| 摘要 |
FIELD: optical devices for drawing from nature or copying. SUBSTANCE: the first version of optical device for drawing has plotting board, system of mirrors, eyepiece and platform turning relative to eyepiece sighting axis. Mirrors are installed on platform. Objective lens mirror is rotatable round its center. The second version differs from the first one by provision of translucent eyepiece mirror. Monoimage is produced when draftsman operates with the device of the first version by two eyes, and with the device of the second version, by one eye. EFFECT: device is compact and offers extended adjustment range, simple in adjustment and convenient in operation. 1 dwg |
