CN205249332U - CCD camera shutter of liquid crystal light valve formula - Google Patents
CCD camera shutter of liquid crystal light valve formula Download PDFInfo
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- CN205249332U CN205249332U CN201520983978.4U CN201520983978U CN205249332U CN 205249332 U CN205249332 U CN 205249332U CN 201520983978 U CN201520983978 U CN 201520983978U CN 205249332 U CN205249332 U CN 205249332U
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- liquid crystal
- light valve
- crystal light
- ccd camera
- shutter
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Abstract
CCD camera shutter of liquid crystal light valve formula sets up liquid crystal light valve on CCD camera body, its characterized in that is equipped with liquid crystal light valve control panel and PC (computer) on CCD camera body, wherein, the serial ports of liquid crystal light valve control panel with the serial ports of PC is connected and carries out liquid crystal light valve (shutter) control, the USB interface of PC is connected with the USB interface of CCD camera and carries out image data collection, gate trigger port on the liquid crystal light valve control panel is fast is connected with CCD camera shutter signal port, the delivery outlet of liquid crystal light valve control panel with liquid crystal light valve is connected. The utility model discloses overall structure reasonable in design is practical, thinks about ingenious novelty, install simple and conveniently, and the cost is very low, through the regulation can effective control light transmission amount, the effect of opening the shutter. The utility model discloses the shutter life -span prolongs greatly, can reach more than tens of times of traditional shutter life -span.
Description
Technical field
The utility model relates to a kind of camera shutter, be specifically related to the shutter of a kind of liquid crystal light valve formula in Scientific Grade CCD Camera that astronomical observation uses, thisly replace traditional mechanical shutter to carry out the scheme of light exposure control with liquid crystal shutter, can improve shutter response, reduce shutter effect and increase the service life, realize stroboscopic shutter and dim light shutter function simultaneously.
Background technology
At present, CCD camera is topmost astronomical observation equipment, and the Scientific Grade full frame CCD camera using in scope is all to use mechanical shutter, mechanical door curtain is arranged on to CCD chip front end and stops light, control the sensitization time of integration of CCD chip, being reflected on image is exactly the power of signal. Due to the existence of mechanical devices, the shutter life-span is subject to great restriction, and in the application of frequent folding, mechanical shutter is a device that consumption is exceedingly fast, and price is higher, finds a novel equipment replacement mechanical shutter and has considerable realistic meaning.
Summary of the invention
The utility model is for prior art above shortcomings, and it is to realize the phase delay to light by the refractive index of Control of Voltage liquid crystal molecule that a kind of liquid crystal light valve is provided, and then controls logical light quantity. The present invention is the effect that the voltage by controlling liquid crystal light valve is realized shutter, and exposure effect and mechanical shutter are suitable, but the shutter life-span extends greatly.
The purpose of this utility model is to be achieved through the following technical solutions:
The CCD camera shutter of liquid crystal light valve formula arranges liquid crystal light valve on CCD camera body, it is characterized in that, is also provided with liquid crystal light valve control panel and PC on CCD camera body; Wherein, the serial ports of described liquid crystal light valve control panel and the serial ports of described PC are connected ... carrying out liquid crystal light valve (shutter) controls; The USB interface of described PC is connected and carries out image data acquiring with the USB interface of CCD camera; Door on described liquid crystal light valve control panel is fast triggers port and is connected with CCD camera shutter signal port; The delivery outlet of described liquid crystal light valve control panel is connected with described liquid crystal light valve.
Described liquid crystal light valve control panel adopts chip SP3232 to carry out serial line interface communication, adopts chip 7805 to carry out power supply voltage stabilizing power supply, adopts chip LT1084-3.3 that 3.3V power supply is provided, and adopts chip STC89LE516RD+ as master controller.
More specifically and more optimally say, the particular circuit configurations of described liquid crystal light valve control panel is as follows, referring to Fig. 4:
Power supply aspect, selects 7805 chips to carry out voltage stabilizing adjusting, and output+5V voltage is given SP3232 communication chip, the power supply of LT1084-3.3 power supply chip. Select LT1084-3.3 chip to carry out voltage stabilizing adjusting, output+3.3V voltage, powers to STC89LE516RD+ as master controller.
Communication aspects:
Communication chip adopts SP3232, data communicate by asynchronous serial bus and PC, adopt SP3232 to complete single-chip microcomputer Transistor-Transistor Logic level (be defined as+5V of high level, low level is defined as 0V) to PC RS-232 level conversion (be defined as-12V of high level, be defined as+12V of low level).
Controller:
Master controller adopts the STC89LE516RD+ chip of macrocrystalline science and technology, and its operating frequency range is 0 ~ 80MHz, the FLASH of 64K, and internal RAM size is 1280 bytes, and self is with watchdog circuit. Master control Zhu device is accepted unlatching, time for exposure and the shutdown command that PC sends by serial ports, these orders send according to the form of oneself definition, command format is: command format: (55 is communication inspection to 55wwxxyyzz, ww represents the Time Calculation amount that liquid crystal light valve is opened, xx represents the voltage amplitude amount of calculation of opening, yy represents the Time Calculation amount that liquid crystal light valve cuts out, and zz represents the voltage amplitude amount of calculation of closing). Master controller receives the state of the rear IO of change of these orders mouth, controls voltage and time that light valve is opened, thereby plays the effect of shutter.
The utility model beneficial effect: overall construction design is reasonable and practical, the novelty that is skillfully constructed, installs simple and conveniently, and cost is very low, can effectively control logical light quantity, the effect of opening shutter by regulating. The utility model shutter life-span extends greatly, more than can reaching the decades of times in traditional shutter life-span.
Brief description of the drawings
Fig. 1 is the utility model liquid crystal light valve and camera structure schematic diagram;
Fig. 2 is the utility model liquid crystal light valve and camera connection diagram;
Fig. 3 is that MaxIm software arranges delivery outlet figure;
Fig. 4 is the utility model physical circuit figure; Adopt SP3232 to carry out serial line interface communication, adopt 7805 to carry out power supply voltage stabilizing power supply, adopt LT1084-3.3 that 3.3V power supply is provided, adopt STC89LE516RD+ as master controller.
Fig. 5 is for being the utility model liquid crystal light valve outward appearance.
Detailed description of the invention
Embodiment 1, the CCD camera shutter of liquid crystal light valve formula, with reference to Fig. 1: CCD camera body 1, liquid crystal light valve 2. In Fig. 2: CCD camera power supply 3, CCD fan 4, CCD camera USB interface 5, CCD camera shutter signal port 6, PC USB interface 7(is connected with 5), liquid crystal light valve control panel shutter triggers port 8(and is connected with 6), PC serial ports 9, liquid crystal light valve control panel serial ports 10(is connected with 9), liquid crystal light valve control panel delivery outlet 11(is connected with 2).
The operation principle of liquid crystal shutter is as follows: gather after the image setting time for exposure, detect exposure triggering signal since 6. On outside liquid crystal circuit control panel, adopt STC89LE516RD+ single-chip microcomputer to detect exposure and start triggering signal, and programming Control single-chip microcomputer output voltage removes to drive the switch of a liquid crystal light valve. The length of the low and high level of this output can programming Control, is sent order and regulated the length of low and high level by serial ports. The actual liquid crystal light valve using when drive level be low be that light valve is opened, liquid crystal printing opacity opens shutter, drive level is that height is that light valve is closed, the light tight shutter of closing of liquid crystal.
CCD camera method to set up is as follows:
According to the CCD(U.S. U6CCD of Apogee company camera) setting of dispatching from the factory, adopt MaxIm software that the P2 of input/output port is arranged to shutter output (ticking before UsePin2asShutterOutput), camera exposes at every turn like this, and the pin of P2 mouth just has a voltage and change to from 0V the triggering signal of 3.3V.
Specific implementation method is as follows: STC89LE516RD+ single-chip microcomputer is programmed, after camera powers on, gather the serial data of sending from serial ports, the form of regulation is as follows: adopt serial ports to send, baud rate is 9600, command format: 55wwxxyyzz.
Be explained as follows: 55 is communication inspection, the time that when ww indicates exposure signal, liquid crystal light valve is opened is divided by 10(16 system) xx represents that the voltage swing 00 of opening represents 0V, 64(16 system) (10 system 100) expression maximum voltage 5V, numeral is linear with voltage. The time that when yy indicates exposure signal, liquid crystal light valve cuts out is divided by 10(16 system):
Zz represents that the voltage swing 00 of closing represents 0V, 64(16 system) (10 system 100) expression maximum voltage 5V, numeral is linear with voltage. For example need often to open 200ms close 200ms xx=200/10=14 (16 system) yy=200/10=14 (16 system) open and close 16 system orders that serial ports sends as 5514641464 taking maximum voltage. For example will often open 100ms and close xx=100/10=0A (16 system) of 800ms, yy=800/10=50 (16 system) opens 3V (10 systems are as 60) voltage taking 2V (10 systems are as 40) voltage and closes. The 16 system orders that serial ports sends are 550A28503C.
The maximum opening time arranging is that the maximum shut-in time of 2550ms is 2550ms.
In the time of ww=0, represent opening time be 0 shutter always in closed condition, the voltage of closing can arrange by said method. In the time of yy=0, represent the shut-in time be 0 shutter always in open mode, the voltage of opening can arrange by said method. In the time there is no the shutter signal of U6, shutter with maximum voltage in closed condition.
Setting serial data sends data with serial ports software afterwards, it is good by set of time that STC89LE516RD+ receives after data, then single-chip microcomputer is just waited for the exposure triggering signal that U6 sends, after triggering signal is sent and is detected by single-chip microcomputer P2.2 mouth, the low and high level of setting-up time before single-chip microcomputer sends from P2.4 mouth according to the time data of serial port setting, in order to control the switch of liquid crystal. Single-chip microcomputer and computer expert cross STC-ISP software and download, and carry out serial communication.
Physical circuit designs as Fig. 4: adopt SP3232 to carry out serial line interface communication, adopt 7805 to carry out power supply voltage stabilizing power supply, adopt LT1084-3.3 that 3.3V power supply is provided, adopt STC89LE516RD+ as master controller.
Liquid crystal light valve outward appearance is as Fig. 5.
The foregoing is only embodiment of the present utility model, every equivalent variations of doing according to the scope of the utility model claims and modification, all should belong to covering scope of the present utility model.
Claims (3)
1. the CCD camera shutter of liquid crystal light valve formula arranges liquid crystal light valve on CCD camera body, it is characterized in that, is also provided with liquid crystal light valve control panel and PC on CCD camera body; Wherein, the serial ports of described liquid crystal light valve control panel and the serial ports of described PC are connected and carry out liquid crystal light valve control; The USB interface of described PC is connected and carries out image data acquiring with the USB interface of CCD camera; Door on described liquid crystal light valve control panel is fast triggers port and is connected with CCD camera shutter signal port; The delivery outlet of described liquid crystal light valve control panel is connected with described liquid crystal light valve.
2. the CCD camera shutter of liquid crystal light valve formula according to claim 1, it is characterized in that, described liquid crystal light valve control panel adopts chip SP3232 to carry out serial line interface communication, adopt chip 7805 to carry out power supply voltage stabilizing power supply, adopt chip LT1084-3.3 that 3.3V power supply is provided, adopt chip STC89LE516RD+ as master controller.
3. the CCD camera shutter of liquid crystal light valve formula according to claim 1 and 2, is characterized in that, the circuit structure of described liquid crystal light valve control panel is as follows:
Select 7805 chips to carry out voltage stabilizing adjusting, output+5V voltage, gives SP3232 communication chip, the power supply of LT1084-3.3 power supply chip;
Select LT1084-3.3 chip to carry out voltage stabilizing adjusting, output+3.3V voltage, powers to STC89LE516RD+ as master controller;
Communication chip adopts SP3232, and data communicate by asynchronous serial bus and PC, adopts SP3232 to complete single-chip microcomputer Transistor-Transistor Logic level: be defined as+5V of high level, and low level is defined as 0V; To PC RS-232 level conversion: be defined as-12V of high level, be defined as+12V of low level:
Master controller adopts the STC89LE516RD+ chip of macrocrystalline science and technology, and its operating frequency range is 0 ~ 80MHz, the FLASH of 64K, and internal RAM size is 1280 bytes, and self is with watchdog circuit; Master control Zhu device is accepted unlatching, time for exposure and the shutdown command that PC sends by serial ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520983978.4U CN205249332U (en) | 2015-12-02 | 2015-12-02 | CCD camera shutter of liquid crystal light valve formula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520983978.4U CN205249332U (en) | 2015-12-02 | 2015-12-02 | CCD camera shutter of liquid crystal light valve formula |
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| Publication Number | Publication Date |
|---|---|
| CN205249332U true CN205249332U (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520983978.4U Expired - Fee Related CN205249332U (en) | 2015-12-02 | 2015-12-02 | CCD camera shutter of liquid crystal light valve formula |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525765A (en) * | 2018-12-21 | 2019-03-26 | 浙江晶鲸科技有限公司 | High-speed image acquisition system and image-pickup method with FLC Light Valve |
| CN111586264A (en) * | 2019-02-15 | 2020-08-25 | 杭州海康威视数字技术股份有限公司 | Image acquisition device and image acquisition method |
-
2015
- 2015-12-02 CN CN201520983978.4U patent/CN205249332U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525765A (en) * | 2018-12-21 | 2019-03-26 | 浙江晶鲸科技有限公司 | High-speed image acquisition system and image-pickup method with FLC Light Valve |
| CN111586264A (en) * | 2019-02-15 | 2020-08-25 | 杭州海康威视数字技术股份有限公司 | Image acquisition device and image acquisition method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20161202 |