Browse Prior Art Database

Scanning Mirror Imaging System

IP.com Disclosure Number: IPCOM000078578D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Voit, WF: AUTHOR

Abstract

Fig. 1 represents a scanning Mirror system with an image position on a photoconductor drum 1, somewhere between the 4 and 6 o'clock position.

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Scanning Mirror Imaging System

Fig. 1 represents a scanning Mirror system with an image position on a photoconductor drum 1, somewhere between the 4 and 6 o'clock position.

Two approaches considered are shown in Figs. 2a and 2b. In Figs. 1 and 2a, two mirrors 2 and 3 are attached to a common carriage 4, whereas in Fig. 2b mirrors 5 and 6 are separate and smaller. For maximum image integrity during scanning keeping the mirrors together on a common carriage is preferable. Mirrors mounted as in Fig. 1 can be rotated about a line formed by the intersection of the two mirror surfaces with no effect on the image. This characteristic is used in Fig. 1 to minimize the size of the mirrors and thus the moving mass. As the image is scanned onto the drum by moving the mirror assembly from right to left, Fig. 1, the mirror assembly is simultaneously rotated clockwise. This increases the length of mirror 3 nearest lens 7 and decreases the length of mirror 2.

Since there is a significant difference in mirror width at these points, the trade-off nets a reduction in the mirror surface area and therefore mass.

The system utilizes dual tapes 8 and 9 for driving, each tape typically having dimensions of 0.003'' X 0.660'', to achieve the necessary stiffness and stability.

An analysis of the mirror deflections during peak acceleration, shows 0.375'' thick mirrors to be sufficiently rigid to assure a good quality image.

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