Cov ntaub ntawv yas thiab txhaj tshuaj molding yog lub hauv paus rau cov lo ntsiab muag miniaturized. Cov qauv ntawm cov yas lo ntsiab muag muaj xws li cov khoom siv lens, lub lens chim, lens mount, spacer, shading sheet, siab nplhaib khoom, thiab lwm yam.

Muaj ntau ntau hom khoom siv rau cov lo ntsiab muag yas, txhua yam yog cov yas tseem ceeb (siab molecular polymer). Lawv yog cov thermoplastics, cov yas uas muag muag thiab ua cov yas thaum cua sov, tawv thaum txias, thiab muag muag thaum sov dua. Ib qho kev hloov pauv ntawm lub cev uas ua rau muaj kev hloov pauv ntawm cov kua thiab cov khoom siv hluav taws xob siv cua sov thiab cua txias. Qee cov ntaub ntawv tau tsim ua ntej thiab qee qhov yog qhov tshiab. Qee qhov yog cov ntaub ntawv siv dav dav, thiab qee cov ntaub ntawv tshwj xeeb yog tsim cov khoom siv kho qhov muag, uas yog siv ntau dua hauv qee qhov chaw kho qhov muag.

Hauv kev tsim kho qhov muag, peb yuav pom cov khoom qib ntawm ntau lub tuam txhab, xws li EP8000, K26R, APL5015, OKP-1 thiab lwm yam. Lawv txhua tus yog ib yam ntawm cov khoom siv yas, thiab cov hom hauv qab no muaj ntau dua, thiab peb yuav txheeb lawv raws li lawv lub sijhawm pom:

Cov yas lo ntsiab muag

• l PMMA / Acrylic:Poly (methyl methacrylate), polymethyl methacrylate (plexiglass, acrylic). Vim nws pheej yig tus nqi, siab transmittance, thiab siab mechanical zog, PMMA yog qhov feem ntau hloov iav hauv lub neej. Feem ntau ntawm cov yas pob tshab yog ua los ntawm PMMA, xws li pob tshab daim hlau, pob tshab diav, thiab cov LEDs me me. Lens thiab lwm yam PMMA tau tsim tawm ntau txij li xyoo 1930s.
• PS:Polystyrene, polystyrene, yog xim tsis muaj xim thiab pob tshab thermoplastic, nrog rau cov yas engineering, uas tau pib ntau lawm hauv xyoo 1930. Ntau lub thawv dawb ua npuas ncauj thiab lub thawv noj su uas muaj nyob hauv peb lub neej yog ua los ntawm cov khoom siv PS.
• PC:Polycarbonate, polycarbonate, kuj yog xim tsis muaj xim thiab pob tshab amorphous thermoplastic, thiab nws tseem yog cov yas siv dav dav. Nws tsuas yog industrialized hauv 1960s. Qhov cuam tshuam tsis zoo ntawm cov khoom siv PC yog qhov zoo heev, cov ntawv siv feem ntau suav nrog cov thoob dej, tsom iav, thiab lwm yam.
• l COP & COC:Cyclic olefin Polymer (COP), Cyclic olefin polymer; Cyclic olefin copolymer (COC) Cyclic olefin copolymer, yog amorphous pob tshab polymer khoom nrog lub nplhaib qauv, nrog carbon-carbon ob daim ntawv cog lus nyob rau hauv lub nplhaib Cov cyclic hydrocarbons yog tsim los ntawm cyclic olefin monomers los ntawm tus kheej-polymerization (COP) los yog copolymerization (COC) ) nrog rau lwm cov molecules (xws li ethylene). Cov yam ntxwv ntawm COP thiab COC yuav luag tib yam. Cov khoom no kuj yog tshiab. Thaum nws tau tsim thawj zaug, nws tau txiav txim siab rau qee qhov kev siv kho qhov muag. Tam sim no nws yog dav siv nyob rau hauv zaj duab xis, optical lens, zaub, kev kho mob (lub raj mis ntim) kev lag luam. COP ua tiav kev lag luam ntau lawm nyob ib ncig ntawm 1990, thiab COC ua tiav kev tsim khoom ua ntej 2000.
• l O-PET:Optical polyester optical polyester fiber, O-PET tau ua lag luam hauv Osaka xyoo 2010s.

Thaum txheeb xyuas cov khoom siv kho qhov muag, peb tsuas yog txhawj xeeb nrog lawv cov khoom kho qhov muag thiab cov khoom siv kho qhov muag.

Optical properties

• Refractive Index & Dispersion

Refractive index thiab dispersion

Nws tuaj yeem pom los ntawm daim duab qhia no uas cov khoom siv kho qhov muag sib txawv ntawm cov khoom siv kho qhov muag tau poob rau hauv ob lub sijhawm: ib pab pawg yog siab refractive index thiab siab dispersion; lwm pab pawg yog tsawg refractive index thiab tsawg dispersion. Muab piv rau qhov kev xaiv ntau yam ntawm refractive index thiab dispersion ntawm iav cov ntaub ntawv, peb yuav pom tias qhov kev xaiv ntau yam ntawm refractive index ntawm cov ntaub ntawv yas yog nqaim heev, thiab tag nrho cov optical yas ntaub ntawv muaj ib tug kuj tsis tshua muaj refractive index. Feem ntau hais lus, qhov ntau ntawm cov kev xaiv rau cov ntaub ntawv yas yog nqaim, thiab tsuas muaj li ntawm 10 txog 20 cov khoom lag luam qib, uas feem ntau txwv txoj kev ywj pheej ntawm kev tsim kho qhov muag ntawm cov khoom siv.

Refractive index sib txawv nrog wavelength: Lub refractive Performance index ntawm optical yas cov ntaub ntawv nce nrog wavelength, lub refractive index txo me ntsis, thiab tag nrho cov kuj yog ruaj khov.

Refractive index hloov nrog kub Dn / DT: Qhov kub coefficient ntawm refractive index ntawm optical plastics yog 6 npaug rau 50 npaug loj dua cov iav, uas yog ib tug tsis zoo tus nqi, uas txhais tau hais tias thaum kub nce, lub refractive index txo. Piv txwv li, rau lub wavelength ntawm 546nm, -20 ° C mus rau 40 ° C, dn / dT tus nqi ntawm cov khoom yas yog -8 rau -15X10^-5 / ° C, thaum sib piv, tus nqi ntawm cov khoom iav NBK7 yog 3X10^–6/°C.

• Kev xa tawm

Qhov transmittance

Xa mus rau daim duab no, cov khoom siv kho qhov muag feem ntau muaj kev xa tawm ntau dua 90% hauv qhov pom lub teeb pom kev; lawv kuj muaj qhov xa tawm zoo rau cov kab hluav taws xob infrared ntawm 850nm thiab 940nm, uas muaj ntau hauv cov neeg siv khoom siv hluav taws xob. Kev xa tawm ntawm cov ntaub ntawv yas kuj tseem yuav txo qis rau qee lub sijhawm. Qhov laj thawj tseem ceeb yog vim li cas cov yas absorbs ultraviolet rays nyob rau hauv lub hnub, thiab cov saw molecular lov kom degrade thiab cross-links, ua rau muaj kev hloov nyob rau hauv lub cev thiab tshuaj. Qhov pom tseeb tshaj plaws macroscopic manifestation yog yellowing ntawm cov khoom yas.

• Kev nyuaj siab Birefringence

Lens Refraction

Kev ntxhov siab birefringence (Birefringence) yog cov khoom siv kho qhov muag ntawm cov khoom. Lub refractive index ntawm cov ntaub ntawv muaj feem xyuam rau lub xeev polarization thiab propagation kev taw qhia ntawm teeb meem teeb meem. Cov ntaub ntawv muaj qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov polarization sib txawv. Rau qee lub tshuab, qhov kev sib txawv ntawm qhov refractive index yog me me thiab tsis muaj kev cuam tshuam loj rau lub cev, tab sis rau qee qhov tshwj xeeb kho qhov muag, qhov sib txawv no txaus los ua rau muaj kev puas tsuaj loj ntawm kev ua haujlwm.

Cov ntaub ntawv yas lawv tus kheej tsis muaj cov yam ntxwv anisotropic, tab sis kev txhaj tshuaj molding ntawm cov yas yuav qhia txog kev ntxhov siab birefringence. Qhov laj thawj tseem ceeb yog qhov kev ntxhov siab qhia thaum txhaj tshuaj molding thiab kev npaj ntawm cov yas macromolecules tom qab txias. Qhov kev ntxhov siab feem ntau yog nyob ze ntawm qhov chaw txhaj tshuaj, raws li qhia hauv daim duab hauv qab no.

Lub hauv paus ntsiab lus tsim thiab ntau lawm yog kom txo tau qhov kev ntxhov siab birefringence nyob rau hauv lub optical zoo dav hlau, uas yuav tsum tau ib tug tsim nyog tsim ntawm lub lens qauv, txhaj tshuaj molding pwm thiab ntau lawm tsis. Ntawm ntau cov ntaub ntawv, cov ntaub ntawv PC muaj kev ntxhov siab ntau dua (txog 10 npaug ntau dua li cov ntaub ntawv PMMA), thiab cov ntaub ntawv COP, COC, thiab PMMA muaj kev ntxhov siab tsawg dua.