• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method for the measurement of the difference in the optical properties dependent on the light direction of two samples (1, 2), in which method one or several sources of light (3 to 6) as well as one light detector (7) are used. According to the invention, both of the samples (1, 2) are illuminated simultaneously and from both samples (1, 2) the light is passed simultaneously to the light detector (7). The lights to be measured from the samples (1, 2) have different directions in relation to the sample. The directions of the lights to be measured from the sample (1, 2) are alternated with each other at an appropriate frequency, such as a frequency within the range of 1 c/s to 10,000 c/s. The AC signal given by the light detector (7) is used as a measure of the difference in some optical property dependent on the direction of light between the samples, such as, e.g., as a measure of the turbidity of a solid, liquid or gaseous sample, or as a measure of the reflectivity or transparency of a face or film sample as a function of the direction of light.
    公开号:SU1384218A3
    申请号:SU843706912
    申请日:1984-02-27
    公开日:1988-03-23
    发明作者:Харюнмаа Ханну
    申请人:Лабсистемз Ой (Фирма)；
    IPC主号:
    专利说明:

     CM
    FIG g
    The invention relates to optical measurements and can be used to measure the difference in the optical properties of two samples.
    - The purpose of the invention is to increase the measurement accuracy.
    Figure 1 shows an example implementation of a method for measuring skin irregularities associated with local skin tone due to allergic reactions; Fig. 2 illustrates an exemplary method for measuring the difference in turbidity of two liquid samples.
    The investigated samples (skin areas) 1 and 2 (Fig. 1), one of which is a reference, are illuminated by sources of 3-6 light, for which four light emitting diodes (LEDs) of the same color are used. Sources 3 and 4 of light illuminate the skin perpendicularly, and 5 and 6 - obliquely. As a light receiver, one phototransistor is used, 7, which is supplied with light rays reflected from two test areas of skin 1 and 2. Control element 8 operates in such a way that each test area is illuminated with one LED perpendicularly and one LED obliquely, so that that when one LED illuminates one test area perpendicularly, the other test area is illuminated by the LED obliquely. The alternating current signal from the phototransistor 7 is fed to the amplifier 9, slider ml is sent to the slider 10 and measured by the meter 11.
    The reflection coefficients of the studied areas with perpendicular light rays are denoted D and B
    with oblique s. and s
     2The signal R of the alternating current of the receiver of the light emission is proportional to the light-j of the light, en equality
    It is possible that with a sample, the samples that have samples will be sampled about the properties obtained from that one


    (D ,.
    S,) - (D,
    S,
    or
    (S) - (D2-Sg)
    Using the notation
    N. D, - S.
    D, HI3
    H
    3
    H values
    2
    and H
    determine the scheme
    1.0
    15
    20
    25
    thirty
    five
    0
    j light
    0
    five
    We are the directions of reflection of rays from samples. If the patterns of the directions of reflection of the rays from the samples are different, then a signal is generated that is greater, the greater the difference in the roughness of the surfaces.
    In the exemplary embodiment of Fig. 2, two liquid samples are tested and turbidity is measured. The device is thus a differential nephelometer. A beam of light from one, two or a few light sources is directed to the samples. A part of the light beam falls on the light receiver, in relation to the alternating current signal of which the method corresponds to that described. I
    When two or four light sources are used, the balance adjustment can be carried out automatically using a second light receiver. At this second receiver, both light beams of different directions are incident alternately with the corresponding frequency from one sample at each time point, and the resulting AC signal is used to adjust the ratio between the light intensities of the light sources, so that the AC signal becomes equal. to zero.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method of comparing the optical properties of two samples, consisting in directing light rays to samples and measuring reflected from them, in that, in order to improve accuracy, light rays having different directions relative to the samples are directed to the samples, light reflected from the samples is simultaneously recorded by one receiver radiation, while the directions of the measured light rays alternate with a frequency of 1–10000 Hz and, by an alternating current signal of the light receiver, judge the difference in optical CTB samples.
    CM
    INS
    类似技术:
    公开号 | 公开日 | 专利标题
    CA1301470C|1992-05-26|Spectrometers
    SU1384218A3|1988-03-23|Method of comparing optical properties of two specimens
    FI78355C|1989-07-10|METHOD FOER MAETNING AV GLANS OCH APPARATUR FOER TILLAEMPNING AV METODEN.
    JPS58191907A|1983-11-09|Method for measuring extent of movement
    FI72391B|1987-01-30|PROCEDURE FOR THE MAINTENANCE OF AVAILABILITY IN THE PREMISES
    EP0132370A2|1985-01-30|Apparatus for measuring optical transmission factor
    SU1125514A1|1984-11-23|Refractometer-calorimeter
    SU654853A1|1979-03-30|Photometric contact-free method of measuring non-transparent specimen roughness height
    SU1642334A1|1991-04-15|Method of material refractive index determination
    RU2032166C1|1995-03-27|Method of determination of refractive index of wedge-shaped articles
    SU1728654A1|1992-04-23|Method of determination of position of workpiece with hole
    RU1800427C|1993-03-07|Method for atmosphere inverse scattering index determining
    RU1770848C|1992-10-23|Method of determining refraction index of wedge-shaped specimens
    RU2033603C1|1995-04-20|Method of measurement of reflection factor
    SU1647242A1|1991-05-07|Non-contact optical method for surface roughness rms height measurement
    SU1054743A1|1983-11-15|Device for determining range of dimensions of aerosol particles and concentration of aerosol
    SU1485070A1|1989-06-07|Method and apparatus for determining average dimensions and concentration of light diffusing particles
    SU1657948A1|1991-06-23|Diffraction method of measurement of angular translation of object
    SU940018A1|1982-06-30|Two-beam photometer
    US5113082A|1992-05-12|Electro-optical instrument with self-contained photometer
    Diprose et al.1978|An automatic interference refractometer
    SU1504505A1|1989-08-30|Method of determining roughness parameters of surface of articles
    RU2172945C2|2001-08-27|Gear measuring transmission coefficient of optical plate
    SU872959A1|1981-10-15|Touch-free photometric method of measuring transparent sample roughness height
    SU1425438A1|1988-09-23|Method of measuring angular position of part
    同族专利:
    公开号 | 公开日
    EP0112376A1|1984-07-04|
    FI822306A0|1982-06-29|
    DK85384D0|1984-02-21|
    DK85384A|1984-02-21|
    IT8367697D0|1983-06-27|
    FI65332C|1984-04-10|
    FI65332B|1983-12-30|
    US4555178A|1985-11-26|
    DE3367027D1|1986-11-20|
    EP0112376B1|1986-10-15|
    WO1984000213A1|1984-01-19|
    JPS59501176A|1984-07-05|
    IT1159429B|1987-02-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE489392C|1930-01-16|Zeiss Carl Fa|Device intended to be connected in front of a photometer|
    GB796661A|1955-06-02|1958-06-18|Zeiss Stiftung|Optical arrangement for comparing the transmission ratio of a sample with a standard|
    US3892492A|1972-10-16|1975-07-01|Loepfe Ag Geb|Optoelectrical apparatus with directional light sources for detecting reflection behaviour of an object|
    SU690372A1|1975-12-26|1979-10-05|Предприятие П/Я Р-6900|Nephelometer|
    US4120592A|1976-03-24|1978-10-17|E. I. Du Pont De Nemours And Company|Multiplex optical analyzer apparatus|JPH0789083B2|1984-04-27|1995-09-27|名古屋大学長|Asymmetric Spectral Distribution Measurement System by New Homodyne Method Using Angle Mirror|
    US4750140A|1984-11-30|1988-06-07|Kawasaki Steel Corporation|Method of and apparatus for determining glossiness of surface of a body|
    IT1237711B|1989-12-20|1993-06-15|Fiat Auto Spa|PROCEDURE AND DEVICE FOR THE OBJECTIVE EVALUATION OF THE HAIR TISSUE FELTING, IN PARTICULAR VELVETS FOR THE COVERING OF VEHICLE SEATS|
    US4997497A|1990-04-05|1991-03-05|Rockwell International Corporation|Castable smoke-producing pyrotechnic compositions|
    US5293210A|1992-04-24|1994-03-08|Becton, Dickinson And Company|Detection of bacteria in blood culture bottles by time-resolved light scattering and absorption measurement|
    US5204538A|1992-05-18|1993-04-20|Xerox Corporation|Densitometer for an electrophotographic printer using focused and unfocused reflecting beams|
    DE60017930D1|1999-10-18|2005-03-10|Siemens Plc Oldbury|DEVICE FOR MEASURING THE COLOR AND TURNING OF WATER BY MEANS OF A SINGLE DETECTOR|
    JP2016120535A|2014-12-24|2016-07-07|株式会社ディスコ|Processing apparatus|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI822306A|FI65332C|1982-06-29|1982-06-29|FARING EQUIPMENT FOR THE MAINTENANCE OF THE TV PROVIDING AVAILABILITY OF OPTICAL CAPACITY EQUIPMENT FOR RELEASE|
    [返回顶部]