Reflection-type photoelectric switching apparatus
First Claim
1. In a reflection-type photoelectric switching apparatus having a light projecting device for projecting a beam of light to an object, a light receiving photoelectric device arranged in side-by-side relation with said light projecting device for receiving a reflected light ray from said object, a circuit device operative in response to output signals from said light receiving device for generating a switching output signal, and a housing for enclosing said light projecting and receiving devices and circuit device,the improvement comprising an optical axis adjusting means which is controllable from outside of said housing for adjusting the optical axis of at least one of said light projecting and receiving devices,said circuit device being coupled to the receiving device and having a predetermined detection level,said light projecting and receiving devices respectively having optical members which allow both the light beam from said projecting device and the light beam incident on said receiving device to pass within a predetermined light path having a predetermined effective zone so that said two light beams will be crossed in a desired detection field, andthe distance from said photoelectric switching apparatus to said desired detection field being continuously variable by said optical axis adjusting means.
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Accused Products
Abstract
A reflection-type photoelectric switching apparatus for providing an electric switching signal indicating existance information of an object to be detected thereby comprising a light projecting device for projecting a beam of light to the object, a light receiving photoelectric device arranged in side-by-side relation with the light projecting device for receiving a reflected light from the object, an optical axis adjusting means which is controllable from outside of housing of the apparatus for adjusting the optical axes of the light projecting and receiving devices, and optical members which allow both the light beam from the projecting device and the light beam to be incident on the receiving device to pass within a predetermined light path so that the two light beams will be crossed in a desired detection field, the distance from the apparatus to the desired detection field being continuously variable by the optical axis adjusting means.
73 Citations
11 Claims
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1. In a reflection-type photoelectric switching apparatus having a light projecting device for projecting a beam of light to an object, a light receiving photoelectric device arranged in side-by-side relation with said light projecting device for receiving a reflected light ray from said object, a circuit device operative in response to output signals from said light receiving device for generating a switching output signal, and a housing for enclosing said light projecting and receiving devices and circuit device,
the improvement comprising an optical axis adjusting means which is controllable from outside of said housing for adjusting the optical axis of at least one of said light projecting and receiving devices, said circuit device being coupled to the receiving device and having a predetermined detection level, said light projecting and receiving devices respectively having optical members which allow both the light beam from said projecting device and the light beam incident on said receiving device to pass within a predetermined light path having a predetermined effective zone so that said two light beams will be crossed in a desired detection field, and the distance from said photoelectric switching apparatus to said desired detection field being continuously variable by said optical axis adjusting means.
Specification