Flux distribution correcting device of flash discharging light emitting device

Abstract

Abstract PURPOSE:To prevent exposure irregularity in synchronous flash photography at short distance by expanding automatically an illuminated area in accordance with the adjustment of focus of the photographic lens of a camera capable of focus matching to a short-distance subject. CONSTITUTION:A light emitting device 1 is equipped with an automatic dimming mechanism which determines the quantity of light emission according to subject reflected light, and also has a flux distribution correcting mechanism 1b which switches a light emission part 1a from standard lighting to wide-angle lighting to correct the lighting area. This flux distribution correcting mechanism 1b includes an electric driving device which varies the emission angle of flash lighting from theta1-theta2 in response to an electric signal sent out of the camera. Consequently, the focus adjustment is made corresponding to the short-distance subject to widen the lighting area, preventing exposure irregularity in short- distance synchronous flash photography.

Inventors

• 👤 Yoshiyuki Takematsu
• 👤 良行 竹松

Bibliographic Details