Patent ID: 11906744
Assignee: LG CHEM, LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A method for manufacturing a display lens including a holographic optical element, the method comprising:
a step (a) of causing a first laser light, converging along a first irradiation direction, to be incident on a first surface of a photosensitive substrate in which a substrate is coated with a photosensitive material; and
a step (b) of causing a second laser light, diverging along a second irradiation direction, to be incident on a second surface of the photosensitive substrate while the step (a) is performed, the second surface being opposite from the first surface,
wherein during the step (b), parallel light is incident on a lens array having a top surface on which a plurality of lens portions configured to convert the parallel light into diverging light is arranged, such that the second laser light is radiated toward the second surface of the photosensitive substrate at a plurality of points through respective ones of the plurality of lens portions.