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KR970048679A - Focusing Optics for Laser Diodes Using Five Spherical Lenses - Google Patents

Focusing Optics for Laser Diodes Using Five Spherical Lenses Download PDF

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KR970048679A
KR970048679A KR1019950046468A KR19950046468A KR970048679A KR 970048679 A KR970048679 A KR 970048679A KR 1019950046468 A KR1019950046468 A KR 1019950046468A KR 19950046468 A KR19950046468 A KR 19950046468A KR 970048679 A KR970048679 A KR 970048679A
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lens
optical system
curvature
focusing optical
laser diode
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KR100199773B1 (en
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김진태
이재철
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이우복
사단법인 고등기술연구원 연구조합
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0916—Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G02B27/0961—Lens arrays

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

본 발명은 레이저 다이오드(Laser-Diode)의 빔 발산영역의 가로축(X)과 세로축(Y)의 길이의 비가 다를 경우 집속되는 빔의 형상을 필요로 하는 원형상태로 만들어 주기 위한 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계에 관한 것으로, 양면이 소정 곡률을 갖는 제1, 제2렌즈(10)(20)와 평볼록형 제3레즈(30)를 일직선상에 소정간격으로 배치하여 제3렌즈(30)를 통한 빔의 방향이 평행하게 진행되도록 한 제1렌즈군(100)을 구성하고, 양면이 소정 곡률을 갖는 제4, 제5렌즈(40)(50)를 일직선상에 소정간격으로 배치하여 제5렌즈(50)를 통한 빔의 방향이 집속되도록 한 제2렌즈군(200)을 구비하며, 상기 제1렌즈군(100)과 제2렌즈군(200)이 소정간격으로 일직선상에 배치되도록 구성하므로서, 고가의 실린더 렌즈나 6매 구면렌즈를 사용한 집속광학계용 렌즈보다 저렴한 비용으로 가공이 가능하고, 렌즈 매수의 감소에 따른 가공공수를 절약할 수 있으며, 렌즈의 배치가 용이하도록 하는데 그 특징이 있다.According to the present invention, when the ratio of the length of the horizontal axis (X) and the vertical axis (Y) of the beam diverging region of the laser diode (Laser-Diode) is different, five spherical lenses are used to make the circular shape requiring the focused beam shape. The present invention relates to a laser optical focusing optical system used, wherein the first and second lenses 10 and 20 and the planar convex third legs 30 each having a predetermined curvature are disposed on a straight line at a predetermined interval to form a third lens ( The first lens group 100 is configured so that the direction of the beam through the 30 is parallel, and the fourth and fifth lenses 40 and 50 having both sides of the predetermined curvature are arranged at a predetermined interval on a straight line. And a second lens group 200 to focus the beam through the fifth lens 50, and the first lens group 100 and the second lens group 200 are aligned in a straight line at a predetermined interval. Because it is arranged to be arranged, it is cheaper than the lens for focusing optical system using expensive cylinder lens or 6 spherical lens It can be processed in a cost and saving processing in accordance with the reduction in the number of lenses and airborne, the characterized in that the arrangement of the lens easier.

Description

5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계Focusing Optics for Laser Diodes Using Five Spherical Lenses

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

제4도 (a),(b)는 각각 본 발명에 의한 레이저 다이오드용 집속 광학계의 빔 수직 집속(Vertical Focusing)의 추적도 및 수평 집속(Horizontal Focusing)의 추적도.4 (a) and 4 (b) are traces of vertical focusing and traces of horizontal focusing of the laser optical focusing optical system according to the present invention, respectively.

제6도는 본 발명의 집속광학계에 선폭(Linewidth)선택장치를 개재한 예시도.6 is an exemplary view through a linewidth selection apparatus in the focusing optical system of the present invention.

Claims (14)

레이저 빔을 발산하는 레이저 다이오드(LD)와; 가로축(X)과 세로축(Y)의 길이의 비가 다르게 설정되어 수직발산각( )이 수평발산각( )보다 크게 형성되도록 된 발산영역(EA)과; 양면이 소정 곡률을 갖는 제1, 제2렌즈(10)(20)와 평볼록형 제3렌즈(30)를 일직선상에 소정간격으로 배치하여 제3렌즈(30)를 통한 빔의 방향이 평행하게 진행되도록 한 제1렌즈군(100)과; 양면이 소정 곡률을 갖는 제4, 제5렌즈(40)(50)를 일직선상에 소정 간격으로 배치하여 제5렌즈(50)를 통한 빔의 방향이 집속되도록 한 제2렌즈군(200)을 구비하여, 상기 제1 렌즈군과 상기 제2렌즈군이 일직선상에 소정간격 배치되도록 구성됨을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.A laser diode (LD) for emitting a laser beam; The ratio of the length of the horizontal axis (X) to the vertical axis (Y) is set differently so that the vertical divergence angle ( ) Is the horizontal divergence angle ( A diverging region EA formed to be larger than); The first and second lenses 10 and 20 and the flat convex third lens 30 having both surfaces having predetermined curvatures are disposed at a predetermined interval on a straight line so that the beams through the third lens 30 are parallel to each other. A first lens group 100 for proceeding; The second lens group 200 having the second and fourth lenses 40 and 50 having predetermined curvatures on both sides at a predetermined interval on a straight line to focus the direction of the beam through the fifth lens 50. And the first lens group and the second lens group are arranged to be arranged at a predetermined interval in a straight line. 5. 제1항에 있어서, 상기 제1렌즈(10)는 제1면(11)의 곡률이 -0.0183646이고, 제2면(12)의 곡률이 -0.02 임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.The laser diode of claim 1, wherein the first lens 10 has a curvature of −0.0183646 and a second curvature of −0.02 of the second surface 12. Focusing optical system. 제1항에 있어서, 상기 제2렌즈(20)는 제1면(21)의 곡률이 -0.055759 이고, 제2면(22)의 곡률이 -0.0097948 임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.The laser diode of claim 1, wherein the curvature of the first surface 21 is -0.055759 and the curvature of the second surface 22 is -0.0097948. Focusing optical system. 제1항에 있어서, 상기 제3렌즈(30)는 제1면(31)의 곡률이0.000000 이고, 제2면(32)의 곡률이 -0.045241 임을 특징으로 하는 레이저 다이오드용 집속 광학계.The focusing optical system of claim 1, wherein the third lens has a curvature of 0.000000 and a second curvature of −0.045241. 제1항에 있어서, 상기 제4렌즈(40)는 제1면(41)의 곡률이 0.136612 이고, 제2면(42)의 곡률이 0.153846 임을 특징으로 하는 레이저 다이오드용 집속 광학계.The focusing optical system of claim 1, wherein the curvature of the first lens is 0.136612 and the curvature of the second surface is 0.153846. 제1항에 있어서, 상기 제5렌즈(50)는 제1면(51)의 곡률이 0.004이고, 제2면(52)의 곡률이 0.019802 임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.The focusing method of claim 1, wherein the fifth lens 50 has a curvature of 0.004 and a curvature of a second surface 52 of 0.019802. Optical system. 제1항 내지 제6항에 있어서, 상기 각 렌즈(1060)의 제1면과 제2면의 중심거리(Distance)는 2.0임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.The lens of claim 1, wherein each of the lenses (10) 60, the center distance (Distance) of the first surface and the second surface is 2.0 Focusing optical system for a laser diode using five spherical lenses characterized in that. 제1항에 있어서, 상기 레이저 다이오드(LD)의 발산영역(EA)에서 제1렌즈(10)의 제1면(11)까지의 중심거리는 6.312임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.The center distance from the diverging region EA of the laser diode LD to the first surface 11 of the first lens 10 is 6.312. Focusing optical system for a laser diode using five spherical lenses characterized in that. 제1항에 있어서, 상기 제1렌즈(10)의 제2면(12)에서 상기 제2렌즈(20)의 제1면(21)까지의 중심거리는 0.5임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.The center distance from the second surface 12 of the first lens 10 to the first surface 21 of the second lens 20 is 0.5. Focusing optical system for a laser diode using five spherical lenses characterized in that. 제1항에 있어서, 상기 제2렌즈(20)의 제2면(22)에서 상기 제3렌즈(30)의 제1면(31)까지의 중심거리는 0.5임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.The center distance from the second surface 22 of the second lens 20 to the first surface 31 of the third lens 30 is 0.5. Focusing optical system for a laser diode using five spherical lenses characterized in that. 제1항에 있어서, 상기 제3렌즈(30)의 제2면(32)에서 상기 제4렌즈(40)의 제1면(41)까지의 중심거리는 15.0임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.The center distance from the second surface 32 of the third lens 30 to the first surface 41 of the fourth lens 40 is 15.0. Focusing optical system for a laser diode using five spherical lenses characterized in that. 제1항에 있어서, 상기 제4렌즈(40)의 제2면(42)에서 상기 제5렌즈(50)의 제1면(51)까지의 중심거리는 1.5임을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광합계.The center distance from the second surface 42 of the fourth lens 40 to the first surface 51 of the fifth lens 50 is 1.5. Focusing total light for laser diodes using five spherical lenses characterized in that. 제1항에 있어서, 상기 제5렌즈(50)의 제2면(52)에서 상기 라이트 스포트(LS)까지의 중심거리는 43.391임을 특징으로 하는 레이저 다이오드용 집속 광학계.The center distance from the second surface 52 of the fifth lens 50 to the light spot LS is 43.391. Focusing optical system for a laser diode, characterized in that. 제1항 및 제11항에 있어서, 상기 제3렌즈(30)의 제2면(32)에서 상기 제4렌즈(40)의 제1면(41) 사이에 선폭선택장치(300)가 개재됨을 특징으로 하는 5매 구면렌즈를 이용한 레이저 다이오드용 집속 광학계.12. The line width selection device 300 is interposed between the second surface 32 of the third lens 30 and the first surface 41 of the fourth lens 40. Focusing optical system for laser diodes using five spherical lenses. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950046468A 1995-12-04 1995-12-04 Focusing Optics for Laser Diodes Using Five Spherical Lenses Expired - Fee Related KR100199773B1 (en)

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