JP2563199B2 - Image reader - Google Patents

Description

The present invention relates to an image reading apparatus that projects a transparent original and outputs the captured image as read image information.

<Prior Art> Conventionally, in a film reading device capable of reading both films having different color characteristics such as a negative film and a reversal film, a basic density of the film (for example, in a negative film, an orange base portion is used to output an image In black, in the reversal film, the transparent base part, and in the output image, the white part), it is necessary to equalize the output when reading the CCD. Further, in the case of a color film, it is necessary to adjust the light amount of the three primary colors of colors, that is, red, green and blue.

Therefore, when reading a negative film, a cyan filter is used to correct the density of the film base.
The primary colors are balanced. Furthermore, when reading the reversal film, it is necessary to use the ND filter corresponding to the density of (base) + (cyan filter) in order to make the same conditions as the negative film.

Next, the light amount of the lamp used as the light source decreases with the use time, and there is uneven light amount in the illumination area of the lamp. Further, there is a variation in the sensitivity for each pixel of the CCD, and it is necessary to adjust the sensitivity for each pixel.

The above adjustment, that is, the shading correction needs to be performed by reading the basic density portion of the film with a CCD. Since the shading correction needs to be performed on the entire surface of the image to be read, when the negative film is used, the entire surface of the image portion is made with a film for shading having a base density. As a matter of course, in the case of a reversal film, the film is removed and the shading is performed.

The above operation is performed as follows in the conventional film reading apparatus. That is, the exchange of the film is performed by exchanging the unit holding the negative film and the positive film with the cyan filter and the ND filter provided respectively, and exchanging the unit holding the film. When the negative film is used, the shading correction is performed by placing the film for shading at the position of the negative film, and when it is the positive film, it is read by the CCD without the film.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional example, (1) it is necessary to mount a film for shading at the time of correcting the shading in the case of a negative film, and (2) the film is replaced when the film is replaced. Since the unit to be held must be exchanged, there was a drawback that the unit could not be shared between the negative film and the reversal film.

Further, in addition to the function of the film reading device of the conventional example described above, there is a film reading device provided with an optical viewer for the user to visually confirm the image of the film at the position readable by the CCD. Then, the optical path of the projected image of the film has two paths on the CCD side and the optical viewer side,
The user sees the projected image formed on the optical viewer side by switching the two with a mirror, but in general, the amount of light required by the CCD is too dark for humans to see. Therefore, when the projection image is switched to the optical viewer side, the cyan filter and the ND filter must be removed. Therefore, in the filter exchange method of the above-mentioned conventional example, it is necessary to remove the unit that holds the film each time there is a projected image on the optical viewer side.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks of the conventional example, and to provide an image reading apparatus capable of automating the loading and unloading of a plurality of filters according to the type of film and improving the operability.

<Means for Solving Problems> In order to achieve the above-mentioned object, the present invention is an image reading apparatus for projecting an image of a film on a reading unit, and a first filter which can be freely put in and taken out from a projection optical path, and the projection optical path. A second filter, which is different from the first filter, a discriminating means for discriminating the type of film set in the projection optical path, and first and second discs according to the type of film discriminated by the discriminating means. And a control means for controlling one of the two filters to be selectively inserted into the projection optical path.

Further, the reading unit reads an image and converts it into an electric signal.

Further, it is preferable that an optical member for selectively projecting the image of the film on the reading unit and the projection unit is provided, and the first and second filters are put in and taken out from a common optical path of the reading unit and the projection unit.

The discriminating means discriminates the negative or positive of the film.

<Operation> In the present invention having the above configuration, when the type of the film is discriminated by the discriminating means, for example, negative or positive, the control means inserts the first filter or the second filter into the projection optical path according to the type of the film. Since the required filter can be automatically taken in and out, the operability is improved.

Further, since the reading of the image is converted into an electric signal by the image reading unit, an appropriate image can be easily reproduced.

Further, the film image can be projected by either the reading unit or the projecting unit by switching the optical member, and the required parts of the first and second filters can be shared in both parts.

<Example> Hereinafter, an example of the present invention is described based on a drawing.

Fig. 1 shows the main part of a film reading device that projects a 35mm color negative film and a color reversal film, reads the projected image with a CCD line sensor, and converts it into an electric signal. The light emitted from the halogen lamp 1 is a condenser lens. 2, The film 4 is illuminated through the field lens 3. The projection image of the film 4 is moved by the solenoid 6 to the solid line position (CCD reading position) and the alternate long and two short dashes line position (optical viewer position) by the optical path switching mirror 5 so that the projection lens is in the solid line position.
An image is formed on the scanning surface 12 of the CCD 11 via the 7, ND filter 8, the reflecting mirrors 9 and 10, and the image is read by scanning the CCD 11 in the direction of arrow c. On the other hand, when the optical path switching mirror 5 is switched to the position indicated by the chain double-dashed line, the film 4
The projection image of is such that the projection image is projected on the optical viewer 17 through the reflecting mirror 13, the projection lens 14 for viewer, and the reflecting mirrors 15 and 16, and the optical viewer 17 is made of acrylic resin or the like through which light can pass. As shown in FIG. 2, one surface 17a is subjected to a semi-transparent diffusion process and is held by the apparatus main body 20, and a projection image is formed on the diffusion surface 17a by the projection lens 14 for the viewer, and the user side Can be seen from. 20a is an operation key.

Further, since it is necessary to read the negative film 4a in FIG. 3 and the reversal film 4b in FIG. 4 having different color characteristics as the film 4, the ND filter 18 and the cyan filter 19 are provided between the field lens 3 and the film 4 in the optical path. With respect to each, it can be inserted and removed in the directions of arrows a and b, respectively. And when reading the negative film 4a, the cyan filter 19 is required to correct the base density of the negative film 4a, and therefore, when the same lamp light amount is used, compared with the reversal film 4b, (base) + (cyan filter) Negative film only for concentration
Since the amount of light that illuminates 4a drops, in order to equalize the conditions, when reading reversal film 4b (base)
ND filter 18 equivalent to + (cyan filter) density
To use.

Further, on the side of the optical viewer 17, since a larger amount of light is required compared to the side of the CCD 11 so that the user can see well, the ND filter 8 is inserted in the optical path on the side of the CCD 11 as described above, and the CCD 11
By reducing the amount of light to the side, the amount of light on the optical viewer 17 side and the amount of light on the CCD 11 side at the same lamp light amount are adjusted.

Further, in the apparatus of this embodiment, it is necessary to perform the shading correction at a certain use interval and in a state where there is no image, and since the basic density of the image must be used, (base of negative film) + (cyan filter) or (ND filter) It is necessary to do it by the illumination which passed the density. Therefore, the ND filter 18 is put in the optical path in the state where there is no film 4 that satisfies the illumination by the two points, and the shading correction is performed.

Next, in the apparatus of this embodiment, when the obtained image data is output from a printer or the like, it is necessary to change the output direction of the image data. For example, when the image data is combined with other image data or character data, it is combined. It is necessary to align the direction of the image of the film 4 with respect to the image or the character. Therefore, the direction of the set position of the film 4 can be freely changed to four directions.

FIGS. 3 (a) and 3 (b) show a negative film carrier 21 for setting the negative film 4a, and a carrier upper plate.
The lower film 23 and the carrier lower plate 23 are openably and closably coupled by a shaft 24, and the negative film 4a cut into 6 frames is positioned by a positioning protrusion 23b provided on the lower carrier plate 23, and the upper carrier plate 22, the carrier 6 of each of the lower plates 23
The negative film 4a is set and sandwiched between the windows 22a and 23a so that the respective frames of the negative film 4a are aligned with each other, and as shown in FIG. 2B, the surface of the carrier upper plate 22 is provided with a carrier for the negative film. A projection 22b is provided at a position point-symmetrical with respect to the center of each window 22a so that the same condition is satisfied even if 21 is set from the opposite direction.

FIG. 4 shows a reversal film carrier 25 for setting the reversal film 4b. Since the reversal film 4b is generally mounted on the slide mount 27, the reversal film 4b has a different shape from the negative film carrier 21. Having a window portion 25a, the slide mount 27 is inserted from the insertion opening 25b and held by the spring 26 at the window portion 25a, and a plurality of slide mounts 27 are inserted into each window portion 25a, Similarly, the window 25a is also on the surface.
A pair of projections 25c are placed at point-symmetrical positions with respect to each center.
Is provided, but the position is shifted to the outside in the direction perpendicular to the transport direction of the protrusion 22b of the negative film carrier 21.

FIG. 5 shows a carrier holding unit 30 for holding a negative film carrier 21 and a reversal film carrier 25 in order to position the films 4a and 4b at the set position of the apparatus main body 20, and the films 4a and 4b respectively. The carrier 21 or 25 is inserted into the carrier holding unit 30 through the lateral insertion port 30a in the direction of the arrow d, and the carrier 21 or 25 is inserted.
The lower edge of the carrier pushes the carrier presence / absence switch 31a, and the carrier presence / absence switch 32a is actuated by the presence / absence of the carrier presence / absence switch 31a. When it is guided into the carrier holding unit 30, it will be automatically conveyed after the user releases the hand.

Then, the carrier feed roller 35 conveys the carrier 21 or 25, and when the protrusion 22b or 25c provided for each frame pushes the film set detection switch 36a or 36b, the conveyance of the carrier 21 or 25 is stopped. Therefore, the film set detection switches 36a and 36b are provided at positions where the projections 22b and 25c act when the carriers 21 and 25 come to the set positions. Film set detection switch 36
Film 4 that came to the set position when a or 36b worked
Since it can be discriminated whether the negative film 4a or the reversal film 4b, the filter suitable for the film 4, that is, the cyan filter 19 is inserted in the negative film 4a, and the ND filter 18 is inserted in the optical path when the reversal film 4b.

FIG. 6 shows a mechanism for loading and unloading the ND filter 18 and the cyan filter 19. The filter operating motor 41 is provided with a filter operating arm 42. When the filter operating motor 41 rotates counterclockwise in the drawing, it is cyan. The ND filter holder that holds the ND filter 18 when the filter operating motor 41 rotates clockwise in the drawing by pushing the axial pin 43a protruding from the cyan filter holder 43 that holds the filter 19 to the left in the drawing The shaft pin 44a protruding from the shaft 44 is pushed leftward in the drawing. By this, the rotation direction of the filter operating motor 41 is selected, and the cyan filter is selected.
Either of the 19, ND filters 18 can be inserted at the position of the chain double-dashed line (set position) in the optical path. At the set position of the cyan filter 19 or the ND filter 18, the cyan filter holder 43 or the ND filter holder 44 respectively operates the cyan filter set detection switch 45 or the ND filter set detection switch 46, the filter operating motor 41 stops, and the cyan filter 19 or the cyan filter 19 or The ND filter 18 is set to the set position. Further, when the cyan filter 19 or the ND filter 18 is retracted from the set position, the filter operating motor 41 rotates in the reverse direction, and the axial pin 43 of the cyan filter holder 43 is rotated by the filter operating arm 42.
When the pressing force of the a or ND filter holder 44 against the shaft pin 44a is released, the cyan filter 19 or the ND filter 18 retracts from the set position by the biasing force of the springs 47 or 48, respectively. When the filter operating arm 42 comes to the position indicated by the chain double-dashed line and pushes the filter retract detection switch 49, it can be seen that the cyan filter 19 or the ND filter 18 is retracted from the set position.

Therefore, as described above, when the film 4 stops at the set position, the image of the film 4 is once read by the CCD 11, the proper exposure amount is calculated based on the data, the applied voltage of the halogen lamp 1 is adjusted, and the lamp light amount is adjusted. Change
The amount of light received by CCD 11 is adjusted. And for the first time CCD
The image of the film 4 is read by 11 and output as image data. During this time, film 4 with CCD11
The optical path switching mirror 5 is rotated to the position indicated by the chain double-dashed line except that the image is read, and the image of the film 4 is displayed on the optical viewer 17. Therefore, during this period, the user can confirm which frame is at the set position.

When you want to scan the next frame, press the operation key 20
Operate a so that the next frame comes to the set position.
When the carrier feed roller 35 conveys the carrier 21 or 25, and the film set detection switch 36a or 36b is activated again, the carrier feed roller 35 stops and the carrier feed roller 35 stops.
21 or 25 stops. By repeating this operation, all frames in the carrier can be read. Depending on the operation method, all the frames in the carrier can be read with a single operation, or, for example, if the first frame and the third frame are designated, only the first frame and the third frame are read. It is also possible.

When the reading of the film 4 in the carrier 21 or 25 is completed, the operation key 20a is used to convey the carrier 21 or 25 to the right in FIG. 5 to a position where the carrier presence switch 31a is not turned off. Here, when the user pulls out the carrier 21 or 25, the carrier presence switch 31a is turned off, and it is possible to detect that the carrier 21 or 25 is not in the carrier holding unit 30, and the next carrier 21 or 25 is inserted. It will be in a standby state until it is done.

Although the carrier 21 or 25 is carried by the carrier feed motor 32 in the carrier holding unit 30 in the above description, even when the user carries the carrier 21 or 25 by himself, the carrier feed roller 35 and the carrier 21 are carried. Or, only slippage between 25 does not interfere with the mechanism. Further, since the carrier presence / absence switch 31a and the film set detection switches 36a, 36b operate in the same manner as described above, the apparatus itself can grasp the type of the film 4 and the state of the set position.

Further, in this embodiment, the carrier holding unit 30 shown in FIG. 5 has a vertical insertion opening at its upper portion so that the direction of the film 4 at the set position can be freely changed to four directions.
30b is provided, and the horizontal insertion port 30a described above is used for the vertical insertion port 30b.
Switch with or without carrier 31b, Carrier feed motor
37, the carrier feed motor 37 and a carrier feed roller 40 that rotates via gears 38 and 39, and film set detection switches 36c and 36d.The carrier 21 or 25 can be read in the same manner in the vertical direction as in the horizontal direction. It is possible. The other direction can be dealt with by inserting the carrier 21 or 25 from the opposite direction.

<Effects of the Invention> As described above, the present invention provides a first filter which can be freely inserted into and removed from the projection optical path, and a second filter which is different from the first filter.
A filter, a discriminating means for discriminating the type of film set in the projection optical path, and either one of the first and second filters is selectively inserted into the projection optical path according to the type of film discriminated by the discriminating means. By providing the control means for controlling so that the filter suitable for the type of film can be automatically selected, the operability thereof can be remarkably improved.

Further, the image reading unit converts the reading into an electric signal, so that the image can be easily and surely reproduced.

In addition, an optical member for selectively projecting the image of the film on the reading unit and the projection unit is provided, and the first and second filters are put in and taken out from the common optical path of the reading unit and the projection unit. For the purpose, the image of the film can be easily projected on either the reading unit or the projecting unit, and both the filters can be shared by both the units, so that the cost can be reduced.

Further, the discriminating means discriminates the negative and the positive of the film, and by adopting the negative film and the reversal film which are frequently used, the operability is improved and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a film image reading apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view of an optical viewer portion thereof, FIG. 3 is a carrier for a negative film, and FIG. Perspective view of the main part of the time, (b) shows the plan view,
FIG. 4 is a perspective view of a carrier for reversal film, and FIG.
FIG. 6 is a schematic configuration diagram of a carrier holding unit, and FIG. 6 is a schematic configuration diagram of a filter loading / unloading mechanism. 4 ... Film (transparent manuscript), 4a ... Negative film, 4b
...... Reversal film, 5 ...... Optical path switching mirror, 7 ...
… Projection lens, 11 …… CCD, 14 …… Viewer projection lens, 17 …… Optical viewer, 18 …… ND filter, 19 …… Cyan filter, 21 …… Negative film carrier, 25…
… Carriers for reversal film, 41 …… Filter operating motor, 42 …… Filter operating arm, 42 …… Cyan filter holder, 44 …… ND filter holder.

Claims (4)

(57) [Claims] 1. An image reading apparatus for projecting an image of a film on a reading unit, a first filter which can be inserted into and removed from a projection optical path, and a second filter which can be inserted into and extracted from the projection optical path and which is different from the first filter. Discriminating means for discriminating the type of film set in the projection optical path, and either the first filter or the second filter is selectively inserted into the projection optical path according to the type of film discriminated by the discriminating means. An image reading apparatus comprising: a control unit for controlling. 2. The image reading apparatus according to claim 1, wherein the reading unit reads an image and converts the image into an electric signal. 3. An optical member for selectively projecting an image of a film onto the reading unit and the projecting unit, wherein the first and second filters are put into and taken out from a common optical path of the reading unit and the projecting unit. The image reading apparatus according to claim 1, wherein: 4. The image reading apparatus according to claim 1, wherein the discriminating means discriminates between a negative film and a positive film.