Claims
- 1. A sheet material sensor system comprising:
- illuminator means for producing a beam of optical energy at a first frequency, said illuminator means being arranged to direct said beam of optical energy toward a first side of the sheet material;
- photo-receiver means for producing an output signal and responsive to optical energy received at a second frequency, said photo-receiver means being arranged on said first side of the sheet material; and
- light converter means arranged on a second side of the sheet material for converting said beam of optical radiation at said first frequency impinging thereon to a reflected beam of optical radiation at said second frequency.
- 2. The sheet material sensor system of claim 1 wherein said illuminator means comprises:
- source means for emitting said optical radiation at said first frequency;
- filter means for propagating optical radiation for said source means in a predetermined range of frequencies in the vicinity of said first frequency; and
- lens means for forming a beam of said optical radiation.
- 3. The sheet material sensor system of claim 1 wherein said photo receiver means comprises:
- focusing lens means for converging received optical radiation;
- sensor filter means for transmitting optical radiation in a predetermined range of frequencies in the vicinity of said second frequency; and
- a sensor element for producing a signal responsive to said optical radiation in said predetermined range of frequencies in the vicinity of said second frequency.
- 4. The sheet material sensor system of claim 1 wherein said light convertor means comprises a fluorescing paint layer arranged on the upper side of the sheet material from said illuminator means and said photo receiver means.
- 5. A sheet material sensor system comprising:
- illuminator means for producing a beam of optical energy at a first frequency, said illuminator means being arranged to direct said beam of optical energy toward a first portion of the sheet material;
- photo-receiver means for producing an output signal and responsive to optical energy received at a second frequency, said photo-receiver means begin arranged adjacent said first portion of the sheet material; and
- light converter means arranged adjacent a second portion of the sheet material for converting said beam of optical radiation at said first frequency impinging thereon to reflected beam of optical radiation at said second frequency.
- 6. A sheet material sensor system comprising:
- illuminator means for producing a beam of optical energy at a first frequency, said illuminator means being arranged to direct said beam of optical energy toward a side of the sheet material;
- photo-receiver means for producing an output signal and responsive to optical energy received at a second frequency, said photo-receiver means being arranged adjacent said side of the sheet material; and
- light converter means arranged so that it is selectively covered by a portion of the sheet material for converting said beam of optical radiation at said first frequency impinging on an uncovered surface thereof to a reflected beam of optical radiation at said second frequency.
Parent Case Info
This is a division of application Ser. No. 794,951 filed Nov. 1, 1985, which in turn is a continuation of application Ser. No. 570,744, filed 1/16/84, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
2567049 |
Belluche |
Sep 1951 |
|
3105908 |
Burkhardt et al. |
Oct 1963 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
794951 |
Nov 1985 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
570744 |
Jan 1984 |
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