Cac Loai Mang Mong Quang

Mng quang hc

Mng chng phn x Mng phn x cao Mng dn in trong sut Mng bn thu Knh lc nh sng.

Mng quang hc n gin :ph kim loi ln thy tinh.

Mng phn xVng phn xAl88 - 92 %nh sng kh kinAg95 - 98 % hng ngoi< 90 %t ngoi Au98 - 99 %hng ngoi

H s phn x

H s truyn qua : T = 1 - R ( b qua s hp th v tn x )VD : Vi thy tinh thng thng ( ns = 1.5 )nh sng kh kin truyn t khng kh ( no = 1 ) R = 0.04 nh sng truyn qua 96 %S truyn qua ca nh sng

1. Mng chng phn xMng RayleighPh 1 lp vt liu trn b mt thy tinh s lm gim h s phn x.- Chit sut tt nht cho lp ph : VD : lp ph ln b mt thy tinh cn c chit sut n1 = ( 1.5 )1/2 = 1.225- Khng c vt liu c chit sut ph hp chnh xc. Thng thng chn MgF2 ( n1 = 1.38 )

1. Mng chng phn xCu trc MgF2

1. Mng chng phn xKhi tia ti sau khi phn x 2 mt phn cch s giao thoa trit tiu vi nhau do ngc pha nhau. Tt c nh sng s c truyn qua . ( trng hp l tng ) Gi s c th iu khin chnh xc dy lp ph ( /4 ) gi l lp ph sng ( quarter-wave coating )

1. Mng chng phn xThc t, cng nh sng s thay i khi qua lp ph. dy lp ph : o/4nVi o : bc sng s trong chn khngMng MgF2

1. Mng chng phn x

Mng chng phn x n lp chng phn x bc sng gia vng kh kinVt liu mng l cc cht in mi chit sut thp : MgF2, Na3AlF6, CaF2, LiF2u im : - D ch to- D kim sot b dy

1. Mng chng phn x

Mng chng phn x hai lp chng phn x vi ton vng ph kh kin.Lp ngoi : cht in mi chit sut thp, bn vi mi trng ( MgF2, Na3AlF6 , CaF2) : n1 < n2 Lp th hai : cht in mi chit sut cao, c bm tt vi thy tinh ( ZnO, TiO2, CeF3, ThO2) : n2 > n3u im :Cho h s phn x thp hn so vi mng n lp

1. Mng chng phn x

Mng chng phn x ba lpH s phn x R rt nh : < 0.1% - 0.01% trong sut dy rng bc sng nh sng.

1. Mng chng phn x

ng dng :Pin mt tri : ph lp chng phn x cho php gi li nh sng chiu ti mi gc .Knh eo mt, knh xe hi, thu knh, thit b quang hc

2. Mng lc giao thoa- Ph ln thy tinh cc lp mng mng quang hc c chit sut khc nhau.- nh sng phn x ti cc mt phn cch gia cc lp ph nh sng s tng cng hay trit tiu to ra cc musa81c khc nhauBng cch kim sot dy cng nh s lp ph ta s thu c nh sng phn x hay truyn qua ty mc ch s dng.

2. Mng lc giao thoau im :Tnh cht lc tt hn, thit b quang ph lp lc giao thoa t mt mt nhit hn cc mng lc thng thng

Nhc im : Gi thnh cao Mng lc giao thoa thy tinh d v hn so vi mng lc giao thoa nha

3. Mng ITO ( Indium Tin Oxide ) Mng c truyn qua cao ( 80% - 90% ). Phn x mnh i vi nh sng hng ngoi ( dng dng ph ln b mt knh, cho php nh sng truyn qua nhng gi li nhit bn trong hay bn ngoi ty mc ch s dng ). dn in tt. ng dng rng ri trong trong lnh vc quang in t : LCD, pin mt tri, diod pht quang,Mng dn in trong sut

3. Mng ITO ( Indium Tin Oxide )

In 2O3 SnO2Mng dn in trong sut


Cu trc tinh th In2O3:Sn- Pha tp Sn vo thay th ion In3+ . Sn s u tin thay th ion In3+ v tr b v s hnh thnh kin kt xen k vi oxi to SnO hay SnO2. - Hng s mng ITO : 10,12 10,31 Ao ( gn vi hng s mng ca In2 O3 ) n v ca In2O3:Sn c khong 40 nguyn t. Khi Sn vo thay th In3+ v tr b hay d s to nn h c khong 2.5 at% Sn v 1021/cm3 in t t do.Mng dn in trong sut


Cc loi sai hng

Trong mng ITO, e- t do c to ra do s tn ti cc nt khuyt oxi ha tr 2 hay do s thay th nguyn t Sn ha tr 4.

Sai hng ion tp cht Sn thay th (Sn*)

Sn Sn* + 1 e-

Sai hng trung ha (Sn2*Oi2-)

Hai ion Sn 4+ kt hp vi 1 anion oxi to (Sn2*Oi2-) trung ha. Sai hng ny khng nh hng ti cu trc mng tinh th nn n b tch ra trong qu trnh x l nhit

Sn2*Oi2- 2 Sn* + 2 e- + O2 (g)

Mng dn in trong sut


Cc loi sai hng

Sai hng trung ha (Sn2O 4)x

- Hai ion Sn 4+ lin kt vi ba anion ln cn gn nht v 1 ion oxi in kch to (Sn2O4)x- Xy ra khi nng pha tp cao. Do lin kt Sn-O mnh, khng b t khi gia nhit sai hng ny c nh hng n cu trc mng

Sai hng trung ha

(Sn2*Oi2-) + (Sn2O4)x (Sn2*Oi2-)(Sn2O4)x

Nt khuyt oxi Vo**

Ox Vo** + 2 e- + O2 (g)

Mng dn in trong sut

3. Mng ITO ( Indium Tin Oxide ) Mng dn in trong sutTnh cht quang ca mng ITO

3. Mng ITO ( Indium Tin Oxide ) Mng dn in trong sutMng ITO to bng phng php phn x Bia : In2O 3 : SnO 2 ( 9 : 1 wt% ) Kh p : Ar , O2 ( 50 Sccm , 2 sccm )- Cng sut : 4.2 Kw Khong cch bia- : 8 cm

3. Mng ITO ( Indium Tin Oxide ) Mng dn in trong sutMng ITO to bng phng php phn xKch thc ht cng nh gh gh b mt tng khi tng kch thc mng ( ph hp vi kt qu XRD ).

3. Mng ITO ( Indium Tin Oxide ) Mng dn in trong sutTnh cht quang ca mng ITO to bng pp phn x truyn ph thuc vo cu trc cng nh hnh thi b mt mng ( truyn qua gim khi dy mng tng )

*Tren thc te,lop phu chong phan xa ko chi giam he so phan xa ma con bi anh huong boi su giao thoa tren 1 lop mong

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Cac Loai Mang Mong Quang