JP2925176B2 - Image input device - Google Patents

Description

The present invention relates to an image input device for inputting an image formed on a film applied to, for example, an image scanner or a copying machine.

(Prior Art) In recent years, a color copying machine using a thermal transfer type ink ribbon has been developed and put to practical use using digital technology. In such a copying machine, in addition to reading and forming an image of a document placed on a platen, for example, a film image is projected by a projector onto a screen provided on the platen, and this screen is scanned by a scanner. A device equipped with an image input device for inputting an image by scanning has been developed.

Such an image input device illuminates a film loaded in a projector with a light source, guides light transmitted through the film to a screen unit using a projection lens, and changes an optical path by a mirror provided in the screen unit. Then, the image is projected onto a screen placed on a document table, and the projected image is scanned as if reading a document placed on the document table, and image input is performed.

However, for example, when the image is laterally displaced or tilted due to the positional deviation of the optical system of the image input device, in the case of normal document reading, the document is brought into contact with the document and the position of the document scale is adjusted to adjust the lateral displacement. Although the screen unit is fixed to a predetermined part of the image input device, the image projected on the screen unit is read with a lateral shift or a tilt. was there.

(Problems to be Solved by the Invention) As described above, according to the present invention, when a lateral displacement or an inclination of an image occurs due to a displacement of an optical system of an image input device, the screen unit is fixed to a predetermined portion of the image input device. The purpose of this is to remove the drawback that the image projected on the screen unit is read with lateral displacement or tilt occurring, and to eliminate the lateral displacement of the image due to the positional displacement of the optical system. It is an object of the present invention to provide an image input device capable of inputting an image having no lateral displacement or inclination even when inclination occurs.

[Configuration of the Invention] (Means for Solving the Problems) The image input apparatus of the present invention inputs image information by optically scanning an original on an original platen, guiding the original to a photoelectric conversion unit by an optical system, and performing photoelectric conversion. A document table on which a document is placed, a positioning reference member for adjusting the position of the document table placed on the document table, holding means for adjustingably holding the position of the positioning reference member with respect to the optical system, A film image projection device for projecting an image of a film document, a portion for attaching a part of the film image projection device, a mounting member provided integrally with the positioning reference member, a document placed on the platen Means for scanning the image of the film image and the image projected by the film image projecting device and guiding it as a light image, and photoelectric conversion means for photoelectrically converting the light image guided by the optical means It consists, in which positional adjustment operation for the film image projecting device with the adjustment operation of the positioning reference member with respect to the document is made.

(Function) The present invention relates to an apparatus for optically scanning an original on a platen and inputting image information by photoelectrically converting the original to a photoelectric conversion unit by an optical system. The position of the positioning reference member with respect to the optical system is adjusted and held by holding means so that the image of the film original is projected by a film image projection device, and the positioning reference member is provided integrally with the positioning reference member. An attachment member is provided with a part of the film image projection device attached thereto, and guides the image of the document placed on the document table and the image projected by the film image projection device as an optical image by optical means for scanning. The optical image is photoelectrically converted, and the position adjustment operation for the film image projection device is performed with the adjustment operation of the positioning reference member for the original. Things.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows a thermal transfer type color copying machine to which the image input apparatus of the present invention is applied and which can selectively perform multicolor color copying. That is, reference numeral 1 denotes a copying main body, and an operation panel (not shown) is provided at the front of the upper surface of the main body 1. The upper part of the main body 1 is a platen (transparent glass)
A document scanning unit 3 for scanning and reading a document D set on the document scanning unit 2, and an image forming unit 4 at the lower part. Reference numeral 5 denotes a document cover provided on the document table 2 so as to be freely opened and closed.
The document table 2 is fixed to the main body 1.

FIG. 3 (a) shows an end of the platen 2 in the longitudinal direction.
As shown in (b), a fixed scale 50 is provided as a reference for setting the document D. The fixed scale 50 includes a transparent portion and a white opaque portion. Hands 51 and 52 serving as size indicators face the transparent portion. As shown in FIG. 3 (b), the hands 51, 51 are provided with belts 57 wound between the pulleys 54, 55.
It is fixed to. The pulley 55 is rotated by a motor 58, and the rotation of the motor 58 is driven according to the set paper size and magnification, thereby changing the distance between the hands 51 and 52. It is supposed to be. The range described by the hands 51 and 52 is the vertical width as the copyable range. 156 is
This is a pin for attaching a screen unit 150 described later.

The position of the fixed scale 50 can be adjusted. That is, in addition to the displacement of the scanning optical system such as the displacement of the mirror to be scanned, the displacement and inclination of the lens, and the like, the displacement between the running position of the sheet P and the image forming position when connected to the image forming unit. For this reason, there is a problem that an image cannot be formed at the correct position on the paper P. Therefore, the position of the fixed scale 50 is adjusted, and the adjusted fixed scale is adjusted.
An image can be formed at a correct position by copying the sheet P with the sheet 50. For example, as shown in FIG. 11A, the position where the image G is formed
In the case where the image G is formed in the upper part of the drawing, or as shown in FIG.
As shown in FIG. 3C, the fixed scale 50 is moved by the adjusting mechanism 157 in the direction of the arrow (front side or rear side) in the figure to adjust the image G to the center of the sheet P. For example, as shown in FIGS. 12A and 12B, when the position where the image G is formed is inclined with respect to the sheet P, as shown in FIG. The fixed scale 50 is moved in the direction of the solid line arrow or the dotted line arrow by 157 to adjust the image G and the paper P so as to be parallel. By such adjustment, the image G can be copied to a correct position on the paper P.

A white reference plate 59 is provided on the upper surface of the end of the document table 2 below the fixed scale 50.

The document scanning section 3 is configured, for example, as shown in FIG. That is, a first carriage 7 on which an illumination lamp 6 as a light source is mounted, a second carriage 8 that bends an optical path by a mirror, a lens 9, and a photoelectric converter that reflects light reflected from the document D.
The mirror section 10 guides the light to the optical path 11 and corrects the optical path length at the time of zooming. The photoelectric converter 11 receives the reflected light from the document D, and includes a drive system (not shown) for changing the position of each section. I have.

The first carriage 7 has an illumination lamp 6 for irradiating the original D with light, a reflector 12 as a reflector for collecting the light from the illumination lamp 6 on the original surface, and a second carriage for reflecting the reflected light from the original D. A mirror 13 for guiding to the 8 side is mounted.

The second carriage 8 is provided with mirrors 8a and 8b for guiding the light guided by the mirror 13 to the lens 9. The first and second carriages 7 and 8 are connected to each other by a timing belt (not shown).
The carriage 7 moves in the same direction at half the speed of the carriage 7. Thus, scanning can be performed while keeping the optical path length to the lens 9 constant.

The lens 9 has a fixed focal length, and is moved in the optical axis direction during zooming. The lens 9 may be a lens having a variable focal length, such as a zoom lens.

The mirror section 10 is composed of two mirrors 10a and 10b, and the positions of the mirrors 10a and 10b are changed according to the change in the optical path length corresponding to the selected magnification. By bending the optical path of the light from the lens 9 with the mirrors 10a and 10b, the light is guided to the photoelectric converter 11.

The photoelectric converter 11 separates and outputs the image of the document D as a color signal of cyan, green, and yellow (or red, green, and blue) light by photoelectrically converting the reflected light from the document D. For example, it mainly includes a CCD type line image sensor. In this case, the original D
One pixel of the CCD sensor has three consecutive elements (C, G,
Y, or R, G, B). The above photoelectric converter
The output of 11 is supplied to an A / D converter 91 described later.

The first and second carriages 7, 8, lens 9, mirror 10
a and 10b are stepping motors (not shown)
Is moved by using as a drive source. As shown in FIG. 5, the first and second carriages 7, 8 are operated by a timing belt 19 which is stretched between a drive pulley 14 connected to a rotation shaft of the stepping motor and idle pulleys 15, 16. It is to be moved according to.
The mirrors 10a and 10b and the lens 9 are moved by separate stepping motors (not shown). The spiral shaft (not shown) of the lens 9 is rotated by a corresponding stepping motor,
The movement of the spiral moves the optical axis in the optical axis direction.

The image forming section 4 is configured, for example, as shown in FIG. That is, the platen drum 22 is disposed substantially at the center of the image forming section 4. The periphery of the platen drum 22 is made of an elastic material such as rubber, and has a function as a platen roller of the thermal head 24. The platen drum 22 rotates the sheet P in the direction of arrow A in the figure to wind the sheet P around the peripheral surface so that the sheet P does not shift during the overlay printing. A pressure roller 25 is provided around the platen drum 22 to prevent the sheet P from floating from the platen drum 22 at predetermined intervals.
... are provided. The circumference of the platen drum 22 is slightly longer than the length of the maximum paper size in the longitudinal direction.

A thermal head 24 is disposed below the platen drum 22. The thermal head 24 is attached to a radiator integrally formed on the rear end face of the holder. And, between the platen drum 22 and the thermal head 24,
An ink ribbon 26 is interposed as an image forming medium. The cores 30 and 31 of the ink ribbon 26 are connected to a drive shaft of a motor (not shown) via a drive force transmission mechanism (not shown), and are rotated as required.

Further, a paper feed roller 41 is provided at a lower right portion of the main body 1 so as to take out paper P as an image forming medium stored in the paper feed cassette 20 one by one. The paper P extracted by the paper feed roller 41 is
42, is transferred toward the platen drum 22 via a guide 43, and is gripped by a gripper 23, a pressing roller 25,.
The sheet is wound around the platen drum 22, thereby enabling accurate sheet conveyance. Here, the paper feed cassette 20 is detachable from the side of the main body 1. Reference numeral 46 in FIG. 2 denotes a manual feed device for manually feeding paper P and the like. The sheet P supplied from the manual sheet feeding device 46 is also wound around the platen drum 22 in the same manner as described above.

The paper P, the tip of which is fixed by the gripper 23, is wound around the platen drum 22 by rotation in the direction of arrow A in the drawing, and after the tip passes through the printing area, the thermal head
24 is pressed against the platen drum 22, and printing is performed.

When the printing of the first color is completed, the platen drum 22 has been rotated substantially once. Where the thermal head
24 is released once, the ink ribbon 26 is wound up, and cueing of the next color is performed. Then, the platen drum 22 starts to rotate again in the direction of arrow A in the drawing, printing is performed by the thermal head 24, and the next color is overprinted (printed).

In this way, for full-color copying, yellow,
Image formation is performed by four operations of magenta, cyan, and black, or three operations of yellow, magenta, and cyan. In the case of a single color such as black, it is performed in one operation.

When discharging the paper, the platen drum 22 is rotated in the direction indicated by arrow A until the rear end of the sheet P reaches the discharge guide 27, and when the sheet P reaches, the platen drum 22 is moved in the direction indicated by arrow B. The paper P is rotated, and the rear end of the paper P is separated from the platen drum 22 by a separation claw (not shown) and guided to the paper discharge guide 27.
Finally, the paper P released from the gripper 23 from the leading end of the paper P and conveyed by the paper discharge guide 27 is discharged onto the paper discharge tray 28.

FIG. 6 schematically shows the overall control system, which includes a main control unit 81, a first sub-control unit 82, and a second sub-control unit 83. The main control unit 81 includes an operation panel 80, a memory 99, a correction circuit 84, a luminance / color difference separation circuit 85, an image quality improvement circuit 86, a color signal conversion circuit 87, a binarization circuit 88, a control board 200, and a first sub control unit 8.
It is connected to the second and second sub-control units 83, respectively, and controls these controls.

The first sub control unit 82 includes a light source control unit 89, a motor drive unit
90, photoelectric converter 11, A / D converter 91, and resolution converter 92
, Respectively, and are in charge of these controls. The light source control unit 89 is connected to the illumination lamp 6 and performs lighting control and light amount control thereof. That is, the illumination lamp 6 is turned on during a normal image reading operation.
The motor driving section 90 drives the scanning motor 18.

The second sub-control unit 83 is connected to the thermal head temperature control 93, the thermal head 24, various detection switches 94, and the drive unit 95, and controls these. The drive unit 95 includes a drive system 96 such as a motor and a solenoid.
And is driven.

The control board 200 controls the projector 100, and will be described later in detail.

The memory 99 converts the light reflected by the white reference plate 59 into A /
The D-converted reference data is recorded.

The correction circuit 84 normalizes the image data (after resolution conversion) obtained by A / D conversion of the reflected light from the document D and the reference data stored in the memory 99 (shading correction, that is, variation correction of the photoelectric converter 11). ).

Further, the color signal conversion circuit 87 will be described in more detail with reference to FIG. Luminance signal (I), color difference signal 1 (C1), color difference signal (C2) sent from image quality improvement circuit 86
Are sent to the color signal conversion circuit 87, and the color signal conversion circuit 87 outputs one of the signals Y, M, C, and B.
The two color signals are sent to the binary circuit 88. At this time, the above Y,
The selection of the M, C, and B color signals is performed by the main control unit 81. That is, as shown in the following table, the main control unit 81 sends Y,
The M, C, and B color signals are selected. The color signals are automatically and sequentially selected (for example, Y → M → C →
B order).

Next, a configuration for reading an image of a film original according to the present invention will be described. FIG. 8 is an external perspective view of the copier when the projector 100 and the screen unit 150 are mounted when reading an image on a film original. FIG. 1 is a cross-sectional view showing the structure of the main part of the image reading unit. FIG.

The projector 100 is configured so as to show a cross section and an external appearance in FIG. 1 and FIG. 13, respectively, and remains mounted on the copying machine main body 1. That is, a lamp house 101 houses a halogen lamp 102 as a light source, and light emitted from the halogen lamp 102 is condensed by a condenser lens 103 and irradiated on a film 10 held in a holder (not shown). It has become. The light transmitted through the irradiated film 104 is projected onto a screen unit 150 by a projection lens 105. A cooling fan 120 (not shown) is provided inside the projector 100 (see FIG. 14) to cool the halogen lamp 102 and the film 104.

An operation panel 106 is provided on one side surface of the projector 100. On the operation panel 106, a mode selection switch 107 and an indicator 108 indicating the selected state of the mode selection switch 107, and a negative / positive switch 108 and an indicator 110 indicating the switching state of the negative / positive switch 108 Is provided. The above mode selection switch 107
Is used to select the normal copy mode or the projector mode. Each time the button is pressed, the normal copy mode and the projector mode are alternately selected, and when the projector mode is selected, the display 108 is displayed. It is lit. The selected state of the mode selection switch 107 is sent to the control unit of the copying machine. Also,
The negative / positive changeover switch 108 switches whether the mounted film 104 is a positive film such as a slide film or a negative film. Each time the switch is pressed, the negative / positive switch is alternately performed. And
The display 110 is turned on according to each switching state. And this negative / positive changeover switch
The switching state of 108 is also sent to the control unit of the copying machine, and is used to determine whether or not to perform image processing for converting to a positive image when a negative film is mounted later. .

The supply of power and the transmission and reception of signals to and from the projector 100 are performed by a control board 200 (see FIG. 1) provided in the copying machine main body 1. That is, DC power to the projector 100 is supplied by the signal cable S1 for various signals, and AC power and various signals to the control unit of the copying machine are supplied by the signal cable S2. FIG. 14 shows a power supply system and a signal wiring state between the copying machine main body 1 and the projector 100.

FIG. 15 shows an electric circuit of the operation panel 106 of the projector 100. That is, a mode selection signal is output from the mode selection switch 107, and a negative / positive switching signal is output from the negative / positive changeover switch 109, and is output to the main controller 81 of the main body 1. The main control section 81 of the main body 1 receives a projector mode signal, a positive film signal, and a negative film signal to control the lighting of the displays 108 and 110. In addition, only one of the two indicators 110 is turned on contrary.

The screen unit 150 is configured to have a cross section and an external appearance shown in FIGS. 1 and 8, respectively, and is detachably attached to the fixed scale 50 of the basic copying body 1. That is, the screen unit 150
A mirror 151 that reflects the optical path of the light output from the projection lens 105 of the projector 100 in the horizontal direction and converts the optical path into the vertical direction, and aligns the optical path of the light reflected by the mirror 151 in the vertical direction with respect to the document table. It is composed of a Fresnel lens 152 and a screen 153 that captures light transmitted through the Fresnel lens 152. Further, as shown in FIGS. 9 and 10, a mounting member 155 is provided at an end of the screen unit 150, and a hole provided in this member 155 is provided at an end of the fixed scale 50. Pin 15
The screen unit 150 is mounted on the fixed scale 50 by being fitted to the fixed scale 6. Therefore, as described above, in order to correctly read the image of the document D, if the correction of the shift or the inclination between the image G and the paper P is performed by adjusting the position of the fixed scale 50, the position adjustment in the case of combining the film images is performed. Can be done at the same time.

Next, the operation in the above configuration will be described. First, a case where a normal document D is read will be described. First, the operator removes the screen unit 150 from the second document. Then, the user operates the mode selection switch 107 of the operation panel 106 of the projector 100 to set the normal copy mode. As a result, a mode is set in which an image is read by operating the document D on the document table 2. Next, the operator operates the main body 1
The copy conditions such as the magnification are designated by the operation panel. Then, the main controller 81 determines the copyable range (width in the vertical direction) based on the size of the paper P in the paper cassette 20 and the copy magnification, and drives the motor 58 according to the determination result. Thus, the hands 51 and 52 are moved, and a copyable range determined by the designated copy conditions and the size of the sheet P is indicated.

In response to this instruction, the operator places the document D and turns on a copy start key (not shown). Then, the main controller 81 drives the motor 58 to move the hands 51 and 52 to a position where the width of the document is equal to or larger than the maximum document width (for example, 297 mm for A2 size), that is, the non-image portion. In addition, the main controller 81 turns on the illumination lamp 6 and moves the first and second carriages 7 and 8. Thus, the light from the illumination lamp 6 is applied to the white reference plate 59 and the document D via the document table 2.

The light reflected from the white reference plate 59 and the document D is guided to the photoelectric converter 11 via the mirrors 13 and 8a, the lens 9, and the mirrors 10a and 10b in this order. This photoelectric converter 11 separates the light into analog color signals of cyan (C), green (G), yellow (Y), or red (R), green (G), and blue (B), and Send to D converter 91. The A / D converter 91 converts each analog color signal into a digital signal. The signal from the A / D converter 91 by the white reference plate 59 is stored in the memory 99 as reference data. And A / D
The signal of the document D from the converter 91 is output to the resolution converter 92.

The resolution conversion unit 92 performs resolution conversion so that the resolution of the photoelectric converter 11 and the resolution of the thermal head 24 match, and sends the result to the correction circuit 84. At this time, the photoelectric converter
When the resolution of the thermal head 24 is the same as that of the thermal head 24, the resolution conversion processing is omitted. The correction circuit 84 normalizes the C, G, Y or R, G, B color signals sent from the resolution conversion unit 92 using the reference data stored in the memory 99, that is, performs photoelectric conversion. A correction process (shading correction) is performed to correct the variation of the converter 11, and the result is sent to the luminance / color difference separation circuit 85. Luminance / chrominance separation circuit 85
Performs various arithmetic processing on the C, G, Y or R, G, B color signals sent from the correction circuit 84, and outputs a luminance signal (I), a color difference signal 1 (C1), and a color difference signal 2 (C2). )
The image is sent to the image quality improvement circuit 86. The image quality improvement circuit 86 analyzes the luminance signal, the color difference signal 1 and the color difference signal 2 sent from the luminance / color difference separation circuit 85, performs image quality improvement processing such as edge coordination and character identification, and sends it to the color signal conversion circuit 87. . The color signal conversion circuit 87 includes a luminance signal, a color difference signal 1,
The color is related to the color difference signal 2 so that yellow (Y),
Cyan (C), Black (B) [Three primary colors (Y, M,
C) plus any one of the color signals (signal corresponding to the density), and the binarization circuit 88 converts the color signal into a color signal conversion circuit 87.
Color signal (any one of Y, M, C, B)
Area conversion by dither method or the like, that is, 2
The binarization is performed, and the binarization signal is sent to the thermal head temperature control unit 93. The thermal head temperature controller 93 sends a print signal to the thermal head 24 based on the binarization signal supplied from the binarization circuit 88.

Further, in response to the input of the copy start key (not shown), the paper P in the supply cassette 20 is taken out by the paper feed roller 41, and the taken out paper P is conveyed by the conveyance roller 42 and is guided through the guide 43. To the platen drum 22, and the tip is fixed by the gripper 23. Thus, the sheet P is wound around the platen drum 22.

In accordance with such a state, the thermal head 24 is pressed against the platen drum 22 and performs printing (that is, image formation) on the paper P wound around the platen drum 22 in accordance with the print signal. Then, the above operation is performed for Y, M, C,
By repeating the process for each color B, a full-color image is formed.

When the printing is completed, the main control unit 81 turns off the illumination lamp 6, discharges the paper P wound around the platen drum 22, and ends the copying operation.

Next, an operation when reading an image of a film original will be described. First, the operator mounts the screen unit 150 on the document table 2. At this time, the fixed scale 50
If it is assumed that the image G and the paper P are adjusted to be in the normal positions, the position adjustment of the screen unit 150 is unnecessary. Then, the operation panel 1 of the projector 100
By operating the mode selection switch 107 of 06, the projector mode is set. As a result, the halogen lamp 102 of the projector 100 is turned on, and a mode is set in which the image projected on the screen 153 of the screen unit 150 is scanned to read the image. Next, the operator designates copy conditions such as magnification by using the operation panel of the main body 1. At this time, the main control unit 81
Does not move the pointers 51 and 52 indicating the copyable range.

Next, the operator mounts the film original 14 on the projector 100 and turns on a copy start key (not shown). Then
The main control unit 81 does not turn on the illumination lamp 6 and
The carriages 7, 8 are moved. This allows the screen 153
Is projected from the film original 104 of the projector 100 onto the photoelectric converter 11 via the mirrors 13, 8a, 8b, the lens 9, and the mirrors 10a, 10b in that order. At this time, the white reference signal used for the shading correction is obtained not from the white reference plate 59 provided on the fixed scale 50 but from a predetermined portion of the screen 153.

The white reference signal and the light transmitted through the screen 150 and guided to the photoelectric converter 11 are transmitted to the photoelectric converter 11 by cyan (C), green (G), yellow (Y), or red (R). The signal is separated into green (G) and blue (B) analog color signals and sent to the A / D converter 91. The A / D converter 91 converts each analog color signal into a digital signal. The white reference signal from the A / D converter 91 is stored in the memory 99 as reference data. And A / D
The signal of the film original 14 from the converter 91 is supplied to a resolution converter 92.
Output to Subsequent operations are the same as those in the case of reading the above-described normal document D, and thus description thereof is omitted.
If the film original 14 is a negative film, the main control unit 81 is notified by a negative / positive switch signal from a negative / positive switch 109 provided on the operation panel 106 of the projector 100. Under the control of the main controller 81, image processing for converting into a positive image is performed.

As described above, in the image input device that optically scans the original D on the original platen 2, guides the original D to the photoelectric converter 11 by an optical system including a mirror and a lens, and photoelectrically converts the original, and inputs the image, the projector 100 projects the original. When the screen 153 for displaying the projected image is fixed to and fixed to the fixed scale 50 and the relative positional relationship between the fixed scale 50 and the optical system is adjusted during normal copying of the original D, the projector 100
Can also adjust the positional relationship between the screen and the optical system at the time of copying by the screen unit. It is possible to input an image without side shift or tilt without adjusting the 150 again.

[Effects of the Invention] As described above in detail, according to the present invention, an image input apparatus capable of inputting an image without a lateral shift or a tilt even if the image has a lateral shift or a tilt due to a positional shift of the optical system is provided. it can.

[Brief description of the drawings]

1 is a view for explaining an embodiment of the present invention, FIG. 1 is a view showing a structure of a main part of an image input apparatus, FIG. 2 is a cross-sectional view schematically showing an entire configuration of a copying machine, FIG. 3 is a view for explaining the arrangement of the hands and the white reference plate, FIG. 4 is a view for explaining the main part of FIG. 2, and FIG. 5 is a schematic perspective view showing a part of the structure. FIG. 6, FIG. 6 is a block diagram schematically showing an overall control system, FIG. 7 is a block diagram for explaining a color signal conversion circuit in detail, and FIG. 8 is an external perspective view when a projector is mounted. FIG. 9 is a perspective view for explaining a connection state of the fixed scale and the screen unit, and FIG.
FIG. 10 is a cross-sectional view for explaining the state of connection between the fixed scale and the screen unit, FIG. 11 is a diagram for explaining the positional deviation between the image and the paper and a method for correcting the misalignment, and FIG. FIG. 13 is a diagram for explaining the correction method.
FIG. 14 is a perspective view showing the external appearance of the projector, FIG. 14 is a connection diagram showing the connection between the copying machine main body and the projector, and FIG. 15 is a diagram showing a configuration of an electric circuit of an operation panel of the projector. 2 ... original platen, 3 ... original scanning section, 4 ... image forming section,
11 photoelectric converter (photoelectric conversion means), 24 thermal head, 26 ink ribbon (transfer material), 50 fixed scale (positioning means), 100 projector (film projection device), 150 …… Screen unit, 153 ……
Screen (display means), 157: adjustment mechanism (adjustment means), D: original, P: paper.

Claims (1)

(57) [Claims] 1. An image input apparatus for optically scanning a document on a document table, guiding the light to photoelectric conversion means by an optical system, and performing photoelectric conversion to input image information, comprising: a document table on which the document is placed; A positioning reference member for adjusting the position of a document placed on a platen; holding means for holding the position of the positioning reference member with respect to the optical system in an adjustable manner; a film image projection device for projecting an image of a film document; A part of the film image projection device is attached, and an attachment member provided integrally with the positioning reference member, and an image of a document placed on the document table and projected by the film image projection device. Optical means for scanning an optical image and guiding it as an optical image; and photoelectric conversion means for photoelectrically converting the optical image guided by the optical means. An image input apparatus characterized by positional adjustment operation for the film image projecting device with the adjusting operation of the reference member decided is made.