GB1172668A – Improvements in or relating to Apparatus for use in Distance Measuring Equipment.
– Google Patents
GB1172668A – Improvements in or relating to Apparatus for use in Distance Measuring Equipment.
– Google Patents
Improvements in or relating to Apparatus for use in Distance Measuring Equipment.
Info
Publication number
GB1172668A
GB1172668A
GB6237/69A
GB623769A
GB1172668A
GB 1172668 A
GB1172668 A
GB 1172668A
GB 6237/69 A
GB6237/69 A
GB 6237/69A
GB 623769 A
GB623769 A
GB 623769A
GB 1172668 A
GB1172668 A
GB 1172668A
Authority
GB
United Kingdom
Prior art keywords
crystal
crystals
axes
light beam
modulation
Prior art date
1966-12-01
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
GB6237/69A
Inventor
Keith Davy Froome
Robert Howard Bradsell
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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.)
1966-12-01
Filing date
1966-12-01
Publication date
1969-12-03
1966-12-01
Application filed by National Research Development Corp UK
filed
Critical
National Research Development Corp UK
1969-12-03
Publication of GB1172668A
publication
Critical
patent/GB1172668A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
G01S17/06—Systems determining position data of a target
G01S17/08—Systems determining position data of a target for measuring distance only
G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
Abstract
1,172,668. Light modulation. NATIONAL RESEARCH DEVELOPMENT CORP. 29 Nov., 1967 [1 Dec., 1966], No. 6237/69. Divided out of 1,156,548. Heading H4F. The subject matter of this Specification is identical with that described in Specification 1,156,548, but the claims are concerned with the cavity resonator and crystal assembly used for elliptically polarization modulating the transmitted light beam. Linearly polarized light (polarizer P2, Figs. 1, 2) passes through two KDP crystals X 1 and X 2 exhibiting the direct Pockels linear electro – optic effect and mounted substantially diametrically across a coaxial waveguide M comprising inner and outer conductors I and O respectively. The Z axes of the crystals are parallel to and in the direction of the light beam (i.e. that of crystal X 1 is against the electric field E, and that of crystal X 2 is with), the X axis of crystal X 1 is parallel to the plane of polarization of the light beam and that of crystal X 2 is orthogonal to that of crystal X 1 . The crystals thus give a cumulative elliptical polarization of the exit beam with a modulation wavelength equal to the tuned wavelength of the cavity resonator beam. On reflection from a distant object the light beam passes through a second pair of KDP crystals X 4 and X 3 , the Z axes thereof being parallel and with the beam and the X axes being orthogonal to those of crystals X 2 and X 1 respectively. The reflected beam exits through crossed analyzer P 2 . The second pair of crystals which emphasize or decrease the modulation of the first pair according to the go and return distance of the light beam path. A photomultiplier detection PM allows the detection of cancellation of said modulation and determination of said distance in conjunction with variation of variable path length means VP. In the alternative assembly of Figs. la and 2a only one crystal Z 1 X 4 per beam path is used diametrically placed across the end of a coaxial cavity with the electric field being axially established between the end plate IP of the inner conductor K and the end plate OP of the outer conductor O. The Z axes of the crystals are with the respective beam directions and the X axes are orthogonal.
GB6237/69A
1966-12-01
1966-12-01
Improvements in or relating to Apparatus for use in Distance Measuring Equipment.
Expired
GB1172668A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB53926/66A
GB1156548A
(en)
1966-12-01
1966-12-01
Improvements in or relating to Distance Measurement
Publications (1)
Publication Number
Publication Date
GB1172668A
true
GB1172668A
(en)
1969-12-03
Family
ID=10469425
Family Applications (2)
Application Number
Title
Priority Date
Filing Date
GB53926/66A
Expired
GB1156548A
(en)
1966-12-01
1966-12-01
Improvements in or relating to Distance Measurement
GB6237/69A
Expired
GB1172668A
(en)
1966-12-01
1966-12-01
Improvements in or relating to Apparatus for use in Distance Measuring Equipment.
Family Applications Before (1)
Application Number
Title
Priority Date
Filing Date
GB53926/66A
Expired
GB1156548A
(en)
1966-12-01
1966-12-01
Improvements in or relating to Distance Measurement
Country Status (7)
Country
Link
US
(1)
US3547539A
(en)
JP
(1)
JPS5219102B1
(en)
CH
(1)
CH488194A
(en)
DE
(1)
DE1623518C3
(en)
FR
(1)
FR1569610A
(en)
GB
(2)
GB1156548A
(en)
SE
(2)
SE330445B
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3817621A
(en)
*
1973-04-19
1974-06-18
C Kester
Range finder
EP0205406A2
(en)
*
1985-06-12
1986-12-17
Leica Aarau AG
Electro-optical range finder
WO1987004257A1
(en)
*
1986-01-06
1987-07-16
Rank Taylor Hobson Limited
Metrological apparatus and method using polarisation modulation
Families Citing this family (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3728025A
(en)
*
1971-03-08
1973-04-17
Cubic Corp
Optical distance measuring equipment
DE2327368C2
(en)
*
1973-05-29
1982-10-07
South African Inventions Development Corp., Scientia, Pretoria,Transvaal
Electronic distance measuring instrument
GB1511354A
(en)
*
1975-05-07
1978-05-17
Nat Res Dev
Distance measuring apparatus
CA2446909A1
(en)
*
2001-05-30
2002-12-05
Eagle Ray Corporation
Optical sensor for distance measurement
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2966090A
(en)
*
1954-12-28
1960-12-27
Gasaccumulator Svenska Ab
Optical distance measuring device
GB919368A
(en)
*
1960-09-22
1963-02-27
Nat Res Dev
Improvements relating to the measurement of distance
1966
1966-12-01
GB
GB53926/66A
patent/GB1156548A/en
not_active
Expired
1966-12-01
GB
GB6237/69A
patent/GB1172668A/en
not_active
Expired
1967
1967-11-24
US
US685414A
patent/US3547539A/en
not_active
Expired – Lifetime
1967-11-30
CH
CH1682567A
patent/CH488194A/en
not_active
IP Right Cessation
1967-11-30
SE
SE16498/67A
patent/SE330445B/xx
unknown
1967-12-01
FR
FR1569610D
patent/FR1569610A/fr
not_active
Expired
1967-12-01
DE
DE1623518A
patent/DE1623518C3/en
not_active
Expired
1970
1970-07-28
SE
SE7010363A
patent/SE369233C/en
unknown
1971
1971-04-21
JP
JP46026019A
patent/JPS5219102B1/ja
active
Pending
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3817621A
(en)
*
1973-04-19
1974-06-18
C Kester
Range finder
EP0205406A2
(en)
*
1985-06-12
1986-12-17
Leica Aarau AG
Electro-optical range finder
EP0205406A3
(en)
*
1985-06-12
1987-08-19
Kern & Co. Ag Werke Fur Prazisionsmechanik Optik Und Elektronik
Electro-optical range finder
WO1987004257A1
(en)
*
1986-01-06
1987-07-16
Rank Taylor Hobson Limited
Metrological apparatus and method using polarisation modulation
EP0230345A1
(en)
*
1986-01-06
1987-07-29
Rank Taylor Hobson Limited
Metrological apparatus and method using polarisation modulation
Also Published As
Publication number
Publication date
FR1569610A
(en)
1969-06-06
DE1623518C3
(en)
1980-07-31
JPS5219102B1
(en)
1977-05-26
SE330445B
(en)
1970-11-16
CH488194A
(en)
1970-03-31
SE369233C
(en)
1979-03-01
DE1623518A1
(en)
1971-04-22
DE1623518B2
(en)
1979-11-22
GB1156548A
(en)
1969-06-25
US3547539A
(en)
1970-12-15
SE369233B
(en)
1974-08-12
Similar Documents
Publication
Publication Date
Title
US3272988A
(en)
1966-09-13
Polarization modulation system for transmitting and receiving two independent signals over a single electromagnetic carrier
US3407364A
(en)
1968-10-22
Intracavity laser phase modulator
Blumenthal
1962
Design of a microwave-frequency light modulator
US4733397A
(en)
1988-03-22
Resonant cavity optical modulator
JP2839369B2
(en)
1998-12-16
Optical carrier generator using stimulated Brillouin scattering
US3267804A
(en)
1966-08-23
Optical circulator
US3495892A
(en)
1970-02-17
Split beam light modulator
GB1172668A
(en)
1969-12-03
Improvements in or relating to Apparatus for use in Distance Measuring Equipment.
US3356438A
(en)
1967-12-05
Light modulator employing multiplereflective light path
US3305292A
(en)
1967-02-21
Light deflecting device
US3644015A
(en)
1972-02-22
Acousto-optic band reject light filter and apparatus using same
US3366792A
(en)
1968-01-30
Laser intracavity phase modulator
US3325646A
(en)
1967-06-13
Electro-optical communication system
US3532891A
(en)
1970-10-06
Means for stabilization of transverse pockels' cells
US3653765A
(en)
1972-04-04
Acousto-optic light spectrum analysis
US3402002A
(en)
1968-09-17
45deg. cut low voltage optical modulator
Ley
1966
Low-voltage light-amplitude modulation
US3632193A
(en)
1972-01-04
Method and apparatus for control of light transmission through an anisotropic medium
US3450478A
(en)
1969-06-17
Device for the simultaneous measurement of optical rotation and circular dichroism
US3549236A
(en)
1970-12-22
Optical frequency discriminator with dual frequency resonator
NL151856B
(en)
1976-12-15
DEVICE FOR MODULATING THE RADIATION OF A LASER.
US3497831A
(en)
1970-02-24
Broad-band electro-optic modulator
GB1100506A
(en)
1968-01-24
High speed laser frequency selector
DE4436454A1
(en)
1996-04-18
AC voltage or variable electric field measuring method
US3406356A
(en)
1968-10-15
Optical frequency translator
Legal Events
Date
Code
Title
Description
1970-04-15
PS
Patent sealed [section 19, patents act 1949]
1987-12-23
PE20
Patent expired after termination of 20 years
