Patent ID: 6817788
Filing Date: 2004-11-16
Classification: G03B

Abstract:
A diaphragm device, comprising:a diaphragm board having an aperture forming a light path; at least one diaphragm blade disposed on one face of the diaphragm board, and adjusting the aperture of the diaphragm for the light path by sliding along the board face; a diaphragm driving device driving the at least one diaphragm blade to adjust the aperture of the diaphragm for the light path; an optical filter having transmission characteristics in accordance with a wave length; and a filter driving device to insert the optical filter into and retract it from the light path, wherein said optical filter is formed in a thin film, disposed on one face side of said at least one diaphragm blade and provided slidably along said diaphragm blades.