GB1259310A - Creation of Inventions and Patents with Artificial Intelligence

GB1259310A – – Google Patents

Info

Publication number
GB1259310A

GB1259310A

GB1259310DA
GB1259310A
GB 1259310 A
GB1259310 A
GB 1259310A

GB 1259310D A
GB1259310D A
GB 1259310DA
GB 1259310 A
GB1259310 A
GB 1259310A
Authority
GB
United Kingdom
Prior art keywords
beams
grating
light
produced
movement
Prior art date
1968-02-06
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

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.)
1968-02-06
Filing date
1969-02-03
Publication date
1972-01-05

1969-02-03
Application filed
filed
Critical

1972-01-05
Publication of GB1259310A
publication
Critical
patent/GB1259310A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

230000010287
polarization
Effects

0.000
abstract
4

238000001514
detection method
Methods

0.000
abstract
2

239000010453
quartz
Substances

0.000
abstract
2

VYPSYNLAJGMNEJ-UHFFFAOYSA-N
silicon dioxide
Inorganic materials

O=[Si]=O
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
0.000
abstract
2

230000003287
optical effect
Effects

0.000
abstract
1

Classifications

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

G01D5/36—Forming the light into pulses

G01D5/38—Forming the light into pulses by diffraction gratings

Abstract

1,259,310. Optical detection of movement. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 3 Feb., 1969 [6 Feb., 1968], No. 5663/69. Heading H4D. [Also in Division G2] In a system to determine movement of object 6, Fig. 1, in two dimensions X and Y, Fig. 2, a two-dimensional diffraction grating 8 is fixed to the object and a beam of light from source 1 caused to impinge on the grating, whereby the thus diffracted beams are detected by means 19 and 20, means 19 detecting the beam diffracted by the grating lines in the X dimension, and, by counting the sinusoidal variations of the intensity of said beam, determining the movement of the object in said dimensions, and means 20 likewise detecting the Y dimensions diffracted and so determining movement in said Y dimension. The grating may be as shown (highly magnified) in Fig. 2, the 0 and # indicating the relative phases of light reflected from the facets of the grating. The light from source 1 is monochromatic and linearly polarized and is focused on an opening 3 in concave mirror 4. The light beam diverges and is rendered parallel by a lens 5. The parallel beam impinges normally on the grating 8 and is diffracted thereby. Only the first order diffracted beams are considered, the other orders being absorbed in the lens container (shaded) on passing back out through hole 3. Four first order beams are produced, referenced (+1, +1), (+1, -1), (-1, -1) and (-1, + 1), Fig. 3, depending on how they diverge in the X and Y directions, beams (+1, +1) and (-1, -1) being produced by diffractions by the Y aligned gratings, and beams (-1, +1) and (+1, -1) being produced by diffraction by the X aligned gratings. The (+1, +1) and (-1, -1) beams, when they fall on and are reflected by mirror 4, pass through respective -wave plates 91 and 9 such that after said reflection their plane of polarization is perpendicular to that of the (-1, +1) and (+1, -1) beams. The four beams are reflected back to the grating and undergo such diffraction thereat that they are all directed back to hole 3 to pass to a beam separating assembly 13. The two pairs of beams, giving respective X and Y movement information, have orthogonal planes of polarization and are separated out by a prism arrangement 16 and directed to respective detectors 19 and 20. Two non-polarized light sources 1 and 11 may be used, slightly spaced, the respective beams from which pass through respective holes 3 and 31 in the mirror 4. The -wave plates 9, 91 and the polarization separating means 13 are removed. A thick quartz plate is placed between lens 5 and grating 6 and functions in a similar manner to that described in Specification 997,405. Two sets of four divergent diffracted beams are produced, impinging on mirror 4 as shown in Fig. 4. The beams produced by the diffraction, by the X aligned gratings, of the light from source 1 are removed by absorbing areas F 1 and F 2 , and the beams produced by the diffraction by the Y aligned gratings of the light from source 11 are removed by absorbing areas F 3 and F 4 . Thus, all light passing back out through hole 3 carries only information regarding the X direction movement and that passing through hole 31 carries only information regarding the Y direction movement. Such light is detected by correspondingly spaced detection 19 and 191, and 20 and 201. The quartz plate causes the beams to have relative phase differences of #/2 and be separable by a polarization separating beam splitting prism.

GB1259310D
1968-02-06
1969-02-03

Expired

GB1259310A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

NL6801683A

NL6801683A
(en)

1968-02-06
1968-02-06

Publications (1)

Publication Number
Publication Date

GB1259310A
true

GB1259310A
(en)

1972-01-05

Family
ID=19802691
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB1259310D
Expired

GB1259310A
(en)

1968-02-06
1969-02-03

Country Status (7)

Country
Link

US
(1)

US3648055A
(en)

JP
(1)

JPS4837101B1
(en)

CH
(1)

CH498377A
(en)

DE
(1)

DE1904532A1
(en)

FR
(1)

FR2001415A1
(en)

GB
(1)

GB1259310A
(en)

NL
(1)

NL6801683A
(en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3865483A
(en)

1974-03-21
1975-02-11
Ibm
Alignment illumination system

JPH0664084B2
(en)

1985-04-16
1994-08-22
シュルンベルジェオーバーシーズエス．エイ．

Light shock absorber

GB8615197D0
(en)

1986-06-21
1986-07-23
Renishaw Plc
Opto-electronic scale reading apparatus

JPS6316934U
(en)

1986-07-19
1988-02-04

ATE100194T1
(en)

1990-10-20
1994-01-15
Heidenhain Gmbh Dr Johannes

INTERFERENTIAL MEASUREMENT DEVICE FOR AT LEAST ONE MEASUREMENT DIRECTION.

DE19527287C2
(en)

1995-07-26
2000-06-29
Heidenhain Gmbh Dr Johannes

Photoelectric path and angle measuring system for measuring the displacement of two objects to each other

DE102015012811B4
(en)

2015-10-02
2017-07-27
Audi Ag

Optical rotation angle sensor for a motor vehicle, system with an optical rotation angle sensor and method for determining a rotation angle

Family Cites Families (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3297879A
(en)

1963-03-18
1967-01-10
W & L E Gurley
Optical encoder responsive to movement in two directions

DE1548703B2
(en)

1966-07-16
1971-04-15
Ernst Leitz Gmbh, 6330 Wetzlar

PHOTOELECTRIC STEPPER FOR FOUR-PHASE SIGNALS

DE1548707C3
(en)

1966-07-26
1979-02-15
Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar

Photoelectric step generator

1968

1968-02-06
NL
NL6801683A
patent/NL6801683A/xx
unknown

1969

1969-01-30
DE
DE19691904532
patent/DE1904532A1/en
active
Pending

1969-02-03
GB
GB1259310D
patent/GB1259310A/en
not_active
Expired

1969-02-03
CH
CH162569A
patent/CH498377A/en
not_active
IP Right Cessation

1969-02-04
US
US796508A
patent/US3648055A/en
not_active
Expired – Lifetime

1969-02-06
FR
FR6902668A
patent/FR2001415A1/fr
not_active
Withdrawn

1969-02-06
JP
JP44008651A
patent/JPS4837101B1/ja
active
Pending

Also Published As

Publication number
Publication date

JPS4837101B1
(en)

1973-11-09

NL6801683A
(en)

1969-08-08

US3648055A
(en)

1972-03-07

CH498377A
(en)

1970-10-31

DE1904532A1
(en)

1969-08-28

FR2001415A1
(en)

1969-09-26

Contact information