REFLECTION TYPE OPTICAL SENSOR AND METHOD FOR DETECTING SURFACE ROUGHNESS
First Claim
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1. A reflection type optical sensor, comprising:
- a housing, a light emitting and receiving unit located adjacent the housing and including, a light emitting unit having an optical axis in a light emission direction, and a light receiving unit having an optical axis in a light reception direction and configured to sense light received from the light emitting unit, the light emitting unit and the light receiving unit being configured such that the optical axis of the light emitting unit in the light emission direction intersects at an intersection location and at a predetermined angle with the optical axis of the light receiving unit in the light reception direction, wherein the light emitting and receiving unit is configured to be movable with respect to the housing.
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Abstract
A reflection type optical sensor can include a light emitting and receiving unit. The light emitting and receiving unit can include both a light emitting unit and a light receiving unit having light receiving sensitivity to light emitted from the light emitting unit. The light emitting unit and the light receiving unit can be arranged such that the optical axis of the light emitting unit intersects at a predetermined angle with the optical axis of the light receiving unit. The light emitting and receiving unit can be movably supported.
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Citations
19 Claims
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1. A reflection type optical sensor, comprising:
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a housing, a light emitting and receiving unit located adjacent the housing and including, a light emitting unit having an optical axis in a light emission direction, and a light receiving unit having an optical axis in a light reception direction and configured to sense light received from the light emitting unit, the light emitting unit and the light receiving unit being configured such that the optical axis of the light emitting unit in the light emission direction intersects at an intersection location and at a predetermined angle with the optical axis of the light receiving unit in the light reception direction, wherein the light emitting and receiving unit is configured to be movable with respect to the housing. - View Dependent Claims (2, 3, 4)
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5. A reflection type optical sensor, comprising:
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a light emitting and receiving unit including a light emitting unit having an optical axis in a light emission direction and a light receiving unit having an optical axis in a light reception direction and configured to sense light received from the light emitting unit, the light emitting unit and the light receiving unit being configured such that the optical axis of the light emitting unit in the light emission direction intersects at an intersection location and at a predetermined angle with respect to the optical axis of the light receiving unit in the light reception direction; and
a supporting member configured to be movable with respect to the light emitting and receiving unit to movably support an object to be measured such that a surface of the object is movable in a direction perpendicular to the surface. - View Dependent Claims (6, 7, 8)
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9. A reflection type optical sensor, comprising:
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a light emitting unit having an optical axis; and
two light receiving units each having an optical axis and configured to sense light received from the light emitting unit, wherein the light emitting unit and the two light receiving units are configured such that each of the optical axes of the light receiving units intersects the optical axis of the light emitting unit at a substantially identical predetermined angle, thereby detecting reflected light. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for detecting surface roughness of a measuring surface, comprising:
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providing a light emitting unit, a light receiving unit, an object to be measured, and a storage device including a first storage area and a second storage area;
irradiating the object to be measured with light from the light emitting unit and receiving reflected light from the object by the light receiving unit;
storing a first output from the light receiving unit in the first storage area;
changing a distance between the light emitting unit and the object;
irradiating the object with light from the light emitting unit after the distance is changed, and receiving reflected light from the object by the light receiving unit;
storing a second output from the light receiving unit in the second storage area;
performing computation using the first output and second output stored in the first and second storage areas, respectively; and
outputting results of the computation.
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18. A method for detecting surface roughness, comprising:
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providing a light emitting and receiving unit including a light emitting unit and a light receiving unit, an object to be measured, and a storage device including a first storage area and a second storage area;
placing the light emitting and receiving unit at a predetermined position relative to the object to be measured;
irradiating the object with light from the light emitting unit and receiving reflected light from the object by the light receiving unit;
outputting a first signal from the light receiving unit in accordance with an amount of the reflected light received;
storing a first output from the light receiving unit in the first storage area;
changing a distance between the light emitting and receiving unit and the object;
irradiating the object with light from the light emitting unit after the distance is changed and receiving second reflected light from the object by the light receiving unit;
outputting a second signal from the light receiving unit in accordance with an amount of the second reflected light received;
storing a second output from the light receiving unit in the second storage area;
performing predetermined computation using the first and second outputs stored in the first and second storage areas, respectively;
outputting results of the computation; and
outputting data for surface roughness based on the outputted results.
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19. A method for identifying a material, comprising:
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providing a light emitting and receiving unit including a light emitting unit and a light receiving unit, an object to be measured, and a storage device including a first storage area and a second storage area;
placing the light emitting and receiving unit at a predetermined position relative to the object to be measured;
irradiating the object with light from the light emitting unit and receiving reflected light from the object by the light receiving unit;
outputting a first signal from the light receiving unit in accordance with an amount of the reflected light received;
storing a first output from the light receiving unit in the first storage area;
changing a distance between the light emitting and receiving unit and the object;
irradiating the object with light from the light emitting unit after the distance is changed and receiving second reflected light from the object by the light receiving unit;
outputting a second signal from the light receiving unit in accordance with an amount of the second reflected light received;
storing a second output from the light receiving unit in a second storage area;
performing predetermined computation using the first and second outputs stored in the first and second storage areas, respectively;
outputting results of the computation; and
comparing the outputted results with predetermined standard data and estimating a type of the object, whereby material type identification of the object is performed.
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Specification