GB962735A - Optical attenuator for double beam spectrometer - Google Patents

Optical attenuator for double beam spectrometer

Info

Publication number
GB962735A
GB962735A GB1966661A GB1966661A GB962735A GB 962735 A GB962735 A GB 962735A GB 1966661 A GB1966661 A GB 1966661A GB 1966661 A GB1966661 A GB 1966661A GB 962735 A GB962735 A GB 962735A
Authority
GB
United Kingdom
Prior art keywords
beams
spectrometer
attenuators
double beam
masks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1966661A
Inventor
Edgar Frank Daly
Lyndon Bassett Davies
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicam Instruments Ltd
Original Assignee
Unicam Instruments Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unicam Instruments Ltd filed Critical Unicam Instruments Ltd
Priority to GB1966661A priority Critical patent/GB962735A/en
Publication of GB962735A publication Critical patent/GB962735A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/22—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means
    • G01J1/24—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means using electric radiation detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

962735 Spectrometers UNICAM INSTRUMENTS Ltd 30 May 1962 [31 May 1961] 19666/61 Heading G2J In a double beam spectrometer a variable attenuator is positioned in each of the two beams and means are provided for operating them in unison so that as the attenuation is increased in one beam it is reduced in the other. The attenuators may be masks 2, 3 movable across the beams with oppositely directed end to end aligned tapered apertures 7, 8 which are of the form v = a antilog 10 bx so that the relationship between displacement and absorbance is linear. Each of the two apertured masks may be supported by a carriage movable along rails 13, 15 extending transversely of the spectrometer beams, the two carriages being connected by a non-extensible cord 22 which is connected to a null balance servosystem and pen 23 recording the balance position O of the attenuators. A separately adjustable attenuator may be included in one of the light beams for initial matching of the two beams of the instrument before introduction of a sample to be investigated.
GB1966661A 1961-05-31 1961-05-31 Optical attenuator for double beam spectrometer Expired GB962735A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1966661A GB962735A (en) 1961-05-31 1961-05-31 Optical attenuator for double beam spectrometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1966661A GB962735A (en) 1961-05-31 1961-05-31 Optical attenuator for double beam spectrometer

Publications (1)

Publication Number Publication Date
GB962735A true GB962735A (en) 1964-07-01

Family

ID=10133164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1966661A Expired GB962735A (en) 1961-05-31 1961-05-31 Optical attenuator for double beam spectrometer

Country Status (1)

Country Link
GB (1) GB962735A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658422A (en) * 1969-07-18 1972-04-25 Pye Ltd Dual range double beam null-type spectrophotometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658422A (en) * 1969-07-18 1972-04-25 Pye Ltd Dual range double beam null-type spectrophotometer

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