Holographic optical element, manufacturing method therefor and manufacturing device therefor
AssigneeLG Chem, Ltd.
InventorsHye Won Hwang, Jae Jin Kim, Bo Ra Jung, Do Kyeong Kwon
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Abstract
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.
Claims11
A method for producing a holographic optical element comprising:
- (1) laminating a master on a substrate, wherein the master is a diffractive optical element having an interference pattern formed thereon;
- (2) laminating a photosensitive material on the master, and recording the interference pattern of the master on the photosensitive material by irradiating the photosensitive material with an incident beam at a predetermined angle of incidence;
- (3) producing an optical element by separating the photosensitive material having the interference pattern recorded thereon from the master;
- (4) producing a plurality of optical elements by repeating (2) and (3) a predetermined number of times, wherein when repeating each (2), the photosensitive material is irradiated with the incident beam at a different angle of incidence so that the interference patterns recorded on the plurality of optical elements, respectively, have the a pitch equal to a pitch of the interference pattern formed on the master and different inclination angles;
- and
- (5) forming the holographic optical element by combining the plurality of optical elements together.
An apparatus for producing a holographic optical element comprising:
- a lamination unit configured to form a laminate, wherein the laminate includes a substrate, a master, and a photosensitive material formed in a predetermined order, wherein the master is a diffractive optical element having an interference pattern formed thereon;
- a beam irradiation unit configured to irradiate the photosensitive material with an incident beam at a predetermined angle of incidence so that the interference pattern of the master is recorded on the photosensitive material;
- a rotation control unit configured to rotate at least one of the laminate and the beam irradiation unit so that the predetermined angle of incidence of the incident beam incident to the photosensitive material is controlled;
- a master removal unit configured to produce an optical element and configurated to separate the photosensitive material having the interference pattern recorded thereon from the master;
- and
- a combining unit configured to combine a plurality of the optical elements together to form the holographic optical element.
Dependencies are inferred from the claim text.