JPS626584A - Card medium recording type camera - Google Patents

Abstract

PURPOSE:To have a large memory capacity, to observe a photographed picture at any time and to retrieve it as well by connecting serially a movable optical system for writing the information of an electric signal from a photoelectric converting element on a card medium to a surface consisting of the array of the photoelectric converting element for receiving an image on the surface making an incident light the image and converting into a digital and electric signal. CONSTITUTION:An entire constitution comprises an optical system O provided with a lens 2, an electric charge connection device CCD 10, a memory element 20, and a card writing part 30 provided with a card writing device 30a. In the card writing device 30a, the direction of light emitted from a light source is changed by a reflecting mirror 33, they are fed to a lens Assy 32, and in the lens Assy 32, the rays of light are made normal to a card 31 and irradiated on the card 31 by setting a focus. The lens Assy 32 is attached to a movable pedestal 36 and the movable pedestal 36 moves in the direction of (y) along a rail 41 fixed to a center yoke 42 through a wheel 34. A roller 40 is driven to move the card 31 placed on a belt in the direction of (x). In such manner, the card can be taken out to be retrieved and displayed at any time and since the digital signal is used, a picture processing is easily made.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to cameras, and particularly to a card medium recording type camera that performs optical recording on a removable card medium.

[Background of the invention]

Still images have been taken for a long time, and still cameras have a long history. It uses a film coated with a chemical that causes a chemical change when exposed to light as a recording medium.

Cameras using this film have become smaller and lighter and have higher quality images as technology advances. However, there are still some inconveniences as described below.

First, the number of frames of film normally used at home, etc. is 12, 24, 36, etc., and if the number of frames is increased extremely, the volume of the film becomes large, and there is a limit in terms of implementation. Therefore, it becomes necessary to change the film every time a certain number of pictures are taken.

In addition, from the economic point of view, if one film is loaded, one
I can't remove the book until it's used up. In addition, in order to view the film, development processing is required. In other words, it is inconvenient that when you want to view one image, you cannot select and view the desired frame.

Furthermore, recent advances in computer hardware and software have made it possible to perform various types of image processing, but when still photographs are used as source data for such processing, a device that digitally recognizes the images is required.

An electronic camera using a digital recording method is a device that compensates for the above-mentioned drawbacks of film-based cameras.

However, since a magnetic recording medium is still used as the medium,
The storage capacity is not very large, and the reliability of recording is likely to deteriorate due to magnetic noise, scratches, dust, etc., making it unsuitable for mounting, removing, and storing in a general environment.

A recording medium that satisfies the problems of the conventional recording media is disclosed in Patent Application Publication No. 500462 of 1981.

However, this structure cannot be used as a camera that images a subject on a medium.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a card medium recording camera that has a large storage capacity and allows photographed images to be viewed and searched at any time.

[Summary of the invention]

Recording images requires a large capacity. -8 as an example
The amount of information required to draw an image on a screen of 0wa x 100+m using dots is shown. One side of the dot shape is am
, and if there is either a dot or no dot on the screen, the amount of information B dot is B = 80 x 100/a''.The horizontal axis represents the size of the dot, that is, the resolution. If you take the amount of information on the vertical axis and draw a logarithmic graph, it will look like Figure 1.In practical terms, for text information on documents, one resolution is about 0.1m on an 80mm x 100a++ screen, and for other general subjects. If so, a resolution of about 0.1 to 0.01 mm would be required. Therefore, to draw a screen of this size with and without dots, 8 x 10
An amount of information of '~8XLO' bits is required.

Recording systems that are relatively inexpensive per recording density are magnetic and optical recording systems used in external memories of computers. In terms of capacity, optical recording is said to be several hundred times larger than magnetic recording. Furthermore, in order to increase the density of magnetic recording, the gap between the read/write magnetic head and the medium must be kept small or zero. In other words, it is not suitable for attaching, detaching, and storing media in a general environment where it is necessary to make contact with each other and there is a risk of dirt and dust floating around and causing scratches. Therefore, considering capacity and resistance to dust, etc., it is necessary to use an optical recording medium as the medium for this camera.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 2 to 5.

As shown in FIG. 2, the overall configuration of this embodiment includes an optical system 0 including a lens 2, a CCD (Charge
ed Devices; Charge-coupled devices (hereinafter referred to as CCDs)
) 10, a memory element 20, and a card writing section 30 including a card writing device 30a. A light ray from the subject 1 passes through the lens 2 and forms an image on the surface of the CCD10. The light beam from the subject 1 is photoelectrically converted in the CCD 10, and the image information becomes a digital electrical signal. This signal is temporarily stored in the memory element 20,
The memory contents are then optically recorded on the card 31 by a card writing device [130a].

In principle, CGDIO has a well-known structure as shown in FIG. When an image is formed on the surface of the imaging unit 11, charges are generated depending on the intensity of the light, and a voltage is applied to the transfer circuit 15 to sequentially send the charges to the readout storage unit 12, and the transfer circuit 15a
A voltage is applied to the output gate 13, and the charge is sent out from the output gate 13. In FIG. 3, the number of pixels in the imaging unit 11 is 12×4, but it is desirable to use one or more highly integrated CODs to increase the number of pixels to 10@bit or more.

Generally, the reading speed from the CCD 10 is faster than the speed at which the mechanism of the card writing device 30a is driven. Also,
There is a lower limit to the read speed in order to improve the S/N ratio.

Therefore, in order to adjust the speed of both, a memory element 20 for temporarily storing signals is provided.

A card writing device f1.30a optically records the signals stored in the memory 20 on the card 31, as shown in FIGS. 4 and 5.
The configuration is shown in the figure. The direction of the light emitted from the light source is changed by the reflecting mirror 33, and the light is sent to the lens As5y32.
The light is made perpendicular to the card 31 within the lens As5y32, focused and irradiated onto the card 31. Lens As5y3
2 is attached to a movable base 36, and the movable base 36 is a car @
34 in the X direction along a rail 41 fixed to a center yoke 42. The coil 37 is inserted into the magnetic field generated between the center yoke 42 and the outer yoke 35 by the magnet 43, and a current is passed through the coil 37 to drive it in the X direction. Also, step motor 3
8, the roller 4o is driven to move the card 31 on the belt 46, which is engaged between the roller 4o and 0-345, in the X direction.

Further, when recording the signals stored in the memory element 20 on the card 31, a circuit for the following recording method is provided in addition to the method for directly recording. This is a method of sequentially recording the number of series of 0 or 1 signals. This saves the recording area on the card when a blank area or a black area occupies a certain amount of continuous area, such as single character information.

Switch between both methods depending on the condition of the subject.

Furthermore, an index signal is inserted at the beginning of recording on the card 31 for each photographing session. According to the sixth embodiment, which facilitates retrieval during playback using this signal, it is possible to provide a camera that uses a card as a recording medium and uses a large-capacity optical recording system. Furthermore, according to the method of this embodiment, the card can be taken out and searched and displayed at any time, and since it is a digital signal, image processing is also limited. Furthermore, since the optical recording method uses non-contact recording, it has a long lifespan and can be removed and stored in a general environment.

FIG. 6 is a diagram illustrating another embodiment of the present invention. This embodiment uses an optical system and a small-capacity C0D 10a, for example, a one-dimensional array CCD. In this method, the image on the screen 3 is scanned by rotating the reflecting mirror 11 and sent to the CCD I Oa one part at a time. This embodiment also provides the same effects as the embodiment shown in FIG. Also, in this example, a small CCD 10
Since a is used, the cost of the photoelectric conversion element can be reduced.

Furthermore, the definition of one image can be increased by reducing the width of the scan.

FIG. 7 is a diagram illustrating still another embodiment of the present invention. In this example, instead of the card 31, the lens As5y3
2 is moved in the X direction by a step motor 51. This embodiment also provides the same effect as the embodiment shown in FIG.

In addition, as shown in FIGS. 8 and 9, in the card writing device 30a, there is a
The angle of the reflecting mirror 33a may be made variable. Card 31 and lens As5y32a do not move and reflect $133
a, 33a is 01. Moves in the Z direction of θ3. The focus is adjusted using the lens 52. Even with this method, the same effect as the embodiment shown in FIG. 2 can be obtained. Furthermore, according to this method, the card writing device 30a can be made lighter and smaller.

In the above embodiments, a CCD is used as an image sensor, but a photoelectric conversion element such as a MOS image sensor or a cell may also be used.

Since the camera according to the present invention uses an optical recording card medium, it can record a large capacity and has the function of recording a large number of images and fine images. Card recording area 90mm
55mm, and the recording pitch is X.

It has a capacity of 1.98 x 10" bits even if it is 5 μm in both the X direction, and if the two images are comparative lines such as character information, at least 240 80 ma x 100 mm (7) images can be taken with a resolution of 0.1 mm, and the resolution is fine. At least 2.4 images of 80 m x 100 nm can be taken with a resolution of 0.01 m.The number of images can be further increased by switching the recording method.

Also, since you can record an index signal on the card, you can take the card out and search and view it at any time, and then insert the card into the camera again.
There is a function to continue recording in empty areas.

Furthermore, since contactless recording can be achieved, the lifespan of the card medium is long, and it is possible to attach, detach, and store it in a general environment.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a camera that has a large storage capacity and allows captured images to be viewed and searched at any time.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the relationship between resolution and information amount in the present invention, FIG. 2 is a diagram explaining the overall configuration of an embodiment of the present invention,
Figure 3 is a circuit diagram showing the principle of the structure of the COD in Figure 2, Figure 4 is a side view of the card writing device in Figure 2, Figure 5 is a plan view of Figure 4, and Figure 6 is FIG. 7 is a plan view of a card writing device in still another embodiment of the present invention, and FIG.
The figure is a side view of a card writing device in still another embodiment of the present invention, and FIG. 9 is a plan view of FIG. 8.

Claims (1)

[Claims] 1. In an optical device having an objective lens that transmits light from a subject and a surface that forms an image of the incident light, the surface that forms an image of the incident light receives the image on the surface and converts it into a digital electric It is characterized in that it is composed of an array of photoelectric conversion elements that convert into signals, and a movable optical system that writes information of the electrical signal from the photoelectric conversion elements onto a card medium is connected to the surface made of the array of photoelectric conversion elements. Card media recording camera. 2. The lens of the movable optical system that writes digitized information onto the card medium can be driven with degrees of freedom in two linear directions in a plane parallel to the card medium, and can also be driven in a direction perpendicular to the card surface. Claim 1 characterized by
Card media recording system camera described in section. 3. The card medium recording type camera according to claim 1, wherein the recording method on the card medium is a method in which the number of consecutive signals of 0 or 1 is sequentially determined. 4. A card medium recording camera according to claim 1, wherein the recording signal to the card medium includes an index signal in addition to the normal 0 or 1 signal.