(19)

(11)

EP 0 148 229 A1

(12)

(43) Date of publication: 17.07.1985 Bulletin 1985/29 (21) Application number: 84902573.0 (22) Date of filing: 27.06.1984

(51) International Patent Classification (IPC):  G01J 5/ 48( . ) G02B 27/ 00( . ) G02B 26/ 10( . ) (86) International application number: PCT/AU1984/000118 (87) International publication number: WO 1985/000435 (31.01.1985 Gazette 1985/03)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 30.06.1983 AU 19830000054 (71) Applicant: THE COMMONWEALTH OF AUSTRALIA Canberra, Australian Capital Territory 2600 (AU)	(72) Inventor: MCQUISTAN, Gavin, William Magill, S.A. 5072 (AU) (74) Representative: Opperman, Stuart Richard, et al  Haseltine Lake & Co. Hazlitt House 28 Southampton Buildings Chancery Lane London WC2A 1AT London WC2A 1AT (GB)