Abstract: A copying machine for making a hard copy of an original comprises an image sensor for reading an image of the original to provide image signals, a memory for memorizing the image signals after or before processing the image signals for necessary corrections, and a printer for printing an image on a copying sheet according to the image signal after image processing. Preferably, a thermal printing head and a heat sensitive sheet are used. The copying machine is compact and either is incorporated in a portable overhead projector or is used as a writing board copy machine. In the former case, the image sensor is disposed in a supporting arm for supporting an image projection lens assembly above a base section of the overhead projector on which a transparent original is placed.

Abstract: A light projector for a distance measuring device comprises a lens barrel holding projecting lenses and a lamp housing rotatably engaged with the lens barrel. The lamp housing containing a flash lamp comprises a front cover having a tube engaged with the lens barrel, and a back cover secured to the front cover. In the front cover, a slit is provided, with its center aligned with an optical axis of the projecting lenses, the longitudinal sides thereof being arranged precisely perpendicular to a base line of a distance measuring device. Between the lamp housing and the lens barrel, an inclination adjusting member is disposed. When the inclination adjusting member is rotated with a screwdriver, or a wrench, the lamp housing rotates about the optical axis of the projecting lenses, permitting the inclination of the slit light to be adjusted.