JPH03241980A - Film scanner - Google Patents

Abstract

PURPOSE:To improve the loading performance by loading a film being a read object to a film loading drum whose face supporting a film being an object of conversion is formed to be a transparent cylinder. CONSTITUTION:A transparent material is provided at only a film loading part 17 as a cylinder with an excellent transmission rate in a visual ray region and its part is notched. Similarly, only a filter 18 of (ND filter 18a, R filter 18b, G filter 18c and B filter 18d) each filter region of the filter drum 16 forms a cylindrical face and the other part is notched. Then a loaded negative or positive film 5 is loaded to an outer circumference of the film loading part 17 of the film loading drum 15 while the curved face is directed inward. Thus, the film 5 is loaded in an natural form without being irrationally corrected.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a scanner device as a means for inputting an image to, for example, a personal computer monitor. The present invention relates to a film scanner device for A/D converting an image of a transparent original and inputting the image.

[Conventional technology]

Scanners used as human-powered image devices generally include light-reflecting type scanners and light-transmitting type scanners.

Among these, the light reflection type is intended for paper originals, and inputs images by irradiating light onto the input original and photoelectrically converting the light image reflected from the surface of the original. On the other hand, the light-transmissive type is intended for transparent film originals, and inputs images by irradiating light onto the input original and photoelectrically converting the optical image obtained by transmitting light through the original surface.

The general configuration of this light transmission type image input device, in other words, a film scanner device, is shown in the schematic configuration diagram of FIG.

In the figure, the optical system includes a light source 1 arranged along the optical axis.
, an illumination lens 2, an imaging lens 3, and a photoelectric conversion element (
For example, it is composed of a CCD line image sensor 5 (hereinafter referred to as CCD) 4. A film 5 to be input is placed between the illumination lens 2 and the imaging lens 3, and a filter 6 is further placed between the illumination lens 2 and the film 5. The film 5 has a flat film mounting surface 8
For example, in the case of line sequential processing, the film 5 is fixed and a filter 6 having color filter areas of R (red), G (green), and B (blue) is switched by a filter switching mechanism 10 for one line of the film. It is sent three times and read by CCD4. This means that one line has been read. Next, the film 5 is fed one line in the vertical direction (sub-scanning direction) in the figure by the film feeding mechanism 9, and the filter 6 is similarly switched to perform photoelectric conversion by the CCD 4. By performing this for all lines, image processing for the upper frame is performed.

[Problem to be solved by the invention]

Incidentally, in the conventional film scanner device as described above, a film feeding mechanism 9 is provided for sub-scanning the film 5, and a filter switching mechanism IO is provided for switching the filter 6.

Each of these mechanisms is equipped with a motor, such as a stepping motor, as a driving source. In other words, two mechanisms and two motors are provided to drive the film 5 and the filter 6, resulting in an expensive mechanism. In addition, since the film itself is originally wound around a core and stored in the cartridge, it has curling curls, and there are some sides coated with silver salt, etc. for image formation, and other sides not coated with anything. This makes it difficult to maintain flatness even after development. Therefore, even when such a film 5 is mounted on the flat film mounting surface 8, it is actually difficult to ensure flatness, and there is a problem in mounting performance. Furthermore, if such flatness cannot be ensured, reading errors may occur when reading an image.

This invention was made in view of the above technical background, and its purpose is to provide a low-cost, high-precision film scanner device that can be driven by a single motor and has good film mounting properties. It's about doing.

[Means to solve the problem]

The above purpose is to provide a film mounting drum, a filter drum disposed coaxially inside the film mounting drum, a light source including an illumination lens disposed inside the filter drum, and a light source including a light source disposed inside the filter drum. a lens section that transmits through the film section, receives and focuses the emitted light;
They are distantly related by being provided with a photoelectric conversion element that receives and photoelectrically converts condensed emitted light, and a drive mechanism that includes one motor that rotationally drives the film mounting drum and the filter drum. In this case, the film mounting drum has a transparent cylindrical surface that holds at least the film to be converted, and predetermined filter areas are arranged in parallel on the filter drum in a direction perpendicular to the rotation direction.

[For production]

According to the above means, the film is mounted on the outer periphery of the transparent cylindrical portion of the film mounting drum, and the film mounting drum and the filter drum are each rotationally driven by a drive mechanism that is given driving force by the drive motor. . That is, the film is mounted in a curved state along the curved surface of the transparent cylindrical part of the film mounting drum, and by irradiation from the light source side inside the film, it is line-scanned from a direction parallel to the rotating shaft, and the sub-scanning direction is The film can be fed by rotating the film mounting drum. Thereby, the film can be mounted in a curved state without having to be flat, and reading in the main scanning direction and the sub-scanning direction becomes possible. During this reading, the filter mounting drum also rotates to switch the filter area. In this way, since both drums are rotationally driven coaxially, driving of both drums can be easily performed by switching the driving force from one driving source.

〔Example〕

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

FIG. 1 is a schematic configuration diagram showing a film scanner device according to an embodiment. In the following description, each part that is equivalent to that of the conventional example is given the same reference numeral, and redundant description will be omitted as appropriate.

The film scanner device according to this embodiment has a light source section 11.
, a film/filter arrangement section 12 , and a photoelectric conversion section 13
It is mainly composed of.

The light source unit 11 includes a light source l made of, for example, a halogen lamp,
A reflective mirror 14 that cuts and reflects infrared rays of the irradiation light emitted by the light g1, a light source 1, and a reflective mirror 1.
It consists of an illumination lens 2 that collects the irradiated light from 4 and emits it to the side of a filter 6, which will be described later.

The film/filter arrangement section 12 is composed of a cylindrical film mounting drum 15 and a similarly cylindrical filter drum 16 disposed concentrically inside the film mounting drum 15. As shown in the perspective view of FIG. 2, the film mounting drum 15 has a cylindrical film mounting portion 17 made of a transparent material with good transmittance in the visible light region, and that portion is cut out. Similarly, as for the filter drum 16, as shown in FIG. 3, only the filter 18 portion formed by each filter area (ND filter 18a, R filter 18b, G filter 18c, B filter 18d) forms a cylindrical surface, and the other portions are cut. It's missing.

The negative or positive film 5 to be input is mounted on the outer peripheral side of the film mounting portion I7 of the film mounting drum 15 with the curved surface facing inside.

As a result, the film 5 is not forcibly corrected into a flat shape and can be mounted in a more natural state. In addition,
The diameters of the film mounting drum 15 and the filter drum 16 are adjusted so that the light source 1
It is determined by taking into account the lighting conditions and the illumination lens 2. Further, the film mounting drum 15 and the filter tram 16 are formed with notches as described above, and these notches make it possible to arrange the reflection mirror 13 of the light source section 11 inside the filter drum 16. At the same time, heat generation from the light source 1 can also be dealt with.

Although the drive mechanism for driving the film mounting drum 15 and the filter tram 16 is not particularly shown, for example, a driven gear is provided at one end side of the film mounting tram 15 and the filter drum 16, and the driving force from one drive motor is applied to the driven gear. A drive mechanism is introduced that includes a group of gears that switchably transmits transmission to the driven gear side via a clutch mechanism and a switching mechanism. In this case, a stepping motor is preferably used as the drive motor. Since these drive mechanisms include rotation switching and are commonly employed mechanisms, detailed explanations will be omitted here. Further, in this embodiment, the ND filters 18a, R, and G.

Each of the filters 18b, 18c, and 18d of B has an arc shape, but each of these filters 18a, 18b
, 18c, and 18d may be connected linearly. That is, it may be formed in a planar shape. In addition,
The ND filter 18a is used for reading a monochrome image and for initializing.

The photoelectric conversion unit 13 includes an imaging lens 3, a filter 19, and a C0D
(array) 4, which is arranged so that transmitted light emitted from the light source section 11 and transmitted through the filter section 18 and the film 5 can be imaged on the CCD 4.

In the film scanner device configured as described above, the light emitted from the light source 1 is also reflected from the reflection mirror 14 and is incident on the illumination lens 2 with efficient use. This lighting system is based on the Kohler system to reduce uneven lighting. The light emitted from the illumination lens 2 is passed through R2O and B filters 18b and 18c, which are sequentially switched by a drive mechanism.
, IL (passes through, and is irradiated onto the film 5. The light that passes through the film 5 and contains the film image data passes through the imaging lens 3 and the filter 19 consisting of a trimming filter or IR cut filter, etc. Only the light component that is If there is, the film 5 is fixed and the filter drum 16 is rotated by the drive mechanism to perform R and G for one line of the film 5.

Each filter 18b, 18c, 18d of B is switched and read by the CCD 4 three times. Next, the film mounting drum 15 is rotated by a drive mechanism to feed one line, and each of the R, G, and B filters 18b, 18c, 1
8d and read one line in the same way. In this way, filter R, G, B, B one line at a time.

Color image information is obtained by switching in reverse order, such as G and R. In this case, the reading resolution is C in the main scanning direction.
The sub-scanning direction is determined by the number of pixels of the CD 4 and the number of feed pitches of the drive motor.

〔Effect of the invention〕

As is clear from the above description, according to the present invention configured as described above, at least the surface that holds the film to be converted is formed into a transparent cylindrical film mounting drum, and the film to be read is read. Since the film is attached, there is no need to force the film into a flat shape, which improves the ease of attaching the film. Furthermore, since the film mounting drum and the filter drum can be driven by one motor, costs are also reduced.

[Brief explanation of drawings]

1 to 3 are for explaining the present invention in detail. FIG. 1 is a schematic configuration diagram of a film scanner according to the same embodiment, FIG. 2 is a perspective view of a film loading tram, and FIG. 3 is a perspective view of a film loading tram.
The figure is a perspective view of a filter drum, and FIG. 4 is a schematic diagram of a conventional film mounting drum. In the figure, 1 is a light source, 2 is an illumination lens, 3 is an imaging lens, 4
is a photoelectric conversion element (CCD), 5 is a film, 11 is a light source section, 12 is a film filter section, 13 is a photoelectric conversion section,
18 is a filter section.

Claims (1)

[Claims] (1) In a film scanner device that optically scans analog image information recorded on a transparent film surface and converts it into digital image information, at least the surface holding the film to be converted is formed in a transparent cylindrical shape. a film mounting drum, a filter drum disposed coaxially inside the film mounting drum, and having predetermined filter areas arranged in parallel in a direction perpendicular to the rotational direction; a light source section including an illumination lens, a lens section that receives and collects the emitted light emitted from the light source section and transmitted through the film section of the film mounting drum from the filter section of the filter area; What is claimed is: 1. A film scanner device comprising: a photoelectric conversion element that receives and photoelectrically converts emitted light; and the film mounting drum and the filter drum can be rotationally driven by one motor.