Improvements in photoprinting lamps

(19)

(11)

EP 0 110 645 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	29.05.1985 Bulletin 1985/22

(43)	Date of publication A2:
	13.06.1984 Bulletin 1984/24

(21)	Application number: 83307089

(22)	Date of filing: 21.11.1983

(84)	Designated Contracting States:
	DE GB IT

(30)

Priority:

30.11.1982 GB 8234089

(71)	Applicant: THORN EMI plc
	()

(72)	Inventor:
	Page, Robert Brian ()

(54)	Improvements in photoprinting lamps

(57) The invention relates to discharge lamps and arc tubes therefor for the photoprinting industry. The lamp has an arc tube (12) enclosed in a sealed beam unit (11, 13) with a dichroic or aluminised layer selected to pass UV as the surface of the reflector thereof. The arc tube has a fill including Gallium and iron iodides to give a radiation spectrum especially suited to photoprinting.

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