Koj puas paub qhov kev faib tawm ntawm DOE Lasers? (Part 1)

Diffractive Optical Element (DOE) Lasers yog ib qho khoom siv kho qhov muag tshiab uas tab tom tsim muaj zog nyob rau xyoo tas los no. DOE feem ntau yog siv cov txheej txheem micro-nano etching los tsim ob qhov kev faib tawm ntawm cov khoom sib txawv, txhua qhov sib txawv tuaj yeem muaj qhov tshwj xeeb morphology, refractive index, thiab lwm yam., los tswj cov theem faib ntawm laser wavefront. Lub laser diffraction tom qab dhau los ntawm txhua chav diffraction thiab cuam tshuam ntawm ib qho kev ncua deb (feem ntau infinity lossis focal dav hlau ntawm lub lens), tsim ib qho kev faib tawm ntawm lub teeb siv.

Daim duab 1: A) schematic siv diffractive optical ntsiab; B) Cov ntsiab lus; C) Surface microstructure schematic

Tom qab lub advent ntawm diffraction optical ntsiab nyob rau hauv high-power laser, laser ua, laser kho mob, microscopic imaging, LiDAR, teeb pom kev zoo teeb pom kev zoo, laser zaub, thiab lwm yam teb los qhia ib tug loj daim ntawv thov muaj peev xwm, nws qhov zoo yog mas:

1) High efficiency. Cov qauv tsim kom raug diffraction unit tuaj yeem ua kom ntseeg tau tias ze li ntawm 100 feem pua ​​​​ntawm lub zog laser yog npaj rau ntawm tus qauv xav tau, thiab qhov ua tau zoo yog ntau dua li ntawm lub qhov ncauj qhov ntswg thiab lwm yam.

2) Yooj yim rau siv. Diffractive optical ntsiab muaj qhov me me thiab qhov hnyav thiab tuaj yeem siv tau thaum muab tso rau hauv txoj kev kho qhov muag. Feem ntau, nws tuaj yeem siv nrog cov qauv lo ntsiab muag, daim iav teb, lub hom phiaj microscopic, thiab lwm yam.

3) Flexibility. Ua tsaug rau txoj kev loj hlob sai ntawm micro thiab nano ua tshuab, DOE tuaj yeem hloov kho rau cov lasers sib txawv lossis txawv lub hom phiaj siv lub teeb / theem faib. Tib lub sijhawm, txoj kev teeb pom kev zoo ntawm daim ntawv thov DOE yog qhov yooj yim heev, thiab cov lo ntsiab muag sib txawv tuaj yeem siv los ua kom pom lub teeb ntawm qhov sib txawv ntawm qhov ntau thiab tsawg.

Raws li hom tshiab ntawm cov cuab yeej kho qhov muag, nws yuav tsum nkag siab txog nws cov yam ntxwv thaum xaiv / siv cov khoom siv kho qhov muag diffractive.

2. lub hauv paus ntsiab lus ntawm diffractive optical element xaiv

Raws li kev siv sib txawv, DOE feem ntau tuaj yeem muab faib ua beam shaping, beam splitting, structured light, multi-focus, other special beam generation, and so on. Txhua pawg muaj cov ntsiab cai sib txawv, tsim, thiab cov yam ntxwv ntawm kev siv. Feem ntau, cov hauv paus ntsiab lus hauv qab no yuav tsum tau sau tseg ua ntej xaiv siv DOE cov khoom xyaw:

1) Cov nqaj tsim los ntawm lub diffractive optical keeb tsis tuaj yeem ua txhaum txoj cai nthuav tawm ntawm lub teeb; Qhov tshwj xeeb lub teeb siv hluav taws xob tsim los ntawm nws tsuas yog muaj nyob hauv qhov tob ntawm qhov chaw. Yog li ntawd, thaum siv, qhov xav tau qhov chaw topography, qhov loj me, ua haujlwm nrug, qhov tob ntawm qhov chaw, thiab lwm yam, qee zaum tsis tuaj yeem yog ob qho tib si, thiab kev lag luam tawm yuav tsum tau ua;

2) Diffractive optical ntsiab feem ntau yog tsim raws li lub laser wavelength, beam aperture, beam hom (M2), thiab nyob ze-field siv tis, yog li cov tsis yuav tsum tau ntsuas ntau yog ua ntej xaiv. Qhov kev tsis sib haum xeeb ntawm kev siv tsis siv thiab cov qauv tsim yuav ua rau kev siv tsis zoo lossis txawm tias tsis siv;

3) Diffractive optical ntsiab yog rhiab rau lub kaum sab xis ntawm qhov teeb meem teeb pom kev zoo thiab xav tau kev kho qhov muag kom zoo dua qhov raug thiab ruaj khov;

4) Feem ntau cov khoom siv kho qhov muag pom tau meej meej tswj lub wavefront theem ntawm qhov teeb meem laser, yog li lwm yam khoom siv hauv txoj kev kho qhov muag xws li lub lens inverse / kis, lens, thiab lwm yam, yuav tsum siv high-precision thiab low-wave sib txawv li, txwv tsis pub, nws yuav cuam tshuam qhov kawg tshwm sim;

5) Raws li cov khoom siv sib txawv ntawm cov khoom siv kho qhov muag, raws li qhov yuav tsum tau muaj ntawm qhov sib txawv wavelengths thiab laser siv, diffraction optical ntsiab tuaj yeem ua los ntawm quartz, iav, gems, plastics thiab resins, ZnSe, thiab lwm yam ntaub ntawv infrared, thiab tuaj yeem plated nrog. anti-reflection zaj duab xis.

3. Beam-shaping keeb

Beam shaping nrog DOE tuaj yeem ua tiav cov duab kos duab (square, polygon, strip, nplhaib, thiab lub voj voog, thiab lwm yam) thiab lub zog faib (xws li tiaj tus, Gaussian, nplhaib, M-hom, thiab lwm yam) ntawm qhov chaw ua haujlwm.

1) Sab saum toj lub kaus mom generator

Flat-top tis yog siv nyob rau hauv ntau yam scenes xws li laser kho kev zoo nkauj, laser ua, kho nto, thiab lwm yam. Flat-top beam generators muaj peev xwm hloov ib leeg-transverse lasers (Gaussian faib, M2.< 1.3) Transform into a circular, square, strip, and other uniform light intensity and clear edge distribution.

① Flat-top beam generator nta:

· Haum rau tib hom transverse Gaussian beam, M2 < 1.3;

· Lub tshuab hluav taws xob ncaj nraim muaj qhov zoo tshaj plaws thaum muab tso rau ntawm lub duav ntawm Gaussian beam;

· Lub tshuab hluav taws xob sab saum toj tsis tuaj yeem tsim cov me me nrog qhov ntsuas me dua qhov kev txwv tsis pub muaj qhov sib txawv, feem ntau yog 1.5 txog 5 npaug ntawm qhov kev txwv diffraction;

· Thaum lub tshuab hluav taws xob sab saum toj yog siv, cov khoom siv kho qhov muag yuav tsum muaj qhov sib txawv tsis tshua muaj yoj, thiab qhov aperture zoo yuav tsum muaj ntau tshaj ob npaug ntawm lub duav txoj kab uas hla ntawm qhov teeb meem kab teeb, nyiam dua 2.5 zaug;

· Lub hom phiaj kab teeb pom kev zoo thiab siv qhov sib faib tsuas tuaj yeem khaws cia nyob rau hauv ib qho kev ncua deb, feem ntau yog ib nrab ntawm qhov chaw loj;

· rhiab heev rau qhov xwm txheej lub teeb txoj kab uas hla, qhov teeb meem lub teeb qhov chaw chaw, xwm txheej Angle, thiab lwm yam.

② Cov ntawv thov tseem ceeb ntawm lub tshuab hluav taws xob tiaj tus sab saum toj:

· Laser ua thiab kho: microhole, drilling, vuam, txiav, cim, corrosion

· Tshuaj thiab Zoo nkauj

· Laser zaub

· Marking thiab printing.

2) Optical Diffuser / Homogenizer

Lub beam homogenizer kuj tuaj yeem tsim ntau yam duab thiab sib faib ntawm lub zog (los yog kev faib tshwj xeeb) ntawm lub teeb me ntsis. Tsis zoo li lub tshuab hluav taws xob tiaj tus sab saum toj, uas hloov Gaussian beam mus rau hauv lub tiaj tiaj, lub beam homogenizer homogenizes cov khoom tsis sib xws thiab tsis sib xws. Flat top beam generator rau ib hom (M2< 1.3) Laser use, beam homogenizer for multi-mode laser homogenization effect is better.

Beam homogenizers feem ntau siv lub "diffusion lub kaum sab xis" los qhia qhov sib txawv muaj peev xwm ntawm cov nqaj sib tsoo tom qab dhau los ntawm lub cuab yeej. Lenses ntawm qhov sib txawv focal ntev tuaj yeem xaiv kom ua tiav qhov sib txawv qhov projection.

①Siv cov yam ntxwv ntawm beam homogenizer:

· Insensitive rau qhov ntsug qhov chaw thiab lateral deviation;

· Qhov sib txawv ntawm qhov tshwm sim Lub kaum sab xis yuav ua rau me ntsis nce hauv xoom xaj;

· Insensitive rau qhov teeb meem lub teeb loj thiab polarization; Tsis muaj kev tshwj xeeb rau qhov zoo ntawm cov khoom siv kho qhov muag;

· Cov nyhuv homogenization ntawm ib hom laser nrog me me M2 tsis zoo, thiab muaj kev cuam tshuam fringes, tab sis tus qauv ntug yog qhov tseeb; Cov nyhuv homogenization ntawm ib tug multimode laser nrog ib tug loj M2 yog zoo heev, tab sis lub ntug yog me ntsis plooj.

FIG. Homogenizing nyhuv ntawm beam homogenizer ntawm ib hom (sab laug) thiab ntau hom (txoj cai) laser

Rau ib hom laser homogenization yuav tsum, feem ntau pom zoo kom siv lub tshuab hluav taws xob sab saum toj, yog tias lub tshuab hluav taws xob tsis tuaj yeem siv tau (xws li qhov chaw M2 me me, tab sis qhov sib zog siv tsis tu ncua).

②Main daim ntaub ntawv ntawm beam homogenizer:

· Laser lub teeb siv homogenization thiab shaping

· Kev ua thiab kev kho mob: drilling, melting, marking, marking, welding

· Kev kho mob zoo nkauj

· Beam shaping ntawm excimer laser

· Kev tiv thaiv tshav kub

Cov ntaub ntawv tiv tauj:

Yog tias koj muaj lus nug, thov hu rau peb. Txawm peb cov neeg muas zaub nyob qhov twg thiab peb cov kev xav tau yog dab tsi, peb yuav ua raws li peb lub hom phiaj los muab peb cov neeg siv khoom zoo, tus nqi qis, thiab kev pabcuam zoo tshaj plaws.