公开(公告)号：US11598972B2

公开(公告)日：2023-03-07

申请号：US16672669

申请日：2019-11-04

Applicant: AGC Inc.

Inventor： Koji Miyasaka ,  Ryota Murakami

IPC: G02B27/42 ,  G11B7/1353 ,  G11B7/09

Abstract: To provide a diffractive optical element having a high light utilization efficiency, whereby light spots having a predetermined pattern can be stably formed, a projection device and a measuring device.
The diffractive optical element of the present invention comprises a transparent substrate, a convexo-concave portion formed so as to be in contact with one surface of the transparent substrate and a filling portion with which concave portions of the convexo-concave portions are filled and which covers top surfaces of convex portions of the convexo-concave portion for planarizing the convexo-concave portion, wherein the convexo-concave portion has at least two stages on the surface of the transparent substrate; the top surfaces of the respective stages are parallel to one another; among the transparent substrate, the convexo-concave portion and the filling portion, the refractive indexes of at least the convexo-concave portion and the filling portion are different with respect to the incident light which enters from the normal direction of the surface of the transparent substrate; and the refractive indexes of the transparent substrate, the convexo-concave portion and the filling portion with respect to incident light are at most 2.2.

公开(公告)号：US10921501B2

公开(公告)日：2021-02-16

申请号：US15650202

申请日：2017-07-14

Applicant: AGC Inc.

Inventor： Koji Miyasaka

IPC: G02B5/20 ,  G02B5/02 ,  G01J5/08 ,  G02B5/28 ,  G01J5/02 ,  H01L27/146 ,  G01J5/00 ,  H04N5/33 ,  H04N5/74

Abstract: An optical member includes a reflection-scattering unit that reflects and scatters light having a wavelength band which corresponds to at least a portion of a visible wavelength range, and transmits light having a wavelength band which corresponds to at least a portion of an infrared region, wherein rectilinear transmittance for the light having the wavelength band which corresponds to at least the portion of the infrared region is equal to or greater than 75%.

公开(公告)号：US11740426B2

公开(公告)日：2023-08-29

申请号：US17167264

申请日：2021-02-04

Applicant: AGC Inc.

Inventor： Koji Miyasaka ,  Jin Uemura ,  Gousuke Yoshida ,  Kosuke Takayama

IPC: G02B7/02 ,  G02B3/00

CPC classification number: G02B7/028 ,  G02B3/00

Abstract: An optical element includes: a glass substrate; an optical function portion made of a resin; and a bonding portion that bonds the glass substrate and the optical function portion to each other. The bonding portion has a glass transition point of 85° C. or lower. The glass transition point of the bonding portion may be 50° C. or lower.

公开(公告)号：US11489990B2

公开(公告)日：2022-11-01

申请号：US17026367

申请日：2020-09-21

Applicant: AGC Inc.

Inventor： Koji Miyasaka ,  Masatoshi Oyama

IPC: H04N5/225 ,  G02B7/02 ,  G02B3/04 ,  G02B1/04

Abstract: The present invention relates to an optical element including an optical surface, a tapered part located on an outer peripheral side of the optical surface and having a normal line of which a direction heading to an outside of the optical element from an inside thereof, faces an optical axis side, and a side surface part located on an outer peripheral side of the tapered part, in which when a distance in a straight line vertical to an optical axis of from an end point on the optical axis side of the tapered part to the side surface part is denoted by A and a height of the tapered part based on the straight line is defined by B, in a cross section including the optical axis and passing through the tapered part, B/A is larger than 0.2.