Method of manufacturing optical member, and optical member

Patent metadata

Field	Value
Publication number	US-12157282-B2
Application number	US-202017637529-A
Country	US
Kind code	B2
Filing date	Sep 16, 2020
Priority date	Sep 20, 2019
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A method of manufacturing an optical member by curing a thermally polymerizable composition by heating includes, in the following order: a first step of filling an inside of a mold with the thermally polymerizable composition in which the mold is configured by disposing a frame-shaped member, with a Young's modulus of 1.0 GPa or more at a polymerization initiation temperature of the thermally polymerizable composition, between two mold members facing each other; and a second step of heating the mold to the polymerization initiation temperature or more.

First claim

The invention claimed is:

1. A method of manufacturing an optical member by curing a thermally polymerizable composition by heating, comprising, in the following order:
filling an inside of a mold with the thermally polymerizable composition in which the mold is configured by disposing a frame-shaped member, with a Young's modulus of 3.0 GPa or more at a polymerization initiation temperature T (° C.) of the thermally polymerizable composition, between two mold members facing each other; and
heating the mold to the polymerization initiation temperature T or more.

2. The method of manufacturing an optical member according to claim 1 , wherein:
the frame-shaped member is provided with at least one aperture, and
in the filling the inside of the mold, the thermally polymerizable composition is filled inside the mold from the aperture.

3. The method of manufacturing an optical member according to claim 2 , wherein:
the frame-shaped member is provided with a plurality of apertures, and
a frame portion of the frame-shaped member is positioned on virtual straight lines extending from an outside of the apertures to an inside of the frame-shaped member via the apertures.

4. The method of manufacturing an optical member according to claim 2 , wherein in the filling the inside of the mold, when the mold is disposed such that main surfaces of the mold member is substantially orthogonal to a vertical direction, the mold is provided with an aperture member connecting with the aperture at an outer peripheral side of the frame-shaped member and sloping toward a vertical upper side, and the thermally polymerizable composition is filled inside the mold via the aperture member.

5. The method of manufacturing an optical member according to claim 1 , wherein the mold is a mold layered body configured by stacking the mold members and frame-shaped members repeatedly.

6. The method of manufacturing an optical member according to claim 5 , wherein, in the heating the mold, the mold layered body is disposed such that main surfaces of the mold members are substantially orthogonal to a vertical direction and the mold layered body is heated.

7. The method of manufacturing an optical member according to claim 1 , wherein an average distance between main surfaces of the two mold members facing each other in the mold is 10 mm or less.

8. The method of manufacturing an optical member according to claim 1 , wherein a refractive index of the optical member is 1.58 or more.

9. The method of manufacturing an optical member according to claim 1 , wherein the thermally polymerizable composition contains at least one selected from the group consisting of a poly(thi)ol compound, a polyiso(thio) cyanate compound and an episulfide compound.

10. The method of manufacturing an optical member according to claim 3 , wherein in the filling the inside of the mold, when the mold is disposed such that main surfaces of the mold member is substantially orthogonal to a vertical direction, the mold is provided with an aperture member connecting with the aperture at an outer peripheral side of the frame-shaped member and sloping toward a vertical upper side, and the thermally polymerizable composition is filled inside the mold via the aperture member.

11. The method of manufacturing an optical member according to claim 2 , wherein the mold is a mold layered body configured by stacking the mold members and frame-shaped members repeatedly.

12. The method of manufacturing an optical member according to claim 3 , wherein the mold is a mold layered body configured by stacking the mold members and frame-shaped members repeatedly.

13. The method of manufacturing an optical member according to claim 4 , wherein the mold is a mold layered body configured by stacking the mold members and frame-shaped members repeatedly.

14. The method of manufacturing an optical member according to claim 10 , wherein the mold is a mold layered body configured by stacking the mold members and frame-shaped members repeatedly.

15. The method of manufacturing an optical member according to claim 11 , wherein, in the heating the mold, the mold layered body is disposed such that main surfaces of the mold members are substantially orthogonal to a vertical direction and the mold layered body is heated.

16. The method of manufacturing an optical member according to claim 12 , wherein, in the heating the mold, the mold layered body is disposed such that main surfaces of the mold members are substantially orthogonal to a vertical direction and the mold layered body is heated.

Assignees

• Mitsui Chemicals Inc

Inventors

• Ito Shinsuke
• Ribeiro Nigel

Classifications

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title

• B29C39/26

  Moulds or cores · CPC title

• B29C33/40

  Plastics, e.g. foam or rubber · CPC title

• B29D11/00538

  Feeding arrangements · CPC title

• B29D11/00009

  Production of simple or compound lenses · CPC title