Manufacturer of spherical lens - Imaging formula of spherical lens
In fact, spherical lens is also convex lens, and its imaging law can be expressed by convex lens imaging formula
1 / u (object distance) + 1 / V (image distance) = 1 / F (lens focal length)
(about the positive and negative signs: the object distance u is always positive. The positive and negative of the image distance V is determined by the real and virtual image. V is positive in real image and negative in virtual image. F of convex lens is positive and F of concave lens is negative.)
