(19)

(11)

EP 0 172 223 A1

(12)

(43) Date of publication: 26.02.1986 Bulletin 1986/09 (21) Application number: 85901168.0 (22) Date of filing: 30.01.1985

(51) International Patent Classification (IPC):  G01C 19/ 70( . ) (86) International application number: PCT/US1985/000155 (87) International publication number: WO 1985/003569 (15.08.1985 Gazette 1985/18)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 08.02.1984 US 19840578112 (71) Applicant: SUNDSTRAND OPTICAL TECHNOLOGIES, INC. Newbury Park, CA 91320 (US)	(72) Inventor: STJERN, Daryl, C. Thousand Oaks, CA 91360 (US)