Multiple reflection optical system for scanners

Details Multiple reflection optical system for scanners Multiple reflection optical system for scanners

2000-12-15

2002-09-24

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

C359S223100, C358S474000, C358S494000, C358S496000, C358S497000

Reexamination Certificate

active

06456412

ABSTRACT:

BACKGROUND OF THE INVENTION
(1) Field of the Invention
This invention relates to scanners, in particular to multiple reflection optical system of the scanners.
(2) Brief Description of Related Art
An optical system of prior art is shown in FIG.
1
. The scanner has a scan window
10
, over which a document
12
to be scanned is placed. A light source L scans the document
12
and a light ray containing the image information of the document is reflected. In the multiple reflected path optical system, the reflected light ray undergoes multiple reflections in sequence: reflected by a mirror
161
at point A, reflected by a mirror
162
at point C, reflected by a mirror
165
, reflected by a mirror
164
, reflected again by the mirror
161
at point B, reflected again by the mirror
162
at point D, reflected finally by the mirror
165
before reaching the image sensor
18
through the focusing lens
14
. In this optical system, the focusing lens
14
is enclosed by all the reflecting mirrors. The reflecting mirrors
161
and
162
must be separated vertically from the reflecting mirrors
163
and
164
by a certain distance to allow the placement of the focusing lens
14
. This vertical distance determines the vertical dimension of the scanner frame.
SUMMARY OF THE INVENTION
An object of this invention is to reduce the vertical dimension of a scanner. Another object is to reduce the cost of a scanner.
These objects are achieved by placing the focusing lens outside the area surrounded by the reflecting mirrors, so that no vertical space between the reflecting mirrors need be allowed for the focusing lens.


REFERENCES:
patent: 5907411 (1999-05-01), Han
patent: 6144475 (2000-11-01), Sheng
patent: 6172784 (2001-01-01), Konda

Affiliated with

Also associated with

Rating

Multiple reflection optical system for scanners does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple reflection optical system for scanners, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple reflection optical system for scanners will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2846272