A removable lens stack includes a base layer, a first removable lens layer, and a second removable lens layer. The base layer may include a substrate and a moth eye coating. The first removable lens layer may include a substrate, a single or multi-layer interference antireflective coating on a first side of the substrate, and a fluoropolymer coating on a second side of the substrate. The first removable lens layer may be stacked on top of the base layer with the fluoropolymer coating being molded to fit the moth eye coating. The second and any subsequent removable lens layer may include a substrate, a single or multi-layer interference antireflective coating on a first side of the substrate, and an acrylic or polyurethane adhesive on a second side of the substrate. The second removable lens layer may be stacked on top of the first removable lens layer and so on.

A surface structure for a touch panel display includes a glass layer having a first surface and a second surface. The first surface is on an interior side of the glass layer and the second surface is on an exterior side of the glass layer. The surface structure further includes a first protective layer formed to the first surface, and a second protective layer formed to the second surface. The second protective layer includes an array of bumps on an exterior side of the glass layer. The array of bumps provides a gradation of a refractive index of a material of the second protective layer.

A laminate includes a substrate; and a layer (a) containing particles forming a specific uneven shape, the number of particles present on the surface of the layer (a) is 6.3 to 20 per 1 μm.sup.2, and a heat shrinkage rate of the laminate in a case of being heated for one hour at a glass transition temperature of the substrate+10° C. is 20% or more and less than 70%. An antireflection product has a three-dimensional curved surface having a curvature radius of 1 to 1,000 mm, and has a specific uneven shape formed of particles on the three-dimensional curved surface, the number of metal oxide particles present on the three-dimensional curved surface is 9 to 40 per 1 μm.sup.2, and a difference between a maximum value and a minimum value of reflectivities is less than 1.2%.

A laminate includes a substrate; and a layer (a) containing particles forming a specific uneven shape, the number of particles present on the surface of the layer (a) is 6.3 to 20 per 1 μm.sup.2, and a heat shrinkage rate of the laminate in a case of being heated for one hour at a glass transition temperature of the substrate+10° C. is 20% or more and less than 70%. An antireflection product has a three-dimensional curved surface having a curvature radius of 1 to 1,000 mm, and has a specific uneven shape formed of particles on the three-dimensional curved surface, the number of metal oxide particles present on the three-dimensional curved surface is 9 to 40 per 1 μm.sup.2, and a difference between a maximum value and a minimum value of reflectivities is less than 1.2%.

The present invention provides a method for producing an optical film excellent in anti-fouling properties and scratch resistance as well as anti-reflection properties. The method includes the steps of: (1) applying a lower layer resin and an upper layer resin; (2) forming a resin layer having the uneven structure on a surface thereof by pressing a mold against the lower layer resin and the upper layer resin from the upper layer resin side in the state where the applied lower layer resin and upper layer resin are stacked; and (3) curing the resin layer, the lower layer resin containing at least one kind of first monomer that contains no fluorine atoms, the upper layer resin containing a fluorine-containing monomer and at least one kind of second monomer that contains no fluorine atoms, at least one of the first monomer and the second monomer containing a compatible monomer that is compatible with the fluorine-containing monomer and being dissolved in the lower layer resin and the upper layer resin.

The present invention provides a method for producing an optical film excellent in anti-fouling properties and scratch resistance as well as anti-reflection properties. The method includes the steps of: (1) applying a lower layer resin and an upper layer resin; (2) forming a resin layer having the uneven structure on a surface thereof by pressing a mold against the lower layer resin and the upper layer resin from the upper layer resin side in the state where the applied lower layer resin and upper layer resin are stacked; and (3) curing the resin layer, the lower layer resin containing at least one kind of first monomer that contains no fluorine atoms, the upper layer resin containing a fluorine-containing monomer and at least one kind of second monomer that contains no fluorine atoms, at least one of the first monomer and the second monomer containing a compatible monomer that is compatible with the fluorine-containing monomer and being dissolved in the lower layer resin and the upper layer resin.

Visibility of an optical film at the time of handling can be improved, and an antireflection region and a visible region can be easily formed on a surface of the optical film in an identical processing step. An optical film 1 includes a base material 11 having flexibility and a resin layer 12 laminated on at least one of surfaces of the base material 11. The resin layer 12 includes a concave-convex pattern region 2 in which a micro concave-convex structure 20 composed of a plurality of convexities 21 or concavities 22 arrayed at a pitch P less than or equal to a wavelength of visible light are formed and a strip-shaped line marker region 3 in which a plurality of ridge portions 31 arrayed at intervals from one another at a track pitch P.sub.t more than or equal to the wavelength of visible light are formed.

There is provided a new and improved optical film, connecting member, endoscope camera drape, endoscope device, medical system, optical film production method, and connecting member production method capable of suppressing quality degradation of a captured image while also protecting the endoscope camera from airborne droplets, the optical film provided on the endoscope camera drape including: a drape section that covers a circumferential face of an endoscope camera, and a connecting member which is provided on a front end of the drape section and connects an endoscope and the endoscope camera, the optical film being provided on the connecting member, and including: a reflection suppression section configured to suppress a reflection of incident light incident on the endoscope camera from the endoscope.

There is provided a new and improved optical film, connecting member, endoscope camera drape, endoscope device, medical system, optical film production method, and connecting member production method capable of suppressing quality degradation of a captured image while also protecting the endoscope camera from airborne droplets, the optical film provided on the endoscope camera drape including: a drape section that covers a circumferential face of an endoscope camera, and a connecting member which is provided on a front end of the drape section and connects an endoscope and the endoscope camera, the optical film being provided on the connecting member, and including: a reflection suppression section configured to suppress a reflection of incident light incident on the endoscope camera from the endoscope.

Embodiments of the present disclosure provide for methods of making substrates having an (AR) antireflective layer, substrates having an antireflective layer, devices including a substrate having an antireflective layer, and the like. The AR layer can have a total specular reflection of less than 10% at a wavelength of about 400-800 nm, and a height of about 500-1000 nm.