Fresnellenshasbeenpaidmoreandmoreattentionandrecognitioninmanyfieldsovertime.Duetothethinthickness,lowquality,lowcostandgoodconcentratingeffectofFresnellens,manyfieldshavebeguntopayattentiontoFresnell
23
2019
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05
Gradient Fresnel lens design for LED road lighting
GradientFresnellensdesignThecurrentFresnellensesareflat-typeorcurvedFresnellensesbasedonsphericalsurfaces.ThereisnoFresnellensbasedonthefree-formsurface,andthefree-formlensiscombinedwiththeFresnellens
04
2019
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05
What is the difference between optical grade PC and PMMA materials?
MainlyfromthefollowingaspectsofthePCandPMMAmateriallensanalysis:1.Physicalproperties:PChasbettertoughnessandimpactstrengththanPMMA,andPMMAisbrittlematerial. 2,temperatureresistance:PCisbetterthanPMMAt
29
2019
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04
Introduction and development of Fresnel lens
ThedesignprincipleofFresnellensisthatthelensisnolongertreatedasawholeduringprocessing,butasanentitycomposedofmanymicrostructuresthatretaintheradiusofcurvatureoftheoriginalconvexlensandremovetheinterme
24
2019
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04
Infrared sensing lens sensing method and application
InfraredlenssensingInthestaticcase,thereisinfraredlightinthespace.Sincethedual-typeprobeadoptscomplementarytechnology,noelectricalsignaloutputisgenerated.Inthedynamiccase,thehumanbodyisinducedbytheAel
15
2019
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04
The application principle of Fresnel lens in projection system
AFresnellensisabranchofalens.Comparedwithotherlenses,ithastheadvantagesofsmallsize,lightweightandcompactstructure.Ithasgoodconcentratingandimagingperformance,andisnotinferiortootherlenses,soitisdefens
08
2019
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04
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