KR950012823A - Light quantity control device of laser diode and its method - Google Patents

Light quantity control device of laser diode and its method Download PDF

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Publication number
KR950012823A
KR950012823A KR1019930020852A KR930020852A KR950012823A KR 950012823 A KR950012823 A KR 950012823A KR 1019930020852 A KR1019930020852 A KR 1019930020852A KR 930020852 A KR930020852 A KR 930020852A KR 950012823 A KR950012823 A KR 950012823A
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KR
South Korea
Prior art keywords
laser diode
signal
light
unit
control
Prior art date
Application number
KR1019930020852A
Other languages
Korean (ko)
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KR970011143B1 (en
Inventor
조정식
Original Assignee
김주용
현대전자산업 주식회사
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Priority to KR1019930020852A priority Critical patent/KR970011143B1/en
Publication of KR950012823A publication Critical patent/KR950012823A/en
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Publication of KR970011143B1 publication Critical patent/KR970011143B1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
    • H01S5/042—Electrical excitation ; Circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • G01J2001/4446—Type of detector
    • G01J2001/446—Photodiode

Abstract

본 발명은 레이저 다이오드를 이용한 레이저 발광 장치에서 발광되는 레이저의 광량을 임의적으로 조정할 수 있도록 한 레이저 다이오의 광량 제어 장치 및 그 방법에 관한 것으로, 종래의 레이저 레이다에서는 반사광의 크기를 분석하여 증폭도를 변화시킴으로써 측정 거리를 확정하는 방법이 사용되어, 거리 또는 기후의 상황을 고려하여 레이저 다이오드의 발광량을 조정하지 않음으로써, 반사 물체 및 환경에 따라 측정 가능한 거리가 변화하게 되는 문제점이 있었다.The present invention relates to a laser diode light quantity control device and a method for arbitrarily adjusting the amount of laser light emitted from a laser light emitting device using a laser diode, and in the conventional laser radar by analyzing the size of the reflected light to change the amplification degree In this case, a method of determining the measurement distance is used, and there is a problem in that the measurable distance varies depending on the reflecting object and the environment by not adjusting the amount of emitted light of the laser diode in consideration of the distance or the weather conditions.

본 발명은 이와같은 종래의 문제점을 감안하여, 발광부에서 발사된 광이 목표물에 맞고 반사되어 수광부에서 검출되는 광량을 분석하고, 그 결과에 따라 발광부의 레이저 다이오드에 공급되는 전력을 제어부에서 조정하여 발광되는 광의 세기를 조정할 수 있도록 함으로써, 목표물의 상황 및 기후의 영향에 따라 측정 가능 거리가 변화되는 것을 방지하도록 한 것이다.In view of the above-described conventional problems, the present invention analyzes the amount of light emitted from the light emitter to be reflected by the target and detected by the light receiver, and adjusts the power supplied to the laser diode of the light emitter according to the result. By adjusting the intensity of the light emitted, it is possible to prevent the measurable distance from changing according to the situation of the target and the influence of the climate.

Description

레이저 다이오드의 광량 제어 장치 및 그 방법Light quantity control device of laser diode and its method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명 레이저 다이오드의 광량 제어 장치 구성도,1 is a configuration diagram of the light amount control device of the laser diode of the present invention,

제2도는 본 발명 레이저 다이오드의 광량 제어 방법 동작 순서도이다.2 is a flowchart illustrating a method of controlling the amount of light of the laser diode of the present invention.

Claims (2)

시스템 전체 동작을 제어, 처리하는 제어부(1)와; 이 제어부(1)의 제어를 받아 레이저 다이오드(2)를 온/오프 제어하는 레어저 다이오드 제어부(3)와; 상기 제어부(1)의 제어를 받아 레이저 다이오드(2)에 전원을 공급하는 레이저 다이오드 전원부(4)와; 상기 레이저 다이오드(2)에서 발광된 광신호를 수광하여 전류신호로 변환하는 포토 다이오드(5)와; 이 포토 다이오드(5)에서 광전 변환된 전류신호를 전압신호로 변환하는 전류/전압 변환부(6)와; 이 전류/전압 변환부(6)에서 변환된 전압신호를 증폭시키는 증폭부(7)와; 이 증폭부(7)에서 증폭된 신호를 디지탈 신호로 변환하는 파형 정형부(8)와; 이 파형 정형부(8)에서 변환된 디지탈 신호 및 상기 제어부(1)에서 발생된 제어신호를 비교, 출력하는 비교부(9)와; 상기 증폭부(7)에서 증폭된 신호의 최대치를 홀드 시키는 피크 홀드부(10)와; 이 피크 홀드부(10)에서 홀드된 최대치를 그 값에 해당하는 디지탈 값으로 변환하여 상기 제어부(1)로 입력하는 아날로그/디지탈 변환부(11)로 구성함을 특징으로 하는 레이저 다이오드의 광량 제어 장치.A controller 1 for controlling and processing the entire system operation; A laser diode controller 3 for controlling the laser diode 2 on / off under the control of the controller 1; A laser diode power supply unit 4 for supplying power to the laser diode 2 under the control of the control unit 1; A photodiode (5) for receiving the optical signal emitted from the laser diode (2) and converting it into a current signal; A current / voltage converter 6 for converting the current signal photoelectrically converted by the photodiode 5 into a voltage signal; An amplifier 7 for amplifying the voltage signal converted by the current / voltage converter 6; A waveform shaping section 8 for converting the signal amplified by the amplifying section 7 into a digital signal; A comparison unit 9 for comparing and outputting the digital signal converted by the waveform shaping unit 8 and the control signal generated by the control unit 1; A peak hold part (10) for holding a maximum value of the signal amplified by the amplification part (7); Light amount control of the laser diode, characterized in that composed of an analog / digital conversion unit 11 converting the maximum value held in the peak holding unit 10 to a digital value corresponding to the value and input to the control unit 1. Device. 레이저 다이오드를 온 시켜 레이저 광을 밀광시킨 후, 수광된 신호를 검지하는 비교부의 비교 출력 신호를 읽어 들이는 단계(S1)와; 비교부에서 비교 출력된 신호가 로우 즉 정상인가를 판단하는 단계(S2)와; 정상이 아닌 경우 시스템 작동을 중지하고 에러 신호를 출력하는 단계(S3)와; 정상인 경우 아날로그/디지탈 변환부로부터 아날로그 신호로 변환된 최대치 수광량을 읽어 들이는 단계(S4)와; 읽어 들인 수광량을 분석하여 분석된 결과에 따라 증폭부의 이득 및 레이저 다이오드의 전원을 조정하는 단계(S5)로 순차 동작함을 특징으로 하는 레이저 다이오드의 광량 제어방법.Reading the comparison output signal of the comparator which detects the received signal after turning on the laser diode to densify the laser light (S1); Determining whether the signal output from the comparator is low or normal (S2); Stopping the system operation and outputting an error signal if it is not normal (S3); (S4) reading a maximum value received amount converted into an analog signal from the analog / digital conversion unit in the normal case; And adjusting the gain of the amplifier and the power supply of the laser diode according to the analyzed result by analyzing the received amount of received light (S5). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930020852A 1993-10-08 1993-10-08 Laserdiode control system for quantity of light and method of the same KR970011143B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930020852A KR970011143B1 (en) 1993-10-08 1993-10-08 Laserdiode control system for quantity of light and method of the same

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Application Number Priority Date Filing Date Title
KR1019930020852A KR970011143B1 (en) 1993-10-08 1993-10-08 Laserdiode control system for quantity of light and method of the same

Publications (2)

Publication Number Publication Date
KR950012823A true KR950012823A (en) 1995-05-17
KR970011143B1 KR970011143B1 (en) 1997-07-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100392784B1 (en) * 2001-09-06 2003-07-25 학교법인 포항공과대학교 Method and apparatus for controlling a power supply
KR100562422B1 (en) * 2004-08-13 2006-03-23 주식회사 이오테크닉스 Laser trouble preventing method and its preventing apparatus
KR100852256B1 (en) * 2006-10-16 2008-08-14 미승씨엔에스검사주식회사 Apparatus for measuring displacement in a construction structure
KR20150018025A (en) * 2013-08-08 2015-02-23 엘지전자 주식회사 Optical device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100392784B1 (en) * 2001-09-06 2003-07-25 학교법인 포항공과대학교 Method and apparatus for controlling a power supply
KR100562422B1 (en) * 2004-08-13 2006-03-23 주식회사 이오테크닉스 Laser trouble preventing method and its preventing apparatus
KR100852256B1 (en) * 2006-10-16 2008-08-14 미승씨엔에스검사주식회사 Apparatus for measuring displacement in a construction structure
KR20150018025A (en) * 2013-08-08 2015-02-23 엘지전자 주식회사 Optical device

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Publication number Publication date
KR970011143B1 (en) 1997-07-07

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