| 摘要 |
The exposure process and apparatus are for use with electrophotographic copying machines of the type in which a photosensitive surface is moved at a constant rate at any magnification selected. Upon changing from a magnification of unity to a magnification of beta , a lens means arrangement which may be of any type, e.g., a customary lens, a variable focus lens, a lens of in-prism or in-mirror construction, is displaced, in a direction perpendicular to the optical axis thereof at unity magnification, by a distance which is determined in accordance with beta and another factor so that the same position for placement of an original to be copied on a holder such as a glass plate, can be maintained as the magnification is varied.
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