JPH0358664A - Film scanner - Google Patents

Abstract

PURPOSE:To decrease the floor area of the scanner and to make the size small by adopting the constitution such that a lighting optical system and a read optical system are formed stereoscopically in the vertical direction. CONSTITUTION:Lighting optical systems 51-56 and read optical systems 72-75 are arranged stereoscopically in two vertical directions while having an original moving base 61 in-between. In comparison with the case that the lighting optical systems and the read optical systems are formed on one and same plane, the floor area of the scanner is reduced. Moreover, since a film original is supported to the original moving base in the horizontal state, the loading/unloading of the film original is facilitated. Furthermore, since the lighting optical system is exposed by opening a movable cover 45, various components accommodated in an upper container are easily accessed to facilitate the job such as mainte nance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a film scanner that scans and reads film images and converts them into electrical signals.

[Conventional technology]

With the development of image processing technology, there is a growing need for film scanners that convert images of film originals such as photographic film into electrical signals.

This type of film scanner illuminates one side of the film original and focuses the film image on the other side of the carefully installed linear image sensor array.
2. Description of the Related Art Film scanners are known that perform sub-scanning of a projected image by moving a film original, and perform main scanning by electronic scanning of a linear image sensor array. A film scanner equipped with such an optical system or Optical Technology Contact Vol.
2B, No. 6 (1988), p. 430.

FIG. 4 is a diagram showing the configuration of the film scanner described in the above-mentioned document. This film scanner is a scanner container body that stores various parts on the same placement surface]
, an illumination optical system that illuminates the film original F, a film original M
A scanning block 2 moves the film F, and an image sensor array 3 consisting of a CCD captures the image of the film original IMF.
Reading optical system and image sensor array 3 projected onto the image sensor array 3
It is composed of an analog board 4 for A/D converting the output signal, a power supply 5, etc.

The illumination optical system includes a lamp 11 as a light source, a condenser lens 12 that deflects the illumination light emitted from the lamp 11, and a turret 1/filter 3 provided between the lamp 11 and the condenser lens.

The scanning block 2 includes film mounts 1 and 2 on which the film original F is mounted perpendicularly to the arrangement surface of the scanner container body, a mount 1 and a holder 22 provided with the film mount, and a mount holder. 22
It is composed of a feed table 23 attached to an end opposite to the condenser lens 12, a feed remoter 24, a feed screw 25, etc. for moving the feed table 23 in the sub-scanning direction.

The reading optical system includes a mirror 3 that reflects the illuminated film image of the film original F toward the linear image sensor 3.
], an imaging lens 32 for forming a film image reflected by the mirror 31 onto the linear image sensor 3, and the like.

In the film scanner configured in this way, the illumination light emitted from the lamp 11 passes through the turret filter 3.
After being converted into either R or GB color destination, the light enters the condenser lens 12.

This illumination light is converted into a luminous flux condensed at the pupil position of the imaging lens 32, and illuminates the film original F.

The film image of the film original F is reflected by the mirror 31 and guided to the imaging lens 32, and a reduced image of the film original F is formed on the linear image sensor array 3.

The main scan of the Finolem image formed on the linear image sensor array 3 is performed by electronic scanning of the linear image sensor array 3, and the feed motor 524 rotates the feed screw 25 to feed the feed table 23.
Sub-scanning is performed by moving the .

[Invention or problem to be solved]

However, in conventional film scanners, since the illumination optical system and the reading optical system are formed on the same plane within the scanner container body, there is a problem in that the floor area of the scanner container body becomes large. In particular, 'film original F
The size is 6cnI x 6cm, 6cm x 9cm
, 4 inches x 5 inches, this tendency becomes more pronounced as the thickness increases.

In addition, the illumination optical system and reading optical system are installed in the scanner container body 1.
In order to illuminate the film original F, the film original must be mounted perpendicularly to the horizontal plane, and for this purpose a mechanism is provided to hold the film original in a vertical position. A special mount holder 22 is required, making the mounting operation complicated.

Furthermore, a condenser lens 12 and a mount holder 22
In addition, the scanner container body 1 is sealed from light and dust, except for the part where the film 12 is attached, so various parts such as the condenser lens can be protected. Cleaning and other work was difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a film scanner that allows easy mounting and production of film originals and reduces the floor space of the apparatus.

Another object of the present invention is to provide a film scanner that facilitates maintenance work within the apparatus.

[Means to solve the problem]

In order to solve the above problems, the present invention illuminates one side of a film original supported on an original moving table, and displays a film image on a linear image sensor array installed on the other side of the film original. In this film scanner, the projected image is main-scanned by electronic scanning of a linear image sensor array, and sub-scanned by movement of the document moving table. a movable original moving table; an illumination optical system disposed above or below the original moving table that guides illumination light emitted from a light source to the film original; and the illumination optical system sandwiching the original moving table. and a reading optical system that is disposed on the side opposite to the linear image sensor array and that projects a film image produced by the Tfii illumination light onto the linear image sensor array.

In order to solve the above-mentioned problems, the present invention also includes a base plate that supports a film document and is movable in a predetermined force direction, and a base plate that deflects illumination light emitted from a light source by an optical deflection element to move one side of the film base plate. It includes an illumination optical system that illuminates a surface, and a reading optical system that forms a projected image of the film original by the illumination light on a linear image sensor array, and performs main scanning by self-scanning of the linear image sensor array to read the original. In a film scanner that performs sub-scanning by moving a movable table, there is provided an upper storage section having an opening in a side surface of one end and housing the illumination optical system, and at least the optical deflection element is attached to cover the opening of the upper storage section. As shown in FIG. did.

[Effect]

By taking the above measures, the illumination optical system and the reading optical system are arranged three-dimensionally in two directions, up and down, sandwiching the document moving table, so that the illumination optical system and the reading optical system can be placed on the same plane as in the conventional case. The floor space of the device can be much smaller than if it were installed indoors.

Further, by arranging the illumination optical system and the reading optical system as described above, the film original is supported on the original moving table in a state of water droplet, so that the operation of attaching and removing the film original is facilitated.

Furthermore, since the illumination optical system is exposed by opening the movable cover, various parts stored in the upper storage container can be easily accessed, making maintenance and other operations easier.

〔Example〕

Examples of the present invention will be described below.

FIG. 1 is a diagram showing the structure of a film gunner 9 according to a first length embodiment. 40 shown in the figure is a scanner container body, and the inside of this container body is divided into an upper storage portion 42 and a lower storage portion 43 by a partition plate 41. The upper storage part 42 has an opening on one side, and an opaque movable force member 45 covering this opening is attached to the container body 40 by a support shaft 44 and is rotatably attached to the container body 40 at {=1 I'm being kicked.

The upper housing section 42 houses a fish light optical system. This illumination optical system includes a light source lamp 51 and a light source lamp 51.
A heat ray absorption filter 52 disposed on the output a and t sides, a rotating filter 53 disposed at the convergence position of the fish light, and a first condenser lens 54 converging the illumination light that has passed through the rotating filter 53. , a mirror 55 that reflects the illumination light that has passed through the first condenser lens 54 in the vertical direction (downward in the figure), and a second condenser lens that focuses the reflected light of this mirror 55 at the pupil position of an imaging lens to be described later. It is composed of 56. The light source lamp 51, rotary filter 53, etc. of this illumination optical system are installed on the container body side of the upper storage section 42.
'NI has been kicked out. In addition, the first condenser lens 54 and the mirror 55 of the illumination 10 optical system
The second condenser lens 56 and the like are attached to the movable cover 45. In addition, 57 in the figure is a motor, which serves as a driving source for rotating the rotary filter 53. Furthermore, a second condenser lens 56 is provided in the opening of the movable cover 45.
A slit light shielding plate 58 having a hole formed at a position opposite to the center position is attached. This slit light-shielding plate 58 extracts only a light beam having a width along a main scanning line of a linear image sensor array, which will be described later, and cuts off other light beams that optically or thermally affect the film document F.

The lower storage section 43 includes an original moving table 61 disposed opposite the second condenser lens 56, a drive mechanism for moving this original moving table 61 in the sub-scanning direction (horizontal direction in the figure), and an original moving table. A reading optical system and the like for reading a projected image of a film original held by the film document 61 and converting it into an electrical signal is housed.

The Haraaki movable table 61 has a window 62 having a shape substantially similar to the outer shape of the film original F, and the film original F is held horizontally in this window 62. In addition, the 4 partition plates are
Areas facing two sides of the document moving table 61 are openings. The drive mechanism includes a motor 63 and a feed screw 6 connected to the output shaft of the motor 63 via a coupling 64.
5 and the feed nut 1 screwed onto this feed dog 65.
66, and the feed nut 1 and 66 are connected to the document moving table 6.
It is integrally attached to the bottom surface of 1. Further, the reading optical system and the like are constructed in the light-shielding housing 71,
A mirror 72 that horizontally reflects the projection light of the film original 11iF, an infrared light cut filter 73 that cuts the infrared light of the light reflected by the mirror 72, and an infrared light cut filter 73 that cuts the infrared light of the light reflected by the mirror 72. An imaging lens 74 that focuses on
and a linear image sensor array 75 on which a film image of the film original F is formed by the imaging lens 74. The linear image sensor array 75 consists of a large number of light receiving elements arranged in a direction perpendicular to the plane of the drawing in FIG. 1, and forms a main scanning line along the direction in which the light receiving elements are arranged. The output signal of the linear image sensor 12 array 75 is guided to a storage device or an image processing device that stores film image information.

Reference numeral 76 denotes a slit light-shielding plate, which guides only a light beam having a width along the main scanning line of the linear image sensor array 75 into the light-shielding housing 71 .

Next, the operation of the film scanner configured as described above will be explained. The illumination light emitted in the horizontal direction from the light source lamp 51 is absorbed by the filter 52 as heat rays, and is once focused on the rotating filter 53 .

The rotary filter 53 is rotated by a motor 57, and the incident illumination light is converted into one of R, G, and B colors.

Such illumination light is focused by the first condenser lens 54, reflected downward by the mirror 55, and enters the second condenser lens 56.

The second condenser lens 56 functions to focus the incident illumination light on the pupil position of the imaging lens 74. and,
The illumination light transmitted through the slit light shielding plate 58 is transmitted to the film original F.
to compare. The projected light from the film original F enters the light-shielding housing 7 through the slit light-shielding plate 76, and passes through the mirror 72.
The water reflected by 13 changes direction in the square direction. The infrared light is then cut by the filter 73 and enters the imaging lens 74 .

The projected light is focused on the imaging lens 74 at the pupil position, and a projected image of the film original F is formed on the linear image sensor array 75.

Then, with the projected image of the film original F formed on the linear image sensor array 75, main scanning is performed by electronic scanning of each light receiving element of the linear image sensor array 75.

Sub-scanning is performed by moving the document moving table 61. That is, the rotation of the motor 63 rotates the feed screw 65, and the feed nut 66 screwed onto the feed screw 65 rotates.
moves to the left and right in the figure.

As a result, the document moving table moves, and sub-scanning of the film document F is performed.

Note that at this time, line sequential scanning may be performed in which the rotary filter 53 is rotated once for each scanning line to read R, G, and B signals. Further, it is also possible to perform frame-sequential scanning in which the filter is switched every time the entire surface is scanned.

On the other hand, when a predetermined work is to be performed on the illumination optical system, the movable force 45 is raised to the state shown by the broken line in the figure. By opening the movable cover 45 as shown,
A large opening is formed at one end of the upper storage section 42, and
The upper surface of the document moving table 61 is exposed. Further, by removing the slit 1 and light shielding plate 58 attached to the movable cover 45, various deflection optical elements are exposed.

According to this embodiment, the scanner container body 40 is divided into the upper housing part 42 and the lower housing part 43, the illumination optical system is formed in the upper housing part, and the reading optical system is formed in the lower housing part 4.
3, and the optical paths of the illumination optical system and reading optical system are bent by optical deflection elements, and the optical axes of both systems are arranged parallel to each other. The floor area of the device can be reduced compared to forming the device in the same horizontal plane with respect to the floor surface, and the device can be made more compact. Moreover, since the heat emitted from the light source lamp 51 is dissipated by the partition plate 41, the linear image sensor array 75 can be effectively protected from the adverse effects of the heat of the light source lamp 51.

Also, by opening the movable cover 45 rotatably attached to the opening at one end of the upper storage section 42, the film original F
document moving table 6] and movable force bar 45 that holds the document horizontally.
By removing the slit transmissive plate 56, the deflection optical element attached to the deflection optical element is exposed, and an opening large enough to perform the work is created in the upper housing part 42, making it easy to access various optical elements such as the deflection optical element. At the same time, the film document F can be easily attached and detached, and work efficiency can be improved. Moreover, since the document moving table 61 is exposed, the set state of the film document F can be visually confirmed, and setting errors can be prevented.

Further, in the above embodiment, the movable cover 45 is provided on the illumination optical system rather than on the reading optical system side, but this is because the illumination optical system does not require higher precision than the reading optical system, and this makes it possible to This increases the degree of freedom in design, and also allows for a reduction in optical system accuracy due to vibration and distortion of the device due to opening and closing of the movable cover 45.

In the above embodiment, the outer wall of the scanner container body 4o may have a light-shielding and dust-proof function, or the container body 40 may be constructed of a frame, and this frame may be covered with a light-shielding and dust-proof cover.

FIG. 2 is a diagram showing the structure of a film scanner according to a second embodiment. This embodiment is an example in which a line illumination type fiber optic light guide 80 is provided in place of the first condenser lens 54 and mirror 55 shown in FIG. Note that the same parts as those of the film scanner shown in FIG. 1 are given the same reference numerals and detailed explanations will be omitted. The light guide 80 is a bundle of a plurality of fiber optics, with reference numeral 81 representing an optical end and reference numeral 82 an output end. The shaved end 82 has a plurality of fiber optics arranged in a straight line. Note that the light guide 80 and condenser lens 83 are mounted on a movable cover 45.

The light guide 80 takes in the illumination light that is horizontally emitted from the light source lamp 5, passes through the co-rotating filter 53, and condenses it on the Pl shape 1 7 from the human end 8 without cutting it, and straightens it. It is converted into a luminous flux, deflected in the vertical direction, and outputted from the output end 82. Here, even if the light beam emitted from the output end 82 is directly guided to the reading optical system, the light beam will travel straight while maintaining the width of the output end 82, so the viscous lens 7
Only the light beam at the center in the main scanning direction reaches the pupil position No. 4. In such a case, the projected image onto the linear image sensor array 75 will be bright at the center and very dark at the edges. Therefore, a condenser lens 83 is provided at the shaving end 82. This condenser lens 82 functions to bend the light flux emitted from the output end 82 toward the center and effectively converge all the light fluxes at the pupil position of the imaging lens 74 .

The second embodiment can also provide the same effects as the first embodiment.

Note that the present invention is not limited to the above embodiments.

For example, as shown in FIG. 3, an O1 changer 1890 may be provided for automatically changing the original film stripes. The basic structure of the film scanner shown in the figure is the same as that of the first embodiment, and the same parts are given the same reference numerals. In the autochanger 90, a film holder 92 is housed in each of a plurality of holder trays 91 arranged in a plurality of stages. Further, 46 shown in the same figure is a fixed frame on the side of the main body of the device, and this fixed frame 46 is attached to a movable force harness 45 or a four-wheel drive unit.
゛It is currently in high demand. 100 is a moving platform;
Slide shaft 101. , 102 to be movable in the sub-scanning direction. This mobile platform II. ．． The position of 00 is regulated by a lead screw 103.

The upper surface 104 of the moving table 100 serves as a sliding surface for the film holder 92 that is fed or fed from the autochanger 90. A guide 105 for positioning the film holder 92 is provided on the slide surface 1-04. In addition, the slide surface 104 of the Haraaki moving table 100
A fixed guide plate 106,
107 is provided. This fixed guide plate 106 forms an opening gate for entry and exit of the film holder 92.

According to such a film scanner, effects similar to those of the first embodiment can be obtained, and furthermore, film originals can be exchanged 1:1 dynamically.

[Effect of light]

As described in detail above, according to the present invention, the illumination optical system and the reading optical system are three-dimensionally configured in the downward direction, so that the floor area of the apparatus can be reduced and the apparatus can be made more compact. I can do it.

In addition, the upper storage section that houses the illumination optical system is equipped with a movable cover that exposes each component inside the storage section, making it easy to attach and remove film originals, as well as the parts that are stored inside the device. Maintenance work can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a film scanner according to a first embodiment of the present invention, FIG. 2 is a block diagram of a film scanner according to a second embodiment, and FIG. 3 is a block diagram of a film scanner equipped with an autochanger. 20 FIG. 4 is a block diagram of a conventional film scanner. 40...Scanner container body, 42...Upper storage section, 4
3... Lower storage section, 44... Support shaft, 45... Movable cover 51... Light source lamp, 54... First condenser lens, 55... Mirror 56... Second condenser lens, 6]...Document moving table, 71...Light-shielding housing, 72...Mirror 74...Imaging lens,
75...Linear image sensor array.

Claims (2)

[Claims] (1) One side of the film original supported on the original moving table is illuminated, and a projected image of the film original is formed on the linear image sensor array installed on the other side of the film original. In a film scanner in which a projected image is main-scanned by electronic scanning of a linear image sensor array and sub-scanned by movement of the document moving table, the document moving table supports the film document in a horizontal state and is movable in the sub-scanning direction. an illumination optical system disposed above or below the document moving table to guide illumination light emitted from a light source to the film document; and an illumination optical system disposed on the opposite side of the illumination optical system across the document moving table. , a reading optical system that forms a projected image of the film original by the illumination light on the linear image sensor array. (2) an original moving table that supports a film original and is movable in a predetermined direction; an illumination optical system that deflects illumination light emitted from a light source by an optical deflection element to illuminate one side of the film original; A reading optical system for forming a projected image of a film original by illumination light on a linear image sensor array, and main scanning is performed by self-scanning of the linear image sensor array, and sub-scanning is performed by movement of the original moving table. In the scanner, an upper storage part having an opening at one end side face and housing the illumination optical system; and at least the optical deflection element is attached and rotatably attached to the upper storage part so as to cover the opening of the upper storage part. A film scanner comprising: a movable cover attached thereto; and a lower housing section provided below the upper housing section and housing the document moving table and reading optical system.