Alignment apparatus
Abstract
Abstract AN ALIGNMENT APPARATUS HAVING A LASER LIGHT SOURCE WHICH PROVIDES AN OUTPUT BEAM FOR PROJECTION AT A REFLECTIVE SURFACE REMOTELY POSITIONED AT A TARGET OBJECT, A LOCALLY POSITIONED BEAM SENSING MEANS, AND A LOCALLY POSITIONED BEAM REFLECTIVE MEANS DISPOSED IN THE BEAM PATH FOR DIRECTING A REFLECTED BEAM AT SAID SENSING MEANS INCLUDES A BEAM POLARIZATION MEANS DISPOSED BETWEEN THE LIGHT SOURCE AND THE REMOTE REFLECTIVE SURFACE. THIS POLARIZING MEANS IS ADAPTED FOR ALTERING THE RELATIVE POLARIZATION OF THE OUTPUT AND REFLECTED BEAMS IN A MANNER FOR ATTENUATING INTERFERENCE FRINGES AT THE SENSING MEANS. THE LIGHT TRANSMISSION EFFICIENCY OF THIS ARRANGEMENT IS SUBSTANTIALLY ENHANCED BY UTILIZING A REFLECTIVE MEANS HAVING A POLARIZING SURFACE ADAPTED FOR TRANSMITTING LIGHT OF A FIRST POLARIZATION AND REFLECTING LIGHT OF A SECOND ORTHOGONAL POLARIZATION.
Inventors
- 👤 William R Smith-Vaniz
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |