INFRA-RED LENSES AND METHODS OF FABRICATION - Patent 0227784

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EP 0 227 784 A1

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(43)	Date of publication:
	08.07.1987 Bulletin 1987/28

(21)	Application number: 86904276.0

(22)	Date of filing: 04.07.1986

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International Patent Classification (IPC):

G02B 1/ 02^{( . )}
G02B 13/ 14^{( . )}

G02B 3/ 08^{( . )}

(86)	International application number:
	PCT/GB1986/000389

(87)	International publication number:
	WO 1987/000297 (15.01.1987 Gazette 1987/01)

(84)	Designated Contracting States:
	AT BE CH DE FR GB LI LU NL SE

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Priority:

04.07.1985 GB 19850017012

(71)	Applicant: PLESSEY OVERSEAS LIMITED
	Ilford Essex IG1 4AQ (GB)

(72)	Inventor:
	PEDDER, David, John Oxford OX2 8BT (GB)

(74)	Representative: Johnson, Reginald George
	The Plessey Company plc Intellectual Property Department Vicarage Lane Ilford Essex IG1 4AQ Ilford Essex IG1 4AQ (GB)

(54)	INFRA-RED LENSES AND METHODS OF FABRICATION