RU63599U1 - PERSONNEL ELECTRON-OPTICAL RECORDER OF PULSE LIGHT RADIATION - Google Patents

Abstract

The proposed utility model relates to measuring technique, and is a device that provides personnel registration of pulsed light radiation with the output of the registered image to a computer equipped with software that allows processing of the registered image and programmatically control the operating modes of the device. The technical result of the proposed frame electron-optical recorder of pulsed light radiation is to expand the dynamic range by matching the gain of the image intensifier and the accumulation time of the CCD sensor. The essence of this proposal is to use an information light signal that regulates the gain of the image intensifier tube and the accumulation time of the CCD matrix, without losing the spatial resolution of the registrar. The adjustment of the same parameters in the prototype device is carried out according to the output signal from the reader, which does not allow working in the registration mode of a single light pulse. The technical result in a frame electron-optical recorder of pulsed light radiation containing an EO-gate, the control input of the image intensifier tube of which is connected to the output of the shaper of the frame duration, the controller, the reading unit, consisting of interconnected control unit and the CCD matrix, mechanically interfaced with the screen of the image intensifier unit, block control is interconnected with the controller and the visualization computer, the start-up unit is achieved by the fact that the detector of light radiation and analogue Frova converter (ADC), the photosensitive detector and the image intensifier inputs are optically connected with a recorded pulse light emission, the ADC output controller connected to the input, the output of which is connected to the control input of the frame duration, the output start unit connected to the control input of the controller. Fig. 3 l.

Description

The proposed utility model relates to measuring technique, and is a device that provides personnel registration of pulsed light radiation with the output of the registered image to a computer equipped with software that allows processing of the registered image and programmatically control the operating modes of the device.

The registrar can be used to determine the spatial distribution of pulsed light radiation arising from physical studies of ionizing radiation. In studies of the spatial and temporal structure of light radiation, the important parameters of the recorder are spatial resolution, threshold sensitivity, and dynamic range. The expansion of the dynamic range is the subject of this proposal.

Digital recorders of pulsed light radiation, made on a CCD, are known from patents for utility model No. 54478, 55523 (1, developed by the applicant - FSUE NIIIT).

Known multi-channel chronographic recorder of single pulses of ionizing radiation (2, US Pat. RF 1294123 - development of FSUE NIIIT) containing an electron-optical converter (EOP), the screen of which is optically coupled to a matrix of charge-coupled devices (CCD). The technical result of the device (2) is to increase the speed of reading information from a CCD matrix.

Known Japanese patent No. 2280576 from 11.16.1990, H04N 5/225,

H04N 04/335, Applicant Hamamatsu Photonics KK "High speed frame shot camera" (3) describing a high-speed camera device that has a short frame duration. The camera includes a control device, four channels, each of which contains: an electron-optical converter with a microchannel plate (MCP), connected by means of fiber-optic interface with a CCD, a gate pulse generator, a video recorder, an input

a lens, an optical splitter that provides uniform division of the input light flux and its projection onto the photocathode of the image intensifier tube located in each channel. The camera allows you to register a large number of image frames at high speed, which is not the task of the proposed technical solution.

Known US patent (4) No. 5,694,203 dated 02/12/1997, H04N 007/00, H04N 005/323, the applicant Kabushikikaisha Wacom "Distance camera device having light gate extracting distance information" describing a remote camera having a light shutter for recording remote information . The patent describes an image intensifier tube coupled to a CCD camera and providing reproduction of an image of a distant object by recording reflected optical radiation, which is also not the task of the proposed technical solution.

Known Japanese patent (5) JP 20000157025, EP 1306652 dated 05/02/2003, G01J 1/42, H04N 5/32, the applicant Hamamatsu Photonics KK "Streak camera apparatus" describing a chronographic camera device. In solution (5), CCD noise was partially reduced only by reducing noise arising during line-to-line charge transfer.

The closest technical solution to this proposal is a frame-based electron-optical recorder of pulsed light radiation, containing an EO shutter, consisting of an image intensifier tube, a control input of which is connected to a frame shaper, a controller, a readout unit, consisting of a CCD matrix mechanically coupled through a fiber optic with the screen of the image intensifier tube and the control unit, the control inputs of the controller and the CCD matrix are connected to the corresponding outputs of the control unit, the information output of which is connected to the visa computer Ualiza, the launch unit according to US Pat. (6) U.S. Pat. No. 5,872,595 dated February 16, 1999, H04N 005/225, H04N 005/238, Applicant Monahan, John F. "Methods and apparatus for providing wide range exposure control for image intensifier cameras".

The dynamic range of the frame electron-optical camera is expanded by using an automatic exposure control system that generates three control signals: the first control signal controls the gain of the electron-optical converter itself (MCP power supply), the second control signal provides selective gating of the electron-optical converter, and the third signal adjusts the attenuation coefficient of the input light passing through the lens. The automatic exposure control system contemplated by the invention is 10 times

controlled range. The system makes it possible to measure exposure for the image intensifier or CCD in comparison with the exposure that is set by installation. The measurements taken include measuring the average and peak values, the weight function, and then the logical automatic exposure control is set up in the following order: the gain of the electron-optical image converter, the function of the shutter pulse duration and the attenuation coefficient of the light attenuator, providing the system as a whole to strictly increase or a changing light flux from the object of observation. The patent describes the implementation of the process of controlling the parameters of an electron-optical camera by using the properties of the MCP. Solution (6) is applicable for continuously incoming light radiation.

The technical result of the proposed frame electron-optical recorder of pulsed light radiation is to expand the dynamic range by matching the gain of the image intensifier and the accumulation time of the CCD sensor.

The technical result in a frame-based electron-optical recorder of pulsed light radiation containing an EO-gate, the control input of the image intensifier tube of which is connected to the output of the driver of the frame duration, the controller, the reading unit, consisting of interconnected control unit and the CCD matrix, mechanically interfaced with the screen of the image intensifier unit, block the control is interconnected with the controller and with the visualization computer, the start-up unit is achieved by the fact that the detector of light radiation and analog a digital converter (ADC), the photosensitive inputs of the detector and the image intensifier tube being optically coupled to the detected pulsed light radiation, the ADC output is connected to the controller input, the output of which is connected to the control input of the frame duration driver, the output of the trigger unit is connected to the control input of the controller.

The essence of this proposal is to use an information light signal that regulates the gain of the image intensifier tube and the accumulation time of the CCD matrix, without losing the spatial resolution of the registrar. The adjustment of the same parameters in the prototype device is performed according to the output signal from the reader, which does not allow working in the registration mode of a single light pulse.

The block diagram of the proposed utility model is presented in Fig. 1, Fig. 2 shows a block diagram of the controller 7, Fig. 3 shows timing diagrams. Thin lines in Fig. 1 and Fig. 2 indicate single communications, and thick - group - highways .

The accepted notation in Fig. 1: lens 1, detector 2, image intensifier 3, frame shaper 4, ADC 5, CCD matrix 6, controller 7, control unit 8, imaging computer 9, launch unit 10, EO shutter, consisting of The image intensifier tube 3 and the shaper of the frame duration 4 is indicated by 11, the reading unit, consisting of a CCD matrix 6 and the control unit 8, is indicated by 12.

As an electron-optical converter 3, a Bozon M type tube with an integrated microchannel plate of VNIIEP is used. The frame duration shaper 4 contains a high-voltage power source controlled by a low-voltage analog signal, implemented on the Brandenburg 590-224 / 409 series circuits, a digital-to-analog converter - DAC, implemented on AD 9748 microchips from Analog Devises, and an IGBT-based gate pulse generator - transistors from International Rectifier.

The signal from the output of the shaper 4 duration controls the parameters of the image intensifier tube (gain, start delay and frame duration).

The CCD matrix 6 is made on the ISD017APF chip NPP Electron-Optronic Control unit 8 is a logic device implemented on the FPGA from ALTERA EPM7512BTC144-7. The charge transfer control circuits in sections and registers of the CCD matrix are based on electronic keys of the EL7457CS and EL7156CS type by Elantec., MAX312CSE (maxim), level formation microcircuits MAX1659ESA (MAXIM), MC79L05ACD (ON SEMICONDUCTOR), LP2951ACM (NATIONAL SEMICONON

The controller 7 represents a logical device (figure 2), implemented specifically for the inventive registrar. Its functions and specific implementation differ from the prototype device controller. The controller 7 consists of decoders 13, 14, registers 15, 16, a start delay driver 17, an end-of-frame pulse generator 18. The decoders 13 and 14, registers 15 and 16 are made on FPGAs of the EPM7064BLCLU-3 type from Altera. The block delay delay 17 and the block forming the end of the frame 18 are made on the FPGA company Altera together with

"Fast" delay lines - cables with certain characteristics and with high-speed transistor cascades - emitter followers.

The trigger unit 10 represents a threshold device implemented on transistors 2T363, 2T913 and high-frequency pulse transformers.

Detector 2 is a photodetector with a linear transition function of the input radiation, for example, type SDF14 or SDF15 manufactured by FSUE IIIT.

Frame electron-optical registrar of pulsed light radiation operates as follows.

The pulsed light radiation through the lens 1 (for example, of the Jupiter-9 type) enters the screen of the image intensifier tube 3, contacted with the CCD matrix 6. The control unit 8 provides for reading the image from the CCD of the matrix 6 and controls the controller 7, which sets the parameters of the electron-optical converter 3 - frame duration and start delay.

Detector 2 converts light radiation into an analog signal, which is fed to the ADC 5. Detector 2 and ADC 5 operate in a continuous mode, constantly giving out information about the input light exposure.

With the advent of the start pulse (figure 3A) from the start block 10 turns on the start delay generating unit 17, which after a predetermined interval _of time T generates the driving pulse (Figure 3B). This impulse:

- enters the register 15 and fixes in it the values of the accumulation time code of the CCD matrix 6 (3D diagram);

- enters the register 16 and fixes in it a code value that determines the gain of the image intensifier when it is opened (diagram 3E);

- enters the shaper 4 of the duration of the frames, which begins the formation of the gate pulse;

- arrives at the control unit 8 and sets the CCD-matrix 6 in the accumulation mode with the value of T _n recorded in register 15 (diagram 3G);

- arrives at the block forming the pulse 18 of the end of the frame, which begins the countdown of the duration of the frame of the image intensifier tube 3.

Upon completion of the duration of the interval of the frame T _{to the} block forming the pulse of the end of the frame 18 generates a control pulse (diagram 3B), arriving at the block forming the duration of the frame 4, which on this pulse completes the formation of the gate pulse of the image intensifier.

At the end of the accumulation time interval T _n, the reading unit 12 switches to the output mode of the registered information (diagram 3G) in block 9.

Thus, the use of the proposed technical solution allows you to adjust the gain of the EO-shutter from 1 to 10 ³ , the accumulation time of the CCD matrix from 10 ^-5 to 1 sec, which provides an extension of the dynamic range of registration ~ 10 ² times.

LITERATURE

1. Patents of the Russian Federation FSUE NIIIT No. 55478, 55523.

2. Patent of the Russian Federation FSUE NIIIT No. 1294123

3. Japanese patent by Hamamatsu Photonics KK No. JP 2280576 dated November 16, 1990, H04N 5/225, H04N 04/335

4. US patent of the company Kabushikikaisha Wacom No. 5,694,203 dated 02/12/1997, H04N 007/00, H04N 005/323

5. Japan patent of Hamamatsu Photonics KK No. 20000157025, EP 1306652 dated 05/02/2003, G01J 1/42, H04N 5/32

6. US Patent, Applicant Monahan. John F. No. 5,872,595 of February 16, 1999, H04N 005/225, H04N 005/238 - prototype

Claims (1)

A frame electron-optical registrar of pulsed light radiation, containing an electron-optical shutter (EO-shutter), the control input of an electron-optical converter (EOP) of which is connected to the output of the shaper of the frame duration, the controller, the reading unit, consisting of interconnected control unit and CCD matrix mechanically coupled to the screen of the image intensifier tube, the control unit is interconnected with the controller and the visualization computer, the start-up unit, characterized in that the recorder is connected in series light detector and analog-to-digital converter (ADC), moreover, the photosensitive inputs of the detector and image intensifier tubes are optically connected with the detected pulsed light radiation, the ADC output is connected to the inputs of the controller, the output of which is connected to the control input of the frame duration driver, the output of the trigger unit is connected to the control controller input.