, the compression of the center and the edge of the field is relatively poor, and the stability of the use environment is poor, it cannot meet the needs of photographers for high-pixel sports lenses.

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