Wide-angle lens
A wide-angle lens and lens technology, applied in the field of wide-angle lenses, can solve the problems of low image brightness and large F number, and achieve the effect of reducing the F number and improving image brightness and imaging quality.
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[0070] The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.
[0071] Please combine figure 1 and figure 2 It should be understood that this embodiment provides a wide-angle lens, and the wide-angle lens is arranged coaxially with the first lens 10, the second lens 20, the third lens 30, A diaphragm 60 , a fourth lens 40 , a fifth lens 50 and a filter 70 . The materials of the first lens 10 and the third lens 30 are all glass; the materials of the second lens 20 , the fourth lens 40 and the fifth lens 50 are all plastic.
[0072]The first lens 10 is a spherical mirror, the refractive power of the first lens 10 is negative, and the first lens 10 includes a first spherical surface 11 and a second spherical surface 12 . The second lens 20 is an aspheric mirror, the refractive power of the second lens 20 is negative, and the second lens 20 includes a first aspheric surface 21 and a second...
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Abstract
Description
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