Canon Kabushiki Kaisha

Yu Kameno

Kenji Makino

Toshiaki Yoshikawa

Tomonari Nakayama

Junji Terada

Noriyuki Nakai

Kazuhiro Arai

Miwa Takachi

In a toric lens comprising a toric surface having a fine uneven structure, the fine uneven structure includes a plurality of holes, the plurality of holes have a hole depth H and a surface opening diameter &#x3c6;t which satisfy an expression of 0.3&#x2264;H/&#x3c6;t&#x2264;0.6, and (a) the plurality of holes have a hole structure having a cylindrical shape on a bottom surface side and a circular truncated cone shape having an opening diameter increasing toward a surface side, or (b) an angle &#x3b8; formed between an opening portion and the surface of the plurality of holes satisfies 78&#xb0;&#x2264;&#x3b8;&#x2264;85&#xb0;.

Toric lens, optical element, and image forming apparatus

The optical member according to the present invention includes a film containing a plurality of chain particles and having a refractive index of 1.21 or more and 1.27 or less at a wavelength of 550 nm on a substrate. The film includes an alcohol having an ether bond or an ester bond and having a branched structure having 4 to 7 carbon atoms in a range of 1.0 mg/cmor more and 2.8 mg/cmor less.

Optical member, image pickup apparatus, and method for manufacturing optical member

The present invention provides a method of producing hollow particles for reducing light scattering in an antireflection coating. This method includes synthesizing core-shell particles including a core containing an organic compound as a major component and a shell containing an inorganic-based compound as a major component in an aqueous medium, dispersing the core-shell particles in an organic solvent, and preparing hollow particles by heating the core-shell particles dispersed in the organic solvent to remove the core therefrom.

Method of producing hollow particles, method of producing antireflection coating, and method of producing optical element

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London, United Kingdom

Yu Kameno