JPH07177303A - Contact image sensor and its production - Google Patents

Abstract

PURPOSE:To provide a contact image sensor capable of preventing the generation of ripples in the quantity of light and reading out also a color image and allowed to be reduced at its size and thickness. CONSTITUTION:A glass fiber light source 14 is constituted of a longitudinal glass fiber square bar 19 whose one face is a light emitting face and dark boxes 20 fixed to both the ends of the square bar 19. Each dark box 20 includes two light emitting diodes(LEDs) 21 arranged in parallel. The square bar 19 has a transparent bar part 19a and a slit part 19b having a rugged part partially worked along the longitudinal direction of the light emitting face. The slit part 19b is formed so that the slit width W2 of the center part is larger than the slit width W1, W3 of both end parts and the slit width is gradually reduced from the center part to both the end parts. The surface of the bar part 19a is coated with a silber material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact image sensor, and more particularly to a contact image sensor used in a facsimile or a scanner for reading image information and converting it into an electric signal.

[0002]

2. Description of the Related Art Conventionally, there have been CCD type image sensors and contact image sensors as reading methods for reading images such as characters and figures in facsimiles or scanners, and CCD type image sensors have been the mainstream. However, the CCD type image sensor has a limit in reducing the size of the entire reading device.

On the other hand, the contact image sensor uses a rod lens array without using a reduction optical system like a CCD type image sensor. Therefore, there is an advantage that the size of the reading device in the thickness direction can be reduced. Therefore, the read method of the contact image sensor is rapidly increasing with the demand for miniaturization of the read device.

FIG. 12 is a cross-sectional view of a conventional image sensor manufactured by, for example, Mitsubishi Electric Corporation. In the figure, 1 is an integral type frame, and 2 is an integral type frame 1. The sensor substrates 3 are focusing lenses fixed to the opening side of the integral frame 1, and a rod lens array is used in this conventional example. Reference numeral 4 denotes a light source disposed on the opening side of the integrated frame 1 similarly to the rod lens array 3, and an LED (light emitting diode) is used in this conventional example.

Reference numeral 5 is a glass plate attached to the open end of the integral frame 1, 6 is a platen, and 7 is a document which is sandwiched between the platen 6 and the glass plate 5 to move. Reference numeral 8 is a sensor provided on the sensor substrate 2, and 9 is a connector incorporated in the integral frame 1 for inputting and outputting an external signal.

Next, the operation will be described. As shown in FIG. 12, the light from the light source 4 incorporated in the frame 1 is projected onto the original 7 conveyed by the platen 6 on the glass plate 5,
A sensor 8 reads the reflected light of the character or image information of the reflected original 7. For example, in the case of the black (character) portion of the document 7, the sensor 8 receives a small amount of light from the light source 4, so that the output is low (for example, 0 V). In the case of the white (no character) portion of the document 7, the sensor 8 has a large amount of light received from the light source 4, and thus has a high output (for example, 3 V). Here, the rod lens array 3 functions as a kind of focusing lens for efficiently transmitting the light from the light source 4 to the sensor 8. A plurality of sensors 8 are usually mounted on the sensor substrate 2 and arranged in a line. The sensor 8 is equipped with a sensor, that is, a shift register for sending out photoelectrically converted electric signals in order in addition to the photoelectric conversion function, and an analog switch. These electric signals are transmitted to the outside through the connector 9 as black and white information output.

By the way, in this case, the light source 4 has a plurality of LEDs arranged in a line as shown in the block diagram of the contact image sensor shown in FIG. There is. FIG. 14 is a plan view of the light source 4, which is always arranged at a constant interval (pitch) P. In addition, the light source 4 is a monochromatic light source that normally uses a yellow-green color having a wavelength of 570 nm. With this wavelength, there is no problem in the case of monochrome characters, but when reading a color image, read green or the like. I can't. When reading a color image, since three color light sources are required, for example, single light sources of red, green, and blue are arranged in block units to form three color light sources. , An image is read by passing an electric current.

Further, each sensor 8 has a light receiving portion of a group of 64 bits and is arranged in a line corresponding to each LED. That is, when the light source 4 is a contact image sensor for A4 size documents and the light source 4 is composed of 27 LEDs, it has a 1728-bit light receiving portion, and each light receiving portion outputs the light received by the LED. It is possible to know the light intensity distribution of. Since the light source 4 in the conventional contact image sensor is formed in block units as described above, the light amount distribution of the entire reading width is 27 as shown in FIG.
Basically, a large ripple is maintained for the LEDs arranged in a row.

FIG. 16 is a timing chart of the black and white signal output of the conventional contact image sensor. When the SI (start signal) signal is received and the CLOCK signal is synchronized, SIG (black and white signal output) is sequentially output from the sensor 8. It is output according to the read information.

Incidentally, in FIG. 13, the amplifier is a voltage amplifier, which normally amplifies the sensor output 10 to 40 times,
Let G.

[0011]

However, since the conventional contact image sensor is constructed as described above, there is a problem that a color image cannot be read in the case of a monochromatic light source.

Further, there is a problem that the light source cannot be brought close to or in close contact with the document surface due to the ripple.

In order to solve this problem, there is a method of using a single LED over the entire reading width, but it has not been realized because it is large and the practical cost is high. There is also a method of making the pitch (P) of the blocks dense, but they cannot be arranged in a line when reading a color image. Further, the heat consumption of the light source is significantly increased due to the increase in the current consumption, which makes it difficult to put into practical use.

Further, when the distance from the light source to the document surface is increased, the light amount distribution due to the directivity is improved, but the illuminance on the document surface is reduced, and the efficiency as a light source is reduced.

The present invention has been made to solve the above problems, and an object thereof is to prevent the ripple of the light quantity so as to make the light quantity distribution uniform and to read a color image. Another object of the present invention is to provide a contact image sensor that can be made smaller and thinner, and a method for manufacturing the contact image sensor according to the present invention.

[0016]

In order to achieve the above object, the contact image sensor according to claim 1 of the present invention comprises a fiber having a light emitting surface and a light emitting means for emitting light to the fiber. And light source means for irradiating the document surface with light from the light emitting surface of the fiber, focusing lens means for focusing the light from the document surface, and a sensor for receiving the light focused by the focusing lens means. It is characterized by

Further, in the contact image sensor according to claim 2, in the invention according to claim 1, the surface of the fiber is coated with a slit portion provided on a light emitting surface and a light shielding member or a light reflecting member. And a transparent bar portion, and the light from the issuing means is emitted from the slit portion.

Further, the slit portion is characterized in that the slit width is formed so as to increase with distance from the light emitting means.

Further, the surface of the slit portion is made uneven.

Further, in the contact image sensor according to the first aspect, the light emitting means is of a plurality of colors.

Further, in the contact image sensor according to claim 1, the light emitting means is a single light source of a plurality of wavelengths.

Further, in the contact image sensor according to claim 2, the slit portion is provided at a C-cut portion of the fiber, and the side surface of the light source means and the focusing lens means are closely contacted or integrally formed. It is characterized by having done.

Further, in the contact image sensor according to claim 2, the slit portion is provided at a C-cut portion of the fiber, and the upper surface of the light source means and the document supporting base are formed in contact with or integrated with each other. It is characterized by

Further, in the contact image sensor according to the second aspect of the invention, the thickness of the fiber in the longitudinal direction is formed so as to become smaller as the distance from the light emitting means increases.

Further, in the contact image sensor according to a second aspect of the present invention, the coated portion on the side surface of the transparent bar portion is reduced as the distance from the light emitting means increases.

In the method of manufacturing the contact image sensor according to claim 2, the fiber is coated with a light shielding member or a light reflecting member in advance, and the light shielding member or the light reflecting member is simultaneously formed at the time of forming the slit portion. It is characterized by removing.

[0027]

In the contact image sensor according to the present invention having the above-mentioned structure, light is emitted from the light emitting means to the original surface, and the reflected light from the original surface is collected by the focusing lens means and received by the sensor. , Photoelectrically converted to obtain a voltage output.

According to the contact image sensor of the first aspect of the present invention, ripples can be prevented by emitting light from the light emitting means provided at the end of the fiber.

In particular, the width of the slit portion is increased as the distance from the light emitting means is increased, or the thickness of the fiber is decreased as the distance from the light emitting means is decreased, or the coded portion on the side surface of the transparent bar portion is decreased as the distance from the light emitting means is decreased. By doing so, uniformized light is emitted from the light source means, so that there is no block variation in the light amount distribution.

Further, since the surface of the transparent bar portion is coded so that the light is emitted only from the slit portion, the light can be emitted efficiently. Further, the unevenness is provided on the surface of the slit portion, so that light can be emitted more efficiently.

Further, it is possible to emit light of a plurality of colors,
Alternatively, by using a plurality of long single light sources, it is possible to read a color image while maintaining the miniaturization of the device.

Further, since the light source means and the focusing lens means are integrated, the contact image sensor can be made compact and thin.

Further, after the fiber is coated with the light shielding member or the like, the light shielding member or the like is removed at the same time when the slit is formed, so that the boundary portion with the slit portion can be accurately coated.

[0034]

EXAMPLES Example 1. Preferred embodiments of the contact image sensor according to the present invention will be described below with reference to the drawings.

In FIG. 1, 11 is a frame, 12 is a sensor substrate installed and fixed on the bottom surface of the tunnel-like cavity of the frame 11, 13 is a rod lens array fixedly attached to the opening side of the frame 11 and used as a focusing lens, 14 Is a glass fiber light source arranged as a light source means on the opening side of the frame 11.

Here, as shown in FIG. 2, the glass fiber light source 14 includes a rectangular glass fiber bar 19 having one surface as a light emitting surface and dark boxes 20 attached to both ends thereof.
It consists of The square member 19 has a transparent bar portion 19a that totally reflects the light from the light emitting means, and a slit portion 19b that is provided by partially processing the light emitting surface along the longitudinal direction and emits the light to the outside. In this embodiment, two LEDs (light emitting diodes) 21 as light emitting means are arranged in parallel in each dark box 20.

In order to allow the glass fiber light source 14 to be brought into close contact with a glass plate on which an original or the like is placed, or an original support table required to support or convey the original, in this embodiment, the original of the frame 11 as shown in FIG. A hook-shaped groove 11a is provided in a part of the support base, and the dark box 20 portion of the glass fiber light source 14 is tightly fixed so as to be sandwiched between the groove 11a and the light source base 11b arranged under each dark box 20 in the frame 11. To do. Therefore, the upper surface of the glass fiber square bar 19 is installed in an open state.

Further, the contact image sensor 10 according to the present embodiment has the sensor 18 arranged on the sensor substrate 12.
And a document guide 15 which guides the document 7 conveyed by the platen 6 and is arranged near the surface of the document 7 which reflects the light from the glass fiber light source 14.

Next, the operation of the contact image sensor 10 in this embodiment will be described.

In FIG. 1, the glass fiber light source 14
The light emitted from is reflected by the document surface, focused by the rod lens array 13, and incident on the sensor 18 of the sensor substrate 12. The light received by the sensor 18 is photoelectrically converted into a black-and-white signal output, and the black-and-white signal is processed by a method similar to the conventional method. FIG. 3 shows a light amount distribution of each part of the glass fiber light source 14. As shown in FIG. 2, since the glass fiber light source 14 is equipped with the LEDs 21 at both ends, there is no block variation, but the amount of light decreases from the both ends toward the central portion. The curve A in FIG.
When 1 is attached to both ends, curve B is the case where two are attached.

As described above, since the LED 21 is attached to both ends of the glass fiber light source 14, ripple can be prevented. The magnitude of the output value of the total amount of light can be changed by the slit width.

Further, in this embodiment, the slit portion 1 is separated from the light emitting means, that is, the LED 21.
It is characterized in that the width of 9b is formed large. In this embodiment, since the glass fiber light source 14 is provided with the LEDs 21 at both ends thereof, as shown in FIG. 4, the slit width W2 at the central portion is the slit width W at both ends.
1 and W3, and the slit width is gradually reduced from the central portion toward both ends.
A curve C in FIG. 3 is a case where one LED 21 is attached to both ends of the glass fiber light source 14 shown in FIG. 4, and a curve D is a case where two LEDs 21 are attached. In this way, by increasing the slit width W2 in the central portion, the light emitting area in that region becomes larger than in both end portions, so that the light amount distribution becomes flat.

FIG. 5 is a side view of an essential part of the slit portion 19b shown in FIG. 4, and FIG. 6 is a plan view of the slit portion 19b. Here, the slit portion 19b is formed by grinding a part of the light emitting surface, which is a surface facing the original 7, of the glass fiber square bar 19 having a thickness of l, and grinding the entire slit portion or a main portion thereof. It is formed by providing unevenness. In this, the surface of about 1 μm to 5 μm can be made uneven by selectively treating the square members 19 with hydrofluoric acid. As shown in FIG. 5, the position of the LED 21,
By appropriately adjusting the depth t of the slit of the slit portion 19b and the emission angles α and β of the light from the LED 21 to each uneven surface with respect to the horizontal direction, scattered light can be emitted from the square bar 19 to the outside. Further, the slit widths W1 to W3 with respect to the width W0 of the square bar 19 are a computer in view of the position and the directivity of the LED 21 serving as a light source so that a uniform light amount is emitted. Then
1 mm × 7 mm) and the surface roughness.
The amount of light is determined by the dimensions shown in FIGS. 5 and 6 with one LED 21 as the center of the optical axis. The portion of the transparent bar portion 19a other than the slit portion 19b is originally totally reflected and emits less light, but since there is unnecessary radiation, the surface is coated with a light shielding member or a light reflecting member. In this embodiment, the silver material is coated on the portions other than the slit portion 19b. To be precise, these steps are for the timber 19
The most accurate method is to pre-coat the entire surface excluding both end surfaces with a silver material and remove the silver material at the same time when the slit portion 19b is formed. This is because if the slit portion 19b is first provided and then the portions other than the slit portion 19b are coded, the presence or absence of coding at the boundary with the slit portion 19b becomes a problem.

In this way, the silver material is used for the slit portion 19b.
Other than coating. In the range of several mm from both ends of the square member 19, the light emitted from the LED 21 having no directivity is directly emitted from the slit portion 19b, so that the light amount becomes large. Therefore, it is best to arrange the LED 21 deep inside the dark box 20 so that the light from the LED 21 is not directly emitted from the slit portion 19b and to make the direct light emission zero, but not necessary when the effective reading width is small. Is.

The structure of the irregularities of the slit portion 19b and the manufacturing method thereof are also effective in the embodiments described later.

As described above, the glass fiber light source 14
By mounting the LEDs 21 on both ends of the slit and configuring the slit portion 19b as described above, it is possible to prevent ripples and make the light amount distribution uniform.

Example 2. FIG. 7 is a schematic view showing another embodiment of the glass fiber light source 14. A characteristic of the second embodiment is that, as shown in FIG. 8, LEDs as light emitting means are provided with three light sources of a plurality of colors to enable color reading. Ie red, blue,
By fitting the three light source units 121 having green LEDs into the three light source unit connecting portions 20a of the dark box 20 provided at both ends of the glass fiber light source 14, and sequentially lighting red, blue, and green to obtain a designated light source. You can

By the way, when reading a color image, normally,
A light source having a wavelength in the entire region such as a white fluorescent lamp and an infrared cut filter are used, but in this embodiment, each color LED is used.
Since an infrared cut filter is not required,
Further, it is not necessary to provide the sensor 18 with a filter for identifying three colors for selecting the wavelength from the white fluorescent lamp.

As described above, color reading can be performed by using the three light source unit 121 having the red, blue and green LEDs.

A white light source may be installed in place of the three light sources to provide a single light source with a plurality of wavelengths. In this case, it is necessary to dispose a three-color identification filter, but the light source for color reading can be downsized, which is more effective than using a conventional fluorescent lamp.

The three-color LED light sources attached to the dark box 20 are installed on the printed circuit board so that three red, green, and blue are centered on blue. This is because blue has the lowest luminous efficiency and is used as the base point of the optical dimension at the time of design. Of course, the present embodiment is not limited to this arrangement. Each terminal is provided, the common is common, and the number of pins is limited to four. During driving, red, green, and blue are sequentially turned on, a color image of one line is read, and signal output for each color is sequentially transmitted to obtain color image data. In this case, although the red, green, and blue light emission efficiencies are different from each other, the output signal for each color is processed by the signal processing circuit later. fundamentally,
Since the adjacent light quantity distribution at each reading position is close to zero, there is no problem of chromatic aberration.

Further, in the present embodiment, the slit width is continuously changed at the central portion and both end portions of the slit portion 19b. However, when the slit width is the same, the light amount gradually decreases at the central portion. Although it is possible to correct by adding a shading correction circuit after reading the signal output, this is not the gist of the present invention.

Example 3. In FIG. 9, a part of a glass fiber square member 119 constituting the glass fiber light source 14 is C-cut, and a slit portion 119b is provided in the cut portion. The flat portion 120 provided on the upper surface of the square member 119 is designed to be in close contact with the document support table. Of course, they may be adhered and integrated.

Therefore, unlike the first embodiment, the square bar 119 can be fixed to the frame without providing the hook-shaped groove 11a in the frame 11.

Further, in FIG. 9, the side surface of the square bar 119 is arranged so as to be in close contact with the rod lens array 113. Alternatively, they may be bonded and integrated. As a result, the contact image sensor in this embodiment can be further downsized and thinned.

Example 4. In the above embodiment, the LED
Although the emitted light is made uniform by increasing the width of the slit portion as the distance from the LED increases, in the present embodiment, the thickness of the rectangular member becomes thinner as the distance from the LED increases without changing the width of the slit portion. It is characterized in that the emission light is made uniform by being formed. If LEDs are provided at both ends of the glass fiber light source as in the above-described embodiment, as shown in FIG. 10, the square bar 219 of the glass fiber light source has a thickness L2 at both ends as it approaches the central portion. It is formed thinner than the thicknesses L1 and L3 of the parts. Decreasing the thickness of the central part means that the radiation angle for receiving light from the light source will be smaller,
The light emitted from the slit portion 219b, that is, the amount of scattering increases.

As a result, the amount of light emitted from the glass fiber square bar 219 can be increased toward the central portion of the square bar 219. Therefore, as shown in the first embodiment,
As in the case where the slit width is increased toward the central portion, the light amount distribution can be made uniform.

Example 5. As described above in the first embodiment, the silver material is coated on the surface other than the slit portion 19b of the square bar 19 in order to prevent unnecessary radiation from the square bar 19, but the characteristic point of this example is as follows.
As shown in FIG. 11, a glass fiber square bar 319
Of the transparent bar portion 31 without changing the width of the slit portion 319b of
LE provided on the end of the glass fiber light source with the pattern of the light-shielding portion (coded portion) 319d of 9a
It is to decrease as it moves away from D (not shown). That is, also in this embodiment, as in the above-described embodiment, if LEDs are provided at both ends of the glass fiber light source, as shown in FIG. 11, scattered light is more likely to be emitted toward the central portion of the surface of the square bar 319. The structure is to reduce it to a very low level.

As a result, the light amount distribution can be made uniform as in the above-described embodiment.

Example 6. In the above-mentioned first to fifth embodiments, the square member is used as the glass fiber, but when the efficiency of the light quantity is not required, the circular or semi-circular glass fiber may be used.

Example 7. Although glass fibers are used as the material of the light source in the first to fifth embodiments, the same effect can be obtained with a plastic material such as acrylic resin if the light quantity efficiency is not critical.

[0062]

As described above, according to the present invention, since the fiber is used as the light source means and the light emitting means is provided at both ends thereof, the ripple can be prevented.

Furthermore, since the width of the central portion of the slit portion is formed so as to increase with distance from the light emitting means, it is possible to make the light quantity distribution of the light emitted from the light source means uniform.

Further, by coding the mirror surface of the transparent bar portion, it becomes possible to prevent unnecessary light emission and to emit light only from the slit portion. In particular, by forming unevenness on the surface of the slit portion, it becomes possible to more efficiently emit scattered light.

Further, without changing the width of the slit portion, by making the thickness of the fiber or the coding portion of the transparent bar portion thinner or less as the distance from the light emitting means increases, the light quantity distribution can be made uniform. It is possible to plan.

Further, since the light emitting means is provided at both ends of the fiber so as to have a plurality of colors, a color image can be read. Further, by using a single light source having a plurality of wavelengths, it is possible to miniaturize the light emitting means for reading a color image.

Further, since the slit portion is provided in the C-cut portion of the light source means and the upper surface thereof is formed so as to be in close contact with the document support table, the light source means can be easily fixed to the frame.

Further, by integrally forming the light source means and the focusing lens means, it is possible to further reduce the size and thickness.

Further, when the slit portion is formed in the fiber according to the present invention, the light shielding member or the light reflecting member is preliminarily coated on the surface of the transparent bar portion and then removed, so that it can be formed accurately. It will be possible.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing first and second embodiments of a contact imager according to the present invention.

FIG. 2 is a diagram showing a glass fiber light source in the first embodiment.

FIG. 3 is a diagram showing a light quantity distribution of a glass fiber light source in the present embodiment.

FIG. 4 is a diagram showing another glass fiber light source in the first embodiment.

FIG. 5 is a side view of a main portion of a slit portion of the contact imager according to the present invention.

FIG. 6 is a plan view of a main part of a slit portion of the contact imager according to the present invention.

FIG. 7 is a diagram showing a glass fiber light source in a second embodiment of the contact imager according to the present invention.

FIG. 8 is a diagram showing a light source in a second embodiment.

FIG. 9 is a diagram showing a glass fiber light source and a rod lens array in a third embodiment of the contact imager according to the present invention.

FIG. 10 is a view showing a square member of glass fiber in a fourth embodiment of the close contact imager according to the present invention.

FIG. 11 is a view showing a square member of glass fiber in a fifth embodiment of the close contact imager according to the present invention.

FIG. 12 is a cross-sectional view of a conventional contact image sensor.

FIG. 13 is a block diagram of a conventional contact image sensor.

FIG. 14 is a plan view of a conventional light source.

FIG. 15 is a diagram showing a light amount distribution of a conventional light source.

FIG. 16 is a diagram showing an operation timing of a conventional contact image sensor.

[Explanation of symbols]

 11 frame 11a groove 12 sensor substrate 13, 113 rod lens array 14 glass fiber light source 18 sensor 19, 119, 219, 319 square bar 19a, 319a transparent bar section 19b, 119b, 219b, 319b slit section 20 dark box 20a 3 light source unit connection section 121 3 Light source unit l Thickness of glass square bar t Depth of slit W1, W2, W3, Wn Slit width W0 Square bar width of glass fiber

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[Procedure amendment]

[Submission date] April 12, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 7

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 8

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

Further, in the contact image sensor according to claim 2, wherein the slit portion is set vignetting C- cut portion of said fibers, adhesion or integral forming a side surface and said focusing lens means of the light source means It is characterized by having done.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Further, in the contact image sensor according to claim 2, wherein the slit portion, the setting in the C- cut portion of the fiber vignetting, close contact or integrated form an upper surface and a document support table of the light source means It is characterized by

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

Further, it is possible to emit light of a plurality of colors,
Alternatively, by using a single light source of a plurality of wavelengths , it is possible to read a color image while maintaining the miniaturization of the device.

Claims (11)

[Claims] 1. A light source means including a fiber having a light emitting surface and a light emitting means for emitting light to the fiber, and a light source means for irradiating light from the light emitting surface of the fiber onto a document surface; A contact image sensor comprising: a lens unit; and a sensor that receives the light focused by the focusing lens unit. 2. The fiber has a slit portion provided on a light emitting surface and a transparent bar portion whose surface is coated with a light shielding member or a light reflecting member, and the light from the light emitting means is slit by the slit. The contact image sensor according to claim 1, wherein the contact image sensor is discharged from a portion. 3. The contact image sensor according to claim 2, wherein the slit portion is formed such that a width of the slit increases as the distance from the light emitting means increases. 4. The contact image sensor according to claim 2, wherein the surface of the slit portion is made uneven. 5. The contact image sensor according to claim 1, wherein the light emitting means has a plurality of colors. 6. The contact image sensor according to claim 1, wherein the light emitting means is a single light source having a plurality of wavelengths. 7. The slit portion is C of the fiber.
The contact image sensor according to claim 2, wherein a cut portion is provided, and the side surface of the light source means and the focusing lens means are formed so as to be in close contact with or integrated with each other. 8. The slit portion is C of the fiber.
The contact image sensor according to claim 2, wherein a cut portion is provided, and the upper surface of the light source means and the document support base are formed in close contact with or integrated with each other. 9. The contact image sensor according to claim 2, wherein the thickness of the fiber in the longitudinal direction is formed so as to be farther from the light emitting means. 10. The contact image sensor according to claim 2, wherein the coated portion on the side surface of the transparent bar portion is reduced with distance from the light emitting means. 11. The method for manufacturing a contact image sensor according to claim 2, wherein the fiber is coated with a light shielding member or a light reflecting member in advance, and the light shielding member or the light reflecting member is simultaneously formed at the time of forming the slit portion. A method for manufacturing a contact image sensor, which comprises removing the contact image sensor.