Image transfer device

Abstract

Spherical convex micro-lenses are arranged between rectangular grooves adjacent to each other of a lens plate. The arrangement of convex micro-lenses is made to be in parallel with the short-side direction of the lens plate, namely, the direction of the rectangular grooves. Since stray light appears mainly on the convex micro-lenses arranged in the long-side direction of the lens plate, the stray light to appear in the long-side direction of the lens plate is removed by forming grooves at regular intervals in the long-side direction of the lens plate and forming a light absorbing film in each of the rectangular grooves. Or the stray light to appear in the long-side direction of the lens plate is removed by making the direction of arrangement of convex micro-lenses different from the long-side direction of the lens plate.

Description

[0001] This application is a divisional application of the patent application with the application number 200410063414.5, the application date is July 1, 2004, and the invention title is "lens plate and its manufacturing method and image transmission device". [0002] technology neighborhood [0003] The invention relates to an image transmission device which transmits an image to a linear imaging area by using a erecting lens array formed by a combined lens plate. Background technique [0004] In terms of the optical system of the device for reading images, there are reduction system and equal magnification system. The lens array used in the equal magnification system is a positive image equal magnification lens array, and usually in the long side direction of the lens array (the main scanning direction of the image readout device), the rod lenses are arranged in series. By increasing the number of lens rows, the light transmission rate can be improved and the unevenness of ...

AI Technical Summary

Problems solved by technology

Therefore, in order to remove obliquely incident light to the lens, stray light emitted from the exit side adjacent to the lens plate through the thickness direction of the lens plate to form a necessary light-shielding layer, it is difficult to obtain grooves with a required aspect ratio.

[0010] Therefore, with the existing resin lens plate erecting equal magnification lens array, the stray light still cannot be sufficiently removed, and there are problems of ghosting or poor image resolution.

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