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US 6,961,190 B1Granted
Bulk lens, light emitting body, lighting device and optical information system
AssigneeLabosphere Institute
InventorsSatoshi Tamaoki, Hirao Ohta, Akihisa Minato
Life of this patent
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Abstract
The lens embraces a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface, and a well-shaped concavity is implemented in the inside of the lens body, aligned from the bottom surface toward the top surface. The lens body has geometry such as bullet-shape or egg-shape. A ceiling surface of concavity implemented in the lens body serves as a first lens surface, the top surface of the lens body serves as the second lens surface, and inside of the concavity serves as a storing cavity of a light source or a photodetector.
Claims24
A bulk-shaped lens comprising:
- a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface;
- and
- a well-shaped concavity implemented inside of the lens body, aligned to the top surface from the bottom surface,
- wherein a ceiling surface of the concavity serves as a first lens surface, the top surface of the lens body serves as a second lens surface, and inside of the concavity serves as a storing cavity of light source or photodetector, and
- wherein an outside diameter of the contour surface of the lens body is larger than 3 times and smaller than 10 times of an inside diameter of the concavity.
2 more elements
A bulk-shaped lens comprising:
- a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface;
- and
- a well-shaped concavity implemented inside of the lens body, aligned to the top surface from the bottom surface,
- wherein a ceiling surface of the concavity serves as a first lens surface, the top surface of the lens body serves as a second lens surface, and inside of the concavity serves as a storing cavity of light source or photodetector, and
- wherein, with radius R of curvature of the second lens surface, overall length L measured along optical axis direction of the bulk-shaped lens, refractive index n of the bulk-shaped lens, following relationships are satisfied:
- 0.93<k(R/L)<1.06
- k=1/(0.35·n−0.168).
4 more elements
A bulk-shaped lens comprising:
- a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface;
- and
- a well-shaped concavity implemented inside of the lens body, aligned to the top surface from the bottom surface,
- wherein a ceiling surface of the concavity serves as first lens surface, the top surface of the lens body serves as a second lens surface, and inside of the concavity serves as a storing cavity of light source or photodetector, and
- wherein, with protruding height Δ of the first lens surface established at the ceiling surface of the concavity, outside diameter 2Ro of the contour surface of the lens body, following relationship is satisfied:
- 0.25<Δ/Ro<0.075.
3 more elements
A light-emitting unit comprising:
- a light source configured to emit light of predetermined wavelength;
- a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface;
- and
- a well-shaped concavity implemented inside of the lens body, aligned to the top surface from the bottom surface,
- wherein a ceiling surface of the concavity serves as an entrance surface, the top surface of the lens body serves as an exit surface, and the light source is installed in the concavity, and
- wherein an outside diameter of the contour surface of the lens body is larger than 3 times and smaller than 10 times of an inside diameter of the concavity.
3 more elements
A light-emitting unit comprising:
- a light source configured to emit light of predetermined wavelength;
- a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface;
- and
- a well-shaped concavity implemented inside of the lens body, aligned to the top surface from the bottom surface,
- wherein a ceiling surface of the concavity serves as an entrance surface, the top surface of the lens body serves as an exit surface, and the light source is installed in the concavity, and
- wherein, with radius R of curvature of the exit surface, overall length L measured along optical axis direction of the bulk-shaped lens, refractive index n of the bulk-shaped lens, following relationships are satisfied:
- 0.93<k(R/L)<1.06
- k=1/(0.35·n−0.168)o.
5 more elements
A light-emitting unit comprising:
- a light source configured to emit light of predetermined wavelength;
- a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface;
- and
- a well-shaped concavity implemented in the inside of the lens body, aligned to the top surface from the bottom surface,
- wherein a ceiling surface of the concavity serves as an entrance surface, the top surface of the lens body serves as an exit surface, and the light source is installed in the concavity, and
- wherein, with protruding height Δ of the entrance surface established at the ceiling surface of the concavity, outside diameter 2Ro of the contour surface of the lens body, following relationship is satisfied:
- 0.25<Δ/Ro<0.075.
4 more elements
A lighting equipment comprising:
- a power supply unit;
- a light source connected to the power supply unit;
- a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface;
- and
- a well-shaped concavity implemented inside of the lens body, aligned to the top surface from the bottom surface,
- wherein an outside diameter of the contour surface of the lens body is larger than 3 times and smaller than 10 times of an inside diameter of the concavity, and
- wherein a ceiling surface of the concavity serves as an entrance surface, the top surface of the lens body serves as an exit surface, and the light source is installed in the concavity.
4 more elements
An optical information system comprising:
- a light-emitting unit comprising:
- a bulk-shaped first lens body identified by a first top surface, a first bottom surface and a first contour surface;
- and
- a well-shaped first concavity implemented in the inside of the first lens body, aligned to the first top surface from the first bottom surface;
- and
- a light source installed in the first concavity, the light source configured to emit light of predetermined wavelength;
- and
- a light-receiving unit comprising:
- a bulk-shaped second lens body identified by a second top surface, a second bottom surface and a second contour surface;
- and
- a well-shaped second concavity implemented in the inside of the second lens body, aligned to the second top surface from the second bottom surface;
- and
- a photodetector installed in the second concavity, the photodetector is configured to detect the light of predetermined wavelength;
- wherein a first ceiling surface of the concavity serves as a first entrance surface, the first top surface of the first lens body serves as a first exit surface, the second top surface of the second lens body serves as a second entrance surface, and a second ceiling surface of the second concavity serves as a second exit surface.
11 more elements
Dependencies are inferred from the claim text.