Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1989-09-14
1990-10-23
Buczinski, Stephen C.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
350174, 350540, 356 5, 356247, 356251, 356252, G01B 1126, G02B 2308, G01C 902
Patent
active
049647245
ABSTRACT:
A radiation mast such as a periscope has a head end 10 incorporating a radiation receiver in the form of a top mirror 12, the lower end 11 of the mast being physically separated by a considerable distance from end 10 and being provided with an information station, for example, in the form of viewing optics (E) and/or a video monitor 17. The radiation image formed at the receiver 12 is viewed at the information station in accurate superimposition with a reference pattern which is electronically generated by generator 19 and which is stabilized in space with respect to at least pitch, roll and yaw movements of the vehicle on which the mast is mounted. The pattern is also stabilized with respect to such disturbance factors as are effective on the information relaying means, for example, optics in path B, C, D, whereby the radiation image can be visually referenced to the electronically generated pattern, unwanted relative movements having been eliminated. The radiation receiver may also be in the form of a thermal imager 14 the output of which is electrically relayed to the information station and according to the nature of the information relaying means and the disturbance factors incident thereon the reference pattern may be coupled into the radiation image from the radiation receiver at any one of the radiation receiver, relaying means and the information station. The pattern generated by generator 19 may also be so arranged as to have a controlled drift rate in space.
REFERENCES:
patent: 3549231 (1970-12-01), Scidmore et al.
patent: 3715953 (1973-02-01), Allan
patent: 3997762 (1976-12-01), Ritchie et al.
patent: 4108551 (1978-08-01), Weber
patent: 4386848 (1983-06-01), Clendenin et al.
patent: 4398821 (1983-08-01), Steward
Barr & Stroud Limited
Buczinski Stephen C.
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