JPH0965058A - Film observing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To read exact information having no electromagnetic wave noise from a film by turning off illumination when reading magnetically recorded information or when moving the film for reading the information. SOLUTION: An illumination light source 4 is turned on through an illumination circuit 14, an image on a film 2 is picked up by driving an area sensor 6 through an image pickup circuit 13, and a processing signal is sent to a monitor. When a frame feeding switch is turned on, the operation of the circuit 14 is stopped and the light source 4 is turned off. Thus, no electromagnetic wave is generated from the circuit 14. After the light source 4 is turned off, a magnetic head 8 is operated through a reader circuit 15, next, a feeding motor 10 is operated through a motor driving circuit 12, and the film 2 is moved for feeding frames to right. While the film 2 is moved, a magnetic track formed at the lower part of the next frame is slid toward the magnetic head 8 and information is read out of such a magnetic track 2.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a film observing apparatus for observing a developed film, and more specifically,
The present invention relates to a film observing apparatus capable of reading information from a film capable of magnetically recording information on photographing.

[0002]

2. Description of the Related Art An example of a film observing apparatus capable of reproducing and observing an image on a developed film and reading information magnetically recorded on the film is disclosed in, for example, US Pat. No. 4,482.
924, 4974096 and 5258859.
Issue.

In these film observation devices, the screen on the film is illuminated, an image is taken by an image pickup means such as a CCD, and this image is displayed on a television screen or the like. Further, information such as a shooting date magnetically recorded for each film screen is read by a magnetic head, and this information is also displayed on the television screen.

[0004]

However, since information is recorded on the film by a weak magnetic signal, if an electromagnetic wave generation source is present around the magnetic head, accurate information will be recorded due to this influence. It may not be possible to read. Here, a fluorescent lamp is generally used for illuminating the film, but an electromagnetic wave is often generated from a driving circuit of the fluorescent lamp.

Therefore, a first object of the present invention is to provide a film observing device in which the illumination of the film does not interfere with the reading of the magnetic recording information.

[0006]

In order to achieve the above object, in the first invention of the present application, in a film observation apparatus for observing a film capable of magnetically recording information, a fluorescent lamp for illuminating the film, etc. The illuminating means, the reading means for reading the information, and the illuminating stopping means for stopping the operation of the illuminating means when the reading means reads the information. That is, the operation of the illuminating means is regulated (turned off), the information is read while the generation of the electromagnetic wave from the drive circuit is stopped, and the accurate information without electromagnetic noise can be read.

If the information is to be read while the film is moving, such as during frame feeding, the operation of the illuminating means may be restricted while the film is moving. Since the film screen is not observed during the frame feeding of the film, there is no problem even if the illumination is not performed during this period.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 is a plan view showing a configuration of a main part of a film observation apparatus according to a first embodiment of the present invention.
FIG. 2 is a front view of a film observed by this observation device.

In these drawings, reference numeral 1 is a cartridge containing a developed film 2, and the film 2 is wound around a spool 3 driven by a feeding motor 10 and pulled out from the cartridge 1. The film 2 has a screen (frame) 2a on which an image (not shown) is shown, and a magnetic track 2c formed in a belt shape below the screen 2a. The magnetic track 2c has date information and trimming information at the time of photographing. Information such as is magnetically recorded.

Reference numeral 4 denotes an illumination light source such as a fluorescent lamp. This illumination light source 4 is arranged on the opposite side of an area sensor 6 described later with the film 2 interposed therebetween, and illuminates the screen of the film 2 from the back side. Reference numeral 5 denotes an imaging lens, and the image of the film 2 illuminated by the illumination light source 4 is projected on the area sensor 6 through the imaging lens 5.

The area sensor 6 is a known image pickup means such as a CCD, converts an image projected on the area sensor 6 into electronic image information, outputs the information, and displays it on a monitor such as a television screen. Since the image processing from the area sensor 6 to the monitor is well known, its explanation is omitted here.

Reference numeral 7 is a photo sensor, and the photo sensor 7 is a perforation 2 formed on the film 2.
It is arranged on the movement line of b, and when it is detected facing the perforation 2b, the feeding motor 10
The signal for stopping the operation of is output. As a result, the screen of the film 2 is changed so that
Is positioned at a position opposite to.

Reference numeral 8 is a magnetic head.
Makes a sliding contact with the magnetic track 2c of the film 2 being fed and reads the information recorded on the magnetic track 2c.

Reference numeral 10 denotes a feeding motor, and the output of the feeding motor 10 is transmitted to the spool 3 via a gear 9. That is, by energizing the feeding motor 10,
It is possible to feed the film 2 such as frame feed.

FIG. 3 is a block diagram of a control circuit of the present film observation apparatus. In this figure, 11 is a CPU, and 12 is a motor drive circuit for operating the feed motor 11. Reference numeral 13 is an image pickup circuit that drives the area sensor 6 to process an image signal, and 14 is an illumination drive circuit that turns on the illumination light source 4. A magnetic information reading circuit 15 reads the information by operating the magnetic head 8. Further, reference numeral 16 is a frame feed switch for instructing frame feed of the film 2.

Next, the operation of the CPU (operation during frame feeding) will be described with reference to the flow chart shown in FIG. When the operation means (not shown) is operated to instruct the start of image capturing, in step 30 (S30), the illumination light source 4 is turned on via the illumination drive circuit 14, and the area sensor 6 is driven via the image capture circuit 13. The screen of the film 2 is imaged and the processed signal is sent to the monitor.

In step 31 (S31), it is determined whether or not the frame feed switch 6 is ON. When the frame feed switch 6 is OFF, this determination is repeated. When it is ON, the process proceeds to step 32 (S32), and the illumination drive circuit 14 The operation is stopped and the illumination light source 4 is turned off. As a result, no electromagnetic wave is generated from the illumination drive circuit 14.

After turning off the illumination light source 4, step 33 (S3)
3), the magnetic head 8 is passed through the magnetic information reading circuit 14.
Next, in step 34 (S34), the feeding motor 10 is operated via the motor drive circuit 12 to move the film 2 by the frame in the right direction in FIG. While the film 2 is moving, the magnetic track 2 formed under the next frame
c slides on the magnetic head 8 and the magnetic track 2
The information is read from c.

At this time, since the illumination light source 4 is turned off and no electromagnetic wave is generated, accurate information can be read without including electromagnetic wave noise. The read information is sent to the monitor after being subjected to necessary processing.

In step 35 (S35), it is judged whether or not the one frame feeding of the film 2 is completed based on the detection of the perforation 2b by the photo sensor 7, and when it is not completed, the feeding motor 10 is operated. When the process is continued and completed, the process proceeds to step 36 (S36) to stop the operation of the feed motor 10.

Subsequently, in step 37 (S37), the operation of the magnetic information reading circuit 14 is stopped, and in step 38 (S).
In 38), the illumination light source 4 is turned on again to enable the image pickup of the next frame.

In the above embodiment, the illumination light source 4 is turned off based on the operation of the frame feed switch 16, but in the present invention, for example, the operation of the feeding motor 10 is detected to turn the illumination light source 4 on. It may be turned off.

Further, the present invention may be used by combining the above-mentioned embodiments and modified examples, or their technical elements as needed.

Moreover, the present invention can be applied to various forms of film observing devices such as electronic cameras (still or video cameras), image processing devices, projector devices, and other optical devices and other devices.

(Relationship Between Embodiment and Claims) The illumination light source 4 and the illumination drive circuit 14 correspond to the illumination means in the claims. Further, the magnetic head 8 and the magnetic information reading circuit 15 correspond to the reading means in the claims. Further, step 32 in the CPU 11 corresponds to the illumination regulation means in the claims. Further, the feeding motor 10 and the motor drive circuit 12 correspond to the means for moving the film in the claims.

The above is the correspondence relationship between each configuration of the present invention and each configuration of the embodiment, but the present invention is not limited to the configuration of these embodiments, and the mechanism or the embodiment described in the claims is not limited thereto. Any structure may be used as long as the function of the structure can be achieved.

[0027]

As described above, according to the present invention, when the magnetic recording information is read or the film is moved for reading the information, the illumination which can be an electromagnetic wave generation source is turned off. Therefore, according to the present invention, accurate information without electromagnetic noise can be read from the film.

[Brief description of drawings]

FIG. 1 is a plan view of a film observation device according to a first embodiment of the present invention.

FIG. 2 is a front view of a film set in the film observation device.

FIG. 3 is a block diagram of a control circuit of the film observation device.

FIG. 4 is a control flow of the film observation device.

[Explanation of symbols]

 2 film 4 illumination light source 5 imaging lens 6 area sensor 7 photo sensor 8 magnetic head

Claims (3)

[Claims] 1. A film observing device for observing a film capable of magnetically recording information, comprising: an illuminating means for illuminating the film; a reading means for reading the information; and a reading means for reading the information by the reading means. A film observing device comprising: an illuminating regulating means for regulating the operation of the illuminating means. 2. The film observation apparatus according to claim 1, wherein the illuminating means uses a fluorescent lamp. 3. The reading means is adapted to read the information during movement of the film, and the illumination stopping means regulates the operation of the illumination means during movement of the film. Claim 1 or 2
The film observing device according to.