Laminiertes Diffraktives Optisches Element und Produktionsprozess dafür

Details

Veröffentlichungs-Nr.

EP2662205

Aktenzeichen

EP13164639

Anmeldetag

22. April 2013

Veröffentlichung

24. Juni 2020

Erteilung

24. Juni 2020

Rechtsraum

EP

IPC

B29D11/00G02B5/18

Abstract

A laminated diffraction optical element includes a substrate (1), and a resin layer (10) provided on the substrate (1) and including an optically effective portion (4) and an optically non-effective outer portion (5) adjacent to the optically effective portion (4). The optically non-effective outer portion (5) in the resin layer 10) has a continuous shape (12) such that a layer thickness decreases when extending toward an outer periphery of the substrate (1). An angle formed between a straight line connecting both ends (10a, 10b) of the continuous shape (12) and a tangent (11) to a surface of the substrate (1) at a point (10c) opposite to an end (10a) closer to the surface of the substrate (1) is within a range of 20 to 60 degrees.

Anmelder

Firma

Canon Kabushiki Kaisha

Land

🇯🇵 Japan

Fachgebiete