公开(公告)号：WO1985004778A1

公开(公告)日：1985-10-24

申请号：PCT/US1984001733

申请日：1984-10-29

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  FRANK, Lee, Fitzpatrick ,  KAISER, Donald, Frank

IPC: H04N03/36

CPC classification number: H04N3/36 ,  H05B41/34

Abstract: A film video player for producing a standard television signal from photographic film includes an image sensor for sensing a film image illuminated by a pulse of light from an electronic strobe light. The electronic strobe light includes a high voltage power supply with a voltage greater than the minimum ignition voltage of a flash tube in the strobe light for igniting an arc in the flash tube, a low voltage power supply having a voltage less than the minimum ignition voltage of the flash tube for producing an extended pulse of light of constant intensity, means including a photocell for sensing the quantity of light produced by the flash tube and including a control device in series with the flash tube for terminating the pulse of light after a predetermined quantity of light is produced, and means for dispersing the light from the flash tube to produce more uniform illumination. The film video player has the advantage of providing a video signal free from visible flicker, of uniform intensity, and constant color balance. A further advantage is that the video player generates very little heat from its electronic strobe light source and therefore requires minimal cooling.