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US 5,296,724 AGranted
Light emitting semiconductor device having an optical element
AssigneeOMRON Corporation
InventorsShiro Ogata, Koichi Imanaka, Hiroshi Goto, Yoshinori Ito, Kourou Kitajima
Life of this patent
Estimating the term…
Abstract
A light emitting semiconductor device including a light emitting element, an optical element for condensing, collimating or diverging a ray emitted from the light emitting element which is packaged as a single unit with the light emitting element, and a cap molded by a fiber reinforced resin for supporting the light emitting element, the cap having an opening for a light emitting window which is provided with the optical element.
Claims30
A light emitting semiconductor device comprising:
- a light emitting element;
- an optical element for condensing, collimating or diverging a ray emitted from the light emitting element which is packaged as a single unit with said light emitting element;
- said optical element and light emitting element being responsive to changes in temperature which produce changes in a condensing angle, collimations, or diverging angle of light emitted by said unit;
- and,
- means for compensating for said temperature induced changes, said compensating means being constructed as at least part of a protective cap which surrounds and protects said light emitting element, said optical element being connected to said protective cap, said protective cap changing a focal distance of said optical element in response to changes in temperature.
2 more elements
A light emitting semiconductor device comprising:
- a light emitting element;
- an optical element for condensing, collimating or diverging a ray emitted from the light emitting element which is packaged as a single unit with said light emitting element;
- said optical element and light emitting element being responsive to changes in temperature which produce changes in a condensing angle, collimation, or diverging angle of light emitted by said unit;
- and,
- means for compensating for said temperature induced changes, said compensating means changing a focal distance of said optical element in response to changes in temperature, wherein said compensation means comprises an elastic member for supporting said light emitting element within said unit, said elastic member having a large thermal expansion coefficient and expanding and contracting in accordance with temperature changes to thereby change the relative distance between said light emitting element and said optical element.
2 more elements
A light emitting semiconductor device comprising:
- a light emitting element;
- an optical element for condensing, collimating or diverging a ray emitted from the light emitting element which is packaged as a single unit with said light emitting element;
- said optical element and light emitting element being responsive to changes in temperature which produce changes in a condensing angle, collimation, or diverging angle of light emitted by said unit;
- and,
- means for compensating for said temperature induced changes, said compensating means changing a focal distance of said optical element in response to changes in temperature, wherein said compensating means is at least one of the optical element and a lens mounting base plate for mounting the optical element, said compensating means being formed of a material having a large coefficient of thermal expansion.
2 more elements
A light emitting semiconductor device comprising:
- a light emitting element;
- an optical element for condensing, collimating or diverging a ray emitted from the light emitting element which is packaged as a single unit with said light emitting element;
- said optical element and light emitting element being responsive to changes in temperature which produce changes in a condensing angle, collimation, or diverging angle of light emitted by said unit;
- and,
- means for compensating for said temperature induced changes, said compensating means changing a focal distance of said optical element in response to changes in temperature, wherein said compensation means comprises a lens mounting base plate for mounting the optical element which is formed of a material having a large coefficient of thermal expansion, and wherein the distance between fixing positions of the lens mounting base plate and of the optical element is maintained at a predetermined distance to decrease a change of angle of a condensing or a diverging ray or a change of a collimating ray emitted from the light emitting semiconductor device which is accompanied by a change of temperature.
2 more elements
A light emitting semiconductor device comprising:
- a light emitting element;
- an optical element for condensing, collimating or diverging a ray emitted from the light emitting element which is packaged as a single unit with said light emitting element;
- said optical element and light emitting element being responsive to changes in temperature which produce changes in a condensing angle, collimation, or diverging angle of light emitted by said unit;
- and,
- means for compensating for said temperature induced changes, said compensating means changing a focal distance of said optical element in response to changes in temperature, wherein said compensating means is at least one of the optical element and a lens mounting base plate for mounting the optical element, said compensating means being formed of a material having a large coefficient of thermal expansion, and wherein the distance between fixing positions of the lens mounting base plate and of the optical element is maintained at a predetermined distance to decrease a change of angle of a condensing or a diverging ray or change of a collimating ray emitted from the light emitting semiconductor device according to a change of temperature.
2 more elements
A light emitting semiconductor device comprising:
- a light emitting element,
- a first supporting member for supporting said light emitting element,
- a flat shaped optical element for condensing, collimating or diverging light rays emitted from said light emitting element, said optical element having a pattern formed on one surface which is disposed towards said light emitting element, said optical element being packaged with said light emitting element as a single unit, and
- a second supporting member for supporting said optical element by a surface opposite to the surface on which said pattern is formed, and
- wherein said optical element has a larger coefficient of thermal expansion than said first and second supporting members such that thermal expansion and contraction of said optical element by changes in temperature occur with reference to the surface opposite to the surface on which said pattern is formed.
2 more elements
A light emitting semiconductor device comprising
- a light emitting element,
- an optical element for condensing, collimating or diverging light rays emitted from the light emitting element, said optical element being packaged with the light emitting element as a single unit,
- a package member for supporting said optical element and said light emitting element such that said light emitting element is at the focal position of said optical element, and
- an elastic member made of silicone disposed between the package member and at least one of said light emitting element and said optical element to vary the relative position between the light emitting element and optical element due to temperature changes such that changes in the angles of the output rays of the light emitting semiconductor device caused by temperature variations are reduced.
1 more element
Dependencies are inferred from the claim text.