Optical device and image reading device with a plurality of lenses and light-blocking body
AssigneeFUJIFILM Business Innovation Corp.
InventorMasaki Hachisuga
Life of this patent
Estimating the term…
Abstract
An optical device includes: a lens body including plural lenses arranged such that optical axes of the plural lenses extend along each other; and a light-blocking body disposed on a light incident side of the lens body and including light-transmitting portions that transmit light and light-blocking portions that block light, the light-transmitting portions and the light-blocking portions being continuously arranged in an alternating manner such that the light-transmitting portions are positioned at the plural lenses and that the light-blocking portions are positioned between the plural lenses.
Claims6
An optical device comprising:
- a lens body including a plurality of lenses arranged such that optical axes of the plurality of lenses extend along each other;
- and
- a light-blocking body disposed on a light incident side of the lens body and including light-transmitting portions that transmit light and light-blocking portions that block light, the light-transmitting portions and the light-blocking portions being continuously arranged in an alternating manner such that the light-transmitting portions are positioned at the plurality of lenses and that the light-blocking portions are positioned between the plurality of lenses,
- wherein the light-blocking body has:
- a light-blocking direction that is a direction in which the light-transmitting portions and the light-blocking portions are continuously arranged in the alternating manner and in which the light-blocking portions block light from entering the plurality of lenses;
- and
- a light-unblocking direction that is a direction that crosses the light-blocking direction and in which the light-blocking portions do not block light.
An image reading device comprising:
- an irradiation unit that irradiates a document with light;
- a lens body including a plurality of lenses arranged such that optical axes of the plurality of lenses extend along each other, the plurality of lenses transmitting light reflected by the document;
- a light-blocking body disposed on a light incident side of the lens body and including light-transmitting portions that transmit light and light-blocking portions that block light, the light-transmitting portions and the light-blocking portions being continuously arranged in an alternating manner such that the light-transmitting portions are positioned at the plurality of lenses and that the light-blocking portions are positioned between the plurality of lenses, wherein the light-blocking body has:
- a light-blocking direction that is a direction in which the light-transmitting portions and the light-blocking portions are continuously arranged in the alternating manner and in which the light-blocking portions block light from entering the plurality of lenses;
- and
- a light-unblocking direction that is a direction that crosses the light-blocking direction and in which the light-blocking portions do not block light;
- and
- a light-receiving unit that receives light from the plurality of lenses.
Dependencies are inferred from the claim text.