Apparatus and method for measuring the included angle of a reflective cone
First Claim
1. Apparatus for measuring the included angle of a reflective cone between opposite sides of said reflective cone, comprising:
- means for illuminating the curved surface of said reflective cone with a collimated beam of light, said beam of light being generally parallel to the axis of said cone,lens means for receiving directly a portion of the light reflected from a first side of said cone, and for focusing the portion of the light so received in a reference plane,retro-reflective means, positioned on the side of said cone opposite said lens means, for receiving directly a portion of the light reflected from a second side of said cone and redirecting said light to said lens means substantially parallel to the light reflected from said second side of said cone, said second side of said cone being opposite to said first side of said cone, andlight detection means at the focal point of said lens means for displaying the light received by said lens means, whereby the spacing between the light received from said retro-reflective means and the light received directly from said cone is related to said included angle between said first and second sides of said reflective cone.
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Accused Products
Abstract
An apparatus and method are provided for measuring the included angle of a reflective cone between opposite sides of the reflective cone. The apparatus includes means for illuminating the curved surface of the reflective cone with a collimated beam of light, the beam of light being generally parallel to the axis of the cone. A lens receives directly a portion of the light reflected from a first side of the cone, and focuses the portion of the light so received in a reference plane. A retro-reflective mirror arrangement, positioned on the side of the cone opposite the lens, receives directly a portion of the light reflected from a second side of the cone and redirects the light to the lens in a direction parallel to the light reflected from the second side of the cone. The second side of the cone is opposite to the first side of the cone. A light detection arrangement at the focal point of the lens displays the light received by the lens, whereby the spacing between the light received from the retro-reflective mirror arrangement and the light received directly from the cone is related to the included angle between the first and second sides of the reflective cone.
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Citations
20 Claims
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1. Apparatus for measuring the included angle of a reflective cone between opposite sides of said reflective cone, comprising:
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means for illuminating the curved surface of said reflective cone with a collimated beam of light, said beam of light being generally parallel to the axis of said cone, lens means for receiving directly a portion of the light reflected from a first side of said cone, and for focusing the portion of the light so received in a reference plane, retro-reflective means, positioned on the side of said cone opposite said lens means, for receiving directly a portion of the light reflected from a second side of said cone and redirecting said light to said lens means substantially parallel to the light reflected from said second side of said cone, said second side of said cone being opposite to said first side of said cone, and light detection means at the focal point of said lens means for displaying the light received by said lens means, whereby the spacing between the light received from said retro-reflective means and the light received directly from said cone is related to said included angle between said first and second sides of said reflective cone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for measuring the included angle of a reflective cone between opposite, first and second sides of said reflective cone, comprising the steps of:
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illuminating the curved surface of said reflective cone with a collimated beam of light, said beam of light being generally parallel to the axis of said cone, receiving a portion of the light reflected from said second side of said cone and redirecting said light in a direction generally parallel to the light reflected from said second side of said cone, positioning a lens so as to focus in a reference plane a portion of the light reflected from a first side of said cone, and a portion of the redirected light from the second side of said cone, and displaying in the reference plane the light received by said lens, whereby the spacing between the light received from said first and second sides of said cone is related to said included angle. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification