GB1156920A - Method and apparatus for Determining Surface Quality - Google Patents

Method and apparatus for Determining Surface Quality

Info

Publication number
GB1156920A
GB1156920A GB1241066A GB1241066A GB1156920A GB 1156920 A GB1156920 A GB 1156920A GB 1241066 A GB1241066 A GB 1241066A GB 1241066 A GB1241066 A GB 1241066A GB 1156920 A GB1156920 A GB 1156920A
Authority
GB
United Kingdom
Prior art keywords
light
photo
finish
reflected
differential
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
GB1241066A
Inventor
Joseph Ian Roberts
Henry Tipton
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.)
MACH TOOL INDUSTRY RES ASS
Original Assignee
MACH TOOL INDUSTRY RES ASS
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 MACH TOOL INDUSTRY RES ASS filed Critical MACH TOOL INDUSTRY RES ASS
Priority to GB1241066A priority Critical patent/GB1156920A/en
Publication of GB1156920A publication Critical patent/GB1156920A/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

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)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,156,920. Photo-electric surface finish determination. MACHINE TOOL INDUSTRY RESEARCH ASSOCIATION. May 26, 1967 [March 21, 1966], No.12410/66. Heading G1A. In determining the quality of finish of a surface a photo-cell is alternately progressively exposed to and progressively cut off from light reflected off the surface, the photo-cell output wave form thereby indicating whether the light received was a sharply defined beam specularly reflected off a good surface or an ill-defined beam diffusely reflected off a poor surface. The alternate exposure and cut-off of light may be provided by a continuously rotating toothed disc or a slit which repeatedly opens and closes. An indication of the surface finish is given by the maximum amplitude of the second differential of photo-cell output, that is the rate of increase or decrease in light received, or alternatively by a comparison of the maximum amplitudes of the output and its finish differential, that is a measure of the specularly reflected light as a proportion of the total light.
GB1241066A 1966-03-21 1966-03-21 Method and apparatus for Determining Surface Quality Expired GB1156920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1241066A GB1156920A (en) 1966-03-21 1966-03-21 Method and apparatus for Determining Surface Quality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1241066A GB1156920A (en) 1966-03-21 1966-03-21 Method and apparatus for Determining Surface Quality

Publications (1)

Publication Number Publication Date
GB1156920A true GB1156920A (en) 1969-07-02

Family

ID=10004089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1241066A Expired GB1156920A (en) 1966-03-21 1966-03-21 Method and apparatus for Determining Surface Quality

Country Status (1)

Country Link
GB (1) GB1156920A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218199A (en) * 1988-05-06 1989-11-08 Leicester Polytechnic Method and apparatus for inspecting a smooth surface

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218199A (en) * 1988-05-06 1989-11-08 Leicester Polytechnic Method and apparatus for inspecting a smooth surface
GB2218199B (en) * 1988-05-06 1992-01-08 Leicester Polytechnic Method and apparatus for inspecting a smooth surface

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Legal Events

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