Spektrometer sederhana yang terkomputerisasi = Simple computerized spectrometer

Vernando, Enrico (2016) Spektrometer sederhana yang terkomputerisasi = Simple computerized spectrometer. Bachelor thesis, Universitas Pelita Harapan.

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Abstract

Optical spectrometer is an optical instrument to observe the spectral lines of light and measure it’s wavelength and intensity. This work reports a simple spectrometer made using slit constructed of cutter blades and grating from the surface of a blank DVD-R disk that can easily be found, as well as using a commercial CCD webcam as a spectrum catcher of light difracted from the grating. The spectrometer has been calibrated using 2 reference wavelengths namely the one of HeNe laser (� = 632.8 nm) and a green laser pointer (� = 523 nm). The spectrometer has a servo motor that can change the position the grating, and hence the measurement range. The image captured by the CCD was analyzed using an online software, the Spectral Work Bench and a simple own-made MATLAB program to get the spectrum under measured. The constructed spectrometer was used to observe spectrum of several light sources like sunlight, red, green, blue lasers, halogen lamp, fluorescent lamp, and white superbright LED. The results of the own-made program show a good spectral shape agreement with the results of the Spectral Work Bench, but show discrepancies in value of wavelength. Since the own-made program has been calibrated, we believe that it is more accurate than the Spectral Work Bench. This simple spectrometer has successfully made with an adjustable range of grating position angle between 0 ° to 180 °, and slit width of 0.02cm to 0.17cm. Experiment, show that for grating position angle of 50°, 55°, and 60°; the measurement range spans from 468.4 nm – 857.9 nm, 532.2 nm – 869.5 nm, and 652,4 nm – 876,5 nm. / Spektrometer optik adalah sebuah sebuah alat optik untuk mengamati garis spektrum cahaya dan mengukur panjang gelombang serta intensitasnya. Spektrometer sederhana ini dibuat dengan menggunakan slit dari mata pisau cutter dan bahan grating yang diambil dari permukaan DVD-R kosong yang dapat dengan mudah ditemui, serta menggunakan CCD webcam sebagai penangkap spektrum cahaya yang didifraksikan oleh grating. Spektrometer ini telah dikalibrasi dengan 2 panjang gelombang referensi yaitu dari laser HeNe (λ=632,8 nm) dan laser pointer hijau (λ=523 nm). Spektrometer ini mempunyai motor servo yang dapat mengubah posisi grating, sehingga juga jangka pengukuran. Hasil tangkapan CCD dianalisis menggunakan software online Spectral Work Bench dan program MATLAB sederhana buatan sendiri untuk mengetahui distribusi panjang gelombang cahaya yang diamati. Spektrometer yang dibuat digunakan untuk mengamati spektrum dari berbagai sumber cahaya seperti cahaya matahari, laser merah, biru, hijau, lampu mobil jenis halogen, lampu fluorescent, dan lampu LED putih jenis superbright. Hasil dari program buatan sendiri menunjukkan kecocokan bentuk spektrum yang baik dengan hasil dari Spectral Work Bench, tetapi menunjukkan perbedaan dalam nilai panjang gelombang. Karena program buatan sendiri telah dikalibrasi, kami percaya program buatan sendiri lebih akurat dari program Spectral Work Bench. Spektrometer sederhana ini telah berhasil dibuat dengan range sudut posisi grating yang dapat diatur antara 0° sampai dengan 180° dan slit dari 0,02cm sampai dengan 0,17cm. Eksperiment menunjukkan bahwa untuk sudut posisi grating 50°, 55°, dan 60° diperoleh jangka pengukuran 468.4 nm – 857.9 nm, 532.2 nm – 869.5 nm, dan 652,4 nm – 876,5 nm.

Item Type: Thesis (Bachelor)
Creators:
CreatorsNIMEmail
Vernando, EnricoUNSPECIFIEDUNSPECIFIED
Contributors:
ContributionContributorsNIDN/NIDKEmail
Thesis advisorUranus, Henri P.UNSPECIFIEDUNSPECIFIED
Thesis advisorPardede, MarincanUNSPECIFIEDUNSPECIFIED
Uncontrolled Keywords: spectrometer; light spectrum; webcam CCD; difraction; grating; measurement range; slit
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: University Subject > Current > Faculty/School - UPH Karawaci > Faculty of Science and Technology > Electrical Engineering
Current > Faculty/School - UPH Karawaci > Faculty of Science and Technology > Electrical Engineering
Depositing User: Esterina M. Jonatan
Date Deposited: 26 Jun 2018 03:14
Last Modified: 16 Aug 2018 09:07
URI: http://repository.uph.edu/id/eprint/396

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