CN101718521A

CN101718521A - Shooting system and shooting method for high repetition frequency laser pulse faculae

Info

Publication number: CN101718521A
Application number: CN200910199927A
Authority: CN
Inventors: 舒嵘; 亓洪兴; 李正文; 杨俊�; 刘军; 潘明忠
Original assignee: Shanghai Institute of Technical Physics of CAS
Current assignee: Shanghai Institute of Technical Physics of CAS
Priority date: 2009-12-04
Filing date: 2009-12-04
Publication date: 2010-06-02

Abstract

The invention discloses a shooting system and a shooting method for high repetition frequency laser pulse faculae. The shooting system is used for continuously shooting the high repetition frequency laser pulse faculae, and ensures not to omit shooting to any one of the laser pulse faculae from second laser pulse. The shooting system for laser pulse faculae comprises a PIN tube detector (comprising a Lianr), a CMOS or CCD camera (comprising the Lianr), a signal delay circuit system and a data acquisition and control system. The shooting method for laser pulse faculae is based on the principle of simultaneous shooting, and is characterized in that the PIN tube detector firstly responds to each laser pulse in a real time and produces a delay timing start signal, delays a definite time according to repetition frequency of the laser pulse, and then triggers the CMOS or CCD camera to synchronously shoot the current laser pulse faculae. Therefore, when the laser pulse is continuously transmitted with a certain repetition frequency, the CMOS or CCD camera ensures any one of the laser pulses can not be omitted except the first laser pulse.

Description

High repetition frequency laser pulse faculae camera system and image pickup method

Technical field

The present invention relates to the photoelectric instrument technology, specifically be meant the continuous emitted laser pulse of a kind of high repetition frequency hot spot camera system and image pickup method, it is used for position sensing, energy detection and the pattern detection etc. of laser facula.

Background technology

The high recurrent frequency pulse laser device is widely used in the processing of laser ranging, optics, target at present with the field such as taking aim at, in these fields, need survey and analyze the energy distribution feature of laser facula, laser facula position and the information such as shape characteristic on the target target disc usually, this just need take in real time to continuous emitted laser pulse hot spot, especially wishes not omit any one laser pulse when taking statistics analysis.Usually CMOS or CCD camera are not having can't to realize this function under the synchronizing signal situation, and present way is to allow laser instrument launch continuously, and allow CMOS or CCD camera random shooting, and not only efficient is very low, and inconvenient to the data analysis that takes statistics.

Summary of the invention

The objective of the invention is to set up a kind of high repetition frequency laser pulse faculae camera system and image pickup method, can be good at solving the problem that CMOS or CCD camera can't be taken synchronously to the high repetition frequency laser pulse faculae of continuous emission, can guarantee in shooting process, not omit other any one laser pulses since second laser pulse.

As shown in Figure 1, it is characterized in that: it comprises PIN pipe detector (1) (comprising optical lens), CMOS or CCD camera (2) (comprising optical lens), signal delay circuit system (3), data acquistion and control system (4).PIN pipe detector (1) each laser pulse of real-time response also produces delay timing start signal, behind the repetition frequency delay special time of signal delay circuit system (3) according to laser pulse, produce electric signal triggering CMOS or CCD camera (2) again and take current laser pulse hot spot synchronously.Data acquistion and control system (4) is responsible for the delay parameter of signal delay circuit system (3) is provided with, and is responsible for the laser facula data of CMOS or CCD camera (2) shooting are gathered.

High repetition frequency laser pulse faculae image pickup method of the present invention comprises the following steps:

A. the testing laser device is with certain repetition frequency emission laser pulse, and laser pulses irradiate forms laser facula on metope or target disc, and laser facula is arranged in the detection viewing field of PIN pipe detector (1) and CMOS (perhaps CCD) camera (2).Data acquistion and control system (4) sets in advance according to the repeat its transmission frequency of the laser pulse delay parameter to signal delay circuit system (3);

B.PIN manages the light signal of first laser pulse reflection of detector (1) real-time response or scattering and produces electric pulse trigger pip delay circuitry (3) and picks up counting, and the generation electric pulse triggered CMOS or second laser pulse hot spot of CCD camera (2) shooting after signal delay circuit system (3) the default time-delay of basis was provided with and postpones the corresponding time;

When C.CMOS or CCD camera (2) are taken second laser pulse hot spot, the light signal of second laser pulse reflection of PIN pipe detector (1) real-time response or scattering and the timekeeping system that produces electric pulse trigger pip delay circuitry (3) begin reclocking, and signal delay circuit system (3) is provided with according to default time-delay and produces that electric pulse triggers CMOS or CCD camera (2) is taken the 3rd laser pulse hot spot after postponing the corresponding time; By that analogy, CMOS or CCD camera (2) just can be taken the laser pulse hot spot of high repetition continuously.

Advantage of the present invention is:

(1) utilize PIN to manage real-time, the high-speed response ability of detector self, and the delay function that cooperates the signal delay circuit system takes signal synchronously for CMOS or CCD camera provide accurately laser pulse, can guarantee not omit in the laser facula shooting process any laser pulse except that first laser pulse.

(2) because the delay time of signal delay circuit system can be by control system setting able to programme, the laser pulse hot spot that can adapt to different repetition frequencys is taken.

Description of drawings

Fig. 1 is a high repetition frequency laser pulse faculae camera system structural representation of the present invention; Wherein:

1---PIN manages detector (comprising optical lens);

2---CMOS or CCD camera (comprising optical lens);

3---the signal delay circuit system;

4---data acquistion and control system;

5---laser facula;

6---metope or target disc;

7---laser instrument.

Fig. 2 is a high repetition frequency laser pulse faculae image pickup method schematic diagram of the present invention.

Embodiment

Provide better embodiment of the present invention according to Fig. 1 and Fig. 2 below.

The system that is used for the high repetition frequency laser pulse faculae shooting comprises following several sections:

1) PIN pipe detector 1

PIN pipe detector 1 is used for each laser pulse of real-time response and produces electric signal trigger-delay circuit system opening the time-delay timing.Select silicon materials PIN pipe detector for use, response wave length 200-1100nm, optical lens select the ordinary camera camera lens for use.

2) CMOS or CCD camera 2

CMOS or CCD camera 2 are used to take laser facula, pixel resolution 1024x1024, and frame rate is not less than 10Hz, and optical lens is selected the general camera camera lens for use.

3) signal delay circuit system 3

Signal delay circuit system 3 receives the timing start signal that PIN pipe detectors 1 produce, and carries out the signal lag of special time according to the setting of data acquistion and control system, and time-delay finishes the back and produces that electric pulse triggers CMOS or CCD camera 2 is taken laser faculas.

4) data acquistion and control system 4

Data acquistion and control system 4 is provided with according to the repeat its transmission frequency of the laser pulse delay parameter to signal delay circuit system 3, and is responsible for the laser facula data that CMOS or CCD camera 2 are taken are gathered.System selects common computer for use.

Claims

1. high repetition frequency laser pulse faculae camera system, it comprises PIN pipe detector (1), CMOS or CCD camera (2), signal delay circuit system (3), data acquistion and control system (4), it is characterized in that: high speed PIN pipe detector (1) and the optical lens that comprises thereof must must be to the optical maser wavelength sensitivities that will take to the responsive CMOS of the optical maser wavelength that will take or CCD camera (2) and the optical lens that comprises thereof, and possess external electric signal triggering shoot function; PIN pipe detector is each laser pulse of real-time response and generation delay timing start signal at first, behind the repetition frequency delay special time according to laser pulse, triggers CMOS or CCD camera synchronization again and takes current laser pulse hot spot.

2. the high recurrent frequency pulse laser hot spot image pickup method based on the described system of claim 1 is characterized in that comprising the steps:

A. the testing laser device is with certain repetition frequency emission laser pulse, and laser pulses irradiate forms laser facula on metope or target disc, and laser facula is arranged in the detection viewing field of PIN pipe detector (1) and CMOS or CCD camera (2);

The light signal of first laser pulse reflection of B.PIN pipe detector (1) real-time response or scattering and the timekeeping system that produces electric pulse trigger pip delay circuitry (3) pick up counting, and produce after signal delay circuit system (3) postpones the corresponding time according to the repetition frequency of laser pulse that electric pulse triggers CMOS or CCD camera (2) is taken second laser pulse hot spot;

When C.CMOS or CCD camera (2) are taken second laser pulse hot spot, the light signal of second laser pulse reflection of PIN pipe detector (1) real-time response or scattering and the timekeeping system that produces electric pulse trigger pip delay circuitry (3) begin reclocking, and signal delay circuit system (3) produces according to setting in advance that electric pulse triggers CMOS or CCD camera (2) is taken the 3rd laser pulse hot spot after postponing the corresponding time; By that analogy, CMOS or CCD camera (2) just can be taken the laser pulse hot spot of high repetition continuously.