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US 2003/0197911 A1Published application
Optical lens of optical scanner
AssigneeUmax Data Systems Inc.
InventorChih-Wen Huang
Life of this patent
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AssigneeUmax Data Systems Inc.
InventorChih-Wen Huang
Estimating the term…
An optical scanner that may assemble the lens design for varying the focus and resolution, having a light source, a reflection compound mirror, a charge coupled device, a basic objective lens and a compound lens. The basic objective lens is designed by simulation software. According to the lens design theory, the compound lens is designed. By incorporating the basic objective lens and the compound lens, different resolutions such as 1200 dpi, 1600 dpi and 2400 dpi of the optical scanner are obtained without redesigning the lens device, the current specification of the optical scanner is also varied.
An optical compound lens, applied to an optical scanner having at least a light source, a reflection compound mirror and an optical sensor, wherein the light source is used to radiate a document to obtain an image light, the reflection compound mirror is located in an optical path of the image light to project the image light on the optical sensor, and the optical compound lens is located between the optical path of the image light between the optical sensor and the reflection compound mirror, the optical compound lens comprising:
An optical compound lens, applied to an optical scanner having at least a light source, a reflection compound mirror and an optical sensor, wherein the light source is used to radiate a document to obtain an image light, the reflection compound mirror is located in an optical path of the image light to project the image light on the optical sensor, and the optical objective compound lens is located between the optical path of the image light between the optical sensor and the reflection compound mirror, the optical compound lens comprising:
An optical compound lens, applied to an optical scanner having at least a light source, a reflection compound mirror and an optical sensor, wherein the light source is used to radiate a document to obtain an image light, the reflection compound mirror is located in an optical path of the image light to project the image light on the optical sensor, and the optical objective compound lens is located in the optical path of the image light between the optical sensor and the reflection compound mirror, the optical compound lens comprising:
Dependencies are inferred from the claim text.
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Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00: optical design, e.g. procedures, algorithms,…
For controlling the direction of light: scanning systems
Optical elements, systems or apparatus
Term end not estimated
1. Field of the Invention
The invention relates in general to an optical scanner, and more particularly, to an optical scanner that may assemble different lens designs for changing focus and resolution.
2. Description of the Related Art
FIG. 1 shows a conventional optical scanner;
FIGS. 2a to 2b show the conventional objective lens design;
FIGS. 3 shows the basic objective lens design of the invention;
First Embodiment
FIG. 6 shows a first embodiment of an optical scanner according to the invention. This embodiment belongs to a contact assembling type. The optical scanner comprises a light source 100, a reflection compound mirror 400, an optical sensor such as a charge coupled device 100, a basic objective lens 510 and a compound lens (522 in this embodiment). In FIG. 3, the basic objective lens 510 is designed by simulation software according to various resolutions such as 600 dpi, 1200 dpi, 1600 dpi and 2400 dpi. The compound lens is selected from the compound lenses 520 to meet the required resolution, for example, the compound lens 522 can be selected. As shown in FIGS. 4a, 4b, 4c and 4d, the compound lenses 522 and 528 are selected to meet the resolution 1200 dpi, the compound lens 524 is selected to meet the resolution 1600 dpi, and the compound lens 526 is selected for the resolution 2400 dpi. After assembling the basic objective lens 510 and the compound lens, an objective compound lens that meets the resolution requirement is obtained, as shown in FIGS. 5a (1200 dpi), 5b (1600 dpi), 5c (2400 dpi) and 5d (1200 dpi). In FIG. 3, the compound lens is detachable from the basic objective lens. Via the screw thread (linkage apparatus) inside or outside of the basic objective lens, the compound lens can be connected with the basic object lens. It is appreciated that the skilled person may apply other mechanisms to connect these two lenses. With different resolution requirements, compound lenses with different resolutions can be changed without redesigning the whole objective compound lens. In addition, the additionally applied compound lens is located at the optical path of the image light 100 between the basic objective lens 510 and the reflection compound mirror 400. The basic objective lens 510 can also be used independently to result in a basic resolution (600 dpi) of the image light 110 projected to the optical sensor 600.
Second Embodiment