Experience suggests that the seemingly explicit term ‘alignment’ is capable of varying interpretations depending upon the discipline in which one is working. For example, the surveyor might regard alignment of a road as setting out markers to define the path that it is intended to follow; this may be neither straight nor level. The engineer constructing very large electricity generating plant is much concerned with the relative alignment of the individual units of which it is comprised. Normally this is a straight line in plan, but in elevation it may more nearly resemble a catenary.


National Physical Laboratory Zone Plate Beam Expander Alignment Technique Fresnel Zone Plate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Encyclopaedia Britannica, 11th edn, 25–26, 557–72.Google Scholar
  2. 2.
    Dagnall, R. H. and Pearn, B. S. Optical Alignment, 1967, Hutchinson. London.Google Scholar
  3. 3.
    Harrison, P. W., Tolmon, F. R. and New, B. M. Proc. Inst. CE, 52 (1972), 1–24.CrossRefGoogle Scholar
  4. 4.
    Harrison, P. W. Civ. Eng. Public Works Rev., 68 (1973), 224–7.Google Scholar
  5. 5.
    Harrison, P. W. Survg. Techn., 6 (1978), 6–7.Google Scholar
  6. 6.
    Hewlett-Packard. Measurement of straightness of travel. Laser MeasurenlentSystem Application Note 156–5, 1976.Google Scholar
  7. 7.
    Tolmon, F. R. Proc. Conf: Nelex, 76 (1976).Google Scholar
  8. 8.
    Harrison, P. W. Wat. Pwr. Dam Constr., 30 (1978), 52.Google Scholar
  9. 9.
    Van Milaan, A., TNO-Nieuws, 19 (1964), 471–6.Google Scholar
  10. 10.
    Bennett, S. J. and Gates, J. W. C., J. Phys. E., 3 (1970), 65–8.CrossRefGoogle Scholar
  11. 11.
    New, B. M. Appl. Opt., 13 (1974), 937–41.Google Scholar
  12. 12.
    Cooper, M. A. R. Modern Theodolites and Levels, 1971, Crosby Lockwood, St. Albans, UK.Google Scholar
  13. 13.
    Harrison, P. W. Proc. Conf. Laser 78, 1978, Publ. Engineers Digest, London.Google Scholar

Copyright information

© Applied Science Publishers Ltd 1983

Authors and Affiliations

  • P. W. Harrison
    • 1
  1. 1.Hampton, MiddlesexUK

Personalised recommendations