Patent US3972618A successfully refreshed from Google Patents.
US3972618A
Expired / Lapsed
US
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Interferometer for testing materials of different sizes
Assignee: UTI SPECTROTHERM CORP
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Filing: 1974-11-18
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Granted: 1976-08-03
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Expires: 1994-11-18
Abstract
Abstract An interferometer having two spaced apart but parallel composite beams passing through respective fluid containing cells with the radiation output of these cells being imaged onto a detector. The optics at one end of the cells are made movable with respect to the optics at the other end of the cells in order to accommodate various size cells and materials, and to simplify optical alignment of the interferometer without disturbing the focusing properties of the instrument.
Inventors
- 👤 Roland C. Hawes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:58
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/45
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
An optical system for examining material, comprising: means including a first optical system for forming two spaced apart electromagnetic energy illuminating beams having axes parallel to one another and each brought to a point focus that is fixed with respect to the first optical means, thereby to form two point foci that remain fixed at a given distance apart from each other, means including a second optical system for imaging two points in space said fixed distance apart onto at least one electromagnetic energy detector, and means maintaining the fixed focus of said two parallel beams fixed for moving said first and second optical means with respect to each other in a straight line direction parallel to said focused beams and through a distance that includes a coincidence of each of the point foci of said two beams with one of said two points in space, whereby different sized materials may be positioned in the path of said parallel beams and an output beam therefrom accurately focused onto said detecting means.
Claim 2
Dependent Claim
171 words
An optical system for examining material, comprising: means including a first optical system for forming two spaced apart electromagnetic energy illuminating beams having axes parallel to one another and each brought to a point focus that is fixed with respect to the first optical means, thereby to form two point foci that remain fixed at a given distance apart from each other, means including a second optical system for imaging two points in space said fixed distance apart onto at least one electromagnetic energy detector, and means maintaining the fixed focus of said two parallel beams fixed for moving said first and second optical means with respect to each other in a straight line direction parallel to said focused beams and through a distance that includes a coincidence of each of the point foci of said two beams with one of said two points in space, whereby different sized materials may be positioned in the path of said parallel beams and an output beam therefrom accurately focused onto said detecting means.
Claim 3
Dependent Claim
96 words
The optical system according to claim 1 which additionally comprises a fluid containing cell positioned in the path of each of said two focused beams, each of said cells including a fluid chamber having optically transparent apertures on opposite walls thereof and means within each of the cells for imaging points at one aperture into points at the other aperture, each of said cells being positioned so that the point focus of its focused illuminating beam is coincident with one aperture thereof and one of said points in space is located at the output aperture thereof.
Claim 4
Dependent Claim
80 words
The optical system according to claim 1 which additionally comprises a liquid containing cell in the path of each of said focused beams, wherein said moving means is additionally positioned to make each focal point coincident with its associated one of said two points in space, each of said liquid containing cells including two parallel optically transparent members having a space therebetween for containing the liquid to be examined and being positioned with their respective illuminating beam passing directly therethrough.
Claim 5
Dependent Claim
69 words
The optical system according to claim 1 wherein said moving means comprises: a stationary frame having said second optical system imaging means fixedly mounted thereon, a platform upon which said first optical system forming means is mounted, and means for providing linear motion of said platform with respect to said base frame in a direction varying the distance separating said illuminating beam foci and said two points in space.
Claim 6
Dependent Claim
63 words
The optical system according to claim 1 wherein said first optical system forming means forms said two point foci along a line that is parallel to a line on which said two points in space are located, and further wherein said moving means maintains these lines parallel over a traveled distance that includes the simultaneous superposition of said point foci and said positions.
Claim 7
Dependent Claim
55 words
An optical system according to claim 1 wherein said first optical system includes an interferometer that comprises: a source of an electromagnetic energy beam, means splitting said beam into two substantially equal intensity components, means combining said components in a manner forming said two spaced apart electromagnetic energy illuminating beams having modulations of opposite phase.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |