公开(公告)号：US20250123474A1

公开(公告)日：2025-04-17

申请号：US18813759

申请日：2024-08-23

Applicant: KOREA BASIC SCIENCE INSTITUTE

Inventor： Dong Uk Kim ,  Ki Soo Chang ,  I Jong Kim ,  Chan Bae Jeong ,  Dongmok Kim ,  Ilkyu Han

IPC: G02B21/08 ,  G02B21/26 ,  G02B26/06

Abstract: A variable coherence illumination device is disclosed. The variable coherence illumination device includes a light source generator configured to emit a beam and configured to control a wavelength of the beam, a focusing lens configured to focus the beam, a first diffuser on which a beam passing through the focusing lens is incident, a second diffuser facing the first diffuser and rotatable around a rotation axis of the second diffuser, in which a focusing region on which the beam passing through the first diffuser is focused by the focusing lens is formed on the second diffuser, in which the focusing region of the second diffuser is spaced apart from the rotation axis of the second diffuser.