Keywords: VPH Solid-phase holographic grating, Transmittance spectrophotometer, spectrometer na-atụgharị uche, Czerny-Turner Optical ụzọ.
1.Nchịkọta
Enwere ike ịkewa fiber optic spectrometer dị ka ntụgharị uche na nnyefe, dịka pịnye grating diffraction si dị.Grating diffraction bụ isi ihe ngwa anya, na-egosipụta ọnụ ọgụgụ buru ibu nke ụkpụrụ kpara nha anya ma n'elu ma ọ bụ n'ime.Ọ bụ ihe dị mkpa akụrụngwa fiber optic spectrometer.Mgbe ọkụ na grating ndị a na-emekọrịta ihe, gbasasịa n'akụkụ dị iche iche nke ogologo ogologo ikuku dị iche iche kpebiri site na ihe a maara dị ka diffraction ọkụ.
N'elu: spectrometer echiche ịkpa oke (aka ekpe) na spectrometer nnyefe (n'aka nri)
A na-ekewakarị grating diffraction ụzọ abụọ: ntụgharị uche na ntinye akwụkwọ.Enwere ike kewaa grating ntụgharị n'ime gratings echiche ụgbọ elu na gratings concave, ebe enwere ike kewaa gratings nnyefe n'ụdị nnyefe grating na olu nke holographic (VPH) nnyefe gratings.Edemede a na-ewebata ụdị ihe nlegharị anya nke ụdị ọkụ ọkụ na-ebufe ụdị VPH grating.
N'elu: Ntụgharị uche grating (aka ekpe) na ntinye akwụkwọ (aka nri).
Kedu ihe kpatara ọtụtụ spectrometers ji ahọrọ mgbasasị grating kama priism?A na-ekpebi ya nke ọma site na ụkpụrụ spectral grating.Ọnụọgụ ahịrị kwa millimita na grating (njupụta ahịrị, otu: ahịrị/mm) na-ekpebi ike nlegharị anya nke grating.Njupụta ahịrị grating dị elu na-ebute nnukwu mgbasawanye nke ìhè nke ogologo wavelength dị iche iche mgbe ọ gafechara na grating, na-eduga na mkpebi ngwa anya dị elu.N'ozuzu, dị na grating groove densities gụnyere 75, 150, 300, 600, 900, 1200, 1800, 2400, 3600, wdg, na-emezu ihe ndị a chọrọ maka ụdị dịgasị iche iche na mkpebi.Mgbe, prism spectroscopy na-ejedebe site na mgbasa nke ihe iko, ebe ihe onwunwe nke iko na-ekpebi ike spectroscopic nke prism.Ebe ọ bụ na ihe ndị na-agbasasị ihe nke iko nwere oke, ọ na-esiri ike ime mgbanwe dị iche iche chọrọ ngwa ngwa dị iche iche.Ya mere, ọ na-adịkarịghị eji ya na miniature fiber optic spectrometers azụmahịa.
Nkebi okwu: Mmetụta dị iche iche nke njupụta grating groove dị iche iche na eserese dị n'elu.
Onu ogugu a na-egosi nleba anya dispersion spectrometry nke ìhè ọcha site na iko na diffraction spectrometry site na grating.
The mmepe akụkọ ihe mere eme nke gratings, malite na kpochapụwo "Young's double-slit experiment": Na 1801, British physics Thomas Young chọpụtara nnyonye anya nke ìhè site na iji okpukpu abụọ gbawara nnwale.Ọkụ monochromatic na-agafe n'oghere abụọ gosipụtara akụkụ akụkụ na-egbuke egbuke na nke gbara ọchịchịrị.Nnwale a gbawara agbawa nke abụọ bu ụzọ kwenye na ọkụ na-egosipụta àgwà ndị yiri ebili mmiri (ụdị ebili mmiri nke ìhè), na-eme ka a na-enwe mmetụta na mpaghara physics.Mgbe nke ahụ gasịrị, ọtụtụ ndị ọkà mmụta sayensị mere nnwale nnyonye anya ọtụtụ ihe wee hụ ihe nhụsianya nke ìhè site na gratings.Ka e mesịrị, ọkà mmụta physics bụ́ Fresnel bụ́ onye France zụlitere ozizi bụ́ isi nke diffraction grating site n’ijikọta usoro mgbakọ na mwepụ nke ọkà mmụta sayensị German bụ́ Huygens wepụtara, na-abata na nsonaazụ ndị a.
Ọnụọgụ a na-egosi nnyonye anya okpukpu abụọ nke Young n'aka ekpe, yana akụkụ na-egbuke egbuke na nke gbara ọchịchịrị.Multi-slit diffraction (n'aka nri), nkesa nke agba agba na iwu dị iche iche.
2.Ntụgharị uche
Igwe ihe nlegharị anya na-ejikarị ụzọ anya nke nwere grating diffraction nke ụgbọ elu na enyo concave, nke akpọrọ Czerny-Turner optical ụzọ.Ọ na-enwekarị mgbawa mgbawa, ụgbọ elu na-enwu ọkụ, enyo nwere oghere abụọ, na ihe nchọpụta.A na-eji nhazi dị elu mara nhazi a site na mkpebi dị elu, ọkụ na-adịghị ala ala, na ntinye anya dị elu.Mgbe mgbama ọkụ ahụ si na mgbawa dị warara banye, a na-ebu ụzọ kpọba ya n'osisi yiri ya site na ihe nlegharị anya concave, nke wee daa n'ọgbara dị iche iche nke planar bụ ebe ogologo ikuku nke mejupụtara ya na-ekewa n'akụkụ dị iche iche.N'ikpeazụ, concave reflector na-elekwasị anya na ìhè gbawara agbawa na fotodetector na akara ngosi nke ogologo ebili mmiri dị iche iche na-edekọ site na pikselụ n'ọnọdụ dị iche iche na mgbawa photodiode, n'ikpeazụ na-emepụta ụdịdị dị iche iche.Dịka, spectrometer ntụgharị gụnyekwara ụfọdụ ihe nzacha na-ebelata ihe nzacha nke abụọ yana anya anya kọlụm iji kwalite ogo ụdị nrụpụta.
Ọnụọgụ a na-egosi ụdị cross-CT optical path grating spectrometer.
Ekwesịrị ikwu na Czerny na Turner abụghị ndị chepụtara usoro ihe a na-ahụ anya kama a na-echetara ha maka onyinye pụrụ iche ha nyere n’ihe banyere nkà mmụta ihe anya—Ọstrelia na-enyocha mbara igwe bụ́ Adalbert Czerny na ọkà mmụta sayensị German bụ́ Rudolf W. Turner.
Enwere ike kewaa ụzọ ngwa anya Czerny-Turner ka ọ bụrụ ụdị abụọ: gafere na mkpughe (ụdị M).Ụzọ anya ụzọ anya gafere/ụdị M-ụdị anya bụ kọmpat karịa.N'ebe a, nkesa symmetrical aka ekpe-aka nri nke enyo concave abụọ metụtara grating ụgbọ elu, na-egosiputa nkwụghachi ụgwọ nke mpụ-axis aberrations, na-ebute mkpebi ngwa anya dị elu.SpectraCheck® SR75C fiber optic spectrometer na-eji ụzọ ngwa anya ụdị M, na-enweta mkpebi anya dị elu ruo 0.15nm na oke ultraviolet nke 180-340 nm.
N'elu: Cross-ụdị ngwa anya ụzọ / gbasaa-ụdị (M-ụdị) ngwa anya ụzọ.
Na mgbakwunye, ewezuga gratings dị larịị, a na-enwekwa ebe a na-adọba ahịhịa.Enwere ike ịghọta grating ọkụ concave dị ka ngwakọta nke mirror concave na grating.Ya mere, spectrometer nke concave blaze grating spectrometer na-enwe naanị mwepu, ihe ọkụ ọkụ concave, na ihe nchọpụta, na-ebute nkwụsi ike dị elu.Agbanyeghị, grating ọkụ concave setịpụrụ ihe a chọrọ na ma ntụzịaka na anya nke ọkụ gbapụrụ iche, na-amachi nhọrọ dịnụ.
N'elu: concave grating spectrometer.
Oge nzipu: Dec-26-2023