Irradiating light quantity controller

TLDR: In this article, the authors propose to always give an appropriate irradiating light quantity with high accuracy even if a light source whose pulse light emission time is short is used, by enlarging the pulse width of a pulse light beam, and radiating the light quantity within a prescribed range in one width, onto an irradiated surface.

Abstract: PURPOSE:To always give an appropriate irradiating light quantity with high accuracy even if a light source whose pulse light emission time is short is used, by enlarging the pulse width of a pulse light beam, and radiating the light quantity within a prescribed range in one width, onto an irradiated surface CONSTITUTION:As for a pulse light beam from a light source 1, its pulse width is enlarged a pulse width enlarging means 2, and by an illuminating optical system 4, the pulse light beam is projected onto an irradiated surface 7 through a semi-transmission mirror 5 That is to say, from the time t1, printing is started In such case, as soon as printing is started, the light quantity projected onto the irradiated surface 7 is subjected to integration and by a light quantity detecting means 6, and an output signal is inputted to a light quantity control means 10 It said light quantity becomes predetermined quantity, for instance when it reaches the time t2 in one pulse width, the light quantity control means 10 closes an optical shutter 3 In such way, the control is executed so that the irradiate light quantity to the surface 7 always makes a correct exposure