1. Ophthalmic endoilluminator, comprising: a light source configured to emit light； a first optical unit connected to a light source, the first optical unit configured to receive and substantially collimate light from a light source； an optical coupler, the optical coupler configured to receive substantially collimated white light from a first optical node； an optical fiber optically coupled to an optical coupler m, wherein the optical fiber is configured to conduct white light into the eye； ioptic grating connected to the distal end of the optical fiber, and the optical grating includes: a grating with a raised surface； and a coating layer optically connected to a grating with a relief surface, wherein the optical grating is capable of substantially diffracting incident light by N diffraction orders, wherein N diffraction orders have substantially uniform intensity. 2. The ophthalmic endoilluminator of claim 1, wherein the coating layer comprises a layer of dielectric material. The ophthalmic endoilluminator according to claim 1, wherein the optical grating diffracts the light into N diffraction orders of substantially uniform intensity when the grating is immersed in air or saline. The ophthalmic endoilluminator according to claim 1, in which there is a mismatch between the refractive index of the lattice with a relief surface and the refractive index of the coating layer. The ophthalmic endoilluminator according to claim 1, where: showing�1. Офтальмологический эндоиллюминатор, включающий:источник света, выполненный с возможностью излучения света；первый оптический узел, соединенный с источником света, причем первый оптический узел выполнен с возможностью приема и по существу коллимирования света от источника света；оптический соединительный элемент, причем оптический соединительный элемент выполнен с возможностью приема по существу коллимированного белого света из первого оптического узла；оптическое волокно, оптически соединенное с оптическим соединительным элемент
