EP 1194799 A1 20020410 - NARROW-BAND OPTICAL INTERFERENCE FILTER
Title (en)
NARROW-BAND OPTICAL INTERFERENCE FILTER
Title (de)
INTERFERENZOPTISCHES SCHMALBANDFILTER
Title (fr)
FILTRE OPTIQUE INTERFERENTIEL A BANDE ETROITE
Publication
Application
Priority
- DE 19932082 A 19990712
- EP 0006518 W 20000710
Abstract (en)
[origin: DE19932082A1] The invention relates to a narrow-band optical interference filter for a wavelength ( lambda 0) comprising a plurality of dielectric layers, whereby said dielectric layers alternately have a high (nH) and a low refractive index (nL) and the optical layer thickness of the dielectric layers amounts to lambda /4 or lambda /2 or an integral multiple thereof. The invention is characterized in that at least one lambda /4 or lambda /2 layer of the layer system has a refractive index differing from the high (nH) or low refractive index (nL) of the other layers in the layer system so that the formation of "ripples" in the transmission band of the filter is reduced.
IPC 1-7
IPC 8 full level
C23C 16/515 (2006.01); G02B 5/28 (2006.01)
CPC (source: EP)
C23C 16/515 (2013.01); G02B 5/281 (2013.01); G02B 5/288 (2013.01)
Citation (search report)
See references of WO 0104668A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DE 19932082 A1 20010118; AU 5826800 A 20010130; AU 6690600 A 20010130; CA 2379077 A1 20010118; CN 1360681 A 20020724; EP 1194799 A1 20020410; TW 452666 B 20010901; WO 0104668 A1 20010118; WO 0104669 A1 20010118
DOCDB simple family (application)
DE 19932082 A 19990712; AU 5826800 A 20000710; AU 6690600 A 20000710; CA 2379077 A 20000710; CN 00810229 A 20000710; EP 0006518 W 20000710; EP 0006519 W 20000710; EP 00944023 A 20000710; TW 89113814 A 20000817