Optical element, optical system, display device, and method for manufacturing optical element

JP2025070554A5Pending Publication Date: 2026-10-16CANON KK
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Patent Information

Application Number
JP2023180972
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-10-20
Publication Date
2026-10-16

AI Technical Summary

Technical Problem

In the prior art, the optical properties of optical elements are subject to changes in the spacing, width and direction of metal wires caused by the stretching of the film on the curvature surface, as well as problems with complex manufacturing processes.

Method used

An optical element is designed including a substrate with curvature, a plurality of convex ends in the first direction, and a metal layer covering the convex ends. The spacing, width and width of the convex ends meet certain conditions to ensure an improvement in optical performance.

Benefits of technology

Through this design, high optical properties and simplified manufacturing processes of optical elements are achieved, avoiding optical properties caused by film stretching and reducing manufacturing complexity.

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Abstract

To easily provide an optical element that has high optical performance.SOLUTION: An optical element (10) has a substrate (11) including a curved surface, a plurality of projections (12) arranged in a first direction on the curved surface, and metal layers (13) provided on respective side faces of the plurality of projections. Each of the plurality of projections extends in a second direction perpendicular to the first direction. When the pitch of the plurality of projections is defined as P (nm), the absolute value of the maximum angle difference between central axes of each of the plurality of projections when seen from the second direction as |Δθs| (°), the maximum width in the first direction of each of the plurality of projections as W, and the maximum width of the metal layers in the first direction of each of the plurality of projections as Wm, the following conditional expressions are satisfied. 0<P≤300, 0≤|Δθs|≤15, and 0.3≤(W+Wm) / P≤0.6.SELECTED DRAWING: Figure 2
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