Patent ID: 7668453

Claim:
An image taking apparatus including an imaging device that generates image data by reading a subject image formed on an imaging surface thereof and an image taking optical system that forms subject light on the imaging surface, and generating image data in accordance with image taking operation, the image taking apparatus comprising: a light quantity control device that is arranged on an optical path of the subject light and controls transmitted volume of the subject light, the light quantity control device comprising: a light quantity control layer that expands and contracts in accordance with an electric field generated in the light quantity control layer and thereby changes the transmitted volume of the subject light; and a pair of light-transmissive electrodes that are disposed so as to sandwich the light quantity control layer, and generate an electric field in the light quantity control layer, in response to application of voltage, thereby causing the light quantity control layer to expand and contract wherein the light quantity control layer is made of liquid crystal elastomer in which light-absorbing pigments are dispersed, and changes the transmitted volume of the subject light by changing the number of the pigments per unit area in a plane across the optical path of the subject light in accordance with expansion and contraction of the light quantity control layer.