PHOTOGRAMMETRY AND OPTICAL METROLOGY 
( A J WC Gates 
\ $ Division of Mechanical and Optical Metrology 
National Physical Laboratory, England 
Optical measuring techniques developed recently at NPL 
have some possibilities of application in fields where 
photogrammetry has been used previously. Conversely, 
classical photogrammetric methods may be adapted to the 
measurement of structures recorded in novel ways. 
A selection of examples is presented, as follows. 
1 The principles of holographic measurement of 
displacement and strain. J M Burch. 
2 Experimental measurement of normal surface 
displacement by holography. E Archbold, A E Ennose 
3 Laser speckle photography for measuring tangential 
displacements of surface elements. E Archbold, 
A E Ennos. 
6 e 4 Moiré grid techniques for photographic recording 
and measurement. J M Burch, C Forno. 
5 White light speckle photography. (C Forno. 
6 Lens hologram techniques for analysing camera 
systems. J M Burch, C Forno, L H Tanner¥*. 
V i 7 Camera testing by the use of speckle patterns. 
L H Tanner*. 
8 Fine topographic structure in polished glass surfaces. 
K Lindsey. 
9 X-ray stereo microradiographye D J Pugh, P D West. 
10 Microtopographic measurement with the stereo 
electron microscope. D W Butler**, 
* Brighton Polytechnic, Department of Mechanical 
and Production Engineering, Moulsecoomb, 
Brighton, BN2 4GJ, Sussex. 
X* National Maritime Institute, Teddington, Middlesex, 
TW11 OLW. 
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