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    Improvements in Automatic Control of Strain Modulators.
    11.
    发明专利
    Improvements in Automatic Control of Strain Modulators. 未知

    公开(公告)号：GB1182190A

    公开(公告)日：1970-02-25

    申请号：GB3456367

    申请日：1967-07-27

    Applicant: CARY INSTRUMENTS

    IPC: G02F1/01

    Abstract: 1,182,190. Light modulators. GARY INSTRUMENTS. 27 July, 1967 [13 April, 1967], No. 34563/67. Heading H4F. The subject matter of this Specification is substantially the same as that described in Specification 1,182,189 but the apparatus for modulating the ellipticity of polarization of a monochromatic light beam whose wavelength varies, so that the ellipticity varies cyclically and so that the amplitude of the cyclical variation of the ellipticity is maintained at an optimum level, which includes a modulator operable on a linearly polarized light beam to produce at least one emergent beam having cyclically varying ellipticity, and means operable upon one such emergent beam for deriving a modified beam whose intensity varies cyclically as a function of the cyclically varying ellipticity, is such that the modulator is only controlled by the modified light beam to maintain the amplitude of the cyclical variation of the ellipticity at the predetermined optimum level i.e. the modulator does not include a piezoelectric sensor and thus does not oscillate in a selfresonant manner.

    RAMAN SPECTROSCOPY
    13.
    发明专利
    RAMAN SPECTROSCOPY 未知

    公开(公告)号：GB1310919A

    公开(公告)日：1973-03-21

    申请号：GB2752670

    申请日：1970-06-08

    Applicant: CARY INSTRUMENTS

    IPC: G01N21/65 ,  G01J3/44

    Abstract: 1310919 Laser raman spectroscopy CARY INDUSTRIES 8 June 1970 [11 June 1969] 27526/70 Heading G2J A laser 18 passes a beam 19 through an optical system 20 which serves to focus the beam on one conjugate image point 13 of a concave mirror 11 which passes the beam to a conjugate image point 12 of another concave mirror 10 so that the beam repeatedly passes through the image points 12, 13, situated in, on, or outside a sample cell 17 thus producing Raman radiation 16, directed by an optical system 24, to a monochromator 23 having a photodetector 25 receiving dispersed radiation and passing it to an amplifier 27 and recorder 28. The image points 12, 13 may be adjusted in relation to the cell 17 by moving the mirror 11, the cell, the mirror 10 and laser 18 or the mirror 11 relatively to the laser and cell unit. The cell 40 Fig. 3, may be so shaped that the image points 42, 50 pass through the cell with little or no deviation. (For Figures see next page)

    15.
    发明专利
    未知

    公开(公告)号：DE1773069A1

    公开(公告)日：1971-08-26

    申请号：DE1773069

    申请日：1968-03-28

    Applicant: CARY INSTRUMENTS

    Inventor： H CARY HENRY

    IPC: G01J5/38 ,  G01J5/44

    Abstract: 1,196,703. Infrared detection and sample analysis. CARY INSTRUMENTS. March 29, 1968 [March 29, 1967], No. 15332/68. Heading G1A. In an arrangement for measuring infrared radiation the radiation is applied to a foil supported under tension and resulting changes in tension are measured. The foil 10 Fig. 1 is clamped in clamps 14, 15 and stretched over rollers in front of a window 47, it may be vibrated electrostatically by an electrode 21 and the vibration may develop a signal by way of a capacitive electrode 22. The foil may be vibrated at its natural frequency or otherwise and the detection may be by measuring changes in signal frequency or amplitude. The foil may be enclosed in an evacuated or partly evacuated chamber and the input radiation may be chopped. The clamp spacing may be determined by a rod 13 around which is wound an electrical heater wire 20 whereby feed back is used to maintain constant the time-average value of the measured characteristic. The foil may be of rectangular or other shape, have a high co-efficient of thermal expansion, low thermal conductivity, low heat capacity and high Young's modulus. A nickel alloy foil carrying an absorbing layer of nickel black is exemplified and dimensions are given. Circuits illustrated include A. C. and D. C. bias on the drive electrode, H. F. A. C. bias on the pick up electrode, a field effect transistor, and a common drive and pick-up electrode. The detector is illustrated in use in a system investigating the spectral characteristics of a sample, the infrared beam being directed to a detector by rotating mirrors alternately through a sample and direct, and the ratio of the respective pulse heights being measured. The path includes an adjustable monochromator and the displayed or recorded ration is correlated with the selected wavelength. Alternatively the direct path may include an optical wedge which may be driven to equalise the pulse heights.

    17.
    发明专利
    未知

    公开(公告)号：DE1766145B1

    公开(公告)日：1971-01-21

    申请号：DE1766145

    申请日：1968-04-09

    Applicant: CARY INSTRUMENTS

    Inventor： A HOLLY JOHN

    IPC: G01R19/00 ,  G01R19/22 ,  H03K9/02 ,  G01R19/04

    Abstract: 1,227,627. Measurement of pulse signals. CARY INSTRUMENTS. April 24, 1968 [April 26, 1967], No. 19462/68. Heading G1U. The mean magnitude of periodic pulses 12, Fig. 3, subject to noise and jitter and superimposed on a quiescent level 13 which is relatively free from noise is measured by passing the pulse train through a D. C. blocking circuit 15, Fig. 1, and sampling the output during the intervals #T 2 between pulses. The sampler output may be filtered to remove ripple, amplified and applied to an indicator, recorder or process-control system. The pulses need not be rectangular. The blocking circuit may comprise an RC network or a transformer and the sampler may utilize an FET. The sampler is synchronized with the signal source in such a way that the sampling interval is of slightly shorter duration than the interval 13. In a time division multiplex system, Fig.4 (not shown), where a pulse train comprises pulses belonging to several different channels, a sorter may be provided to reconstitute separate pulse trains for each channel.

    18.
    发明专利
    未知

    公开(公告)号：FR1540783A

    公开(公告)日：1968-09-27

    申请号：FR124339

    申请日：1967-10-13

    Applicant: CARY INSTRUMENTS

    IPC: G02F1/01

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