Unlock instant, AI-driven research and patent intelligence for your innovation.

Concave mirror optical system for scanner

Inactive Publication Date: 2010-09-07
INTELLECTUAL VENTURES I LLC
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]A second object of this invention is to provide a concave mirror in the optical system of a scanner such that chromatic dispersion by the lens assembly of a conventional scanner is eliminated. In addition, simple material is used to form the concave mirror so that production cost is greatly reduced. Moreover, different magnifications can be obtained due to a difference in focusing power of the concave mirror along XY axis direction.

Problems solved by technology

Hence, the optical system is structurally complicated and difficult to assembly, thereby increasing the production cost.
Moreover, the lens assembly 138 may produce chromatic dispersion that may affect the image quality.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Concave mirror optical system for scanner
  • Concave mirror optical system for scanner
  • Concave mirror optical system for scanner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023]Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

[0024]FIG. 3A is the top view and the side view of a first concave mirror to be used in the optical system of this invention. As shown in FIG. 3A, the first concave mirror 170 has a cylindrical or straight barrel-shaped surface. The list concave mirror 170 has a first long edge 171, a second long edge 172, a first short edge 173, a second short edge 174, a first surface 175 and a second surface 176. The first short edge 173 and the second short edge 174 curve to form the concave first surface 175 and the convex second surface 176.

[0025]FIG. 3B is the top view and the side view of a second concave mirror to be used in the optical system of this invention. As shown in FIG. 3B, the second concave mirror...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A concave mirror optical system for a scanner and a method for compensating image distortion. In this invention, the more expensive lens assembly in a conventional optical system is replaced by a concave mirror made from simple low-cost material so that production cost and chromatic dispersion are reduced. Moreover, different magnifications can be obtained due to a difference in focusing power of the concave mirror along XY axis direction.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of Invention[0002]The present invention relates to an optical system for a scanner. More particularly, the present invention relates to a concave mirror optical system for a scanner.[0003]2. Description of Related Art[0004]Rapid progress in multi-media technologies has lead to great advances in image-processing devices. In a few years time, the black-and-white palm-top scanners has developed into full-color high-resolution scanner system that can display fine detail with added realism.[0005]In general, scanning systems can be roughly divided into the reflective type and the transparent type. In the reflective scanning system, a document (made of non-transparent material) is placed on a transparent glass panel. Light transmitting through the transparent glass panel impinges upon the document. The light is reflected by the document into an optical system before delivering to an optical sensor such as a charge couple device (CCD) or a contact i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G02B26/08G02B26/10G02B26/12G02B27/00
CPCG02B26/10G02B27/0031
Inventor KUO, SHIH-ZHENG
Owner INTELLECTUAL VENTURES I LLC