GB1273847A - Surface testing device - Google Patents

Surface testing device

Info

Publication number
GB1273847A
GB1273847A GB378070A GB378070A GB1273847A GB 1273847 A GB1273847 A GB 1273847A GB 378070 A GB378070 A GB 378070A GB 378070 A GB378070 A GB 378070A GB 1273847 A GB1273847 A GB 1273847A
Authority
GB
United Kingdom
Prior art keywords
aperture
light
situated
photo
coupled
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
GB378070A
Inventor
Michael John Barry Franklin
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.)
British Titan Ltd
Original Assignee
British Titan 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 British Titan Ltd filed Critical British Titan Ltd
Priority to GB378070A priority Critical patent/GB1273847A/en
Publication of GB1273847A publication Critical patent/GB1273847A/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
    • G01N21/55—Specular reflectivity
    • G01N21/57—Measuring gloss

Landscapes

  • Physics & Mathematics (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)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1,273,847. Measuring surface reflections, photo-electric gloss measurement. BRITISH TITAN Ltd. April 19, 1971 [Jan. 27, 1970], No. 3780/70. Headings G1A and G1P. A device for measuring the amount of light reflected from a surface 3, e.g. of paint, comprises a light source 7, a first aperture 10 situated at the focal plane of a first lens system 16 so that a parallel beam of light is directed onto the surface 3, a second lens system 28 to receive the reflected light, a second aperture 23 of the same size as the aperture 10 and situated at the focal plane of the second lens 28 and a photo-electric device 20 to measure the amount of light passing through the aperture 20. The current produced by the device 20 may be coupled to an automatic recording device or may be coupled to a meter that is initially calibrated by using a glazed black tile as the reflective surface and varying the power supplied to the light source. A diffuser 11 of frosted glass may be placed over the first aperture 10.
GB378070A 1970-01-27 1970-01-27 Surface testing device Expired GB1273847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB378070A GB1273847A (en) 1970-01-27 1970-01-27 Surface testing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB378070A GB1273847A (en) 1970-01-27 1970-01-27 Surface testing device

Publications (1)

Publication Number Publication Date
GB1273847A true GB1273847A (en) 1972-05-10

Family

ID=9764784

Family Applications (1)

Application Number Title Priority Date Filing Date
GB378070A Expired GB1273847A (en) 1970-01-27 1970-01-27 Surface testing device

Country Status (1)

Country Link
GB (1) GB1273847A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees