Video CD playback board is a built-in card for a conventional audio CD player that allows users to play back high quality full-motion video and stereo sound. The board is made up of the CL480 MPEG-1 audio/video decoder, the Bt851 NTSC/PAL video encoder and the CS4331 stereo D/A converter. By connecting the board to the DSP's serial data output of a audio CD player. Video CD discs can be played back by using the Subcode PQ search mode of the CD player. Audio CD players will simply evolve into Video CD player.
{"title":"Video CD playback board for audio CD player","authors":"H. Gao, Liren Zhao, Duanyi Xu, T. J. Connors","doi":"10.1117/12.248711","DOIUrl":"https://doi.org/10.1117/12.248711","url":null,"abstract":"Video CD playback board is a built-in card for a conventional audio CD player that allows users to play back high quality full-motion video and stereo sound. The board is made up of the CL480 MPEG-1 audio/video decoder, the Bt851 NTSC/PAL video encoder and the CS4331 stereo D/A converter. By connecting the board to the DSP's serial data output of a audio CD player. Video CD discs can be played back by using the Subcode PQ search mode of the CD player. Audio CD players will simply evolve into Video CD player.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123537748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper describes the application of a frequency-locked servo system in the control system of a laser cutting machine of optical disks for servo grooves and pre-formatted information. The stability of the angular velocity of the spindle is up to 5 X 10-6 and the accuracy of the track pitch is 1.6 micrometers +/- 0.03 micrometers .
{"title":"Application of frequency-locked servo system in laser cutting machine of optical-disks","authors":"Yan Ling, Yuzhang Liu","doi":"10.1117/12.150657","DOIUrl":"https://doi.org/10.1117/12.150657","url":null,"abstract":"This paper describes the application of a frequency-locked servo system in the control system of a laser cutting machine of optical disks for servo grooves and pre-formatted information. The stability of the angular velocity of the spindle is up to 5 X 10-6 and the accuracy of the track pitch is 1.6 micrometers +/- 0.03 micrometers .","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116667514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The laser-induced crystallization and annealing-induced crystallization of amorphous TbFeCo magneto-optical films have been investigated by TEM. The film was prepared by FTMS system. It was found that the crystallization occurred when a powerful laser irradiated the medium. The size was related to the irradiating power and time. The area took the shape of circularity. The electron diffraction pattern showed that there was a clear boundary between the amorphous and the crystallized regions. On the other hand, under annealing the crystallization started at 300 degree(s)C. The HREM of the film annealed at 400 degree(s)C showed the crystallization occurred at different areas simultaneously. There was no clear boundary between the amorphous and the crystallized areas. The lattice image of the film indicated that there was not any compositional modulation in the film.
{"title":"Study on crystallization of TbFeCo films","authors":"Hui Qin, M. Li","doi":"10.1117/12.150674","DOIUrl":"https://doi.org/10.1117/12.150674","url":null,"abstract":"The laser-induced crystallization and annealing-induced crystallization of amorphous TbFeCo magneto-optical films have been investigated by TEM. The film was prepared by FTMS system. It was found that the crystallization occurred when a powerful laser irradiated the medium. The size was related to the irradiating power and time. The area took the shape of circularity. The electron diffraction pattern showed that there was a clear boundary between the amorphous and the crystallized regions. On the other hand, under annealing the crystallization started at 300 degree(s)C. The HREM of the film annealed at 400 degree(s)C showed the crystallization occurred at different areas simultaneously. There was no clear boundary between the amorphous and the crystallized areas. The lattice image of the film indicated that there was not any compositional modulation in the film.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125752836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aging properties of TbFeCo film have been investigated with TEM, XPS, and AES. It was found that the absorption, migration, and combination of oxygen are considerable factors. Lower density boundary regions of the columnar microstructure accelerate the diffusion of oxygen. A model about oxidation is provided to explain the layered structure in the film.
{"title":"Effect of oxygen on aging of TbFeCo films","authors":"Hui Qin, Dimin Luo, Min Lu","doi":"10.1117/12.150675","DOIUrl":"https://doi.org/10.1117/12.150675","url":null,"abstract":"The aging properties of TbFeCo film have been investigated with TEM, XPS, and AES. It was found that the absorption, migration, and combination of oxygen are considerable factors. Lower density boundary regions of the columnar microstructure accelerate the diffusion of oxygen. A model about oxidation is provided to explain the layered structure in the film.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127649932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The recording domain sizes of amorphous DyFeCo thin films are compared with those of films with addition of Nd element. It is shown that NdDyFeCo films possess smaller domain sizes than DyFeCo films do under the same recording conditions. These results may be explained by the temperature dependence of coercivity of the thin films. The addition of Nd element to DyFeCo films plays a role of increasing the coercivity of thin films at high temperature, which has influence on the recording domain sizes.
{"title":"Magneto-optic recording properties of amorphous DyFeCo thin films with addition of Nd element","authors":"Yongshi Hu, P. Zhu, Zhong Xu, G. Lin, Z. Lee","doi":"10.1117/12.150673","DOIUrl":"https://doi.org/10.1117/12.150673","url":null,"abstract":"The recording domain sizes of amorphous DyFeCo thin films are compared with those of films with addition of Nd element. It is shown that NdDyFeCo films possess smaller domain sizes than DyFeCo films do under the same recording conditions. These results may be explained by the temperature dependence of coercivity of the thin films. The addition of Nd element to DyFeCo films plays a role of increasing the coercivity of thin films at high temperature, which has influence on the recording domain sizes.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131317208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Shen, Mingjuan Zhang, T. Du, Weizhu Zhang, B. Cheng
Cu-doped polycrystalline BiGa:HoIG films were prepared on glass substrate by rf sputtering and post annealing. The addition of 1.8% Cu was very effective to increase the coercivity from 130 Oe to more than 10 kOe, whereas the Faraday rotation angle does not decrease.
{"title":"Magnetic and magneto-optical properties of BiGa:HoIG films","authors":"D. Shen, Mingjuan Zhang, T. Du, Weizhu Zhang, B. Cheng","doi":"10.1117/12.150643","DOIUrl":"https://doi.org/10.1117/12.150643","url":null,"abstract":"Cu-doped polycrystalline BiGa:HoIG films were prepared on glass substrate by rf sputtering and post annealing. The addition of 1.8% Cu was very effective to increase the coercivity from 130 Oe to more than 10 kOe, whereas the Faraday rotation angle does not decrease.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116637361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cu-doped Bi, Ga:DyIG and Bi, Al:DyIG films on glass substrates have been prepared by pyrolysis method, and the coercive force (Hc) and the compensation temperature (Tcomp) were investigated. For Cu-doped Bi, Ga:DyIG and Bi, Al:DyIG films, high Hc values of 13 kOe and 7 kOe were obtained, respectively. The extremely high Hc values were attributed to Cu entering the lattice sites.
{"title":"Study of coercive force and compensation temperature in Cu-doped Bi, Ga:DyIG, and Bi, Al:DyIg films for magneto-optical recording","authors":"Yongzong Zhou, D. Shen, F. Gan","doi":"10.1117/12.150677","DOIUrl":"https://doi.org/10.1117/12.150677","url":null,"abstract":"Cu-doped Bi, Ga:DyIG and Bi, Al:DyIG films on glass substrates have been prepared by pyrolysis method, and the coercive force (Hc) and the compensation temperature (Tcomp) were investigated. For Cu-doped Bi, Ga:DyIG and Bi, Al:DyIG films, high Hc values of 13 kOe and 7 kOe were obtained, respectively. The extremely high Hc values were attributed to Cu entering the lattice sites.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115749595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Using a novel organic dye-phthalocyanine compound, organic dye media for write-once optical recording were obtained by vacuum sublimation. The new media exhibited satisfactory optical recording characteristics and provided write-in power < 8 mW, write-in pulse duration equals 150 ns, the signal contrast > 20%, and the ratio of carrier to noise > 45%.
{"title":"Organic dye write-once optical recording media","authors":"D. Gu, Jian P. Zhou, F. Gan","doi":"10.1117/12.150650","DOIUrl":"https://doi.org/10.1117/12.150650","url":null,"abstract":"Using a novel organic dye-phthalocyanine compound, organic dye media for write-once optical recording were obtained by vacuum sublimation. The new media exhibited satisfactory optical recording characteristics and provided write-in power < 8 mW, write-in pulse duration equals 150 ns, the signal contrast > 20%, and the ratio of carrier to noise > 45%.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121027760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A fully separated optical head means that the carrier and the actuator are separated completely. It causes the mass of the carrier to be less than 10 grams, or even less. It can increase the access rate greatly and avoid the cross interference between two stage seekings.
{"title":"Fully separated optical head","authors":"Jing Pei, Duanyi Xu, Longfa Pan, Hao Yuan","doi":"10.1117/12.150661","DOIUrl":"https://doi.org/10.1117/12.150661","url":null,"abstract":"A fully separated optical head means that the carrier and the actuator are separated completely. It causes the mass of the carrier to be less than 10 grams, or even less. It can increase the access rate greatly and avoid the cross interference between two stage seekings.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128133457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A key problem in the fast seeking process of optical disk drive is to measure the radial velocity of light spot on disk quickly and accurately. This paper proposes a measuring method with high accuracy and simple circuit design.
{"title":"Improved method of velocity measurement in fast seeking","authors":"Maotai Hu, Chunyi Wu","doi":"10.1117/12.150667","DOIUrl":"https://doi.org/10.1117/12.150667","url":null,"abstract":"A key problem in the fast seeking process of optical disk drive is to measure the radial velocity of light spot on disk quickly and accurately. This paper proposes a measuring method with high accuracy and simple circuit design.","PeriodicalId":212484,"journal":{"name":"Optical Storage and Information Data Storage","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129280524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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