Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, lasers tau siv dav hauv kev lag luam, kev kho mob, kev tshawb fawb thiab lwm yam haujlwm. Txawm li cas los xij, qhov kev siv siab thiab monochromatic xwm ntawm lasers kuj ua rau muaj kev nyab xeeb, tshwj xeeb tshaj yog kev hem thawj rau lub qhov muag. Yog tias 1000mW 450nm laser pointer siv tsis raug, nws yuav ua rau lub qhov muag puas, pob txha kub hnyiab thiab lwm yam teeb meem. Yog li ntawd, nws yog ib qho tseem ceeb kom nkag siab thiab siv taukev tiv thaiv laser zoo.
Lub laser pointer ua haujlwm li cas?
Lub laser pointer yog ib qho khoom siv uas ua rau lub teeb ci laser, feem ntau muaj qhov nruab nrab ntawm qhov nruab nrab (khoom, roj, lossis semiconductor) thiab cov kab noj hniav kho qhov muag. Qhov nruab nrab qhov nce tau zoo siab los ntawm lub zog sab nraud, xws li lub roj teeb, ua rau cov hluav taws xob ntawm cov atoms lossis cov molecules hauv nws mus txog qib siab dua. Thaum cov electrons rov qab los rau hauv lawv lub xeev hauv av, lawv emit photons sib xws rau lawv qhov sib txawv ntawm lub zog.
Daim iav nyob rau hauv lub qhov muag kab noj hniav qhia txog cov generated photons rov qab mus rau hauv lub nce nruab nrab, ntxiv exciting lwm electrons. Thaum lub sij hawm tus txheej txheem no, photons xav rov qab thiab tawm mus, stimulating ntau electrons los tsim stimulated emission, yog li tsim lub teeb nyob rau hauv ib qho kev taw qhia thiab cov wavelength tshwj xeeb - uas yog, laser lub teeb. Thaum kawg, ib feem ntawm cov nqaj khiav tawm los ntawm ib feem ntawm daim iav, ua rau lub teeb laser peb pom.
Laser pointer siv
1000mW 450nm laser pointer yog siv nyob rau hauv cov nram qab no yam:
1. Kev ua qauv qhia thiab kev kawm:Cov kws qhia ntawv thiab cov neeg hais lus feem ntau siv laser pointers los coj cov neeg tuaj saib.
2. Cov ntaub ntawv khaws cia thiab nyeem ntawv:CD thiab DVD players siv cov lasers qis los nyeem cov ntaub ntawv.
3. Kev tshawb fawb thiab kev sim:Hauv kev sim tshawb fawb, laser pointers tuaj yeem siv rau qhov chaw, ntsuas thiab cim.
4. Kev lom zem:Laser pointers feem ntau yog siv rau teeb pom kev zoo thiab kev lom zem lub hom phiaj.
5. Pointer thiab positioning:siv los ua tus taw qhia qhov tseeb hauv cov rooj sib tham thiab cov lus qhuab qhia.
Cov kev phom sij ntawm kev raug mus ntev rau laser pointers
Lub sij hawm ntev los yog siab siv laser raug tuaj yeem ua rau cov teeb meem hauv qab no rau lub qhov muag:
1. Retinal puas:Laser nyob rau hauv lub teeb xiav band (xws li 450nm) tuaj yeem nkag mus rau lub lens thiab cornea ntawm lub qhov muag thiab ncav cuag lub retina ncaj qha. Muaj ntau cov cell photoreceptors hauv retina. Ntev ntev raug rau lub zog siab laser lub teeb yuav ua rau muaj kev puas tsuaj rau cov cell photoreceptor thiab txawm tias tsis pom kev mus tas li.
2. Photochemical nyhuv:Laser tuaj yeem ua rau muaj tshuaj lom neeg, hloov cov qauv ntawm tes, thiab ua rau muaj kev puas tsuaj mus ntev.
3. Cov nyhuv thermal:Lub zog laser tuaj yeem nqus los ntawm cov ntaub so ntswg intraocular thiab hloov mus rau hauv lub zog kub, ua rau kub hnyiab.
4. Mechanical teebmeem:Qhov hluav taws xob siab ntawm lub laser yuav ua rau lub cev puas tsuaj rau cov ntaub so ntswg sab hauv ntawm lub qhov muag.
Kev tiv thaiv qhov muag
Txhawm rau tiv thaiv koj ob lub qhov muag los ntawm cov teeb meem laser pointer, cov kev tiv thaiv hauv qab no yuav tsum tau ua:
1. Hnavlaser tiv thaiv tsom iav:Cov tsom iav no muaj cov ntxaij lim dej tshwj xeeb uas tuaj yeem thaiv lossis txo qis laser lub teeb ntawm cov wavelengths tshwj xeeb los tiv thaiv lawv ntawm qhov muag. Kev xaiv cov looj tsom iav yuav tsum yog nyob ntawm lub wavelength, lub zog thiab hom kev ua haujlwm ntawm lub laser.
2. Siv cov ntxaij vab tshaus los yog thaiv kev nyab xeeb:Muab cov teeb meem nyob rau hauv txoj kev ntawm lub laser kom txo tau tawg pleb thiab reflected laser teeb ncav cuag lub qhov muag.
3. Tswj ib puag ncig uas siv lub laser:Xyuas kom tseeb tias muaj teeb pom kev txaus nyob rau hauv qhov chaw uas siv lub laser, thiab tsis txhob siv lub laser pointer nyob rau hauv ib qho chaw tsaus, vim qhov tsaus-adapted ob lub qhov muag yog rhiab heev rau lub teeb.
4. txwv tsis pub saib cov lasers:Lub laser beam yuav tsum tsis txhob saib ncaj qha, txawm tias muaj lub zog qis laser pointer.
5. Kev kawm thiab kev cob qhia:Muab kev cob qhia raulaser kev nyab xeebkom ntseeg tau tias txhua tus neeg ua haujlwm nkag siab txog qhov muaj peev xwm txaus ntshai ntawm lasers thiab cov kev tiv thaiv tsim nyog.
6. Ua raws li cov cai tswj kev nyab xeeb:Ua raws li cov qauv kev nyab xeeb thoob ntiaj teb thiab hauv tsev, xws li ANSI Z136.1 lossis EN 207/208, thiab lwm yam.
Los ntawm kev siv cov kev ceev faj no, qhov kev pheej hmoo ntawm qhov muag puas los ntawm laser pointers tuaj yeem txo qis. Nws yog ib qho tseem ceeb uas tsis muaj teeb meem dab tsi ntawm laser siv, cov txheej txheem kev nyab xeeb yuav tsum tau ua raws li nruj me ntsis kom ntseeg tau tias muaj kev nyab xeeb ntawm cov neeg ua haujlwm thiab cov neeg sawv cev.