-
公开(公告)号：DE68905384T2
公开(公告)日：1993-06-24
申请号：DE68905384
申请日：1989-05-25
Applicant: HAMAMATSU PHOTONICS KK
Inventor： AOSHIMA SHINICHIRO , URAKAMI TSUNEYUKI , TSUCHIYA YUTAKA
-
公开(公告)号：DE3877827T2
公开(公告)日：1993-05-19
申请号：DE3877827
申请日：1988-05-27
Applicant: HAMAMATSU PHOTONICS KK
Inventor： AOSHIMA SHINICHIRO , TSUCHIYA YUTAKA
Abstract: A voltage detector detects a voltage developing in a selected area of an object such as an integrated circuit by utilizing an elctro-optic material equipped in an optical probe. A change in refractive index of an electro-optic material which is caused by the voltage in the object, is detected as a change of polarization of a light beam passing through the elctro-optic material. In order to avoid undesired changes of polarization of the light beam when passing through optical fibers, a polarizer, beam splitters, and an analyzer are assembled together and connected to the electro-optic material to form a compact optical probe.
-
公开(公告)号：DE3877628T2
公开(公告)日：1993-05-13
申请号：DE3877628
申请日：1988-05-31
Applicant: HAMAMATSU PHOTONICS KK
Inventor： AOSHIMA SHINICHIRO , TSUCHIYA YUTAKA , TAKAHASHI HIRONORI
Abstract: A voltage detector detects a voltage developing in a selected area of an object such as an integrated circuit by utilizing an electro-optic material equipped in an optical probe. A change in refractive index of the electro-optic material which is caused by the voltage in the object, is detected as a change of polarization of a light beam passing through the electro-optic material. In order to accomplish precise detection of the voltage, a mirror in the form of a thin metal film or a multilayered dielectric film is disposed at the tip of electro-optic material and, at the same time, a transparent electrode is disposed on the side of electro-optic material opposite to the side where the mirror is disposed. As a result, lines of electric force produced by the voltage developing in the object are aligned in the electro-optic material parallel to the center line of the optical probe and the change in refractive index becomes uniform.
-
公开(公告)号：DE3873422T2
公开(公告)日：1993-01-28
申请号：DE3873422
申请日：1988-05-31
Applicant: HAMAMATSU PHOTONICS KK
Inventor： AOSHIMA SHINICHIRO , TSUCHIYA YUTAKA , TAKAHASHI HIRONORI
Abstract: A voltage detector detects a voltage developing in a selected area of an object such as an integrated circuit by utilizing an electro-optic material equipped in an optical probe. A change in refractive index of the first electro-optic material which is caused by the voltage in the object, is detected as a change of polarization of a light beam passing through the first electro-optic material. In order to compensating for a polarization change caused by the spontaneous birefringence, the first and second electro-optic materials made of the same material are disposed in such a manner that the first and second electro-optic materials and aligned along a light-traveling direction with their lengths in the light-traveling direction being substantially identical and with their optic axes being perpendicular to each other.
-
公开(公告)号：GB2212265B
公开(公告)日：1991-11-13
申请号：GB8825812
申请日：1988-11-04
Applicant: HAMAMATSU PHOTONICS KK
Inventor： TAKAHASHI HIRONORI , AOSHIMA SHINICHIRO , NAKAMURA TAKUYA , TSUCHIYA YUTAKA
-
Patent Agency Ranking
公开(公告)号：GB2210974B
公开(公告)日：1991-05-22
申请号：GB8823949
申请日：1988-10-12
Applicant: HAMAMATSU PHOTONICS KK
Inventor： TAKAHASHI HIRONORI , AOSHIMA SHINICHIRO , NAKAMURA TAKUYA , TSUCHIYA YUTAKA
-
公开(公告)号：GB2219903A
公开(公告)日：1989-12-20
申请号：GB8911524
申请日：1989-05-19
Applicant: HAMAMATSU PHOTONICS KK
Inventor： AOSHIMA SHINICHIRO , URAKAMI TSUNEYUKI , TSUCHIYA YUTAKA
IPC: G02B27/00 , G02F1/35 , H01S5/00 , H04B10/00 , H04B10/07 , H04B10/293 , H04B10/299
Abstract: A light waveform shaping apparatus comprises; a beam splitting means for branching an input optical signal into two optical signals; a photoelectric converter for converting one of the two branched optical signals into an electrical signal; an optical amplifier whose gain is adjustable by a controlling electrical signal, for amplifying an optical signal; an input optical path for introducing the other branched optical signal to the optical amplifier; and an electrical circuit for introducing the electrical signal from the photoelectric converter to the optical amplifier; wherein the optical and controlling electrical signals are supplied to the optical amplifier at a predetermined timing of generally coincident arrival.
-
公开(公告)号：EP0798825A3
公开(公告)日：1998-07-22
申请号：EP97302040
申请日：1997-03-25
Applicant: HAMAMATSU PHOTONICS KK
Inventor： AOSHIMA SHINICHIRO , ITO HARUYASU , TSUCHIYA YUTAKA
CPC classification number: H01S3/1112 , H01S3/0811 , H01S3/0816 , H01S3/09415 , H01S3/102 , H01S3/105
Abstract: An ultrashort pulse laser apparatus of the this invention includes (1) a laser medium, (2) a laser resonator which stores the laser medium and externally extracts a laser beam, and (3) an excitation source for outputting an excitation energy to the laser resonator to excite the laser medium. The laser resonator includes (i) a plurality of resonant mirrors disposed on both sides of the laser medium to form a resonant optical path, and (ii) a phase dispersion compensation unit which includes two optical members respectively arranged on two light input/output surface sides of the laser medium on the resonant optical path and compensates phase dispersion of light in the resonant optical path. That is, the laser medium is disposed in the optical path between the two optical members of the phase dispersion compensation unit. With this arrangement, even when the laser medium is arranged almost at the center of the laser resonator to stabilize mode locking, the cavity length of the resonant optical path can be reduced. Therefore, the repetition frequency of laser pulses can be increased, and simultaneously, size reduction of the laser apparatus itself can be achieved.
-
公开(公告)号：DE69721888D1
公开(公告)日：2003-06-18
申请号：DE69721888
申请日：1997-03-25
Applicant: HAMAMATSU PHOTONICS KK
Inventor： AOSHIMA SHINICHIRO , ITO HARUYASU , TSUCHIYA YUTAKA
Abstract: An ultrashort pulse laser apparatus of the this invention includes (1) a laser medium, (2) a laser resonator which stores the laser medium and externally extracts a laser beam, and (3) an excitation source for outputting an excitation energy to the laser resonator to excite the laser medium. The laser resonator includes (i) a plurality of resonant mirrors disposed on both sides of the laser medium to form a resonant optical path, and (ii) a phase dispersion compensation unit which includes two optical members respectively arranged on two light input/output surface sides of the laser medium on the resonant optical path and compensates phase dispersion of light in the resonant optical path. That is, the laser medium is disposed in the optical path between the two optical members of the phase dispersion compensation unit. With this arrangement, even when the laser medium is arranged almost at the center of the laser resonator to stabilize mode locking, the cavity length of the resonant optical path can be reduced. Therefore, the repetition frequency of laser pulses can be increased, and simultaneously, size reduction of the laser apparatus itself can be achieved.
-
公开(公告)号：AU6596300A
公开(公告)日：2002-03-04
申请号：AU6596300
申请日：2000-08-18
Applicant: HAMAMATSU PHOTONICS KK
Inventor： FUJIMOTO MASATOSHI , AOSHIMA SHINICHIRO , HOSODA MAKOTO , TSUCHIYA YUTAKA
IPC: G01N21/64
Abstract: Light from a pulse light source 11 is split by an optical splitter 12 into two light beams, and one is made to be incident via a gate optical system 2 on a detection medium 6 as a gate pulse used in observation of fluorescence. Moreover, the other is made to be incident via an excitation optical system 3 on a substance undergoing measurement 4 as an excitation pulse used in producing fluorescence, and the fluorescence from the substance undergoing measurement 4 is irradiated via a fluorescence optical system 5 onto the detection medium 6. Here, a fluorescence component that passes through a region of the detection medium 6 where a change in refractive index has been induced through a nonlinear optical effect produced in the detection medium 6 by the gate pulse is observed as a fluorescence image by utilizing a change in polarization state; by observing the change in position of the fluorescence image while correlating with the change over time in the fluorescence, a fluorescence lifetime measuring apparatus is realized with which the change over time in the fluorescence, inparticular the fluorescence lifetime, can be measured efficiently with high temporal resolution.
-
-
-
-
-
-
-
-
-
Search Results
295
records
(took 0.022 seconds)
