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公开(公告)号：DE60034969T2
公开(公告)日：2008-01-10
申请号：DE60034969
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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公开(公告)号：DE60034969D1
公开(公告)日：2007-07-05
申请号：DE60034969
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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公开(公告)号：DE60034825D1
公开(公告)日：2007-06-21
申请号：DE60034825
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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公开(公告)号：AT363122T
公开(公告)日：2007-06-15
申请号：AT03017932
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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公开(公告)号：AT362174T
公开(公告)日：2007-06-15
申请号：AT03017929
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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Patent Agency Ranking
公开(公告)号：DE60018735T2
公开(公告)日：2006-01-26
申请号：DE60018735
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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公开(公告)号：DE60042812D1
公开(公告)日：2009-10-08
申请号：DE60042812
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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公开(公告)号：DE60034826T2
公开(公告)日：2008-01-31
申请号：DE60034826
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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公开(公告)号：AT441183T
公开(公告)日：2009-09-15
申请号：AT01110301
申请日：2000-01-18
Applicant: KONICA MINOLTA OPTO INC
Inventor： ARAI NORIKAZU , KOJIMA TOSHIYUKI , KIRIKI TOSHIHIKO , OTA KOHEI , SAITO SHINICHIRO
Abstract: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source (11) for emitting first light flux having a first wavelength; a second light source (12) for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system (1) having an optical axis and a diffractive portion, and a photo detector (30); wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.
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公开(公告)号：DE60111999T2
公开(公告)日：2006-05-24
申请号：DE60111999
申请日：2001-05-17
Applicant: KONICA MINOLTA OPTO INC
Inventor： OTA KOHEI , ARAI NORIKAZU
IPC: G11B7/1374 , G02B3/08 , G02B5/18 , G02B13/00 , G11B7/00 , G11B7/125 , G11B7/135 , G11B7/1353
Abstract: An optical pickup apparatus for at least two kinds of optical information recording media, comprises a first light source; a second light source; an optical converging system; and a photo detector. An optical element of the optical converging system comprises a first region including an optical axis and a second region adjoining the first region and locating at the outside of the first region, the first region is a refractive surface and the second region is a diffractive surface. When a first light flux passes through the second region, the light amount of n-th order diffracted ray of the first light flux is larger than that of any other order diffracted ray of the first light flux, and when a second light flux passes through the second region of the optical element, the light amount of n-th order diffracted ray of the second light flux is larger than that of any other order diffracted ray of the second light flux, where n is an integer except 0.
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