[ABSTRAK
Dalam penelitian ini, telah dibuat sebuah alat ukur yang dapat mengukurpanjang gelombang cahaya. Dengan memanfaatkan fenomena sifat cahaya,penulis ingin mengetahui besar nilai panjang gelombang dan pola distribusiintensitas difraksi pada cahaya yang melewati kisi difraksi apakah sesuai denganteori berdasarkan referensi. Sumber cahaya yang digunakan berupa sinar lasermerah monokromatik dan polikromatik yang menghasilkan warna RGB sertalampu merkuri. Kisi difraksi dan sumber cahaya digerakkan dengan motor DCyang dilengkapi rotary encoder untuk menentukan posisinya. Semua pergerakanalat ini dikendalikan oleh program LabVIEW National Instrument danpengolahan gambar dilakukan dengan program Vision Assistant. Hasil yangdiperoleh dalam penelitian ini yaitu sumber cahaya merah monokromatikdengan kisi difraksi 300 garis/mm, panjang gelombang cahaya yang dihasilkan(640 - 676) nm dengan besar kesalahan relatif sebesar 0,32 %. Warna birudengan kisi 600 garis/mm, panjang gelombang cahaya yang dihasilkan (454 -475) nm, dengan besar kesalahan relatif sebesar 0,31 %. Warna hijau dengankisi 600 garis/mm, panjang gelombang cahaya yang dihasilkan (524 - 547) nm,dengan besar kesalahan relatif sebesar 0,19 %. Warna merah dengan kisi 600garis/mm, panjang gelombang cahaya yang dihasilkan (654 - 697) nm, denganbesar kesalahan relatif sebesar 0,34 %. Semakin besar orde difraksi makasemakin lemah tingkat intensitas yang dihasilkan.
ABSTRACT
In this research, has created a measuring instrument which can measurelight intensity distribution pattern. By exploiting phenomenon the nature oflight, the author would like to know the value of wave l ength and theintensity distribution of the diffraction pattern on laser light that passes through adiffraction grating so it can be appropriate to reference theory. The source oflight use red of monochromatic, polychromatic light which produce RGB colorand mercury lamp. Grating diffraction and source of light are moved by DCmotor with go forward and go back moving, which next by rotary encoderchange distance become counter in partition. The all of these moving are manageby LabVIEW National Instrument and processing of image is executed ofVision Assistant program. The result of research is red monochromatic withwidth diffraction grating 300 lines/mm, is produced wave length of light (640 -676) nm with relative error 0,32 %. For blue color with width diffraction grating600 lines/mm, is produced wave length of light (454 - 475) nm with relativeerror 0,31 %. For green color with width diffraction grating 600 lines/mm, isproduced wave length of light (524 - 547) nm with relative error 0,19 %. For redcolor with width diffraction grating 600 lines/mm, is produced wave length (654- 697) nm with relative error 0,34 %. The greater order of diffraction then theless level of intensity was resulted.;In this research, has created a measuring instrument which can measurelight intensity distribution pattern. By exploiting phenomenon the nature oflight, the author would like to know the value of wave l ength and theintensity distribution of the diffraction pattern on laser light that passes through adiffraction grating so it can be appropriate to reference theory. The source oflight use red of monochromatic, polychromatic light which produce RGB colorand mercury lamp. Grating diffraction and source of light are moved by DCmotor with go forward and go back moving, which next by rotary encoderchange distance become counter in partition. The all of these moving are manageby LabVIEW National Instrument and processing of image is executed ofVision Assistant program. The result of research is red monochromatic withwidth diffraction grating 300 lines/mm, is produced wave length of light (640 -676) nm with relative error 0,32 %. For blue color with width diffraction grating600 lines/mm, is produced wave length of light (454 - 475) nm with relativeerror 0,31 %. For green color with width diffraction grating 600 lines/mm, isproduced wave length of light (524 - 547) nm with relative error 0,19 %. For redcolor with width diffraction grating 600 lines/mm, is produced wave length (654- 697) nm with relative error 0,34 %. The greater order of diffraction then theless level of intensity was resulted.;In this research, has created a measuring instrument which can measurelight intensity distribution pattern. By exploiting phenomenon the nature oflight, the author would like to know the value of wave l ength and theintensity distribution of the diffraction pattern on laser light that passes through adiffraction grating so it can be appropriate to reference theory. The source oflight use red of monochromatic, polychromatic light which produce RGB colorand mercury lamp. Grating diffraction and source of light are moved by DCmotor with go forward and go back moving, which next by rotary encoderchange distance become counter in partition. The all of these moving are manageby LabVIEW National Instrument and processing of image is executed ofVision Assistant program. The result of research is red monochromatic withwidth diffraction grating 300 lines/mm, is produced wave length of light (640 -676) nm with relative error 0,32 %. For blue color with width diffraction grating600 lines/mm, is produced wave length of light (454 - 475) nm with relativeerror 0,31 %. For green color with width diffraction grating 600 lines/mm, isproduced wave length of light (524 - 547) nm with relative error 0,19 %. For redcolor with width diffraction grating 600 lines/mm, is produced wave length (654- 697) nm with relative error 0,34 %. The greater order of diffraction then theless level of intensity was resulted., In this research, has created a measuring instrument which can measurelight intensity distribution pattern. By exploiting phenomenon the nature oflight, the author would like to know the value of wave l ength and theintensity distribution of the diffraction pattern on laser light that passes through adiffraction grating so it can be appropriate to reference theory. The source oflight use red of monochromatic, polychromatic light which produce RGB colorand mercury lamp. Grating diffraction and source of light are moved by DCmotor with go forward and go back moving, which next by rotary encoderchange distance become counter in partition. The all of these moving are manageby LabVIEW National Instrument and processing of image is executed ofVision Assistant program. The result of research is red monochromatic withwidth diffraction grating 300 lines/mm, is produced wave length of light (640 -676) nm with relative error 0,32 %. For blue color with width diffraction grating600 lines/mm, is produced wave length of light (454 - 475) nm with relativeerror 0,31 %. For green color with width diffraction grating 600 lines/mm, isproduced wave length of light (524 - 547) nm with relative error 0,19 %. For redcolor with width diffraction grating 600 lines/mm, is produced wave length (654- 697) nm with relative error 0,34 %. The greater order of diffraction then theless level of intensity was resulted.] |
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