EXPOSURE CONTROL SYSTEM USING PULSE WIDTH MODULATION - Patent 0731934

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EP 0 731 934 A1

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(43)	Date of publication:
	18.09.1996 Bulletin 1996/38

(21)	Application number: 95921488.0

(22)	Date of filing: 26.05.1995

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International Patent Classification (IPC):

G03B 7/ 10^{( . )}

G03B 7/ 26^{( . )}

(86)	International application number:
	PCT/US1995/006792

(87)	International publication number:
	WO 1995/033226 (07.12.1995 Gazette 1995/52)

(84)	Designated Contracting States:
	DE FR GB IT

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Priority:

27.05.1994 US 19940250434

(71)	Applicant: POLAROID CORPORATION
	Cambridge, Massachusetts 02139-3589 (US)

(72)	Inventors:
	COOLEY, Amanda Watertown, MA 02172 (US) STRIZHAK, Elliott, S. Framingham, MA 01701 (US)

(74)	Representative: Skone James, Robert Edmund
	GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)

(54)	EXPOSURE CONTROL SYSTEM USING PULSE WIDTH MODULATION