JPH0328112B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-resolution imaging device, and in particular, by outputting imaging signals for multiple horizontal scanning lines in parallel, it is possible to reduce the horizontal scanning frequency without changing the vertical scanning frequency. The present invention relates to a high-resolution imaging device designed to cover a wide range of areas.

In general, television cameras output one horizontal scanning line worth of imaging signals dot-sequentially or line-sequentially every horizontal scanning period (1H), so when performing high-resolution imaging, the imaging output signal I had no choice but to widen the bandwidth. In addition, in magnetic recording and reproducing devices such as video tape recorders that magnetically record and reproduce video signals, it is generally difficult to widen the operating band due to the frequency response characteristics of magnetic heads, rotary transformers, etc. resolution video signals cannot be handled directly.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a high-resolution imaging device that outputs high-resolution imaging signals that are easy to handle in various video systems such as video tape recorders. Therefore, the gist of the present invention is to provide a plurality of channel readout means for simultaneously reading out image pickup signals for a plurality of horizontal scanning lines from an imaging section in parallel, and to obtain an image whose time axis is expanded in the horizontal direction from each channel of the plurality of channel readout means. A high-resolution imaging device is characterized in that it obtains a signal.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing one embodiment.

In the first embodiment shown in FIG. 1, a pair of comb-like electrodes 1A and 1B are attached to a photoelectric conversion surface (not shown) as signal extraction electrodes, and two electron guns 2
By scanning the horizontal electrode portions 1a and 1b of each electrode 1A and 1B with the electron beams B _A and B _B from A and 2B, imaging signals for two horizontal scanning lines are transmitted to the vertical electrodes of each electrode 1A and 1B. The device is equipped with an imaging section 10 which is taken out through sections 1ac and 1bc, and two-channel imaging signals outputted from the imaging section 10 are outputted from buffer amplifiers 11A and 11B via process circuits 12A and 12B, respectively. It is. The pair of comb-shaped electrodes 1A and 1B of the imaging section 10 are arranged such that each horizontal electrode part 1a and 1b corresponds to a horizontal scanning line and is alternately arranged in the vertical direction. The pair of comb-shaped electrodes 1A, 1B are arranged so that the adjacent horizontal electrodes 1a, 1b are connected to the electron beams B _A , 2B from the two electron guns 2A, 2B.
B Scanned simultaneously in the horizontal direction by _B. That is, the imaging section 10 outputs imaging signals for two adjacent horizontal scanning lines every one horizontal scanning period (1H).

In the imaging device of this embodiment, beam scanning was performed using an electron beam from one electron gun so as to sequentially obtain imaging signals for one horizontal scanning line from the signal extraction electrode every horizontal scanning period. Compared to general imaging devices, beam scanning is performed with the horizontal scanning frequency reduced to 1/2 without changing the vertical scanning frequency, resulting in two-channel imaging with each time axis doubled. Get a signal. The time axes of the imaging signals of the above two channels have been expanded by twice, so the frequency band is different from the frequency band when each time axis is compressed to 1/2 and returned to the normal time axis. It will be narrowed down to 1/2.

In the first embodiment described above, the imaging section 10 has a two-beam scanning structure using the two electron guns 2A and 2B, but as shown in FIG. , , 1b may be used to scan the respective horizontal electrode sections 1a and 1b at the same time. Note that other components in this second embodiment are the same as those in the first embodiment described above.
Since this is the same as the embodiment shown in FIG.

Next, a third embodiment shown in FIG. 3 is an application of the present invention to a solid-state imaging device. In this embodiment, an imaging section 20 having a CCD (Charge Coupled Device) structure receives light corresponding to each pixel. 21, a vertical transfer register 22 that vertically transfers the signal charges obtained in the light receiving section 21, and two horizontal transfer registers 23A that horizontally transfer and output the signal charges transferred via the vertical transfer register 22, respectively. , 23B. The above vertical transfer register 22
is provided for each vertical line of each light receiving section 21, and captures each signal charge obtained at each light receiving section 21 during the vertical blanking period of each vertical scanning period (1V), and then captures each signal charge obtained in each light receiving section 21 during one horizontal scanning period. Two horizontal scanning lines worth of signal charges are vertically transferred every 1H. The two horizontal transfer registers 23A and 23B simultaneously horizontally transfer the signal charges for one horizontal scanning line transferred via the vertical transfer register 22 during the 1H period, thereby capturing images of two channels. Output a signal.

The two-channel imaging signals output from the imaging device of each embodiment as described above each have two time axes.
Since it has been expanded twice, each time axis is halved.
The frequency band is 1/2 of the frequency band when compressed to the normal time axis and returned to the regular time axis. For example, if each has a bandwidth of 4MHz,
As shown in FIG. 4, each channel is converted into an FM signal by FM modulators 31A and 31B, and sent from recording amplifiers 32A and 32B to a magnetic head 33.
By recording on the magnetic tape 34 via A and 33B, it is possible to substantially record and reproduce image information with a bandwidth of 8 MHz using a video tape recorder with an operating bandwidth of 4 MHz. In each of the above-described embodiments, two channels of imaging signals are output simultaneously, but it goes without saying that the output is not limited to two channels, and that many more channels of imaging signals may be output. do not have.

As is clear from the description of the above embodiments, according to the present invention, the imaging signals for a plurality of horizontal scanning lines whose time axis is expanded in the horizontal direction are obtained, so that the imaging signal of each channel is Since the frequency band is narrowed by the amount of expansion, it is possible to handle high-resolution video signals without widening the operating bands of various video systems, and the intended purpose can be fully achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram showing a first embodiment of an imaging device according to the present invention, and FIG.
FIG. 3 is a block diagram showing an embodiment of the invention.
FIG. 3 is a schematic plan view showing the configuration of main parts of the imaging section of the embodiment. FIG. 4 is a block diagram showing a recording system circuit of a video tape recorder that handles two-channel imaging signals output from the imaging apparatus of each of the embodiments described above. 10, 10', 20...Imaging unit, 1A, 1B...Comb tooth electrode for signal extraction, 2A, 2B, 2...Electron gun, 21...Light receiving unit, 22...Vertical transfer register, 2
3A, 23B...Horizontal transfer register.

Claims (1)

[Claims] 1. A plurality of channel reading means is provided for simultaneously reading out imaging signals for a plurality of horizontal scanning lines from the imaging section in parallel, and an imaging signal whose time axis is expanded in the horizontal direction is obtained from each channel of the plurality of channel reading means. Features: High-resolution imaging device.