CA2452600A1 - Holographic optical element - Google Patents
Holographic optical element Download PDFInfo
- Publication number
- CA2452600A1 CA2452600A1 CA002452600A CA2452600A CA2452600A1 CA 2452600 A1 CA2452600 A1 CA 2452600A1 CA 002452600 A CA002452600 A CA 002452600A CA 2452600 A CA2452600 A CA 2452600A CA 2452600 A1 CA2452600 A1 CA 2452600A1
- Authority
- CA
- Canada
- Prior art keywords
- holographic optical
- optical element
- wave front
- interference patterns
- monochromatic
- Prior art date
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract 14
- 230000001427 coherent effect Effects 0.000 claims abstract 6
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/10—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving
- G01B11/105—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving using photoelectric detection means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2433—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring outlines by shadow casting
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/32—Holograms used as optical elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
A holographic optical element is provided for measuring the dimension and position of an object with aid of a deflected laser beam generated by a monochromatic and coherent laser light source that sweeps across an angular range to produce a fan-shaped reference wave front. The element includes at least two interference patterns. Each interference pattern is created through simultaneous exposure of the element to the fan-shaped reference wave front generated by the monochromatic and coherent laser light source and a parallel partial wave front generated by the same monochromatic and coherent laser light source and hitting the element at a different angle than the reference wave front. The number of parallel partial wave fronts used for the exposure of the element corresponds to the number of interference patterns, and if the parallel partial wave fronts are virtually extended through the holographic optical element, they intersect behind the element in a center of a measuring field.
Claims (11)
1. ~A holographic optical element far measuring at least one of the dimension and position of an object with aid of a deflected laser beam generated by a monochromatic and coherent laser light source that sweeps across an angular range to produce a fan-shaped reference wave front, the element comprising:
at least two interference patterns, wherein each interference pattern is created through simultaneous exposure of the element to the fan-shaped reference wave front generated by the monochromatic and coherent laser light source and a parallel partial wave front generated by the same monochromatic and coherent laser light source and hitting the element at a different angle than the reference wave front, wherein the number of parallel partial wave fronts used for the exposure of the element corresponds to the number of interference patterns, and wherein if the parallel partial wave fronts are virtually extended through the holographic optical element, they intersect behind the element in a center of a measuring field.
at least two interference patterns, wherein each interference pattern is created through simultaneous exposure of the element to the fan-shaped reference wave front generated by the monochromatic and coherent laser light source and a parallel partial wave front generated by the same monochromatic and coherent laser light source and hitting the element at a different angle than the reference wave front, wherein the number of parallel partial wave fronts used for the exposure of the element corresponds to the number of interference patterns, and wherein if the parallel partial wave fronts are virtually extended through the holographic optical element, they intersect behind the element in a center of a measuring field.
2. The element of claim 1, wherein the at least two interference patterns comprises at least three different interference patterns.
3. The element of claim 2, wherein the at least two parallel partial wave fronts are all located in a single plane.
4. The element of claim 3, wherein an angle between the reference wave front and a common plane for the parallel partial wave fronts is 40 to 50° and a bisector of the angle is positioned perpendicular on a plane for the holographic optical element.
5. ~The element of claim 1, wherein the element includes a plurality of sections, and each section has a respective one of the interference patterns and the sections are spatially separated from another section.
6. ~The element of claim 1, wherein the at least two interference patterns at least partially overlap one another.
7. ~A measuring arrangement, comprising a transmitting part for generating a laser beam and a receiving part, wherein both parts include a holographic optical element and the holographic optical element of at least the transmitting part comprises the holographic optical element according to claim 1, said arrangement being adapted to be used to measure at least one of the dimension and position of an object with the aid of the laser beam, which is deflected so that it sweeps across a specific angular range.
8. ~The arrangement of claim 7, wherein the holographic optical element is a holographic film plate.
9. ~A method of measuring at least one of a dimension and position of an object with a laser beam that sweeps across a specific angular range, comprising utilizing the holographic optical element of any one of claims 1 to 6.
10. ~The method according to claim 9, wherein the object comprises one of a cable, profile, and a pipe.
11. ~A device for measuring at least one of the dimension and position of an object, the device comprising:
a transmitter part for generating a monochromatic light beam and a receiver part, wherein the transmitter part and the receiver part each include a holographic optical element, wherein the transmitter part includes means for deflecting the light beam in the transmitter part through an angular region onto the holographic optical element in the transmitter part, and wherein at least one of said holographic elements comprises the holographic optical element according to any one of claims 1 to 6.
a transmitter part for generating a monochromatic light beam and a receiver part, wherein the transmitter part and the receiver part each include a holographic optical element, wherein the transmitter part includes means for deflecting the light beam in the transmitter part through an angular region onto the holographic optical element in the transmitter part, and wherein at least one of said holographic elements comprises the holographic optical element according to any one of claims 1 to 6.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02027560A EP1429111A1 (en) | 2002-12-09 | 2002-12-09 | Holographic optical element having a plurality of interference patterns |
| EP02027560.8 | 2002-12-09 | ||
| EP03026493.1A EP1429112B1 (en) | 2002-12-09 | 2003-11-21 | Holographic optical element having a plurality of interference patterns |
| EP03026493.1 | 2003-11-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2452600A1 true CA2452600A1 (en) | 2004-06-09 |
| CA2452600C CA2452600C (en) | 2012-05-15 |
Family
ID=32327846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2452600A Expired - Fee Related CA2452600C (en) | 2002-12-09 | 2003-12-08 | Holographic optical element |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1429112B1 (en) |
| JP (1) | JP4334327B2 (en) |
| CA (1) | CA2452600C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100616744B1 (en) | 2005-02-25 | 2006-08-28 | (주)모비솔 | Pointing device using holographic optical element |
| DE102019206374A1 (en) | 2019-05-03 | 2020-11-05 | Audi Ag | Detection device with at least one sensor device, an evaluation device, a light source and a carrier medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5018803A (en) * | 1985-02-04 | 1991-05-28 | Robotic Vision Systems, Inc. | Three-dimensional volumetric sensor |
| CH674774A5 (en) * | 1986-04-03 | 1990-07-13 | Zumbach Electronic Ag | |
| CH683370A5 (en) * | 1992-04-10 | 1994-02-28 | Zumbach Electronic Ag | Method and apparatus for measuring the dimension of an object. |
| DE19647613C2 (en) * | 1996-11-18 | 1998-11-12 | Laser Applikationan Gmbh | Method and device for measuring the thickness of non-circular, elongated workpieces which are advanced in the direction of their longitudinal axis and which have any desired and changing angular position |
-
2003
- 2003-11-21 EP EP03026493.1A patent/EP1429112B1/en not_active Expired - Lifetime
- 2003-12-04 JP JP2003406381A patent/JP4334327B2/en not_active Expired - Fee Related
- 2003-12-08 CA CA2452600A patent/CA2452600C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2452600C (en) | 2012-05-15 |
| EP1429112A1 (en) | 2004-06-16 |
| JP2004191977A (en) | 2004-07-08 |
| EP1429112B1 (en) | 2018-03-21 |
| JP4334327B2 (en) | 2009-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20141208 |