|Publication number||USRE42450 E1|
|Application number||US 11/267,888|
|Publication date||Jun 14, 2011|
|Priority date||Dec 28, 2001|
|Also published as||US6641272, US20030123164|
|Publication number||11267888, 267888, US RE42450 E1, US RE42450E1, US-E1-RE42450, USRE42450 E1, USRE42450E1|
|Inventors||Chuan-Yu Hsu, Chih-Wen Huang|
|Original Assignee||Transpacific Systems, Llc|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Classifications (18), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention relates to a module of reflection mirrors, especially to a module of reflection mirrors of L-shape in an optical chassis of scanner, wherein a light is reflected in the module of reflection mirrors of L-shape to form a specific constant length of path for facilitating a scanned document to be focused into an image.
A scanner of prior arts as shown in
In order to obtain appropriate optical length within specific volume for above-mentioned optical chassis 5, inside which plural reflection mirrors are arranged for obtaining appropriate optical length to make the reflection light be focused into an image onto a CCD by a lens.
Please refer to
In addition, although there is also a design of multi-reflection by single mirror or parallel mirrors, but it is independent between each mirror, so the fixation for the relative positions and angles between each mirror becomes a main factor to accumulate tolerance.
Accordingly, the inventor addresses an ingenious design of a module of reflection mirrors of L-shape 508 that can effectively improve above-mentioned shortcomings.
The main object of the invention is to provide a module of reflection mirrors of L-shape to combine mirrors and simplify components by applying an L-shaped structure, therefore, to reduce the manufacture cost and the assembling tolerance during manufacture and assembly.
In order to describe the operational principle of the module of reflection mirrors of L-shape proposed by the invention in more clear way, a detail description cooperated with referential drawings is presented as follows.
A module of reflection mirrors of L-shape according to the invention is provided to combine mirrors and simplify components and, therefore, to reduce the manufacture cost and the assembling tolerance during manufacture and assembly.
A scanner according to the invention as shown in
In order to obtain appropriate optical length within specific volume for above-mentioned optical chassis 5, inside which a module of reflection mirrors of L-shape 508 is arranged for obtaining appropriate optical length to make the reflection light be focused into an image onto a CCD by a lens.
Please refer to
The design of optical length of said module of reflection mirrors of L-shape 508 is as follows: a first reflection zone 50811 is located at the upper portion of the first L-shaped mirror, while a second reflection zone 50812 is located at the lower portion thereof; a third reflection zone is located at the lower portion of the second L-shaped mirror, while a fourth reflection zone is located at the upper portion thereof. After entering the module, the incident light is reflected in sequence through the second reflection zone 50812, the third reflection zone 50821, the fourth reflection zone 50822, the second reflection zone 50812, the first reflection zone 50811, the fourth-reflection zone 50822, and the third reflection zone 50821 and leaves the module of reflection mirrors of L-shape 509 to be focused into an image onto the CCD 510 by the second lens 509.
One advantage of above structure is that two pieces of reflection mirror are manufactured integrally and formed into a single L-shaped mirror, such that the relative positions between two reflection mirrors (zones) are very accurate if the precision of manufacture is high enough. For the first L-shaped mirror 5081, a first angle 50813 is formed between the first reflection zone 50811 and the second reflection zone 50812, and if it is separated into two mirrors, each which has to be fixed with a fixation seat, so the accumulated tolerance after two mirrors being assembled is larger than the tolerance of one single integrated structure. Similarly, for the second L-shaped mirror 5082, a second angle 50823 is formed between the third reflection zone 50821 and the fourth reflection zone 50822 and, since it is formed integrally, so the accuracy of the second angle 50823 is more accurate than that of two separated mirrors. In general, the accuracy of a pair of L-shaped mirror (i.e., the first L-shaped mirror 5081 and the second L-shaped mirror 5082) that is fixed respectively by a first fixation seat 50814 and a second fixation seat 50824 is twice of that of the four mirrors that are fixed respectively by four separated fixation seats. On the other hand, this structure may simplify the number of parts, such that the supplies management and manufacture cost during manufacture are benefited.
Accordingly, The design of a module of reflection mirrors of L-shape 508 according to the invention may be modified simply to change its optical length for fulfilling the requirement and performance of different products, and the changing method is described as follows:
As shown in
After being reflected from the document 4, the incident light enters the module with a specific angle and is reflected again in sequence through the second reflection zone 50812, the third reflection zone 50821, the fourth reflection zone 50822, the second reflection zone 50812, the first reflection zone 50811, the fourth reflection 50822, and the third reflection zone 50821, and then leaves the module of reflection mirrors of L-shape with an angle that is different from the entering angle. The optical length for this structure is different from that of aforementioned structure in that an additional round of light reflection is executed between the first L-shaped mirror 5081 and, the second L-shaped mirror 5082. Therefore, in this invention, a simple modification on the first angle 50813 may just increase the optical length simply, and which is a convenient mechanism for design, and at the same time, a simple variation of angle may make the structure fulfilled the requirement of products with different optical lengths.
As for the manufacture of above L-shaped mirrors, if the recession portion is made of metal material, it may be treated with polishing procedure to reach the object of reflection or, on the other hand, if the recession portion is made of materials of plastic or glass, a metal film may then be coated on the mirror for reflecting light.
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|U.S. Classification||359/857, 359/858, 359/856|
|International Classification||G02B5/08, H04N1/03, H04N1/10, H04N1/193|
|Cooperative Classification||H04N1/193, H04N1/03, H04N1/0303, H04N1/0305, H04N1/1017, H04N2201/02493, G02B17/023|
|European Classification||H04N1/03, H04N1/10F2, H04N1/03B3, H04N1/03B2|
|Aug 14, 2009||AS||Assignment|
Owner name: TRANSPACIFIC SYSTEMS, LLC, DELAWARE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TRANSPACIFIC IP LTD.;REEL/FRAME:023107/0267
Effective date: 20090618
|Jun 17, 2013||AS||Assignment|
Owner name: TITUSVILLE CANAVERAL LLC, DELAWARE
Free format text: MERGER;ASSIGNOR:TRANSPACIFIC SYSTEMS, LLC;REEL/FRAME:030628/0681
Effective date: 20130213
|Jun 18, 2013||AS||Assignment|
Owner name: INTELLECTUAL VENTURES I LLC, DELAWARE
Free format text: MERGER;ASSIGNOR:TITUSVILLE CANAVERAL LLC;REEL/FRAME:030639/0330
Effective date: 20130214
|Apr 24, 2015||FPAY||Fee payment|
Year of fee payment: 12