Abstract: A heads-up display device for a vehicle including a holographic projection optical system constituted by a transmissive holographic optical element and a holographic combiner constituted by a reflective holographic optical element, capable of reducing the number of constituting elements thereof and, thus, the total volume thereof. With the reduced volume, the holographic projection optical system is rotatable totally by use of a drive motor. By virtue of the rotatable construction of the holographic projection optical system, a driver can adjust properly the position of a reflected image indicative of various information projected onto the windshield of the vehicle, depending on the position of his eyes. A position sensor is provided for sensing the rotation of the holographic projection optical system beyond a predetermined range corresponding to a variation range of the position of driver's eyes.

Abstract: A head-up display for an automobile utilizing a light transmission hologram optical device as well as a light reflection hologram optical device. The head-up display is installed in a large truck or in a special freight car, such as a container car or a ready mixed concrete car, so that the head-up display informs a driver of information of conditions of dead ground of the car. The head-up display includes a hologram optical projection system and a holographic combiner. The projection system for projecting the light has a light source, an LCD for partially transmitting and shielding the light of the light source, and a light transmission hologram optical device for projecting the light. The holographic combiner for displaying the image includes a light reflection hologram optical device.

Abstract: The present invention is a type of office automation machine that is capable of copying a large size drawing by using an electronic photo method. The invention is designed to provide general printing function, a standard copying function, and a function of copying large size manuscripts such as design drawings. These functions are made possible by using a continuous printing paper in a reel form and by severing and discharging print output by an appropriate length. The printing paper is designed to refilled by a removable cassette. The transporting blades orbitally rotate to retrieve the developing agent from its container, so that the copying machine can be used efficiently and economically.