Holographic collimator optical path

The invention provides a holographic collimator optical path which comprises a laser diode and a holographic lens for carrying out beam expansion and deflection on laser emitted by the laser diode. The holographic collimator optical path also comprises a holographic combined component with a holographic differentiation image for collimating, filtering and deflecting the emergent light of the holographic lens; and the holographic combined component is a combined holographic component with the properties of the lens and an imaging hologram and consists of a photosensitive film and two pieces of glass cemented on the two surfaces of the photosensitive film. The invention has the beneficial effects that the holographic collimator optical path has the characteristic of less optical path component, varied optical path styles and shorten the length of optical path system, the structure of a product utilizing the optical path is more compact, flexible and varied, and the defects of long optical path system, more comp