پاورپوینت اجزاء دستگاههای نوری - زبان انگلیسی (pptx) 93 اسلاید
دسته بندی : پاورپوینت
نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )
تعداد اسلاید: 93 اسلاید
قسمتی از متن PowerPoint (.pptx) :
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Components of Optical Instruments
اجزاء دستگاههای نوری
Optical Instruments
six phenomena:
1-absorption
2-emission
3-fluorescence
4-phosphorescence
5-scattering
6-chemiluminescence
Five components:
1-stable source
2-sample holder
3-wavelength selector
4-detector
5-signal processor and readout
Components of optical instruments
1. Absorption
3. Emission and chemiluminescence
2. Fluorescence and phosphorescence
Source Wavelength Selector Sample Detector Readout
Rgb back 146,184. 148
Wavelength 100 180 380 850 2000 18000 40000
Region VUV UV Visible Near IR IR Far IR
Materials for cells, windows, lenses and prisms
LiF
NaCl
KBr
ZnSe
Fused silica or quartz
Corex glass
Silica glass
TlBr or TlI
Construction Materials for Spectroscopic Instruments
Wavelength 100 180 380 850 2000 18000 40000
Region VAC UV Visible Near IR IR Far IR
Sources
Continous
Line
Ar lamp
Xe lamp
H2 or D2 lamp
Tungtstan lamp
Nernst glower ZnO2+Y2O3
Nichrome wire
Glowbar SiC
Hollow cathode lamp
Lasers
Sources for Spectroscopic Instruments
3000 lines/mm Grating 50 lines/mm
Wavelength selectors
Continous
Dis-continous
Fluorite prism
Fused silica or quartz prism
Glass prism
NaCl prism
Interference wedge
Interference filter
KBr prism
Glass filter
Region VAC UV Visible Near IR IR Far IR
Wavelength 100 180 380 850 2000 18000 40000
Wavelength Selectors for Spectroscopic Instruments
Detectors
Photo- electric
Thermal
Photographic plates
Photomultiplier tube
Photo tubes
Photo cells
Photo diodes
Photo conductors
Golay pneumatic cell
Pyroelectric cell
Charge coupled devices
Wavelength 100 180 380 850 2000 18000 40000
Region VAC UV Visible Near IR IR Far IR
Detectors for Spectroscopic Instruments
Thermocouples or bolometers
Light Amplification by Stimulated Emission of Radiation LASER
Characteristics of a laser:
Spatially narrow and intense
Highly monochromatic
Coherence
Power supply
Pumping source
Radiation
Partially transmitting mirror
Mirror
Laser radiation
Nonparallel radiation
Active lasing medium
Schematic of a Laser Source