公开(公告)号：WO1994020884A1

公开(公告)日：1994-09-15

申请号：PCT/US1993011678

申请日：1993-12-02

Applicant: BLACK & VEATCH ARCHITECTS, INC.

Inventor： BLACK & VEATCH ARCHITECTS, INC. ,  WALLY, Joseph, H, Jr. ,  PACE, Herbert, W.

IPC: G03B27/48

CPC classification number: G03B27/48

Abstract: A flow camera equipped with a microprocessor based control system accepts large original documents (22) in continuous, moving fashion and photographs them through a specifically shaped slotted aperture (182, 186) positioned between the original document (22) and an objective lens (190). The originals are illuminated during exposure simultaneously from the front and the back, recording congruent images from two-sided material such as engineering drawings on transluscent media having positionally related information on both sides. The light from the underneath side, opposite the lens (190) not only reveals and exposes the image on the second side but it enhances the quality and sharpness of the primary image on the side towards the lens. Avoidance of image loss is accomplished by using in the optical system a single mirror (188) which deflects the optical path substantially less than 90 DEG . Servomotors with encoder feedback are correlated by the microprocessor to the degree of photographic reduction so that the ratio of speed between the original document (22) and the moving strand of film is exactly equal to the reduction ratio to avoid speed induced distorsion in the reduced and enhanced film image.

Abstract translation: 配备有基于微处理器的控制系统的流动摄像机以连续，移动的方式接收大的原稿（22），并通过位于原始文件（22）和物镜（190）之间的特定形状的开槽孔（182,186）照相它们 ）。 原稿在曝光的同时从前面和后面照亮，从双面材料（例如工程图纸）记录在两侧具有位置相关信息的平移介质上的全部图像。 来自下侧的，与透镜（190）相对的光不仅揭示和曝光第二面上的图像，而且增强了主要图像在朝向透镜的一侧上的质量和清晰度。 图像丢失的避免是通过在光学系统中使用单个反射镜（188）实现的，该反射镜使光路大大小于90°。 具有编码器反馈的伺服电动机通过微处理器与照相还原程度相关联，使得原始文件（22）和胶片的移动线之间的速度比正好等于减速比，以避免减速和 增强电影形象。