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CALTECH APH 162 - Optical Materials

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449911Email: [email protected] • Web: newport.comOpticsTECHNICAL REFERENCE ANDFUNDAMENTAL APPLICATIONSLENS SELECTION GUIDE SPHERICAL LENSES CYLINDRICAL LENSES KITS OPTICAL SYSTEMS MIRRORSOptical MaterialsBK 7BK 7 is one of the most commonborosilicate crown glasses used forvisible and near infrared optics. Its highhomogeneity, low bubble content, andstraightforward manufacturability make ita good choice for transmissive optics.The transmission range for BK 7 is380–2100 nm. It is not recommended fortemperature sensitive applications, suchas precision mirrors.BK 7UV Grade Fused SilicaUV Grade Fused Silica is syntheticamorphous silicon dioxide of extremelyhigh purity. This non-crystalline, colorlesssilica glass combines a very low thermalexpansion coefficient with good opticalqualities, and excellent transmittance inthe ultraviolet. Transmission andhomogeneity exceed those of crystallinequartz without the problems oforientation and temperature instabilityinherent in the crystalline form. Fusedsilica is used for both transmissive andreflective optics, especially where highlaser damage threshold is required.UV Fused SilicaCaF2Calcium Fluoride is a cubic single crystalmaterial grown using the vacuumStockbarger Technique with good vacuumUV to infrared transmission. CaF2’sexcellent UV transmission, down to 170nm, and non-birefringent properties makeit ideal for deep UV transmissive optics.Material for IR use is grown usingnaturally mined fluroite, at much lowercost. CaF2is sensitive to thermal shock,so care must be taken during handling.CaF2MgF2Magnesium Fluoride is a positivebirefringent crystal grown using thevacuum Stockbarger Technique with goodvacuum UV to infrared transmission. It istypically oriented with the c axis parallelto the optical axis to reduce birefringenteffects. High vacuum UV transmission,down to 150 nm, and its proven use influorine environments make it ideal forlenses, windows, and polarizers forExcimer lasers. MgF2is resistant tothermal and mechanical shock.MgF2Crystal QuartzCrystal Quartz is a positive uniaxialbirefringent single crystal grown using ahydrothermal process. It has goodtransmission from the vacuum UV to thenear infrared. Due to its birefringentnature, crystal quartz is commonly usedfor wave plates.CrystalQuartzPyrex®Pyrex®is a borosilicate glass with a lowcoefficient of thermal expansion. It ismainly used for non-transmissive optics,such as mirrors, due to its lowhomogeneity and high bubble content.Zerodur®Zerodur®is a glass ceramic material thathas a coefficient of thermal expansionapproaching zero, as well as excellenthomogeneity of this coefficientthroughout the entire piece. This makesZerodur ideal for mirror substrates whereextreme thermal stability is required.Zerodur should not be used fortransmissive optics due to inclusions inthe material.449922Phone: 1-800-222-6440 • Fax: 1-949-253-1680OpticsTECHNICAL REFERENCE ANDFUNDAMENTAL APPLICATIONSLENS SELECTION GUIDESPHERICAL LENSESCYLINDRICAL LENSESKITSOPTICAL SYSTEMSMIRRORSIndex of RefractionWavelength(nm) Source BK 7 SF 2 UV Fused SilicaCaF2MgF2noMgF2neCrystal QuartznoCrystal Quartzne193 ArF excimer laser 1.65528 1.52127 1.56077 1.50153 1.42767 1.44127 1.66091 1.67455244 Ar-Ion laser 1.58265 1.98102 1.51086 1.46957 1.40447 1.41735 1.60439 1.61562248 KrF excimer 1.57957 1.93639 1.50855 1.46803 1.40334 1.41618 1.60175 1.61289257 Ar-Ion laser 1.57336 1.86967 1.50383 1.46488 1.40102 1.41377 1.59637 1.60731266 Nd:YAG laser 1.56796 1.82737 1.49968 1.46209 1.39896 1.41164 1.59164 1.60242308 XeCl excimer laser 1.55006 1.73604 1.48564 1.45255 1.39188 1.40429 1.57556 1.58577325 HeCd laser 1.54505 1.71771 1.48164 1.44981 1.38983 1.40216 1.57097 1.58102337.1 N2laser 1.54202 1.70749 1.47919 1.44813 1.38858 1.40085 1.56817 1.57812351 XeF excimer laser 1.53896 1.69778 1.47672 1.44642 1.38730 1.39952 1.56533 1.57518351.1 Ar-Ion laser 1.53894 1.69771 1.47671 1.44641 1.38729 1.39951 1.56531 1.57516354.7 Nd:YAG laser 1.53821 1.69548 1.47612 1.44601 1.38699 1.39920 1.56463 1.57446363.8 Ar-Ion laser 1.53649 1.69029 1.47472 1.44504 1.38626 1.39844 1.56302 1.57279404.7 Mercury arc, h line 1.53023 1.67263 1.46961 1.44151 1.38360 1.39567 1.55714 1.56670416 Kr-Ion laser 1.52885 1.66893 1.46847 1.44072 1.38301 1.39505 1.55583 1.56535435.8 Mercury arc,g line 1.52669 1.66331 1.46670 1.43949 1.38207 1.39408 1.55379 1.56323441.6 HeCd laser 1.52611 1.66184 1.46622 1.43916 1.38183 1.39382 1.55324 1.56266457.9 Ar-Ion laser 1.52461 1.65807 1.46498 1.43830 1.38118 1.39314 1.55181 1.56119465.8 Ar-Ion laser 1.52395 1.65641 1.46443 1.43792 1.38088 1.39284 1.55118 1.56053472.7 Ar-Ion laser 1.52339 1.65505 1.46397 1.43760 1.38064 1.39258 1.55065 1.55998476.5 Ar-Ion laser 1.52309 1.65432 1.46372 1.43744 1.38051 1.39245 1.55036 1.55969480 Cadmium arc, F’ line 1.52283 1.65367 1.46350 1.43728 1.38040 1.39233 1.55011 1.55943486.1 Hydrogen arc, F line 1.52238 1.65258 1.46313 1.43703 1.38020 1.39212 1.54968 1.55898488 Ar-Ion laser 1.52224 1.65225 1.46301 1.43695 1.38014 1.39206 1.54955 1.55885496.5 Ar-Ion laser 1.52165 1.65083 1.46252 1.43661 1.37988 1.39179 1.54898 1.55826501.7 Ar-Ion laser 1.52130 1.65000 1.46223 1.43641 1.37973 1.39163 1.54865 1.55792510.6 Cu vapor laser 1.52073 1.64865 1.46176 1.43609 1.37948 1.39137 1.54810 1.55735514.5 Ar-Ion laser 1.52049 1.64808 1.46156 1.43595 1.37937 1.39126 1.54787 1.55711532 Nd:YAG laser 1.51947 1.64570 1.46071 1.43537 1.37892 1.39079 1.54689 1.55610543.5 HeNe laser 1.51886 1.64427 1.46019 1.43502 1.37865 1.39051 1.54630 1.55549546.1 Mercury arc, e line 1.51872 1.64397 1.46008 1.43494 1.37859 1.39044 1.54617 1.55535578.2 Cu vaport laser 1.51720 1.64053 1.45880 1.43408 1.37792 1.38974 1.54470 1.55383587.6 Helium arc, d line 1.51680 1.63963 1.45846 1.43385 1.37774 1.38956 1.54431 1.55343589.3 Sodium arc, D line 1.51673 1.63947 1.45840 1.43381 1.37771 1.38952 1.54424 1.55336594.1 HeNe laser 1.51653 1.63904 1.45824 1.43370 1.37762 1.38943 1.54405 1.55316611.9 HeNe laser 1.51584 1.63752 1.45765 1.43331 1.37732 1.38911 1.54337 1.55247628 Ruby laser 1.51526 1.63626 1.45716 1.43298 1.37706 1.38884 1.54281 1.55188632.8 HeNe laser 1.51509 1.63590 1.45702 1.43289 1.37698 1.38876 1.54264 1.55171635 Laser diode 1.51501 1.63574 1.45695 1.43284 1.37695 1.38873 1.54257 1.55164643.8 Cadmium arc, C' line 1.51472 1.63512 1.45671 1.43268 1.37682 1.38859 1.54228 1.55134647.1 Kr-Ion laser 1.51461 1.63489 1.45661 1.43262 1.37677 1.38854 1.54218 1.55123650 Laser diode 1.51452 1.63469 1.45653 1.43257 1.37673


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