SU1354444A1 - Apparatus for registering pulsed image - Google Patents

Abstract

The invention relates to a TV technique and provides an increase in sensitivity by reducing the background level and internal noise while simultaneously increasing speed by reducing the dead time. The device contains a photosensitive unit 1, a synchronizing generator 2. The shaper 3 is newly introduced delay times, the selector 4 is the last line. 4 il. (L with sob ate 4: 4 4 Phi.1

Description

113544442

The invention relates to the TV-pulse image, to the input of the external TV and STV technique and can be used to start the synchronization generator 2 with-.

used to register random triggering pulse (fig.Za) and

single and pulse images on the output of the frame time counter 9

in TV-based TV systems, the level of logical

lei image signal on the matrix unit, indicating the duration

devices with charge linkage. frame (Fig.36).

The purpose of the invention - the increase in chuv- On the positive front of the pulse

by reducing the Qframe level, the counter 5 times synchronously with

background and internal noise with a simultaneous clock signal (FIG. 8) with a third-rate increase in speed by means of a clock output of a dead-end clock clock. 8 sets up at the first input

Figure 1 shows the structural installation of the photosensitive unit electrical circuit of the device for 151 level of the logical unit (Fig. 3g) of the pulse image registration; allowing the accumulation of non-equilibrium in Fig. 2, the functional diagram of the for-photo charge in the matrix 10, i.e. on the co-ordinator of horizontal sync pulses; the corresponding phase electrodes are shown in Fig. 5 — time diagrams of the accumulation work are supplied to the levels of the dinner device; Fig. 4 shows an example of discrepancy creating under this electrode representation of a pulsed isobody-nonequilibrium state. On the other hand, the accumulation time is proportional to the device that contains a photosensitive set quantity of the tactical unit 1, the synchronous generator 2, the output pulses, and the output of the resolution

 shaper 3 time delays, counter-accumulation time counter 5, indilector 4 of the last row, Synchronous level of logical unit

nerator 2 contains a time counter 5 (fig, 3d), which translates the driver

accumulation, the counter 6 time line, 7 DIB in the operating mode of generation of the stitcher 7 lowercase sync. sync pulses, and, in addition,

pulses (FID), the clock generator 8, the counter 6 of the row time and the frame clock 9. Photosensitive 3 delayed translation times

The body unit 1 contains a matrix 10 in the operating state of the start-up of a device with charge coupling, and a Firmer-Shaper 7 upon the arrival of a signal

1G phase resolution register voltage to the corresponding input

ra, shaper 12 phase voltage -15 synchronously with the first clock pulse of the accumulation section and the output voltage received at its clock

the matrix 13 of matrix 10. input 14, removes the reset signal to the driver 7 lower case pulses of the input reset l simultaneously sets

contains clock input 14, resolution input 15 on the first bus

resolution, the first input is 16 synchronized output resolution sync 2

the outputs, 17-20 start-ups, permissions (fig.Ze, g), respectively. For upsync, synchronization and reset of the correlation by binary counters 23 and

Responsibly, the clock output 21 and the WTO-24 driver 7 use tires

Swarm synchronization input 22, first 23 input 15 resolution and output 18 times and the second 24 binary counters, inversion solutions with time-separated

the torus 25, the first 26 and the second 27 trig signals, which allows to reduce

The erroneousness of a false start from an external device operates as follows by common mode interference. at once. So after installation

In the initial state with no levels of logical units and zero on

VII illumination of the matrix 10, all phase of the input of the 15 resolution and output

the electrodes of the accumulation section and the output-18 of the resolution of the former 7 on the outgoing register 13 are under synchronization potentials and the enrichment clock for the beneficiary 7 binary counters 23 and 24.

Spoons chips. Background charges.: Form a sequence of frequencies

This is due to the thermogenerator — such that the frequency of synchronization in the photosensitive areas. on the corresponding output in

Matrices 10, recombine .. With on the left-n times less than the clock frequency

optical information, i.e. im-f-rj (FIG. 3), arriving at the quarter clock input of the photo sensations of the experimental unit 1. This allows the counting input of the delay time generator 3 to have information about the number of p-phase signal shifts in the photosensitive unit 1, where n is the number of required control phases of the matrix used 10.

The shaper 3 of the delay time forms at its output a signal through k pulses (where, 2,3, ...) of synchronization received at its counting input after setting the enable signal (Fig. 3i). At this time, from the accumulation section of the matrix 10, there occurs a sequential shift of the array of charges into the output register 13, which is in the enrichment mode, which essentially leads to the elimination of rows that are not k + 1. When a signal appears at the output of the imager, 3 delay times (Fig. 3k) the selector 4 of the last row scrolls and blocks the delay generator 3 on the lock input. Synchronously with this signal, the selector 4 of the last line sets at its first output a signal of a logical unit that switches the output register 13 to the information accumulation (reception) mode, as a result of which the level of depletion is established on certain electrodes of the matrix 10. Accordingly, the () line is not reset to the substrate, but is overwritten into the output register 13. However, the signal generated by the selector 4 of the last line on its first output (FIG. 3) sets the second trigger 27 of the former 7 to the initial state, and upon receipt of the next synchronization pulse on the output bus 19 of the synchronization of the former 7, the latter generates a trigger signal at the corresponding output 17 (Fig. 3m) and switches to the automatic blocking mode, stopping the formation of clock and synchronizing signals and Yeni on sootvetstvuk Tsikh outputs. / Return it to the initial generation mode of the horizontal sync signals is possible only when a signal of the logical unit arrives from the first output of the row time counter 6 (FIG. 3N), which appears after the clock pulse ends, the counter 6 corresponding to its format

15

25

thirty

20 gg 45 354444 4

(the number of cells in the output register of the matrix 10).

When the trigger signal arrives at the trigger start input of the counter 6, the logical zero level is set at its first output and the second output resolution bus of the synchronizing generator 2, which switches the photosensitive 10 unit 1 to the line shift mode. The end of the shift is indicated by a short pulse (Fig. Zo) at the second output of counter 6 and, by setting the logical unit at its first output, blocking the output register 13 of the matrix 10 and translating the driver 7 into the working mode of the FID generation. The cycle is repeated.

The frame end is indicated by the frame time counter 9 by resetting the signal at its output to the zero state. The device enters an external start up mode. Thus, only lines with the numbers k + 1, 2 (k + U, ...) are read, which makes it possible to shorten the reading time of charge packets formed in the matrix 10 almost k times, which for smooth (without kinks) images is essentially improves performance without loss of accuracy.

An example of sampling the image contour corresponding to reading every fourth line of the image () is shown in FIG. 4.

Accuracy characteristics and speed of the proposed device can be assessed as follows. Let hf.y be the change (gradient) of the discrete function of the spatial distribution of the radiation intensity of the recorded image in the direction of the row shift (Fig 4), If

40

ui

Vi

,50

55

 y (in,, ,, (1 where ty is the required amplitude resolution of the device as a whole, then according to the Nyquist criterion, 2-4 samples are informative within inequality (1). Upon registration, this allows differentiation of the spatial function by one of axes:. reduce information redundancy from several units to ten times. Differentiation of the spatial function allows the corresponding dead time of the device to be reduced by the expression

 N + f; :( k + i l / (k + i ;, C2)

rf- the number of elements of the line image

 razheni; - number of lines;

- clock frequency of information output; clock frequency line shift

in the accumulation section. .

By dead time is meant

the time interval during which Q is connected with the corresponding clock device is not capable of receiving input (optical) information without errors. Reducing the dead time by a factor of k allows you to respectively increase the speed of the device, determined by the number of measurements over a fixed period of time, and also increase the sensitivity and resolution of the device by reducing the background value and the fixed geometric noise caused by thermal and parasitic generation matrix 10. The value of the corresponding charge is directly proportional to the frame time, + Tn, where TC is the accumulation time, which, when decreasing T by K times, allows the photo inputs of unit on the CCD, the output of the installation is connected to the first input of the photosensitive unit on the CCD,

.g the first and second resolution outputs are connected respectively to the first and second resolution inputs of the photosensitive unit on the CCD, the external trigger input is the external trigger input of the device, and the output of the photosensitive block on the CCD is a device output sensitivity increase

25 by lowering the background level and internal noise while increasing speed by decreasing merg

20

rd electron

to expand the dynamic range of approximately your time, the shaper was introduced K times, since the normalized noise-delay time and the last charge selector Qiu / e, due to the Q-line fluctuations, moreover, in the synchronization parameters, background intensity, Qy, / e / Q77e where e is the synchronous generator connected to the second

the installation input of the photosensitive unit on the CCD matrix and with the first output of the last row selector, the reset input of which is connected to the reset output of the synchro-generator, and the installation input - with the output of the delay time generator, the enable input of the form. Thus, the device allows to improve the sensitivity, resolution, respectively, to expand the dynamic range by reducing the background level and internal noise, to increase the speed by

time delay switch connected

reducing the dead time of the device with the third synchronization resolution output while maintaining the requirements for the generator, the counting input with the spatial resolution when registering the distributed pulse images.

synchronization of the synchronous generator, and the lock input - with the second output of the last row selector.

1354444

Formula

shade invented

A device for registering a pulse image containing a photosensitive block on a matrix of charge-coupled devices (CCD) and a synchronous generator, the first, second, third and fourth clock outputs of which

connected to the corresponding clock inputs of the photosensitive unit on the CCD, the output of the installation is connected to the first input of the installation of the photosensitive unit on the CCD,

The first and second resolution outputs are connected respectively to the first and second resolution inputs of the photosensitive unit on the CCD, the external trigger input is the external trigger input of the device, and the output of the photosensitive block on the CCD is an output device that

by reducing the background level and internal noise while improving speed by reducing the merg

time delay switch connected

with the third output of the sync generator resolution, the counting input - from the output

synchronization of the synchronous generator, and the lock input - with the second output of the last row selector.

27

Phi.

Editor N. Tupitsa

Compiled by G.Rosatkevich

Tehred I.Popovich Proofreader S.Cherni

Order 5716/56 Circulation 636 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Claim Device for recording a pulse image containing a photosensitive unit on a charge-coupled device (CCD) array and a sync generator, the first, second, third and fourth clock outputs of which are connected to the corresponding clock inputs of a photosensitive unit on a CCD, the output of the unit is connected to the first input of the installation a photosensitive block on the CCD, the first and second resolution outputs are connected respectively to the first and second resolution inputs. a photosensitive block on the CCD, the input to The external trigger is the input of the external trigger of the device ^ and the output of the photosensitive unit on the CCD is the output of the device, characterized in that, in order to increase sensitivity by lowering the background level and internal noise while increasing speed by reducing dead time, a delay time driver is introduced and selector of the last line, and the input is sync. the clock generator is connected to the second input of the installation of the photosensitive block on the CCD matrix and to the first output of the last row selector, the reset input of which is connected to the reset output of the sync generator, and the installation input is connected to the output of the delay time driver, the resolution input of the delay time generator is connected to the third output of the sync generator resolution, the counting input - with the synchronization output of the clock generator, and the blocking input - with the second output of the last row selector. EE <ч chi "" ** "si d U K / I N N ABOUT FIG. 3 Compiled by G. Rosatkevich Editor N. Tupitsa Tehred I.Popovich Corrector S. Cherni Order 5716/56 Circulation 636 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and printing company, Uzhhorod, st. Project, 4