JPS5913476A - Image pickup mechanism - Google Patents

Abstract

PURPOSE:To obtain a static picture with high resolution, by changing an image formation surface optically by a half pitch of a photoelectric conversion picture element composing the images of a subject formed before and after. CONSTITUTION:A means to displace a reflection mirror M has similar constitution to the oscillation means of a speaker; a voice coil wound around a cylinder body 4 is arranged in a gap between a center pole 2 abutted to the magnetic pole of a magnet 1 and a yoke 3 which are opposed each other and a dumper 8 is inserted between an oscillation plate 6 supporting the cylinder body 4 and a supporting plate 7 supporting the reflection mirror M. Consequently, the reflection mirror M is vertically moved in accordance with the current level flowing into the voice coil 5. The figure shows a known CCD image pickup plate to compose a video signal of one field by composing image pickup outputs corresponding to two positions of the mirror, transfer the photoelectric conversion output of the image pickup surface D1 to a storage part D2 in each field during the vertical retrace and lead out the image pickup output successively from the storage part D2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an imaging mechanism (
Two matters.

The imaging means C2 includes an image pickup tube and a solid-state resolution element, and the latter has advantages over the former ζ2, such as being more compact and free of afterimages due to image burning. However, in this solid-state imaging device, the imaging surface is formed of photoelectric conversion pixels.

The resolution is limited by the formation density C2 of photoelectric conversion pixels. Note that there are two types of resolution: vertical resolution and water resolution, but vertical resolution (2) is limited by the number of horizontal scanning lines, and it is the horizontal resolution that is relatively problematic. In order to improve the resolution, various studies have been conducted to increase the density of the electrical conversion pixels in the horizontal direction (higher density), but increasing the density not only involves manufacturing difficulties but also increases costs. The result was an increase in volume.

Therefore, it is desirable to have an imaging mechanism that allows the formation density of photoelectric conversion pixels to remain the same (only the same imaging degree as above).One method is to change the light receiving position of the photoelectric conversion pixels to two positions
: Displacement and image output before and after displacement! It is conceivable to double the information density of the imaging output obtained by combining ζ2. Specific 1: Optical method (method of displacing two imaging planes, method of displacing a mask that blocks light by dividing each photoelectric conversion pixel into two, and method of displacing the image sensor itself)
There are many possible types. If the displacement direction is horizontal, the horizontal resolution will be the same as above, and if it is the vertical direction, the vertical resolution I'Z will be the same as above, and a resolution higher than the pixel column or pixel row can be obtained.

The present invention has been made in view of the above-mentioned points, and it optically displaces the imaging plane by half a pip of the photoelectric conversion pixel, and synthesizes the subject images before and after the displacement to create a high-resolution still image 2.
This paper proposes a new and effective imaging mechanism.

Hereinafter, regarding the operating principle of the present invention, as shown in Figs. .The occupation ratio of the photoelectric conversion pixel and the gap in the horizontal direction (2) is approximately 7:6. Therefore, from the state shown in Figure 1, (B) (-
As shown in FIG. Although the partial light-receiving areas overlap, light is received from different positions of the subject.The above explanation is an example in which the solid-state image sensor is displaced for convenience, but the relationship between the imaging plane and the solid-state I-most extended element is relative. Therefore, it is easy to see that the same result will be obtained even if the captured image is displaced by P/'> (211).

Therefore, in this embodiment, as shown in FIG.
A reflecting mirror that sums the optical path of the incident light that has passed through Ll at a right angle C2 (a reflection mirror that moves forward and backward in the direct firing direction (2 pixel pitch <zJ"E)-' in the opposite direction, and the reflected light forms an image The captured image (Dl) on the element tDl is displaced by its pixel row (=orthogonal horizontal direction C:li!1i pixel row %bit), and the image pickup outputs before and after the displacement (=1 field are synthesized) Still images of χ are recorded magnetically.

The means for displacing the above-mentioned reflecting mirror ((4) is the fourth
As shown in the figure, the vibration structure of the speaker (two similar configurations), the magnetic poles of the magnet fi+ (two abutting center poles (2) and yokes (3), with seven turns of a cylinder (4) placed between the same gap). A rotated voice coil (5) is arranged, a diaphragm (6) supporting the cylinder (4) and a support plate (7) supporting the reflecting mirror (MJv) are arranged.
Therefore, the reflecting mirror (4) moves downward depending on the level of the stream flowing to the voice coil (5).

FIG. 5 shows the imaging output synthesis circuit of this embodiment.

In this embodiment, one field of video signal is synthesized by combining image pickup outputs corresponding to two positions of a mirror.
The adopted image sensor is a well-known OO that transfers the photoelectric conversion output of the imaged image (DI) to the storage section (D2) in the hand retrace period in units of fields, and sequentially derives the imaging output from this storage section.
D is the imaging slope.

First, when a recording command is issued, the first
During the second field (F2) imaging period following the field (Fl), the mirror is displaced from the first position to the second position.Therefore, the imaging output of @1 field (Fl) is mirror ( The first image output at the first position (2) of Ml, and the imaging output of the second field (F2) is
This is the imaging output while moving, and the imaging output of the third field (F3) is the imaging output at the second position (2). Therefore, the 181 changeover switch (EIWI)
1) and the third field (F!!) are selected, and the other 41 image outputs including the false 2nd field (F2) are disabled (grounded). Selected first field (
The imaging output of Fl) is controlled by the second changeover switch (SW2) (
Two delay circuits (9) (two people are powered. This delay circuit (9)
) is composed of a COD analog delay line, and its delay amount is determined in two fields (two branches), and the delay output is the same as the fifth field j1^ image output (:). Therefore, the sixth field (F3) 4] "The image output is supplied to a line different from the delay circuit by a second (9) changeover switch (SW2). When the imaging output of the 6th field (F5) is derived, The third switch (sws) is
The first field (Fl) (which is the branched image output >F14
and the non-delayed output which is the imaging output of the 6th field (F5)! Alternately (-switches at high speed, doubles the information density (=synthesis ratio) to the next stage signal processing circuit (+0), inputs the derived luminance signal γ) and color difference signal (
RY)CB-Y) is also derived by doubling the information density. Figure 6 shows each changeover switch (SWI) (SW2) (
SWg) switching control input waveform! show. This waveform is used for explanation purposes only.Example C2 explains the case of recording 1 u: lti...J, but if the above-mentioned operation including the displacement of the reflection mirror is continued, a still image can be recorded in 6 frames. 1rd g21
It is also possible to form it one time at a time.

According to this embodiment described above, the horizontal resolution of the obtained image can be doubled.
: By displacing the pixels, just by arranging one and a half pixel rows for one field, a resolution equivalent to the presence of pixel rows for one field can be obtained. In addition, in this example, one reflective mirror
Due to the displacement of , the imaging plane moves away from the imaging plane by the amount of pixel % pitch, causing the focus to go out of focus, but the focal length adjustment by the pixel % pitch is too small and difficult to adjust, so there is no problem in use. Therefore, according to the present invention, the resolution in the direction of displacement can be increased simply by displacing the reflecting mirror (-therefore, displacing the imaging plane), and the effect is great.

[Brief explanation of drawings]

FIG. 11 and the second prisoner are resolution diagrams illustrating the same principle as above of the present invention,
Figure 6 is a schematic explanatory diagram of the purchase of the present invention, and Figure 4 is an embodiment of the present invention.
Fig. 5 shows a circuit block diagram for image pickup output synthesis. Figure 1 Figure 2 Figure 3 Figure 4 Figure 1 Procedure Amendment

【method】

November 72, 1980, Commissioner of the Japan Patent Office 1, Indication of the case, Patent Application No. 122592, 1982, 2, Title of the invention: Imaging mechanism 6, Person making the amendment Patent applicant Address: 2-chome, Keihan Hondori, Moriguchi City 18 Name (188) Sanyo Electric Co., Ltd. Representative Kaoru Iue 4, Agent address 2-18-6 Keihan Hondori, Moriguchi City Amend the 4th line of the 8th day of the statement of contents as shown in F. The block diagram and FIG. 6 each show a switching waveform diagram for explaining the switching operation of FIG. 5. "that's all

Claims (1)

[Claims] (1) A solid-state image sensor that forms an image sensor with a photoelectric conversion pixel; a reflecting mirror that changes the optical path between the video camera lens and the solid-state image sensor; means for displacing the imaging plane of the object on the imaging plane C by half the formation pitch of the photoelectric conversion pixels; and means for synthesizing the imaging output before and after the displacement (in the two positions), respectively The displacement direction of the imaging plane (-) is an imaging mechanism that increases the resolution.