Position measurement system
AssigneeFuji Xerox Co., Ltd.
InventorsYasuji Seko, Yoshinori Yamaguchi, Hiroyuki Miyake
Life of this patent
Estimating the term…
Abstract
A position measurement system includes a photographing unit and an arithmetic processing unit. The photographing unit has a lens and a light-receiving element. The lens forms an optical ring image from light from a light source through spherical aberration. The light-receiving element detects the optical ring image formed by the lens. The arithmetic processing unit measures a distance to the light source on the basis of the quantity of light of the optical ring image detected by the light-receiving element.
Claims15
A position measurement system comprising:
- a photographing unit having;
- a lens forming an optical ring image from light from a light source through spherical aberration, and
- a light-receiving element detecting the optical ring image formed by the lens;
- and
- an arithmetic processing unit for measuring a distance to the light source on the basis of the quantity of light of the optical ring image detected by the light-receiving element.
A position measurement system comprising:
- a photographing unit having;
- a lens forming an optical ring image from light from a light source through spherical aberration;
- and
- a light-receiving element detecting the optical ring image formed by the lens;
- and
- an arithmetic processing unit measuring a distance to the light source on the basis of detection information about the optical ring image detected by the light-receiving element, wherein the arithmetic processing unit measures the distance to the light source on the basis of a diameter of the optical ring image detected by the light-receiving element when the distance to the light source falls within a predetermined range, and
- wherein the arithmetic processing unit measures the distance to the light source on the basis of a quantity of light of the optical ring image detected by the light-receiving element when the distance to the light source falls outside the predetermined range.
A position measurement method comprising:
- forming an optical ring image from light from the light source through spherical aberration;
- detecting the formed optical ring image;
- measuring a distance to the light source on the basis of a quantity of light of the detected optical ring image.
A position measurement method comprising:
- forming an optical ring image from light from the light source through spherical aberration, and
- detecting the formed optical ring image,
- measuring a distance to the light source on the basis of detection information about the detected optical ring image,
- measuring the distance to the light source on the basis of a diameter of the detected optical ring image when the distance to the light source falls within a predetermined range,
- measuring the distance to the light source on the basis of a quantity of light in the detected optical ring image when the distance to the light source falls outside the predetermined range.
A position measurement system comprising:
- a photographing unit having;
- a lens forming an optical ring image from light from a light source through spherical aberration;
- and
- a light-receiving element detecting the optical ring image formed by the lens;
- and
- an arithmetic processing unit measuring a distance to the light source on the basis of a quantity of light of the optical ring image detected by the light-receiving element,
- wherein the distance to the light source is measured on the basis of a diameter of the optical ring image detected by the light-receiving element when the distance to the light source falls within a predetermined range, and
- wherein a value of position measurement is corrected on the basis of the quantity of light of the optical ring image.
Dependencies are inferred from the claim text.