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Article: Study of modular transfer function-based optical low-pass filter evaluation model and experiment

TitleStudy of modular transfer function-based optical low-pass filter evaluation model and experiment
Authors
KeywordsEvaluation Function
Modulation Transfer Function
Optical Low Pass Filter
Spatial Frequency
Issue Date2008
PublisherKexue Chubanshe. The Journal's web site is located at http://g203.iphy.ac.cn/wulixb/
Citation
Wuli Xuebao/Acta Physica Sinica, 2008, v. 57 n. 5, p. 2854-2859 How to Cite?
AbstractTo evaluate the performance of optical low pass filter (OLPF) accurately, a new 2D digital imaging system model including an OLPF was created for the first time using the modular transfer function (MTF). An evaluation function was also established based on this model. To manifest the model and its evaluation, three typical OLPFs were studied. The results show that the A value of each filter undergoes a slow and slight decrease and then rapidly increases when the ideal optical system cutoff frequency is increased. The optical system embedded with the 2-chip-4-point type OLPF created a better image than those with the other two OLPF's when the F number is greater than 4.4; whereas the OLPF of 3-chip-8-point type worked best when the F number is lower than 4.4. When the F number of the optical system is 2.8, namely, with a spatial cutoff frequency of 649 lp/mm, the filter of 3-chip-8-point type performs better than that of the 2-chip-4-point and 3-chip-4-point types. The A value of the first filter is 28.3% and 37.5%, lower than that of the other two filters, respectively. That is, the filter performance is 28.3% and 37.5% higher. Finally, spatial frequency test shows that the moire fringe and false colors can be seen in the last two pictures, while in the first, these effects are well eliminated. The theoretical calculations agree with the experimental results.
Persistent Identifierhttp://hdl.handle.net/10722/90986
ISSN
2015 Impact Factor: 0.677
2015 SCImago Journal Rankings: 0.156

 

DC FieldValueLanguage
dc.contributor.authorQi, X-Jen_HK
dc.contributor.authorLin, Ben_HK
dc.contributor.authorCao, X-Qen_HK
dc.contributor.authorChen, Y-Qen_HK
dc.date.accessioned2010-09-17T10:11:20Z-
dc.date.available2010-09-17T10:11:20Z-
dc.date.issued2008en_HK
dc.identifier.citationWuli Xuebao/Acta Physica Sinica, 2008, v. 57 n. 5, p. 2854-2859en_HK
dc.identifier.issn1000-3290en_HK
dc.identifier.urihttp://hdl.handle.net/10722/90986-
dc.description.abstractTo evaluate the performance of optical low pass filter (OLPF) accurately, a new 2D digital imaging system model including an OLPF was created for the first time using the modular transfer function (MTF). An evaluation function was also established based on this model. To manifest the model and its evaluation, three typical OLPFs were studied. The results show that the A value of each filter undergoes a slow and slight decrease and then rapidly increases when the ideal optical system cutoff frequency is increased. The optical system embedded with the 2-chip-4-point type OLPF created a better image than those with the other two OLPF's when the F number is greater than 4.4; whereas the OLPF of 3-chip-8-point type worked best when the F number is lower than 4.4. When the F number of the optical system is 2.8, namely, with a spatial cutoff frequency of 649 lp/mm, the filter of 3-chip-8-point type performs better than that of the 2-chip-4-point and 3-chip-4-point types. The A value of the first filter is 28.3% and 37.5%, lower than that of the other two filters, respectively. That is, the filter performance is 28.3% and 37.5% higher. Finally, spatial frequency test shows that the moire fringe and false colors can be seen in the last two pictures, while in the first, these effects are well eliminated. The theoretical calculations agree with the experimental results.en_HK
dc.languageengen_HK
dc.publisherKexue Chubanshe. The Journal's web site is located at http://g203.iphy.ac.cn/wulixb/en_HK
dc.relation.ispartofWuli Xuebao/Acta Physica Sinicaen_HK
dc.subjectEvaluation Functionen_HK
dc.subjectModulation Transfer Functionen_HK
dc.subjectOptical Low Pass Filteren_HK
dc.subjectSpatial Frequencyen_HK
dc.titleStudy of modular transfer function-based optical low-pass filter evaluation model and experimenten_HK
dc.typeArticleen_HK
dc.identifier.emailLin, B:blin@hku.hken_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-44849130452en_HK
dc.identifier.volume57en_HK
dc.identifier.issue5en_HK
dc.identifier.spage2854en_HK
dc.identifier.epage2859en_HK

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