The invention belongs to an optical
system, and particularly relates to a wide angle optical lens which is wide in spectrum and high in
image quality. The wide angle optical lens comprises a window, a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the window, the first lens, the second lens, the third lens, the fourth lens, the diaphragm, the fifth lens, the sixth lens, the seventh lens and the eighth lens are coaxial with one another; the window, the lenses and the diaphragm are connected through a lens cone. Compared with the prior art, the wide angle optical lens has the advantages that by reasonably selecting the surface
radius, thickness, distance and materials of the lenses, the
image plane illuminance and an
optical transfer function are increased, all kinds of lens aberrations, spherical aberrations,
coma aberrations,
astigmatism, field curvature, chromatic aberrations and
distortion are reduced, and the
wavelength range is broadened.