CH612501A5 - Optoelectronic device for measuring a dimensional variation or the displacement of an object - Google Patents

Optoelectronic device for measuring a dimensional variation or the displacement of an object

Info

Publication number
CH612501A5
CH612501A5 CH156376A CH156376A CH612501A5 CH 612501 A5 CH612501 A5 CH 612501A5 CH 156376 A CH156376 A CH 156376A CH 156376 A CH156376 A CH 156376A CH 612501 A5 CH612501 A5 CH 612501A5
Authority
CH
Switzerland
Prior art keywords
photodetectors
displacement
measuring
diaphragm
windows
Prior art date
Application number
CH156376A
Inventor
Jean-Raymond Delmas
Original Assignee
Microlec Sa
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 Microlec Sa filed Critical Microlec Sa
Priority to FR7622680A priority Critical patent/FR2340574A2/en
Publication of CH612501A5 publication Critical patent/CH612501A5/en

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B1/00—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values
    • G05B1/01—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric
    • G05B1/04—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric with sensing of the position of the pointer of a measuring instrument
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The device is provided for the high-precision dimensional measurement and the control of the absence of exceeding of tolerances of a prescribed value either for a dimension or for the displacement of an object. It comprises a light source (1) and at least one pair of photodetectors (21, 22) illuminated through two windows (31, 32) of surface area which can be varied in opposition. The windows are formed by a diaphragm (4) and a moving mask (3) which is thinner than the aperture of the diaphragm. In order to exploit the difference in illumination of the two photodetectors and to draw from this information the desired measurement, these photodetectors (21, 22) have a common electrode (34) and are connected in series between two electrical supply lines (21, 22). The device makes it possible to measure small dimensions of the order of 1 micron and less. <IMAGE>
CH156376A 1975-02-07 1976-02-04 Optoelectronic device for measuring a dimensional variation or the displacement of an object CH612501A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7622680A FR2340574A2 (en) 1976-02-04 1976-07-26 Optoelectronic dimensional control system - uses two pairs of photoreceivers detecting positive and negative tolerance respectively

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7503928A FR2300367A1 (en) 1975-02-07 1975-02-07 Optical-electronic position or displacement control system - uses paired photo receivers and their illumination difference to control two state electronic circuits

Publications (1)

Publication Number Publication Date
CH612501A5 true CH612501A5 (en) 1979-07-31

Family

ID=9150943

Family Applications (1)

Application Number Title Priority Date Filing Date
CH156376A CH612501A5 (en) 1975-02-07 1976-02-04 Optoelectronic device for measuring a dimensional variation or the displacement of an object

Country Status (2)

Country Link
CH (1) CH612501A5 (en)
FR (1) FR2300367A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2653221B1 (en) * 1989-10-13 1993-04-09 Poulain Claude METHOD FOR DETECTING THE RELATIVE POSITIONING OF A NEEDLE INDICATOR, AND ELECTRONIC DEVICE FOR IMPLEMENTING IT.

Also Published As

Publication number Publication date
FR2300367B1 (en) 1978-03-10
FR2300367A1 (en) 1976-09-03

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Legal Events

Date Code Title Description
PL Patent ceased