Patent ID: 6643461
Filing Date: 2003-11-04
Classification: G03B

Abstract:
A photoflash projection device comprising:a housing defining an interior space and having an exterior surface; a multiplying circuit for receipt into the interior space of the housing; and a lamp, the lamp for engaging the housing and multiplying circuit, the lamp comprising: a straight, elongated, glass, gas-containing, flash discharge tube having a first end and second end, the two ends engaged in gas sealing relation by two electrodes; a reflector surface, the reflector surface adjacent and parallel to the straight flash discharge tube, the reflector surface having a profile defining a natural log function in a plane with a longitudinal axis of the reflector surface parallel to the longitudinal axis of the tube the profile between a maximal profile defined by Y=8.98 LN (Xâˆ’6)+2.34 and a minimum profile defined by Y=5.58 LN(Xâˆ’6)+1.30; and a pair of side reflector plates located at two removed ends of the reflector surface, whereby said multiplying circuit engages the tube to intermittently apply a potential difference across the electrodes of the tube sufficient to create a flash discharge therefrom.