US3879615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the rapid measuring of the angular dependence of scattered light
Assignee: Gesellschaft fuer Kernforschung mbH
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Filing: 1973-11-08
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Granted: 1975-04-22
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Expires: 1993-11-08
Abstract
Abstract For the rapid measuring of the angular dependence of light scattered from particles in a scattering volume, there is provided a stationarily disposed scattered light detector for receiving a scattered light beam isolated by a slit from a scattered light radiation emanating from the scattering volume in the molecular jet. The scattered light is generated by an exciting laser beam that traverses the scattering volume. By means of a rotating member, either the laser beam or the scattered light is rotated.
Inventors
- 👤 Herbert Moser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:03
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/02; G01N15/0205
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
131 words
An apparatus for the rapid measuring of the angular dependence of light scattered from a scattering volume containing particles, particularly those forming a cluster jet, which has a main axis, comprising in combination: a. means for generating a laser beam; b. means for rotating said laser beam in a plane about the scattering volume so that the rotating laser beam is directed into the scattering volume for traversing the same and for generating light scattered by the particles in the scattering volume; c. means defining a stationary slit being spaced from said main axis for transmitting a scattered light beam of the scattered light; and d. a scattered light detector being stationary with respect to said main axis and in alignment with said slit for receiving therefrom said scattered light beam.
Claim 2
Independent Claim
131 words
An apparatus for the rapid measuring of the angular dependence of light scattered from a scattering volume containing particles, particularly those forming a cluster jet, which has a main axis, comprising in combination: a. means for generating a laser beam; b. means for rotating said laser beam in a plane about the scattering volume so that the rotating laser beam is directed into the scattering volume for traversing the same and for generating light scattered by the particles in the scattering volume; c. means defining a stationary slit being spaced from said main axis for transmitting a scattered light beam of the scattered light; and d. a scattered light detector being stationary with respect to said main axis and in alignment with said slit for receiving therefrom said scattered light beam.
Claim 3
Independent Claim
131 words
An apparatus for the rapid measuring of the angular dependence of light scattered from a scattering volume containing particles, particularly those forming a cluster jet, which has a main axis, comprising in combination: a. means for generating a laser beam; b. means for rotating said laser beam in a plane about the scattering volume so that the rotating laser beam is directed into the scattering volume for traversing the same and for generating light scattered by the particles in the scattering volume; c. means defining a stationary slit being spaced from said main axis for transmitting a scattered light beam of the scattered light; and d. a scattered light detector being stationary with respect to said main axis and in alignment with said slit for receiving therefrom said scattered light beam.
Claim 4
Independent Claim
131 words
An apparatus for the rapid measuring of the angular dependence of light scattered from a scattering volume containing particles, particularly those forming a cluster jet, which has a main axis, comprising in combination: a. means for generating a laser beam; b. means for rotating said laser beam in a plane about the scattering volume so that the rotating laser beam is directed into the scattering volume for traversing the same and for generating light scattered by the particles in the scattering volume; c. means defining a stationary slit being spaced from said main axis for transmitting a scattered light beam of the scattered light; and d. a scattered light detector being stationary with respect to said main axis and in alignment with said slit for receiving therefrom said scattered light beam.
Claim 5
Dependent Claim
16 words
An apparatus as defined in claim 1, wherein said plane is normal to said main axis.
Claim 6
Dependent Claim
67 words
An apparatus as defined in claim 1, wherein said means for rotating said laser beam includes a rotating member disposed at a distance from said main axis, whereby said laser beam rotatingly emanates from said rotating member; and a reflecting surface intersecting said plane and disposed at least partially about said main axis for reflecting towards the scattering volume, said laser beam emanating from said rotating member.
Claim 7
Dependent Claim
42 words
An apparatus as defined in claim 3, wherein said reflecting surface is formed of an elliptical cylinder mirror having a first focal axis contained in said rotating member and a second focal axis coinciding with said main axis of the scattering volume.
Claim 8
Dependent Claim
79 words
An apparatus as defined in claim 3, wherein said rotating member is a mirror for reflecting the laser beam, the combination further comprising a quarter wave plate arranged to be traversed by said laser beam for circularly polarizing the same prior to its impingement on said rotating mirror; and a polarizer arranged to be traversed by said laser beam for lineraly polarizing the same subsequent to its reflection by said rotating mirror and prior to traversing the scattering volume.
Claim 9
Dependent Claim
59 words
An apparatus as defined in claim 1, wherein said means for rotating said laser beam includes a rotating member from which said laser beam rotatingly emanates; at least one stationarily supported, rotationally symmetrical prism having a reflecting base intersecting said plane and surrounding said main axis, said rotating laser beam is reflected from said base onto said scattering volume.
Claim 10
Dependent Claim
31 words
An apparatus as defined in claim 6, including an additional slit provided in said prism and aligned with said scattered light detector for providing a passage for said scattered light beam.
Claim 11
Dependent Claim
20 words
An apparatus as defined in claim 6, including means for absorbing said laser beam after it traversed the scattering volume.
Claim 12
Independent Claim
157 words
An apparatus for the rapid measuring of the angular dependence of light scattered from a scattering volume containing particles, particularly those forming a cluster jet which has a main axis, comprising in combination: a. means for generating a laser beam and for directing the laser beam stationarily into the scattering volume for traversing the same and for generating light scattered by a scattering volume; b. a stationary reflecting surface disposed at least partially about said main axis for reflecting the scattered light emanating from the scattering volume; c. a rotating mirror for rotatingly reflecting the scattered light reflected from said stationary reflecting surface; d. at least one stationarily supported slit disposed space from said rotating mirror for transmitting a scattered light beam of the scattered light rotated by said mirror; and e. a scattered light detector disposed stationarily with respect to said main axis and in alignment with said slit for receiving therefrom said scattered light beam.
Claim 13
Independent Claim
157 words
An apparatus for the rapid measuring of the angular dependence of light scattered from a scattering volume containing particles, particularly those forming a cluster jet which has a main axis, comprising in combination: a. means for generating a laser beam and for directing the laser beam stationarily into the scattering volume for traversing the same and for generating light scattered by a scattering volume; b. a stationary reflecting surface disposed at least partially about said main axis for reflecting the scattered light emanating from the scattering volume; c. a rotating mirror for rotatingly reflecting the scattered light reflected from said stationary reflecting surface; d. at least one stationarily supported slit disposed space from said rotating mirror for transmitting a scattered light beam of the scattered light rotated by said mirror; and e. a scattered light detector disposed stationarily with respect to said main axis and in alignment with said slit for receiving therefrom said scattered light beam.
Claim 14
Dependent Claim
74 words
An apparatus as defined in claim 9, wherein said reflecting surface is formed of an elliptical cylinder mirror having a first focal axis contained in said rotating mirror, said rotating mirror further contains the point of intersection between said first focal axis and a plane containing both said laser beam and said scattered light beam; said elliptical cylinder mirror further having a second focal axis coinciding with said main axis of the scattering volume.
Claim 15
Independent Claim
196 words
An apparatus for the rapid measuring of the angular dependence of light scattered from particles forming a cluster jet which has a main axis, comprising in combination: a. means for generating a first, or laser beam for directing it into the cluster jet for traversing the same and for generating light scattered by a scattering volume of the cluster jet; b. a stationarily supported slit disposed spaced from said main axis for transmitting a scattered light beam of the scattered light, said scattered light beam constituting a second beam; c. an elliptical cylinder mirror having a first focal axis and a second focal axis, said second focal axis coinciding with said main axis of the cluster jet; one of said first and second beams being reflected by said elliptical cylinder mirror; d. a rotating member containing said first focal axis and being intersected by a plane containing said laser beam and traversing said main axis, said rotating member causing said one of said first and second beams to rotate; and e. a scattered light detector disposed stationarily with respect to said main axis and in alignment with said slit for receiving therefrom said scattered light beam.
Claim 16
Independent Claim
196 words
An apparatus for the rapid measuring of the angular dependence of light scattered from particles forming a cluster jet which has a main axis, comprising in combination: a. means for generating a first, or laser beam for directing it into the cluster jet for traversing the same and for generating light scattered by a scattering volume of the cluster jet; b. a stationarily supported slit disposed spaced from said main axis for transmitting a scattered light beam of the scattered light, said scattered light beam constituting a second beam; c. an elliptical cylinder mirror having a first focal axis and a second focal axis, said second focal axis coinciding with said main axis of the cluster jet; one of said first and second beams being reflected by said elliptical cylinder mirror; d. a rotating member containing said first focal axis and being intersected by a plane containing said laser beam and traversing said main axis, said rotating member causing said one of said first and second beams to rotate; and e. a scattered light detector disposed stationarily with respect to said main axis and in alignment with said slit for receiving therefrom said scattered light beam.
Claim 17
Independent Claim
121 words
A method for the rapid measuring of the angular dependence of light scattered from particles forming a cluster jet which has a main axis, comprising the following steps: a. generating a first, or laser beam; b. directing said laser beam into said cluster jet for traversing the same and for generating light scattered by a scattering volume of the cluster jet; c. singling out one scattered light beam from the scattered light by a slit, said scattered light beam constituting a second beam; d. rotating said first beam about said main axis; e. maintaining said second beam stationary; f. sensing said scattered light beam by a scattered light detector; and g. maintaining said detector stationary with respect to said main axis.
Claim 18
Independent Claim
121 words
A method for the rapid measuring of the angular dependence of light scattered from particles forming a cluster jet which has a main axis, comprising the following steps: a. generating a first, or laser beam; b. directing said laser beam into said cluster jet for traversing the same and for generating light scattered by a scattering volume of the cluster jet; c. singling out one scattered light beam from the scattered light by a slit, said scattered light beam constituting a second beam; d. rotating said first beam about said main axis; e. maintaining said second beam stationary; f. sensing said scattered light beam by a scattered light detector; and g. maintaining said detector stationary with respect to said main axis.
Claim 19
Dependent Claim
25 words
A method as defined in claim 12, wherein said laser beam passing through said cluster jet has a constant intensity and a constant polarization state.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |