JP3080372U - Optical path structure of double-sided document scanner - Google Patents

Abstract

(57) [Problem] To provide an optical path structure which employs a single lens and a single photosensitive means, has a simple structure, and can scan both sides of a document at one time. SOLUTION: The light source includes a first light source, a second light source, a first reflection mirror set, a second reflection mirror set, a lens, and a photosensitive unit, wherein the first light source and the second light source are respectively disposed above and below, and A document transport path is formed between the first light source and the second light source, and the first reflecting mirror set includes a plurality of mirrors, and reflects light reflected from the front of the document in an appropriate direction. Also, the second reflecting mirror set has a plurality of mirrors so that the reflected light on the back side of the document can be reflected in an appropriate direction, and the lens is reflected by the first reflecting mirror set and the second reflecting mirror set. The light rays generated by the first light source and the second light source can be radiated to the front and back of the document, respectively, and the reflected light from the front and back of the document can be respectively reflected by the first reflected light. The light can be condensed by being incident on the lens via the lens set and the second reflecting mirror set, and the light can be condensed on the photosensitive means.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an optical path structure of a double-sided document scanner, and particularly employs a single lens and a single photosensitive unit, and has a simple optical path structure capable of scanning both sides of a document at a time. It is concerned.

[0002]

[Prior art]

 Scanners are already one of the basic facilities owned by many computer users, and all documents and graphics can be placed in the scanner and faithfully projected by the computer. In fact, the principle of the scanner is fairly simple. In other words, an image of this part can be obtained by irradiating a part of the document with the light beam and reading the light beam reflected from the part. Alternatively, preferably scanned images can be read into image processing software to perform the correction. If the scanned document is a printed product, the printed seal can be converted to a character file by “font identification software” and stored in a computer.

FIG. 1 is a diagram showing a conventional scanner, which scans a document 11a by a light source 10a provided inside a scanner main body (not shown), and the light source 10a irradiates and scans the document 11a, and then reflects the document 11a. The light enters the lens 13a via the reflection of the mirror 12a and is focused, and the light beam is focused on a photosensitive means (for example, a charge coupling device CCD) 14a. Convert to analog or digital signals that can be received.

However, the conventional scanner cannot simply scan a single side of the document 11a, and if the document 11a is to be scanned on both sides, it must perform two scans, which is inconvenient for use. May be invited. When the light source, mirror, lens, and photosensitive means are arranged in two sets, the double side of the document can be scanned at one time, but the arrangement of two sets of lenses and photosensitive means complicates the structure. Not only does this increase costs, but can also reduce competitiveness in the market.

Therefore, the above-mentioned conventional scanner has obvious inconvenience and disadvantages in practical use and needs to be improved.

[0006]

[Problems to be solved by the invention]

 The present invention can scan the double side of a document at one time, is useful for scanning a user's double sided document, and does not require only one set of lens and photosensitive means, is simple in structure and greatly reduces cost. Its main purpose is to provide a light path structure for a double-sided document scanner that can improve the competitiveness in the market.

[0007]

[Means for Solving the Problems]

 To achieve the above object, the present invention includes a first light source, a second light source, a first reflecting mirror set, a second reflecting mirror set, a lens, and a photosensitive unit, and the first light source and the second light source. Are arranged above and below, respectively, and form a document transport path between the first light source and the second light source. The first reflecting mirror set includes a plurality of mirrors, and reflects from the front of the document. The second set of reflecting mirrors also has a plurality of mirrors so that the reflected light on the back of the document can be reflected in an appropriate direction, and the lens can be reflected in the first direction. The light rays reflected from the reflection mirror set and the second reflection mirror set can be collected, the light rays generated by the first light source and the second light source can be radiated to the front and back of the document, respectively, and the front and back of the document can be collected. A double-sided document scanner characterized in that reflected light is incident on a lens via a first reflecting mirror set and a second reflecting mirror set to collect light, and light rays can be focused on photosensitive means. Its main purpose is to provide an optical path structure.

[0008]

2 to 6 show an embodiment of an optical path structure of the double-sided document scanner of the present invention, which is particularly applied to a business card scanner. It has a first light source 10, a first reflection mirror set 20, a second light source 30, a second reflection mirror set 40, a lens 50, and a photosensitive means 60, of which a first light source 10 and a second light source 30 are provided. Are disposed above and below, respectively, are appropriately fixed inside a scanner body (not shown), and a first glass 70 and a second glass 80 are provided between the first light source 10 and the second light source 30. The first glass 70 and the second glass 80 are arranged so as to be parallel to each other, have a gap between the two glasses 70 and 80, form a document transport path 90, and form a document (document). 100 is driven by a suitable transport mechanism (not shown) to pass through a document transport path 90 between the two glasses 70 and 80, and the first light source 10 and the second light source 30 generate a required light beam. And irradiates the front and back of the document 100.

The first reflecting mirror set 20 is appropriately arranged inside a scanner main body (not shown), and can reflect light rays reflected from the front of the document 100 in an appropriate direction. The first mirror 21 is located above the first glass 70, the first mirror 21 is arranged in an inclined manner, and the second mirror 22 is disposed on the first glass 70. The mirror 22 is also arranged in an inclined manner, and the second mirror 22 and the first mirror 21 are located at the same height, the third mirror 23 is located below the side where the second mirror 22 is located, The third mirror 23 is also arranged obliquely, the third mirror 23 is located at the same height as the document transport path 90, and the lengths of the first mirror 21, the second mirror 22, and the third mirror 23 are set. Is It is shortened sequentially.

The second reflecting mirror set 40 is suitably disposed inside a scanner main body (not shown), and can reflect light reflected from the back of the document 100 in an appropriate direction. The fourth mirror 41 is located below the second glass 80, and the fourth mirror 41 is arranged in an inclined manner, and the fifth mirror 42 is also inclined. The fifth mirror 42 and the fourth mirror 41 are located at the same height. The sixth mirror 43 is arranged above the side where the fifth mirror 42 is located, and the sixth mirror 43 is also arranged in an inclined manner, and the sixth mirror 43 and the document transport path 90 are located at the same height, The lengths of the fourth mirror 41, the fifth mirror 42 and the sixth mirror 43 are sequentially reduced.

The lens 50 and the photosensitive means 60 are appropriately disposed inside a scanner body (not shown), and the lens 50 and the photosensitive means 60 are connected to the third mirror 23, the sixth mirror 43, the document transport path 90, Are positioned at the same height, the lens 50 can collect the reflected light of the first reflection mirror set 20 and the second reflection mirror set 40, and can employ a CCD charge coupling element as the photosensitive means 60, Can be converted into an analog signal or a digital signal that can be received, and the above-described configuration forms the optical path structure of the double-sided document scanner of the present invention.

Light rays generated by the first light source 10 and the second light source 30 can irradiate the front and back of the document 100 via the first glass 70 and the second glass 80, respectively, and the reflected light of the front of the document 100 can be obtained. Is focused on the side of the lens 50 through the reflection of the first mirror 21, the second mirror 22, and the third mirror 23 of the first reflecting mirror set 20, and the light beam is focused on the side of the photosensitive unit 60. By these operations, the light signal is converted into an analog or digital signal which can be received by the photosensitive means 60, and the reflected light on the back of the document 100 is reflected by the fourth mirror 41 and the fifth mirror 41 of the second reflecting mirror set 40. An analog or digital device that reflects and enters the other side of the lens 50 via the mirror 42 and the sixth mirror 43 and can receive an optical signal by the photosensitive unit 60 The purpose of this process is to convert both sides of the document at the same time by converting them into signals.

The present invention can scan the double side of the document at one time, and the present invention requires only one set of lens and photosensitive means, so the structure is simple and the cost can be greatly reduced. Greatly improve market competitiveness.

[0014]

[Effect of the invention]

 As described above, the present invention can perform only one-sided scanning of the conventional scanner, and when scanning the front and back of the document at the same time, the user must perform two scans, which is a problem for the user. Problems such as inconvenience of use can be solved.

[Brief description of the drawings]

FIG. 1 is a side view showing the structure of a conventional scanner.

FIG. 2 is a perspective view showing the structure of the present invention.

FIG. 3 is a side view showing the structure of the present invention.

FIG. 4 is a plan view illustrating a first light source, a first reflecting mirror set, a lens, and a photosensitive unit according to the present invention;

FIG. 5 is a plan view illustrating a second light source, a second reflecting mirror set, a lens, and a photosensitive unit according to the present invention;

FIG. 6 is a diagram showing an optical path of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st light source 20 1st reflection mirror set 21 1st mirror 22 2nd mirror 23 3rd mirror 30 2nd light source 40 2nd reflection mirror set 41 4th mirror 42 5th mirror 43 6th mirror 50 lens 60 photosensitive means 70 First glass 80 Second glass 90 Document transportation route 100 Document

Claims (6)

[Utility model registration claims] 1. A light source, comprising: two light sources respectively provided above and below to form a document transport path between the two; light beams generated by the light sources are respectively illuminated on the front and back of the document; and a plurality of mirrors. A first reflecting mirror set capable of reflecting light reflected from the front of the document, a second reflecting mirror set including a plurality of mirrors and capable of reflecting light reflected from the other side of the document, photosensitive means, and the first reflecting mirror An optical path structure for a double-sided document scanner, comprising: a set and a lens for condensing light reflected by the second reflecting mirror set and for focusing light rays on the photosensitive means. 2. A first glass and a second glass between the two light sources.
The glass according to claim 1, wherein a glass is provided, the first glass and the second glass are arranged in parallel, and a gap is formed between the two glasses as a document transport path. Light path structure of double sided document scanner. 3. The first reflecting mirror set includes a first mirror, a second mirror, and a third mirror, wherein the first mirror is located above the first glass, and the first mirror is inclined. The second mirror is also arranged at an angle, and the second mirror and the first mirror are located at the same height, and the third mirror is located below the side where the second mirror is located. The light path structure of the double-sided document scanner according to claim 1, wherein the third mirror is disposed at an inclination, and the third mirror is positioned at the same height as the document transport path. 4. The light of claim 3, wherein the first mirror, the second mirror, and the third mirror are formed such that their lengths are sequentially reduced. Path structure. 5. The second reflecting mirror set includes a fourth mirror, a fifth mirror, and a sixth mirror, wherein the fourth mirror is located below the second glass, and the fourth mirror is tilted. And the fifth mirror is also arranged at an angle, and the fifth mirror and the fourth mirror are located at the same height, and the sixth mirror is located above the side where the fifth mirror is located. The double-sided document scanner light according to claim 1, wherein the sixth mirror is also disposed at an angle, and the sixth mirror is positioned at the same height as the document transport path. Path structure. 6. The light of claim 5, wherein the fourth mirror, the fifth mirror, and the sixth mirror are formed such that their lengths are sequentially reduced. Path structure.