A holographic optical element, a method for manufacturing the same and an apparatus for producing the same are provided. More particularly, the holographic optical element is capable of enhancing the brightness of an augmented image. In one example, the holographic optical element includes a plurality of optical elements combined together and has interference patterns recorded on the plurality of optical elements, respectively. The interference patterns have the same pitch and different inclination angles.

The invention relates to techniques for producing a holographic optical element (HOE) by replication of a master HOE. In particular, the invention relates to techniques for flexibly adjusting the diffraction efficiency of the HOE. An adjustable optical element (54) can be used to modify the intensity and/or the polarisation of light during the exposure process.

An apparatus for manufacturing a hologram optical element includes laser light source (1), branching mirror (4) that branches laser light (L1) emitted from laser light source (1) into laser light (L2) and laser light (L2), mirror (6) that reflects laser light (L2), light guide plate (20) including hologram optical element (11a), coupler (10a) that causes laser light (L3) to enter light guide plate (20), and a mover that moves a radiation position of laser light (L3).

An embodiment of the present disclosure provides a holographic optical element and a manufacturing method of a holographic optical element including holographic gratings, the manufacturing method including: a step (a) of forming a photosensitive substrate by coating one surface of a substrate with a photosensitive resin; and a step (b) of recording the holographic gratings by irradiating each of one surface and the other surface of the photosensitive substrate with laser light, wherein in the step (a), the photosensitive resin is applied so that a height of a photosensitive resin coating layer varies along a predetermined direction.

The invention relates to techniques for producing a holographic optical element, HOE, by replication of a master HOE. More particularly, the invention relates to techniques for flexibly adjusting the diffraction efficiency of the HOE. An adjustable settable optical element (54) can be used to change the intensity and/or polarisation of light during an illumination process.