Abstract: An image photographing apparatus for automatically focusing a photographed image to improve the image quality. The image photographing apparatus automatically focuses the image through a zoom actuator for changing a zoom ratio and a focus actuator for controlling the focus to thereby enhance the image quality. Also, the image photographing apparatus adds a zooming function to diversify the application fields of image photographing.

Abstract: The present invention relates to a precisely actuating member and an image tilting device and a projection system having them, more particularly, to a projection system comprising a precisely actuating member formed in a one-piece unit to permit a precise rotation movement, an image tilting device for increasing the resolution by precisely adjusting the angle of an image, and a projection system having them. The image tilting device according to the preferred aspect of the present invention comprises a casing. The precisely actuating member is housed in the casing to be integrated therewith for precise reciprocation. A driving member contacts to the precisely actuating member for the movement of the actuating member. A light path conversion member is located on the precisely actuating member to convert the light path by a precise movement.

Abstract: An image photographing apparatus for automatically focusing a photographed image to improve the image quality. The image photographing apparatus automatically focuses the image through a zoom actuator for changing a zoom ratio and a focus actuator for controlling the focus to thereby enhance the image quality. Also, the image photographing apparatus adds a zooming function to diversify the application fields of image photographing.

Abstract: A high resolution lens is provided as a condensing lens for collecting light made incident from a light source, of which one face is plane and the other face is curved. The curved face of the lens is coated with a reflecting material except for its central apex portion, and incident light is made incident through the plan portion of the lens. The curved face of the high resolution lens may be spherical or is a parabolic face to reduce aberration. When a parallel light is made incident on the plane face of the high resolution lens, it is reflected in the lens and totally reflected, and then is transmitted through the uncoated apex to an external object.