GB558848A - Improvements to photo-electric apparatus for determining with precision the position of an object carrying a graduation - Google Patents

Improvements to photo-electric apparatus for determining with precision the position of an object carrying a graduation

Info

Publication number
GB558848A
GB558848A GB15657/41A GB1565741A GB558848A GB 558848 A GB558848 A GB 558848A GB 15657/41 A GB15657/41 A GB 15657/41A GB 1565741 A GB1565741 A GB 1565741A GB 558848 A GB558848 A GB 558848A
Authority
GB
United Kingdom
Prior art keywords
scale
grid
lamp
photo
movable part
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
GB15657/41A
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.)
GENEVOISE INSTR PHYSIQUE
Societe Genevoise dInstruments de Physique
Original Assignee
GENEVOISE INSTR PHYSIQUE
Societe Genevoise dInstruments de Physique
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 GENEVOISE INSTR PHYSIQUE, Societe Genevoise dInstruments de Physique filed Critical GENEVOISE INSTR PHYSIQUE
Publication of GB558848A publication Critical patent/GB558848A/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
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/06—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness specially adapted for measuring length or width of objects while moving
    • G01B21/065—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness specially adapted for measuring length or width of objects while moving for stretchable materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Measuring Cells (AREA)

Abstract

558,848. Photo-electric scale-reading devices. SOC. GENEVOISE D'INSTRUMENTS DE PHYSIQUE. Dec. 4, 1941, No. 15657. Convention date, Dec. 28, 1940. [Class 40 (iii)] In an apparatus for determining by photoelectric means the position of a movable part, a graduation of precision fixed on the movable part is made to act as an optical grid, and a source of light is provided to project an image of this grid through another grid to a photoelectric cell in order to permit automatic stopping of the movable part in a predetermined position at the instant of coincidence of the grids. As shown in Fig. 1, the scale 2 constituting the first grid is situated against the second grid 1, and both grids are between the lamp 3 and the photoelectric cell 5. In another arrangement, Fig. 2, the scale 2 is illuminated from the lamp 3 through lenses 10 and by reflection from a mirror 11, and the illuminated scale is projected by lens 12 on the second grid 1, beyond which is situated the photo-electric cell 5. In a modification of this the mirror 11 is omitted and the lamp 3 with the lenses 10 is situated like the lamp 3 of Fig. 1, below the scale 2. The scale 2 may comprise regularly spaced groups 14a, Fig. 4, of irregularly spaced lines. Reference has been directed by the Comptroller to Specifications 506,322 and 513,654.
GB15657/41A 1940-12-28 1941-12-04 Improvements to photo-electric apparatus for determining with precision the position of an object carrying a graduation Expired GB558848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH558848X 1940-12-28

Publications (1)

Publication Number Publication Date
GB558848A true GB558848A (en) 1944-01-25

Family

ID=4520153

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15657/41A Expired GB558848A (en) 1940-12-28 1941-12-04 Improvements to photo-electric apparatus for determining with precision the position of an object carrying a graduation

Country Status (1)

Country Link
GB (1) GB558848A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977471C (en) * 1953-03-19 1966-08-04 Wenczler & Heidenhain Arrangement for measuring and controlling the movement of machines, in particular machine tools

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977471C (en) * 1953-03-19 1966-08-04 Wenczler & Heidenhain Arrangement for measuring and controlling the movement of machines, in particular machine tools

Similar Documents

Publication Publication Date Title
SE333469B (en)
GB558848A (en) Improvements to photo-electric apparatus for determining with precision the position of an object carrying a graduation
GB719700A (en) Method of and apparatus for testing lenses
GB869627A (en) Improvements in apparatus for testing alignment and directions
GB1063140A (en) Improvements in or relating to tool-setting gauges
FR2425065A1 (en) Optical system for measuring surface reflectance properties - has optical elements aligned close to surface normal (OE 15.10.79)
GB570022A (en) A projection system for the inspection of internal surfaces
GB1286421A (en) Optical device for testing alignment and direction
US3658419A (en) Device to facilitate the focusing of a distance meter
GB617157A (en) Apparatus for determining the distance between the optical centres of two or more juxtaposed lenses or lens systems
SU549772A1 (en) Dual image autocollimation device
GB1108235A (en) Optical device for the determination of the symmetry and surface conditions of the inside of tubes
SU470698A1 (en) Device for measuring linear displacements
GB760881A (en) A reading device for scales and the like
GB674193A (en) Improvements in or relating to optical comparators
SU136932A1 (en) Interferometer
GB862038A (en) Improvements in or relating to an optical measuring device
GB605482A (en) Improvements in or relating to range finders
GB616254A (en) Planimeter with an optical reading-off device
GB895336A (en) Scale-reading device for measuring scales
GB605484A (en) Improvements in or relating to range finders
GB859446A (en) A comparison microscope
JPS6449012A (en) Optical system for focus detection
GB1275672A (en) Improvements in or relating to copying apparatus and methods of copying
GB919168A (en) Improvements in photoelectric devices