GB484979A - Improvements in photo-electric photometers - Google Patents

Improvements in photo-electric photometers

Info

Publication number
GB484979A
GB484979A GB2135/38A GB213538A GB484979A GB 484979 A GB484979 A GB 484979A GB 2135/38 A GB2135/38 A GB 2135/38A GB 213538 A GB213538 A GB 213538A GB 484979 A GB484979 A GB 484979A
Authority
GB
United Kingdom
Prior art keywords
photo
electric
plate
prisms
cell
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
GB2135/38A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB484979A publication Critical patent/GB484979A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

484,979. Photo-electric photometric apparatus. ZEISS, C., [Firm of]. Jan. 22, 1938, No. 2135. Convention date, Feb. 5, 1937. [Class 40 (iii)] In photo-electric apparatus for measuring the blackening of a photographic plate 8, a prism or a pair of prisms 17 is adjustably mounted in the path of the light beam, so that by setting the prisms in two different positions the illumination from two different spots A, B of the plate may be thrown on the cell 29, which is connected by a suitable circuit to an indicating instrument 30. The plate 8 is itself adjustable across the light beam, which comes from a source 3 and passes through lenses 5, 6 on its way to the aperture 27 for the cell 29.
GB2135/38A 1937-02-05 1938-01-22 Improvements in photo-electric photometers Expired GB484979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE484979X 1937-02-05

Publications (1)

Publication Number Publication Date
GB484979A true GB484979A (en) 1938-05-12

Family

ID=6543217

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2135/38A Expired GB484979A (en) 1937-02-05 1938-01-22 Improvements in photo-electric photometers

Country Status (1)

Country Link
GB (1) GB484979A (en)

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