Camera optical lens

A camera optical lens comprising, from an object side to an image side in sequence:

• a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens;
• wherein the first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of glass material, the fifth lens is made of plastic material, the sixth lens is made of plastic material, and the seventh lens is made of plastic material;
• wherein the camera optical lens further satisfies the following conditions:
• −10≤f1/f≤−3.1;
• 1.7≤n4≤2.2;
• 1≤f6/f7≤10;
• 1.7≤(R1+R2)/(R1−R2)≤10;
• and,
• 0.01≤d7/TTL≤0.2;
• where
• f:
• the focal length of the camera optical lens;
• f1:
• the focal length of the first lens;
• f6:
• the focal length of the sixth lens;
• f7:
• the focal length of the seventh lens;
• n4:
• the refractive index of the fourth lens;
• R1:
• the curvature radius of object side surface of the first lens;
• R2:
• the curvature radius of image side surface of the first lens;
• d7:
• the thickness on-axis of the fourth lens;
• TTL:
• Total Track Length of the camera optical lens.