公开(公告)号：US11378877B2

公开(公告)日：2022-07-05

申请号：US17021482

申请日：2020-09-15

Applicant: AGC INC.

Inventor： Yoshiharu Ooi ,  Koichi Tashima ,  Kensuke Ono ,  Atsushi Koyanagi

IPC: G03B21/00 ,  G03B21/20 ,  G02B3/00 ,  G02B5/18 ,  G02B27/30

Abstract: A homogenizer includes a convex-lens array pair including a first convex-lens array disposed on a light entrance side and a second convex-lens array disposed on a light emission side. The first convex-lens array and the second convex-lens array are disposed so as to face each other such that each of the convex-lens arrays has a lens surface opposed to each other outward or inward. The first convex-lens array includes a plurality of first convex lenses in an array arrangement. The second convex-lens array includes a plurality of second convex lenses in an array arrangement. The first convex lens has an average internal transmission angle for incident light entering a lens-surface center region in the lens cross-section and being in parallel with the symmetry axis being equal to or more than 1.3 times an average internal transmission angle of a spherical convex lens.

公开(公告)号：US12092840B2

公开(公告)日：2024-09-17

申请号：US17443997

申请日：2021-07-29

Applicant: AGC Inc.

Inventor： Toshiya Yonehara ,  Ryota Murakami ,  Koichi Tashima ,  Kensuke Ono

IPC: G02B27/42 ,  G03B21/20

CPC classification number: G02B27/4205 ,  G03B21/2033 ,  G03B21/2053

Abstract: A diffractive optical element includes a unit structure periodically arranged in a first direction and configured to diffract incident light in the first direction. The diffractive optical element has a phase pattern designed such that an angular separation between an outermost diffracted light beam and a second-outermost diffracted light beam along the first direction is smaller than the divergence angle of the incident light.