-
公开(公告)号：JP2002365165A
公开(公告)日：2002-12-18
申请号：JP2001174471
申请日：2001-06-08
Applicant: SUMITOMO ELECTRIC INDUSTRIES
Inventor： SASAOKA HIDEYORI
Abstract: PROBLEM TO BE SOLVED: To provide a wavelength dispersion measuring device and a method capable of measuring wavelength dispersion in a short time, even if an optical fiber to be measured is short. SOLUTION: Continuous lights having the wavelengths of λ1 , λ2 outputted from light sources 111, 112 are coupled by a coupler 120, and then subjected to intensity modulation by an intensity modulator 130 and outputted. The outputted light signals having the wavelengths of λ1 , λ2 enter the optical fiber 9 to be measured and propagate through the optical fiber 9 to be measured. The light signals having the wavelengths of λ1 , λ2 emitted from the optical fiber 9 to be measured are branched by a branching filter 210. Then, the light signal having the wavelength of λ1 is received by a light receiver 221, and the light signal having the wavelength of λ2 is received by a light receiver 222, and the mutual phase difference of the intensity change between the light signals having the wavelengths of λ1 , λ2 received respectively by the light receivers 221, 222 are detected by a phase detector 240. The wavelength dispersion of the optical fiber 9 to be measured is determined by a computing unit 250 based on the detected phase difference.
-
公开(公告)号：JP2001201400A
公开(公告)日：2001-07-27
申请号：JP2000011582
申请日：2000-01-20
Applicant: MITSUBISHI ELECTRIC CORP
Inventor： TAKAHASHI SUSUMU
Abstract: PROBLEM TO BE SOLVED: To solve a problem that two image pickup devices are required to be used and that fine adjustment is required to comfort images in the two image pickup devices, in a conventional dual wavelength image pickup device. SOLUTION: Images of two wavelength ands in the same visibility angle are provided concurrently by one image pickup element, and picture elements of two wavelengths imagepick up the same point of a subject, by providing a dual wavelength separating means on the image pickup elements with detection picture elements of the two wavelengths alternately arranged in every one row or every one column, to image-focus the images of the dual wavelength in a position shifted by the one picture element.
-
-
公开(公告)号：JP2761643B2
公开(公告)日：1998-06-04
申请号：JP50539388
申请日：1988-08-17
Applicant: SUKANDEINABIAN EMITSUSHON TEKUNOROJII AB
-
公开(公告)号：JPH09292326A
公开(公告)日：1997-11-11
申请号：JP10486596
申请日：1996-04-25
Applicant: YUA TEC KK , TOTOKU ELECTRIC , SUZUKI HITOSHI , SASAKI HIROSHI
Inventor： SUZUKI HITOSHI , SASAKI HIROSHI
Abstract: PROBLEM TO BE SOLVED: To perform simply and at low cost the discrimination of the quality and the counting of the fine grains in suspension. SOLUTION: In this capillary-type light detecting sensor, fine-grain suspension (W) is made to pass through a capillary 1 having the inner diameter, wherein fine grains (S) can pass in the pattern aligned in approximately a single line. At the same time, red light Ka and orange light Kb are projected on the capillary 1 selectively in sequence at an interval of 25μs. Change in transmitted light K', caused by the respective absorption or scattering of the red light Ka and the orange light Kb caused by the fine grains (S) passing the capillary, is alternately observed. Thus, whether the fine rains are live cells or abiotic particles can be discriminated. This method is especially useful for monitoring the generation of 'water bloom' and the generation of red tide.
-
Patent Agency Ranking
-
公开(公告)号：JPH06341946A
公开(公告)日：1994-12-13
申请号：JP12967193
申请日：1993-05-31
Applicant: ANDO ELECTRIC , TOKYO GAS CO LTD
Inventor： ADACHI SHOJI , MORI TORU , SETO MINORU
Abstract: PURPOSE:To provide a gas detector which is stable and realizes high precision, enables the detection of gas having low concentration, and can detect several kinds of gases at a time. CONSTITUTION:Output of a light receiving device 5 which receives optical beam B1 is divided into the lights each having wavelength lambda0 to lambdan by a wavelength selection light divider 8, and reference light having wavelength lambda0 and each component of wavelength lambda1 to lambdan which is light absorbing wavelength of measured gas G1 to Gn are supplied to a wavelength synthesis device 11 via an optical fiber 7 and dummy fibers D1 to Dn, respectively, to synthesize wavelength. On this occasion, each component of wavelength lambda1 to lambdan is delayed by dummy fibers D1 to Dn by delay time t1 to tn. Next, levels of detection signals which correspond to each wavelength lambda0 to lambdan are detected sequentially, and presence and concentration of the measured gas G1 to Gn are judged at a time in accordance with each level in a signal processing circuit 9.
-
公开(公告)号：JPH0565013B2
公开(公告)日：1993-09-16
申请号：JP15486486
申请日：1986-07-01
Applicant: CHINO CORP
Inventor： HISHIKARI ISAO , SHIMIZU TAKAO
-
公开(公告)号：JPH0554052B2
公开(公告)日：1993-08-11
申请号：JP50304682
申请日：1982-09-20
Applicant: OWENS CORNING FIBERGLASS CORP
Inventor： MATSUKUGOWAN HOORU TOOMASU , RAITO REIMONDO EDOWAADO
-
公开(公告)号：JPH04329340A
公开(公告)日：1992-11-18
申请号：JP12645191
申请日：1991-05-01
Applicant: TOKYU KENSETSU KK
Inventor： MINAMI TETSUHISA , NISHIOKA SATORU
Abstract: PURPOSE:To measure activity by transmitting the image of a measured plant photographed at a remote location to a control room in real time. CONSTITUTION:A plant is photographed with two CCD cameras 1. The R-image data of the reflected light with the wavelength near 670nm are obtained by one CCD camera 1, and the IR-image data of the reflected light with the wavelength near 850nm are obtained by another CCD camera 1. The illuminance data are measured by an illuminance meter 2. The image data and illuminance data are transmitted by parabola antennas 7, 8 and inputted to a computer 11. The computer 11 calculates the spectral reflection factor ratio IR/R, and an image is processed and displayed on a monitor television 15.
-
-
-
-
-
-
-
-
-
Search Results
321
records
(took 0.029 seconds)
