DE10261973B4 - Optical system for a camera and method for its production - Google Patents
Optical system for a camera and method for its production Download PDFInfo
- Publication number
- DE10261973B4 DE10261973B4 DE10261973A DE10261973A DE10261973B4 DE 10261973 B4 DE10261973 B4 DE 10261973B4 DE 10261973 A DE10261973 A DE 10261973A DE 10261973 A DE10261973 A DE 10261973A DE 10261973 B4 DE10261973 B4 DE 10261973B4
- Authority
- DE
- Germany
- Prior art keywords
- tube
- lens
- image sensor
- length
- holder
- 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.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 10
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 10
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001419 dependent effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00403—Producing compound lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0073—Optical laminates
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Lens Barrels (AREA)
Abstract
Optisches
System für
eine Kamera bestehend aus mindestens einer Linse (1) einem Bildsensor
(4) und einem Tubus (2),
– wobei
die Linse (1) und der die Linse (1) und den Bildsensor (4) haltende
Tubus (2) aus Kunststoff hergestellt sind,
– wobei der Bildsensor (4)
in der Fokusebene der Linse (1) angeordnet ist,
– wobei
für zumindest
einen Teilbereich des Tubus (2) ein Material vorgesehen ist, das
einen auf das Material der Linse (1) abgestimmten thermischen Ausdehnungskoeffizienten
derart aufweist, daß eine
durch Temperaturänderungen bedingte Änderung
der Linsenbrennweite durch eine thermische Längenänderung des Tubus (2) dahingehend
kompensiert wird, daß der
vom Tubus (2) gehaltene Bildsensor (4) in einem bestimmten Temperaturbereich
immer zumindest nahezu in der Fokusebene angeordnet ist,
– wobei
die Linse (1) indirekt über
einen Linsenhalter (6) von dem Tubus (2) gehalten wird,
– wobei
das Material des Tubus (2) einen größeren thermischen Ausdehnungskoeffizienten
aufweist als...Optical system for a camera comprising at least one lens (1), an image sensor (4) and a tube (2),
- wherein the lens (1) and the lens (1) and the image sensor (4) holding the tube (2) are made of plastic,
- wherein the image sensor (4) is arranged in the focal plane of the lens (1),
- Wherein for at least a portion of the tube (2) a material is provided which has a matched to the material of the lens (1) thermal expansion coefficient such that a change in temperature caused by change in the lens focal length by a thermal change in length of the tube (2) to that effect it is compensated for that the image sensor (4) held by the tube (2) is always arranged at least almost in the focal plane within a certain temperature range,
- wherein the lens (1) is indirectly held by a lens holder (6) of the tube (2),
- The material of the tube (2) has a greater coefficient of thermal expansion than ...
Description
Die
Erfindung betrifft ein optisches System für eine Kamera bestehend aus
mindestens einer Linse und einem die Linse und den Bildsensor haltendenden
Tubus. Ein derartiges System ist aus der
In
der
In der Druckschrift JP 58-7109 A wird zur Lösung dieses Problems vorgeschlagen, den Bildsensor auf einem Material anzuordnen, das einen auf das Material der Linse abgestimmten thermischen Ausdehnungskoeffizienten aufweist, und zwar derart abgestimmt, daß eine durch Temperaturänderungen bedingte Änderung der Linsenbrennweite durch eine thermische Längenänderung dieses Materials zumindest weitgehend kompensiert wird.In JP 58-7109 A is proposed to solve this problem, to arrange the image sensor on a material that is one on the Material of the lens tuned thermal expansion coefficient has, and so tuned that a change caused by temperature changes the lens focal length by a thermal change in length of this material, at least is largely compensated.
Da
die zur Kompensation zur Verfügung
stehende Tubuslänge
bei einer gattungsgemäßen Anordnung
gemäß
Darüber hinaus
ist es aus dem Stand der Technik (
Aufgabe der Erfindung ist es, die Kompensation der temperaturabhängigen. Brennweitenänderung optischer Systeme weiterzuentwickeln, so dass eine Kompensation über einen weiten Temperaturbereich möglich ist.task The invention is the compensation of the temperature-dependent. Zooming optical systems, so that a compensation over a wide temperature range possible is.
Zu diesem Zweck ist es erfindungsgemäß vorgesehen, daß die Linse indirekt über einen Linsenhalter von dem Tubus gehalten wird, so daß die Linse über den Linsenhalter axial innenliegend, beabstandet vom Tubusende im Tubus angeordnet ist. Die Länge des Tubus kann dann größer sein als die Brennweite der Linse, also größer als der Abstand zwischen Linse und Bildsensor. Auf diese Weise wird die erfindungsgemäß wirksame Länge des Tubus vergrößert. Dies bewirkt nun wiederum eine Kompensationsmöglichkeit für größere Brennweitenänderungen, da die thermische Längenänderung proportional zum thermischen Ausdehnungskoeffizienten und proportional zur Länge des Tubus selbst ist. Damit dies funktioniert, muß jedoch für den Linsenhalter ein Material verwendet werden, das sich im Vergleich zum Material des Tubus vergleichsweise wenig thermisch ausdehnt. Mit anderen Worten wird über den Linsenhalter eine Faltung der optischen Systems bewirkt, so daß trotz des vorteilhaft längeren Tubus der Abstand zwischen Linse und Bildsensor wieder der Brennweite entspricht.To For this purpose, it is inventively provided that the lens indirectly via a lens holder is held by the tube, so that the lens over the Lens holder axially inside, spaced from the tube end in the tube is arranged. The length of the tube can then be larger as the focal length of the lens, that is greater than the distance between Lens and image sensor. In this way, the invention is effective Length of the Enlarged tube. This in turn causes a compensation option for larger focal length changes, because the thermal change in length proportional to the thermal expansion coefficient and proportional to the length of the tube itself. For this to work, however, must for the Lens holder can be used a material that differs from the Material of the tube comparatively little thermally expands. With other words will be over the lens holder causes a folding of the optical system, so that despite the advantageous longer Tube the distance between lens and image sensor again the focal length equivalent.
Alternativ oder zusätzlich zum Linsenhalter kann die Faltung des optischen Systems auch durch einen Bildsensorhalter realisiert werden, über den der Bildsensor indirekt mit dem Tubus verbunden und gehalten ist, so daß der Bildsensor über den Bildsensorhalter axial innenliegend, beabstandet vom Tubusende im Tubus angeordnet ist. Dabei gilt für das Material des Bildsensorhalters im Vergleich zum Tubusmaterial das gleiche wie für das Material des Linsenhalters.alternative or additionally to the lens holder, the folding of the optical system by a Image sensor holder can be realized, via which the image sensor indirectly connected to the tube and held, so that the image sensor on the Image sensor holder axially inside, spaced from the tube end in Tube is arranged. The same applies to the material of the image sensor holder the same as for the material of the lens holder compared to the tube material.
Als Tubusmaterial sind dabei zum Beispiel besonders Polyamide geeignet, die einen besonders hohen thermischen Ausdehnungskoeffizienten von ca. 20 × 10-5/K haben.For example, polyamides which have a particularly high coefficient of thermal expansion of about 20 × 10 -5 / K are suitable as tube material.
Als Kunststoffmaterial für die Linse wird vorzugsweise Polymethylmethacrylat (PMMA), ein PMMA-Copolymerisat, ein Cycloolefin-Copolymer (COC) und/oder Polycarbonat (PC) verwendet. Zum Abspritzen des Tubus wird-vorzugsweise ein eingefärbtes Kunststoffmaterial verwendet.When Plastic material for the lens is preferably polymethyl methacrylate (PMMA), a PMMA copolymer, a cycloolefin copolymer (COC) and / or polycarbonate (PC) is used. For spraying the tube is-preferably a colored plastic material used.
Anhand der beigefügten Zeichnungen soll die Erfindung nachfolgend veranschaulicht werden. Es zeigt:Based the attached Drawings, the invention will be illustrated below. It shows:
Um
die thermisch bedingte Brennweitenänderung der Linse (
Um
die temperaturabhängige Änderung
der Linsenbrennweite stärker
kompensieren zu können, sind
erfindungsgemäß „gefaltete" optische Systeme vorgesehen.
Während
die Tubuslänge
gemäß dem Stand
der Technik (
- 11
- Linselens
- 22
- Tubustube
- 33
- Aperturblendeaperture
- 44
- Bildsensorimage sensor
- 55
- Leiterplatte für den Bildsensor circuit board for the image sensor
- 66
- Linsenhalterlens holder
- 77
- BildsensorhalterImage sensor holder
- 88th
- Optische Achseoptical axis
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10220671A DE10220671B4 (en) | 2002-05-10 | 2002-05-10 | Optical system for a camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10220671A DE10220671B4 (en) | 2002-05-10 | 2002-05-10 | Optical system for a camera |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10261973A1 DE10261973A1 (en) | 2004-01-29 |
DE10261973B4 true DE10261973B4 (en) | 2006-04-20 |
Family
ID=29795798
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10261974A Ceased DE10261974A1 (en) | 2002-05-10 | 2002-05-10 | Plastic lens and method for producing a plastic lens |
DE10261973A Expired - Fee Related DE10261973B4 (en) | 2002-05-10 | 2002-05-10 | Optical system for a camera and method for its production |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10261974A Ceased DE10261974A1 (en) | 2002-05-10 | 2002-05-10 | Plastic lens and method for producing a plastic lens |
Country Status (1)
Country | Link |
---|---|
DE (2) | DE10261974A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2299920T3 (en) | 2005-06-22 | 2008-06-01 | F. Hoffmann-La Roche Ag | ANALYTICAL SYSTEM FOR ANALYSIS OF A SAMPLE IN AN ANALYTICAL TEST ELEMENT. |
DE102006062066A1 (en) * | 2006-12-29 | 2008-07-03 | Osram Opto Semiconductors Gmbh | Lens arrangement for light emitting diode display device, has lens with lens surface and optical axis, which penetrates lens surface of lens |
CN101548151B (en) | 2007-05-21 | 2013-08-07 | 微-埃普西龙测量技术有限两合公司 | Method for compensating for temperature related measurement errors in a confocal chromatic measuring distance sensor |
DE102008027721A1 (en) * | 2008-06-11 | 2009-12-17 | Hella Kgaa Hueck & Co. | Optical system with a device for compensation of thermal influences |
DE102008047277A1 (en) * | 2008-09-16 | 2010-04-15 | Hella Kgaa Hueck & Co. | Optical device for use as fixed focus camera system that is utilized as image pickup camera in motor vehicle, has compensation body provided with material including thermal expansion coefficient |
EP3042229B1 (en) | 2013-09-03 | 2023-06-28 | Veoneer Sweden AB | Camera module for a motor vehicle and method of mounting a camera module |
EP2942938B1 (en) | 2014-05-07 | 2021-01-27 | Veoneer Sweden AB | Camera module for a motor vehicle and method of pre-focusing a lens objective in a lens holder |
EP4177654A1 (en) | 2016-09-01 | 2023-05-10 | Arriver Software AB | Camera module for a motor vehicle |
EP4148484A1 (en) * | 2021-09-08 | 2023-03-15 | Robert Bosch GmbH | Imaging apparatus with axial focal distance athermalization |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE339895C (en) * | 1918-10-09 | 1921-08-17 | Optique Et De Mecanique De Hau | Arrangement to compensate for temperature influences on the true or apparent focal length of optical elements |
JPS6482934A (en) * | 1987-09-24 | 1989-03-28 | Sunstar Engineering Inc | Foamed sheet for leather mode vacuum molding |
JPH095871A (en) * | 1995-06-23 | 1997-01-10 | Minolta Co Ltd | Image photographic device |
JPH10133087A (en) * | 1996-10-31 | 1998-05-22 | Nec Corp | Focus position temperature variation compensating device |
DE19842828A1 (en) * | 1998-09-18 | 2000-03-23 | Volkswagen Ag | Optical system casing very suitable for digital cameras, is pressed entire from transparent material to integrate lens, with treatment making casing opaque in design offering diversity of applications in vehicles and craft |
JP2001272587A (en) * | 2000-03-24 | 2001-10-05 | Konica Corp | Photographing lens unit |
JP2002014269A (en) * | 2000-06-29 | 2002-01-18 | Sony Corp | Optical device |
-
2002
- 2002-05-10 DE DE10261974A patent/DE10261974A1/en not_active Ceased
- 2002-05-10 DE DE10261973A patent/DE10261973B4/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE339895C (en) * | 1918-10-09 | 1921-08-17 | Optique Et De Mecanique De Hau | Arrangement to compensate for temperature influences on the true or apparent focal length of optical elements |
JPS6482934A (en) * | 1987-09-24 | 1989-03-28 | Sunstar Engineering Inc | Foamed sheet for leather mode vacuum molding |
JPH095871A (en) * | 1995-06-23 | 1997-01-10 | Minolta Co Ltd | Image photographic device |
JPH10133087A (en) * | 1996-10-31 | 1998-05-22 | Nec Corp | Focus position temperature variation compensating device |
DE19842828A1 (en) * | 1998-09-18 | 2000-03-23 | Volkswagen Ag | Optical system casing very suitable for digital cameras, is pressed entire from transparent material to integrate lens, with treatment making casing opaque in design offering diversity of applications in vehicles and craft |
JP2001272587A (en) * | 2000-03-24 | 2001-10-05 | Konica Corp | Photographing lens unit |
JP2002014269A (en) * | 2000-06-29 | 2002-01-18 | Sony Corp | Optical device |
Also Published As
Publication number | Publication date |
---|---|
DE10261974A1 (en) | 2004-02-05 |
DE10261973A1 (en) | 2004-01-29 |
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