Light flux controlling member and metal mold
US12287492B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2022 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | Dec 20, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/262
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a light flux controlling member that can determine the center of a lens surface (light flux control surface) that does not have a circular outer edge in plan view. A light flux controlling member of the present invention includes: a light flux control surface including an outer edge with a shape that is drawn by a point A when a straight line connecting a point O and the point A is rotated 360 degrees or more clockwise or counterclockwise around the point O while a length of the straight line is gradually increased in plan view; and a center determination mark disposed outside of the light flux control surface and on a circle around the point O in plan view.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.