公开(公告)号：US11561462B2

公开(公告)日：2023-01-24

申请号：US17037560

申请日：2020-09-29

Applicant: UNION OPTECH CO., LTD.

Inventor： Liwei Quan ,  Jianhua Li

IPC: G03B21/28 ,  G02B9/06 ,  G02B13/16 ,  G02B13/18 ,  G02B5/00 ,  G02B17/08

Abstract: An optical system and a projection device are provided. The optical system includes a display unit, a first lens group, a second lens group, and a reflector in sequence along a transmission direction of light; both the first lens group and the second lens group have positive focal powers; the optical system satisfies the following relationship: 0.01≤|φ100|≤0.02 and 0.005≤|φ200|≤0.015; φ100 represents a focal power of the first lens group, and φ200 represents a focal power of the second lens group.

公开(公告)号：US20220057704A1

公开(公告)日：2022-02-24

申请号：US17037560

申请日：2020-09-29

Applicant: UNION OPTECH CO., LTD.

Inventor： Liwei Quan ,  Jianhua Li

IPC: G03B21/28 ,  G02B9/06 ,  G02B17/08 ,  G02B13/18 ,  G02B5/00 ,  G02B13/16

Abstract: An optical system and a projection device are provided. The optical system includes a display unit, a first lens group, a second lens group, and a reflector in sequence along a transmission direction of light; both the first lens group and the second lens group have positive focal powers; the optical system satisfies the following relationship: 0.01≤|φ100|≤0.02 and 0.005≤|φ200|≤0.015; φ100 represents a focal power of the first lens group, and φ200 represents a focal power of the second lens group.