GB1346930A – Acousto-optic method and apparatus
– Google Patents
GB1346930A – Acousto-optic method and apparatus
– Google Patents
Acousto-optic method and apparatus
Info
Publication number
GB1346930A
GB1346930A
GB2849671A
GB2849671A
GB1346930A
GB 1346930 A
GB1346930 A
GB 1346930A
GB 2849671 A
GB2849671 A
GB 2849671A
GB 2849671 A
GB2849671 A
GB 2849671A
GB 1346930 A
GB1346930 A
GB 1346930A
Authority
GB
United Kingdom
Prior art keywords
crystal
polarization plane
acoustic wave
light beam
thermopile
Prior art date
1970-06-17
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
GB2849671A
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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.)
1970-06-17
Filing date
1971-06-17
Publication date
1974-02-13
1971-06-17
Application filed by Hewlett Packard Co
filed
Critical
Hewlett Packard Co
1974-02-13
Publication of GB1346930A
publication
Critical
patent/GB1346930A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
239000013078
crystal
Substances
0.000
abstract
4
230000010287
polarization
Effects
0.000
abstract
4
230000003287
optical effect
Effects
0.000
abstract
2
238000001228
spectrum
Methods
0.000
abstract
2
238000012886
linear function
Methods
0.000
abstract
1
230000003595
spectral effect
Effects
0.000
abstract
1
230000001360
synchronised effect
Effects
0.000
abstract
1
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
G01J3/12—Generating the spectrum; Monochromators
G01J3/1256—Generating the spectrum; Monochromators using acousto-optic tunable filter
G—PHYSICS
G02—OPTICS
G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
G02F1/11—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
G02F1/113—Circuit or control arrangements
G—PHYSICS
G01—MEASURING; TESTING
G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
G01J3/28—Investigating the spectrum
G01J2003/2866—Markers; Calibrating of scan
Abstract
1346930 Photo-electric spectrometers HEWLETT-PACKARD CO 17 June 1971 [17 June 1970] 28496/71 Heading G1A A device for analyzing the optical spectrum of a light source 8 utilizes as a wavelength selector an optically anisotropic medium 2 excited by an optical wave 51, 52 thereby making use of the phenomenon that when a light beam 11, planepolarized at 12, is incident on such a crystal collinear with an acoustic wave 52 travelling through the crystal, one small wavelength band of the light beam, determined by the acoustic wave frequency, has its polarization plane rotated through 90 degrees and can therefore be separated from the remainder of the beam, whose polarization plane is unchanged, e.g. by a crossed polarizer 13. Changing the acoustic wave frequency correspondingly changes the wavelength band passed by the polarizer 13 and hence enables a wavelength scan of the incident light beam 11 to be made. The acoustic wave frequency is swept by a generator 19 coupled to an oscillator 4. The output from a thermopile 15 is applied via a switch 17 to a recorder 18 whose chart drive is coupled to the sweep generator 19; hence the recorder presents the spectrum of the beam 11. The percentage of incident light within a particular waveband that has its polarization plane switched is not a linear function of acoustic frequency and the apparatus therefore has to be calibrated. This is done by rotating a mirror 9 so that the crystal 2 is irradiated by a known source 21 having uniform spectral power density in the region of interest. A switch 17, synchronized with the mirror movement, applies the thermopile output to an error detector and store 25 where it is compared with a D.C. reference signal 26. Any error signal is fedback to the control input of the amplifier 5 or the amplifier 16. In another embodiment Fig.2, (not shown) the light beam to be investigated is first passed through a Rochon prism (32) where it is planepolarized. It then passes through the acoustically excited crystal, is reflected from an end-face thereof and emerges having two normally polarized components. The component of interest, which has had its polarization plane switched by 90 degrees, is reflected from the internal face of the Rochon prism to be received by the thermopile.
GB2849671A
1970-06-17
1971-06-17
Acousto-optic method and apparatus
Expired
GB1346930A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US4704470A
1970-06-17
1970-06-17
Publications (1)
Publication Number
Publication Date
GB1346930A
true
GB1346930A
(en)
1974-02-13
Family
ID=21946771
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2849671A
Expired
GB1346930A
(en)
1970-06-17
1971-06-17
Acousto-optic method and apparatus
Country Status (5)
Country
Link
US
(1)
US3653765A
(en)
CH
(1)
CH534345A
(en)
DE
(1)
DE2122940C3
(en)
FR
(1)
FR2095316B1
(en)
GB
(1)
GB1346930A
(en)
Families Citing this family (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US5051962A
(en)
*
1972-05-04
1991-09-24
Schlumberger Technology Corporation
Computerized truck instrumentation system
US3962577A
(en)
*
1975-01-10
1976-06-08
Itek Corporation
Electro-optic system with expanded power range
FR2300998A2
(en)
*
1975-02-11
1976-09-10
Anvar
DEVICE FOR SELECTIVE MODULATION INTERFERENTIAL SPECTROMETRY
US4016563A
(en)
*
1975-05-27
1977-04-05
Hughes Aircraft Company
Method and apparatus for acousto-optic pulse compression
FR2341137A1
(en)
*
1976-02-13
1977-09-09
Thomson Csf
LIGHT SOURCE DETECTION DEVICE AND SYSTEM INCLUDING SUCH A DEVICE
JPS52152737A
(en)
*
1976-06-14
1977-12-19
Matsushita Electric Ind Co Ltd
Loss measuring system for optical fibers
US4191473A
(en)
*
1978-01-09
1980-03-04
Hansch Theodor W
Method of and apparatus for measuring the absolute wavelength of a source of unknown frequency radiation
US4456338A
(en)
*
1981-03-05
1984-06-26
Macdonald Dettwiler & Associates Ltd.
Electronically tuneable light source
FR2596877B1
(en)
*
1986-04-02
1988-07-08
Centre Nat Rech Scient
MULTI-FREQUENCY ACOUSTO-OPTIC MODULATION METHOD AND DEVICE
US5406082A
(en)
*
1992-04-24
1995-04-11
Thiokol Corporation
Surface inspection and characterization system and process
US5541413A
(en)
*
1992-04-24
1996-07-30
Thiokol Corporation
Acousto-optic tunable filter-based surface scanning system and process
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3011386A
(en)
*
1955-08-01
1961-12-05
Servo Corp Of America
Spectrometer
US3012467A
(en)
*
1957-06-25
1961-12-12
Servo Corp Of America
Spectrum analyzer
US3171882A
(en)
*
1962-04-24
1965-03-02
Baird Atomic Inc
Spectroscopic apparatus
US3447876A
(en)
*
1965-10-11
1969-06-03
Barringer Research Ltd
Apparatus for detecting monatomic vapours
US3409373A
(en)
*
1965-12-10
1968-11-05
Beckman Instruments Inc
Period control for spectrophotometers
GB1313591A
(en)
*
1969-05-01
1973-04-11
Chromatix
Acousto-optic devices
1970
1970-06-17
US
US47044A
patent/US3653765A/en
not_active
Expired – Lifetime
1971
1971-05-10
DE
DE2122940A
patent/DE2122940C3/en
not_active
Expired
1971-06-02
CH
CH801471A
patent/CH534345A/en
not_active
IP Right Cessation
1971-06-17
FR
FR7122006A
patent/FR2095316B1/fr
not_active
Expired
1971-06-17
GB
GB2849671A
patent/GB1346930A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE2122940C3
(en)
1974-03-07
FR2095316B1
(en)
1975-03-14
DE2122940B2
(en)
1973-08-16
FR2095316A1
(en)
1972-02-11
US3653765A
(en)
1972-04-04
CH534345A
(en)
1973-02-28
DE2122940A1
(en)
1971-12-23
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Legal Events
Date
Code
Title
Description
1974-07-03
PS
Patent sealed [section 19, patents act 1949]
1982-01-20
PCNP
Patent ceased through non-payment of renewal fee
