Optical lens and electronic device having optical lens

An electronic device comprising a body and an optical lens arranged in the body, the optical lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially arranged along the optical axis from an object side to an image side, wherein:

• the fourth lens comprises a seventh surface facing the object side and an eighth surface facing the image side;
• each of the seventh surface and the eighth surface comprises at least one inflection point;
• and
• the optical lens satisfies the following conditional formulas:
• −0.48<tan(EFL4*log(Slope_L42))<−0.38;
• Conditional formula 1:
• 1 mm<Infp_L41_y<1.05 mm;
• Conditional formula 2:
• 0.58 mm<Infp_L42_y<0.69 mm;
• Conditional formula 3:
• 1<(123{circumflex over ( )}T4)/(456{circumflex over ( )}Slope_L41)<1.67;
• Conditional formula 4:
• T4=the thickness of the fourth lens;
• Slope_L41=the surface slope of the seventh surface of the fourth lens at height y=0.654321 mm;
• EFL4=the equivalent focal length of the fourth lens;
• Slope_L42=the surface slope of the eighth surface of the fourth lens at height y=0.194875 mm;
• Infp_L41_y=the height of an inflection point on the seventh surface of the fourth lens;
• Infp_L42_y=the height of an inflection point on the eighth surface of the fourth lens.