Oji Holdings Corporation

Koki Hongo

Kei Shinotsuka

Kotaro Dai

Hisako Tokuno

Keiichi Kajita

A cell sheet-forming member provided with a surface for forming a cell sheet, wherein the surface comprises a plurality of flat parts and a plurality of concavo-convex parts. Each flat part has a shape extending along a first direction and the plurality of the flat parts are aligned along a second direction intersecting with the first direction over the entire surface. Either of convex parts or concave parts have a stepped structure and individual concave and convex parts include a plurality of the stepped structures which fill gaps between flat parts adjacent to each other, wherein the pitch of said stepped structures is from 100 nm to 10 μm inclusive.

Cell sheet-forming member, method for producing cell sheet-forming member, and method for producing cell sheet

An optical element having, on one surface thereof, multiple recessed sections arranged at a most frequent pitch equal to or less than the wavelength of light in the operating environment, the optical element having, when seen in plan view, multiple domains in which the multiple recessed sections are aligned in a predetermined arrangement, and, multiple protruding sections formed in a region sandwiched between the multiple domains and/or in a region surrounded by the multiple recessed sections inside the domains, the multiple protruding sections accounting for a surface area ratio of 1%-15% as seen in plan view.

Optical element including a plurality of concavities

An optical element including, on a substrate, an anti-reflection layer on multiple small concave protrusions, which have a modal pitch less than or equal to a wavelength of light in an environment where the optical element is to be used, are formed; in which 80% or more of the concave protrusions include one or more steps, and satisfy the following conditions: 0.12d&#x2264;w&#x2264;0.17d and 0.42h&#x2264;z&#x2264;0.52h, in which d is a diameter of the concave protrusions, h is a depth of the concave protrusions, wis a total width of the steps in any cut surface; and zis an average depth of the steps.

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Tokyo, Japan

Koki Hongo