| 摘要 |
PURPOSE:To clean up a photosensitive surface, to remove defective exposure due to dust or the like and to accurately expose information by providing a photoplotter with a dust removing means for removing dust or the like adhering to the photosensitive surface of a photosensitive film prior to exposure. CONSTITUTION:The photoplotter mainly consists of a stock part 4 for storing an unexposed photosensitive film 16, an exposing part 5 for relatively moving the unexposed photosensitive film 16 extracted from the stock part 4 and an optical system and exposing required information to the surface of the film 16 and a developing part 6 for developing the exposed image formed by the exposing part 5. The dust removing means such as a vacuum 23 or a high pressure air blowing means to remove dust or the like adhering to the surface of the unexposed film 16 is added to clean up the photosensitive surface prior to exposure. Consequently, a highly reliable photoplotter capable of accurately plotting the information can be obtained. |
