Optical position sensor and isolation sensor using this position sensor
First Claim
1. An optical position sensor comprising:
- a light shading plate having a first slit and a second slit, as light introduction ports, defined therein, said first slit and said second slit intersecting each other; and
a light reception portion including a first unidimensional light reception sensor and a second unidimensional light reception sensor, said first and second unidimensional light reception sensors being disposed so as to oppose said light shading plate with a predetermined gap therebetween, said first and second unidimensional light reception sensors including a plurality of photo-electric conversion devices, said first unidimensional light reception sensor being disposed so as to cross only said first slit and said second unidimensional light reception sensor being disposed so as to cross only said second slit.
1 Assignment
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Accused Products
Abstract
In an optical position sensor capable of detecting a direction of incidence of light and intensity, this invention contemplates to make the sensor compact by reducing the number of pixels constituting light reception sensors and reducing the light reception area. To accomplish this object, a detection element portion 10 comprises a glass substrate 22, a light shading film 24 formed on a surface of the glass substrate 22 and having mutually criss-crossing slits 24a, 24b and a light reception portion 26 fixed to the back of the glass substrate 22. Unidimensional photo-diode arrays 26X, 26Y for receiving the slit beams passing through the slits 24a, 24b respectively, and a signal processing circuit 28 for scanning the photo-diode arrays 26X, 26Y and taking out light reception signals are disposed in the light reception portion 26.
120 Citations
27 Claims
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1. An optical position sensor comprising:
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a light shading plate having a first slit and a second slit, as light introduction ports, defined therein, said first slit and said second slit intersecting each other; and a light reception portion including a first unidimensional light reception sensor and a second unidimensional light reception sensor, said first and second unidimensional light reception sensors being disposed so as to oppose said light shading plate with a predetermined gap therebetween, said first and second unidimensional light reception sensors including a plurality of photo-electric conversion devices, said first unidimensional light reception sensor being disposed so as to cross only said first slit and said second unidimensional light reception sensor being disposed so as to cross only said second slit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An optical position sensor comprising:
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a light shading plate having two slits defined therein serving as light introduction ports, said slits being located such that said two slits intersect each other; and a light reception portion including a pair of unidimensional light reception sensors disposed so as to oppose said light shading plate with a predetermined gap therebetween, said pair of unidimensional light reception sensors being defined by a plurality of photo-electric conversion devices aligned in a manner so as to cross each of said slits at a position opposing each of said slits, wherein said two slits and said pair of photo-electric conversion devices perpendicularly cross one another, and wherein said two slits criss-cross each other, and said pair of photo-electric conversion device are arranged into an L shape.
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10. An optical position sensor comprising:
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a light shading plate having two slits defined therein serving as light introduction ports, said slits being located such that said two slits intersect each other; and a light reception portion including a pair of unidimensional light reception sensors disposed so as to oppose said light shading plate with a predetermined gap therebetween, said pair of unidimensional light reception sensors being defined by a plurality of photo-electric conversion devices aligned in a manner so as to cross each of said slits at a position opposing each of said slits, wherein said two slits and said pair of photo-electric conversion devices perpendicularly cross one another, wherein said two slits are arranged into an L shape, and said pair of photo-electric conversion device are arranged into an L shape. - View Dependent Claims (11, 12)
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13. An optical position sensor comprising:
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a light shading plate having two slits defined therein serving as light introduction ports, said slits being located such that said two slits intersect each other; a light reception portion including a pair of unidimensional light reception sensors disposed so as to oppose said light shading plate with a predetermined gap therebetween, said pair of unidimensional light reception sensors being defined by a plurality of photo-electric conversion devices aligned in a manner so as to cross each of said slits at a position opposing each of said slits; and a light transmissible filter covering said light shading plate.
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14. An isolation sensor comprising:
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a light shading plate having a first slit and a second slit, as light introduction ports, defined therein, said first slit and said second slit intersecting each other; and a light reception portion including a first unidimensional light reception sensor and a second unidimensional light reception sensor, said first and second unidimensional light reception sensors being disposed so as to oppose said light shading plate with a predetermined gap therebetween, said first and second unidimensional light reception sensors including a plurality of photo-electric conversion devices, said first unidimensional light reception sensor being disposed so as to cross only said first slits at a and said second unidimensional light reception sensor being disposed so as to cross only said second slit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An insolation sensor comprising:
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a light shading plate having two slits defined therein serving as light introduction ports, said slits being located such that said two slits intersect each other; and a light reception portion including a pair of unidimensional light reception sensors disposed so as to oppose said light shading plate with a predetermined gap therebetween, said pair of unidimensional light reception sensors being defined by a plurality of photo-electric conversion devices aligned in a manner so as to cross each of said slits at a position opposing each of said slits, wherein said two slits and said pair of photo-electric conversion devices perpendicularly cross one another, and wherein said two slits criss-cross each other, and said pair of photo-electric conversion device are arranged into an L shape. - View Dependent Claims (26)
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25. An insolation sensor comprising:
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a light shading plate having two slits defined therein serving as light introduction ports, said slits being located such that said two slits intersect each other; and a light reception portion including a pair of unidimensional light reception sensors disposed so as to oppose said light shading plate with a predetermined gap therebetween, said pair of unidimensional light reception sensors being defined by a plurality of photo-electric conversion devices aligned in a manner so as to cross each of said slits at a position opposing each of said slits, wherein said two slits and said pair of photo-electric conversion devices perpendicularly cross one another, wherein said two slits are arranged into an L shape, and said pair of photo-electric conversion device are arranged into an L shape.
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27. An insolation sensor comprising:
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a light shading plate having two slits defined therein serving as light introduction ports, said slits being located such that said two slits intersect each other; a light reception portion including a pair of unidimensional light reception sensors disposed so as to oppose said light shading plate with a predetermined gap therebetween, said pair of unidimensional light reception sensors being defined by a plurality of photo-electric conversion devices aligned in a manner so as to cross each of said slits at a position opposing each of said slits; and a light transmissible filter covering said light shading plate.
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Specification