Abstract: The purpose of the invention is to provide a very safe opener cap that can easily open a film serving as a section to be opened without scattering the contents. A can body (10) and a screw cap (20) are screwed together, and the screw cap (20) and an opener (30) are ratcheted together so as to rotate as a unit in the direction of the screw cap (20) tightening. Blade angles of an annular blade (34) are configured so that the blade angle in the direction of the screw cap (20) loosing is gentler than the blade angle in the direction of tightening.

Abstract: The purpose of the invention is to provide a very safe opener cap that can easily open a film serving as a section to be opened without scattering the contents. A can body (10) and a screw cap (20) are screwed together, and the screw cap (20) and an opener (30) are ratcheted together so as to rotate as a unit in the direction of the screw cap (20) tightening. Blade angles of an annular blade (34) are configured so that the blade angle in the direction of the screw cap (20) loosing is gentler than the blade angle in the direction of tightening.

Abstract: An antireflection film is formed by alternately laminating a low refractive index layer and a high refractive index layer. The antireflection film has a reflectance of 10% or less and an excitation purity range of 10 or less for visible light in a wavelength range from 380 nm to 780 nm incident at an incident angle ranging from 0° to 45° when regarding the direction perpendicular to the surface as 0°. The antireflection film inhibits a specific color tone from occurring in interference color of incident light coming from an oblique direction.

Abstract: A vapor deposition apparatus for an optical lens includes a lens holding body including a plurality of lens holes formed to be slightly larger than the optical lens. This apparatus also includes a holding means for pressing the outer peripheral surface of the optical lens in each lens hole of the lens holding body. This apparatus moreover includes lens receptacles which are provided in portions opposed to the holding means on the inner peripheral surface defining each lens hole, and receive the outer peripheral surface of the optical lens. A film can be formed on the entire optical surface of the optical lens with little possibility that this optical surface will be scratched.

Abstract: An antireflection film is formed by alternately laminating a low refractive index layer and a high refractive index layer. The antireflection film has a reflectance of 10% or less and an excitation purity range of 10% or less for visible light in a wavelength range from 380 nm to 780 nm incident at an incident angle ranging from 0° to 45° when regarding the direction perpendicular to the surface as 0°. The antireflection film inhibits a specific color tone from occurring in interference color of incident light coming from an oblique direction.