| 摘要 |
FIELD: device is used for graphic works fulfillment and study of perspective images and is designed for drawing from life or for copying with production of mirror image. SUBSTANCE: face side of plotboard 1 has ocular 3 mounted on holder 2. Turning semitransparent mirror 4 is placed on ocular 3 optical axis AO. To make drawing of spatial object 8 without distortions of ocular 3 optical axis AO branch, that is passing through semitransparent mirror 4, is directed to plotboard 1 and is perpendicular to its plane; or deflected by semitransparent mirror 4 optical axis AO branch is directed to plotboard 1 and perpendicular to its plane. To copy flat original semitransparent mirror 4 is mounted at equal angles of inclination to planes of original and plotboard 1 and branches of optical axis are directed to plotboard and original. Object or original may be arbitrarily located in space. Device allows to select composition and scale of drawing before beginning of drawing. EFFECT: device allows to make drawing of spatial objects without distortions. 4 cl, 3 dwg |
