Image reader
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsYoshihiro Yamazaki, Manabu Imoto
Life of this patent
Estimating the term…
Abstract
An image reader is disclosed in which, upon application of an illuminating light beam to an original by an illuminating optical system, a light beam reflected from the original is applied through a contracting optical system to a line sensor for converting an optical image of the original into an image signal. The image reader has a first mirror provided for said original to reflect said light beam reflected from the original; a repetitive reflection optical system including a pair of parallel mirrors for causing said light beam reflected by the first mirror to go and return at least once in a reflection mode; and a second mirror provided for a contracting optical system to reflect the light beam thus caused to go and return towards the contracting optical system.
Claims21
An image reader in which, upon application of an illuminating light beam to an original by an illuminating optical system, a light beam reflected from said original is applied through a contracting optical system to a line sensor for converting an optical image of said original into an image signal, comprising:
- a first mirror provided for said original to reflect said light beam reflected from said original;
- a repetitive reflection optical system including mirrors for causing said light beam reflected by said first mirror to go and return at least once in a reflection mode;
- and
- a second mirror provided for a contracting optical system to reflect said light beam passed through said repetitive reflection optical system;
- in which said first mirror provided for said original and said repetitive reflection optical system are arranged in a repetitive reflection chamber, and said contracting optical system, said second mirror and said line sensor are provided in a lens system accommodating chamber segregated from said repetitive chamber by a partition wall.
An image reader in which, upon application of an illuminating light beam to an original by an illuminating optical system, a light beam reflected from said original is applied through a contracting optical system to a line sensor for converting an optical image of said original into an image signal, comprising:
- a first mirror provided for said original to reflect said light beam reflected from said original;
- a repetitive reflection optical system including mirrors for causing said light beam reflected by said first mirror to go and return at least once in a reflection mode;
- a second mirror provided for a contracting optical system to reflect said light beam passed through said repetitive reflection optical system;
- and
- means for adjusting the direction of the reflecting surface of one of said mirrors of said repetitive reflection optical system to change the direction of said reflected light beam incident to said line sensor;
- in which said first mirror provided for said original and one of said mirrors of said repetitive reflection optical system are mirror facets of a multifaceted mirror, while a transfer mirror for sending said reflected light beam from said repetitive reflection system to said second mirror provided for said contracting optical system and the other of the mirrors of said repetitive reflection optical system are mirror facets of a second multifaceted mirror, said first and second multifaceted mirrors being disposed in such a manner as to confront with each other, and the direction of the reflecting surface of one of said first and second multifaceted mirrors is adjustable.
An image reader in which, upon application of an illuminating light beam to an original by an illuminating optical system, a light beam reflected from said original is applied through a contracting optical system to a line sensor for converting an optical image of said original into an image signal, comprising:
- a first mirror provided for said original to reflect said light beam reflected from said original;
- a repetitive reflection optical system including mirrors for causing said light beam reflected by said first mirror to go and return at least once in a reflection mode;
- and
- a second mirror provided for a contracting optical system to reflect said light beam passed through said repetitive reflection optical system;
- in which said first mirror provided for said original, one of said mirrors of said repetitive reflection optical system, and a transfer mirror for sending said reflected light beam from said repetitive reflection system to said second mirror provided for said contracting optical system form three reflecting surfaces of a single trapezoidal mirror.
An image reader in which, upon application of an illuminating light beam to an original by an illuminating optical system, a light beam reflected from said original is applied through a contracting optical system to a line sensor for converting an optical image of said original into an image signal, comprising:
- a first mirror provided for said original to reflect said light beam reflected from said original;
- a repetitive reflection optical system including mirrors for causing said light beam reflected by said first mirror to go and return at least once in a reflection mode;
- and
- a second mirror provided for a contracting optical system to reflect said light beam passed through said repetitive reflection optical system;
- in which said said first mirror provided for said original and one of said mirrors of said repetitive reflection optical system are facets of a first multifaceted mirror, while a transfer mirror for sending said reflected light beam from said repetitive reflection system to said second mirror provided for said contracting optical system and the other of the mirrors of said repetitive reflection optical system are facets of second multifaceted mirror, said first and second multifaceted mirrors being disposed in such a manner as to confront with each other.
An image reader in which, upon application of an illuminating light beam to an original by an illuminating optical system, a light beam reflected from said original is applied through a contracting optical system to a line sensor for converting an optical image of said original into an image signal, comprising:
- a first mirror provided for said original to reflect said light beam reflected from said original;
- a repetitive reflection optical system including mirrors for causing said light beam reflected by said first mirror to go and return at least once in a reflection mode;
- a second mirror provided for a contracting optical system to reflect said light beam passed through said repetitive reflection optical system;
- and
- means for adjusting the direction of the reflecting surface of one of said mirrors of said repetitive reflection optical system to change the direction of said reflected light beam incident to said line sensor;
- in which said said first mirror provided for said original, one of said mirrors of said repetitive reflection optical system, and a transfer mirror for sending said reflected light beam from said repetitive reflection system to said second mirror provided for said contracting optical system form three reflecting surfaces of a single trapezoidal mirror.
An image reader in which, upon application of an illuminating light beam to an original by an illuminating optical system, a light beam reflected from said original is applied through a contracting optical system to a line sensor for converting an optical image of said original into an image signal, comprising:
- a first mirror provided for said original to reflect said light beam reflected from said original;
- a repetitive reflection optical system including mirrors for causing said light beam reflected by said first mirror to go and return at least once in a reflection mode;
- a second mirror provided for a contracting optical system to reflect said light beam passed through said repetitive reflection optical system;
- and
- means for adjusting the direction of the reflecting surface of one of said mirrors of said repetitive reflection optical system to change the direction of said reflected light beam incident to said line sensor;
- in which said first mirror provided for said original and one of said mirrors of said repetitive reflection optical system are mirror facets of a first multifaceted mirror, while a transfer mirror for sending said reflected light beam from said repetitive reflection optical system to said second mirror provided for said contracting optical system and the other of the mirrors of said repetitive reflection optical system are mirror facets of a second multifaceted mirror, said first and second multifaceted mirrors being disposed in such a manner as to confront with each other.
An image reader comprising an illuminating optical system for directing light toward an original to be read, a line sensor for converting an optical image of said original into an image signal, and a contracting optical system for applying light reflected from said original to said line sensor, the improvement comprising a repetitive reflection optical system disposed in the optical path between said original and said contracting optical system, said repetitive reflection optical system comprising:
- a first mirro (120) for receiving light reflected from said original and for reflecting said received light;
- first (122) and second (123) repetitive reflection mirrors for receiving light from said first mirror and for subjecting said light to repetitive reflection wherein at least one of said first and second repetitive reflection mirrors reflects said light plural times during passage of said light from said first mirror to said contracting optical system, said first and second repetitive reflection mirrors being fixed relative to said first mirror during reading of said original;
- and
- a transfer mirror (124) for receiving light after plural reflections of said light by said one of said first and second mirrors and for reflecting said light toward said contracting optical system.
Dependencies are inferred from the claim text.