(19)
(11) EP 0 398 736 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.11.1991 Bulletin 1991/47

(43) Date of publication A2:
22.11.1990 Bulletin 1990/47

(21) Application number: 90305380.9

(22) Date of filing: 18.05.1990
(51) International Patent Classification (IPC)5: F41J 5/02, H01L 31/12, H01L 25/075
(84) Designated Contracting States:
DE FR GB SE

(30) Priority: 19.05.1989 FI 892414

(71) Applicant: Kuronen, Henry Ilari
SF-03300 Härkälä (FI)

(72) Inventor:
  • Kuronen, Henry Ilari
    SF-03300 Härkälä (FI)

(74) Representative: Butler, Michael John et al
FRANK B. DEHN & CO. Imperial House 15-19 Kingsway
London, WC2B 6UZ
London, WC2B 6UZ (GB)


(56) References cited: : 
   
       


    (54) Method and apparatus for indicating the position of impact of light on a target


    (57) A target (1) comprises an array of electro-optical devices (3) such as light-emitting diodes, disposed within light impervious tubes (4). When a ray of light impinges on one of the devices (3) it is detected. Control circuitry (6) then causes the device to emit visible light so as to indicate the point of impact. The target can be for use in optical shooting or can be used as an optical drawing board (8) in conjunction with a light pen (9).







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