GB388033A - Improvements in photoelectric methods of measuring the area of opaque objects of irregular form - Google Patents

Improvements in photoelectric methods of measuring the area of opaque objects of irregular form

Info

Publication number
GB388033A
GB388033A GB2239631A GB2239631A GB388033A GB 388033 A GB388033 A GB 388033A GB 2239631 A GB2239631 A GB 2239631A GB 2239631 A GB2239631 A GB 2239631A GB 388033 A GB388033 A GB 388033A
Authority
GB
United Kingdom
Prior art keywords
light
hide
area
negative
illuminated
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
GB2239631A
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.)
MICHAEL BUCZACZER
Original Assignee
MICHAEL BUCZACZER
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 MICHAEL BUCZACZER filed Critical MICHAEL BUCZACZER
Priority to GB2239631A priority Critical patent/GB388033A/en
Publication of GB388033A publication Critical patent/GB388033A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
    • G01B11/285—Measuring arrangements characterised by the use of optical techniques for measuring areas using photoelectric detection means

Abstract

388,033. Area meters. BUCZACZER, M., 26, St. Aidans Road, East Dulwich, London. Aug. 7, 1931, No. 22396. [Class 106 (i).] The area of an object such as a hide is determined by measuring photoelectrically the light blocked out by the object when it is placed on an illuminated surface, means being provided to compensate for irregularities in the illumination of the surface. The hide 3 is placed on a surface 1 illuminated by lamps 2, the light passing through an optical system 4 to a diffusing box 5 containing photoelectric cells 6. To compensate for the irregularities of illumination or imperfections in the optical system a photographic negative 7 is interposed in the light path. This negative is previously exposed to the light from the surface 1 in the absence of the hide, and then developed, the dark parts of the negative thus compensating for the light parts of the surface, and vice versa. In another method, the surface 1 is illuminated by a travelling strip of light and the total charge passed through the cells 6 is measured by a ballistic galvanometer. This second method may be used either in conjunction with the negative 7 or independently. The area determined may be stamped on the hide by known means.
GB2239631A 1931-08-07 1931-08-07 Improvements in photoelectric methods of measuring the area of opaque objects of irregular form Expired GB388033A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2239631A GB388033A (en) 1931-08-07 1931-08-07 Improvements in photoelectric methods of measuring the area of opaque objects of irregular form

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2239631A GB388033A (en) 1931-08-07 1931-08-07 Improvements in photoelectric methods of measuring the area of opaque objects of irregular form

Publications (1)

Publication Number Publication Date
GB388033A true GB388033A (en) 1933-02-07

Family

ID=10178680

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2239631A Expired GB388033A (en) 1931-08-07 1931-08-07 Improvements in photoelectric methods of measuring the area of opaque objects of irregular form

Country Status (1)

Country Link
GB (1) GB388033A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983298A1 (en) * 2007-04-20 2008-10-22 Con - Med S.R.L. Optical area scanning device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983298A1 (en) * 2007-04-20 2008-10-22 Con - Med S.R.L. Optical area scanning device

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