中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

34 records (took 0.022 seconds)

    LINEARITY AND CORRECTION METHOD OF PHOTOMETRIC ANALYSIS METER
    25.
    发明专利
    LINEARITY AND CORRECTION METHOD OF PHOTOMETRIC ANALYSIS METER 失效

    公开(公告)号：JPS55163420A

    公开(公告)日：1980-12-19

    申请号：JP6835379

    申请日：1979-05-30

    Applicant: HORIBA LTD

    Inventor： IKEDA TOSHIAKI

    IPC: G01N21/27 ,  G01J1/30 ,  G01J3/02 ,  G01J3/42 ,  G01N21/31

    Abstract: PURPOSE:To ensure continuous measurement stably and accurately for a long time through control of the light quantity of the light source by changing the light source so that the DC signal provides a fixed value. CONSTITUTION:The zero sample Z and the measuring sample S alternately flow through the measuring cell 3 at a fixed cycle. The DC one of the signals outputted from pre-amplifier 5 is applied to the comparator 16 through the low pass filter 13 to be compared with the fixed reference voltage 17. Based on the results, the light power source P or the amplification level of the amplifier 5 is controlled.

    PHOTOMETRIC ANALYZER OF CELLLLENGTH MODULATION SYSTEM
    29.
    发明专利
    PHOTOMETRIC ANALYZER OF CELLLLENGTH MODULATION SYSTEM 失效

    公开(公告)号：JPS56111446A

    公开(公告)日：1981-09-03

    申请号：JP1402780

    申请日：1980-02-07

    Applicant: HORIBA LTD

    Inventor： TANEI FUMIO ,  IKEDA TOSHIAKI

    IPC: G01N21/03 ,  G01N21/59

    Abstract: PURPOSE:To improve a measurement precision with simple constitution by arranging a light source, sample cell and detector with prescribed optical situation and by providing a measured-wavelength transmissive material in the optical path of the sample cell so said material is free to enter and exit. CONSTITUTION:When the length between cell windows 3a and 3b of sample cell 3 is denoted as l1, moving measured-wavelength transmissive material 4 of diameter l2 into and out of optical path P can change the cell length to long and short length l1 and l1-l2 respectively, and consequently a measurement of wave-length modulation is feasible. Namely, if the transmitted light when transmissive material 4 exits is denoted asI1,I1is expressed by (1) and when asI2,I2is expressed by (2). The quotient between formulas 1 and 2, when denoted byI, is expressed by (3) andI or its logarithmically converted value is extracted as an output signal, so thatI0will not be included which is influenced by the deterioration of the light source and detector and the stain of the cell window. Therefore, concentration (C) can be measured with high precision through the simple constitution (in the formula,I0is incident light and (K) is the coefficient of light absorption).

    CONTINUOUS PHOTOMETRIC ANALYZER
    30.
    发明专利
    CONTINUOUS PHOTOMETRIC ANALYZER 失效

    公开(公告)号：JPS5610233A

    公开(公告)日：1981-02-02

    申请号：JP8728379

    申请日：1979-07-07

    Applicant: HORIBA LTD

    Inventor： TANEI FUMIO ,  IKEDA TOSHIAKI

    IPC: G01N21/59 ,  G01N21/03

    Abstract: PURPOSE:To simplify mechanism and also to obtain measurement continuously by a method wherein a sample is arranged outside a cylinder, and a cell length is changed by turning the cylinder in the sample. CONSTITUTION:Bottomed cylinders 1A, 1B circular in horizontal section which are arranged and soaked oppositely each other in a sample 2 to measure are formed by a measuring wave transmissive material. A light source 3 is inserted in one cylinder 1A at an eccentric position, a detector 4 is inserted in the other cylinder 1B at an eccentric position, a light from a light source 3 is applied to the sample to measure continuously without interruption, a measured light passing the sample 2 to measure is received continuously, and an electric signal according to the quantity of light received is outputted. A cell length is changed by both the cylinders 1A, 1B rotating around the light source 3 and the detector 4.

Patent Agency Ranking