Optical density measuring apparatus
AssigneeAsahi Kasei Microdevices Corporation
InventorsTakaaki Furuya, Ryotaro Okuda
Life of this patent
Estimating the term…
Abstract
A compact and highly accurate optical density measuring apparatus that includes an ellipsoidal mirror and a folding mirror is provided. In the optical density measuring apparatus, the shape of at least a part of the inner surface of a light guiding part is composed of a figure of a part of an ellipsoid E, and a shape of at least a part of another portion of the inner surface of the light guiding part is composed of a figure of a part of a plane or a quadric surface. 60% or more of the area of a light source region of a light emitting part is present in a region Rin, and 60% or more of the area of a light receiving region of a light receiving part is present in a region Rout.
Claims20
An optical density measuring apparatus comprising:
- a light emitting part;
- a light receiving part;
- and a light guiding part for guiding light from the light emitting part to the light receiving part, wherein
- a shape of at least a part of an inner surface of the light guiding part is composed of a figure of a part of an ellipsoid E, and a shape of at least a part of another portion of the inner surface of the light guiding part is composed of a figure of a part of a plane or a quadric surface, and when:
- an ellipse having a maximum area in a cross-section of the ellipsoid E is defined as an ellipse Ec, and an ellipsoid that passes through two focal points Fa and Fb of the ellipse Ec and has a minimum volume having a scaling relationship with the ellipsoid E without being rotated is defined as an ellipsoid Ein;
- a region included in the ellipsoid Ein is defined as a region Rin;
- and
- a region inside the ellipsoid E and not included in the ellipsoid Ein is defined as a region Rout;
- 60% or more of an area of a light source region of the light emitting part is present in the region Rin, and
- 60% or more of an area of a light receiving region of the light receiving part is present in the region Rout.
An optical density measuring apparatus comprising:
- a light emitting part;
- a light receiving part;
- and a light guiding part for guiding light from the light emitting part to the light receiving part, wherein
- a shape of at least a part of an inner surface of the light guiding part is composed of a figure of a part of an ellipsoid E, and a shape of at least a part of another portion of the inner surface of the light guiding part is composed of a figure of a part of a plane or a quadric surface, and when:
- an ellipse having a maximum area in a cross-section of the ellipsoid E is defined as an ellipse Ec, and an ellipsoid that passes through two focal points Fa and Fb of the ellipse Ec and has a minimum volume having a scaling relationship with the ellipsoid E without being rotated is defined as an ellipsoid Ein;
- a region included in the ellipsoid Ein is defined as a region Rin;
- and
- a region inside the ellipsoid E and not included in the ellipsoid Ein is defined as a region Rout;
- the center of gravity of the light source region or a peak point of luminance is defined as a point Gin, the center of gravity of the light receiving region is defined as a point Gout, the point Gin is present in the region Rin, and the point Gout is present in the region Rout.
An optical density measuring apparatus comprising:
- a light emitting part;
- a light receiving part;
- and a light guiding part for guiding light from the light emitting part to the light receiving part, wherein
- a shape of at least a part of an inner surface of the light guiding part is composed of a figure of a part of an ellipsoid E, and a shape of at least a part of another portion of the inner surface of the light guiding part is composed of a figure of a part of a plane or a quadric surface, and when:
- an ellipse having a maximum area in a cross-section of the ellipsoid E is defined as an ellipse Ec, and an ellipsoid that passes through two focal points Fa and Fb of the ellipse Ec and has a minimum volume having a scaling relationship with the ellipsoid E without being rotated is defined as an ellipsoid Ein;
- a region included in the ellipsoid Ein is defined as a region Rin;
- a region inside the ellipsoid E and not included in the ellipsoid Ein is defined as a region Rout;
- 60% or more of an area of a light source region of the light emitting part is present in the region Rout, and
- 60% or more of an area of a light receiving region of the light receiving part is present in the region Rin.
Dependencies are inferred from the claim text.