(19)

(11)

EP 0 292 514 A1

(12)

(43) Date of publication: 30.11.1988 Bulletin 1988/48 (21) Application number: 87906924.0 (22) Date of filing: 28.10.1987

(51) International Patent Classification (IPC):  G01B 11/ 30( . ) H04N 5/ 222( . ) H04N 5/ 235( . ) G01N 3/ 42( . ) H04N 5/ 225( . ) (86) International application number: PCT/GB1987/000761 (87) International publication number: WO 1988/003345 (05.05.1988 Gazette 1988/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 30.10.1986 GB 19860025957 (71) Applicant: AUSTIN, Charles, Thomas Somerton, Somerset TA11 7DQ (GB)	(72) Inventor: AUSTIN, Charles, Thomas Somerton, Somerset TA11 7DQ (GB) (74) Representative: Muir, Ian R.  HASELTINE LAKE & CO. Hazlitt House 28 Southampton Buildings Chancery Lane London WC2A 1AT London WC2A 1AT (GB)