WO2012126444A1 - Optical module having multifocal imaging - Google Patents
Optical module having multifocal imaging Download PDFInfo
- Publication number
- WO2012126444A1 WO2012126444A1 PCT/DE2011/001794 DE2011001794W WO2012126444A1 WO 2012126444 A1 WO2012126444 A1 WO 2012126444A1 DE 2011001794 W DE2011001794 W DE 2011001794W WO 2012126444 A1 WO2012126444 A1 WO 2012126444A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- optical module
- electromagnetic radiation
- sensitive surface
- optical element
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/10—Bifocal lenses; Multifocal lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
- B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
- B60S1/0822—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like characterized by the arrangement or type of detection means
- B60S1/0833—Optical rain sensor
- B60S1/0844—Optical rain sensor including a camera
Definitions
- the invention relates to an optical module with multifocal imaging or with multifocal optics, for imaging two optical distance ranges on an image recording element, in particular a distance and a near range.
- a relevant optical module is used in particular in a vehicle camera.
- Driver assistance systems in motor vehicles often use a camera system, for example for detecting a wide variety of objects in the vicinity of the vehicle or for rain detection on the vehicle window.
- the camera system is usually arranged behind the windshield of the vehicle and looks in the direction of travel through it. Examples of these are vehicle cameras for detecting lane markings, night vision cameras or stereo cameras as optical distance sensors.
- vehicle cameras for detecting lane markings, night vision cameras or stereo cameras as optical distance sensors.
- stereo cameras as optical distance sensors.
- some additional elements in the optical path ie in the beam path of the incident light into the camera or the electromagnetic radiation are introduced partially.
- the additional elements make it possible to image two different distance ranges simultaneously with only one image pickup element arranged in the camera, eg a CMOS or CCD image chip.
- DE 10 2008 062 977 A1 shows an optical module with a semiconductor element as image recording element, comprising a surface sensitive to electromagnetic radiation, and an objective for projecting electromagnetic radiation onto the sensitive surface of the semiconductor element.
- an additional optical element is arranged so that a first distance range is imaged by the additional optical element in a first area of the sensitive area of the semiconductor element and in a second area of the field of view in which the additional optical element is not located, a second distance range is imaged.
- a rain detection can be implemented as a driver assistance function, namely by the bifocal optics is used to simultaneously sharp focus (ie focused) rays from a long range and beams from a close range at different locations on the semiconductor element.
- the near area is a partial area of the windshield of the vehicle.
- the optical element is generally rectangular, for example as Olasplättchen.
- the optical element is then arranged above the image pickup element such that it is located or extending only over a specific region of the image pickup element, so that two separate rectangular detection regions are defined on the image pickup element.
- driver assistance functions such as rain detection, lane detection,
- an image pickup element that is sensitive to electromagnetic radiation may be desirable to divide the surface of an image pickup element that is sensitive to electromagnetic radiation more flexibly and to carry out more complex partitions of the areas of the sensitive surface of the image pickup element.
- the invention is therefore based on the object to provide a solution with which the electromagnetic radiation sensitive surface of an image pickup element for imaging different Entfemungs Symposiume can be used flexibly and adapted for example to the respective requirements of different driver assistance functions.
- the optical module comprises at least one image recording element, with a surface sensitive to electromagnetic radiation, and at least one optical element, which is arranged in the beam path, which is incident on the sensitive surface of the image pickup elements electromagnetic radiation.
- the optical element is here in particular configured and arranged in the beam path, so that in a first region of the sensitive surface of the image pickup element electromagnetic radiation from a first distance range and in a second region of the sensitive surface of the image pickup elements electromagnetic radiation from a second distance range is mapped.
- the image of the two distance ranges is preferably carried out simultaneously and sharp, ie focused.
- the optical element is further preferably configured and arranged such that the electromagnetic radiation from the first distance region passes through the optical element, whereas the electromagnetic radiation from the second region of interest does not pass through the optical element.
- the optical element or its profile is to, preferably perpendicular to the optical axis of the optical module, configured with at least one recessed portion, through which the electromagnetic radiation from the second Entfemungs Scheme occurs.
- the optical element may further be designed such that it causes the electromagnetic radiation from the first distance range, an extension or shortening of the optical path and in particular projecting sharp image on the sensitive surface of the image pickup element or images.
- the optical axis can be understood in particular to be the optical axis of an imaging system in which the optical module is integrated, for example the optical axis of an objective, behind which the optical module is arranged.
- the optical axis corresponds to an axis which runs perpendicular to the sensitive surface of the image recording element and preferably intersects the center thereof.
- the optical element can be designed with a rectangular profile, in particular perpendicular to the optical axis of the optical module.
- the rectangular profile preferably has at least one recessed portion.
- the at least one recessed portion of the optical element in particular when the optical element is formed with a rectangular profile, also designed to be rectangular and arranged, for example, in the middle at an outer edge of the optical element.
- the at least one stored portion of the optical element is formed such that it has a profile perpendicular to the optical axis of the optical module, which differs from the shape of a rectangle, advantageously in an flexibly to the requirements of or several driver assistance functions can be entered, which are to be realized by means of the optical module and complex divisions of the sensitive surface of the image pickup element can be made.
- the mapping of two distance ranges on the sensitive surface of the image recording element can be used in particular for implementing at least two different driver assistance functions by means of the optical module, for example if the optical module is used in a vehicle as environment sensor and the image data obtained by means of the optical module from the environment of one or several driver assistance systems in the vehicle for the implementation of assistance functions further processed or reused.
- the at least one recessed part region of the optical element can in principle be of any desired design. It is particularly advantageous if the at least one recessed portion of the optical elements is configured as a function of a horizontal and / or vertical observation angle or opening angle required for the respective driver assistance function.
- a wide bottom area and the side areas of the sensitive area of the image pickup element may be desirable to use both a wide bottom area and the side areas of the sensitive area of the image pickup element to image electromagnetic radiation from a far-end optical area, such as traffic sign, object, and lane detection, and only a very small area.
- a far-end optical area such as traffic sign, object, and lane detection
- only a very small area for example, at the upper edge of the sensitive surface of the image pickup elements, for imaging electromagnetic radiation from a near optical area, for example for imaging the windshield of the vehicle and for the purpose of rain detection.
- the at least one recessed portion of the optical element may further be configured in an advantageous Heise, especially when arranged in a vehicle, adapted to the respective operating conditions, for example, when placed behind the windshield of the vehicle to the inclination angle of the disc.
- one of the distance ranges, in particular in the first range of distances is an optical distance range
- the other range of range, in particular in the second range of range is an optical proximity range
- the long-distance optical range can be, for example, an ambient region of the vehicle, for example the one in the direction of travel in the vicinity of the vehicle, and act at the optical proximity, for example, an area of the vehicle interior and / or the vehicle window.
- the optical element is a glass platelet, which is configured in particular plane-parallel and transparent.
- the plane-parallel transparent glass plate can in particular be made of high-grade boron crown glass, borosilicate glass or the like.
- the plane-parallel plate may be made of transparent plastic, for example of polycarbonate or polymethyl methacrylate (PMMA).
- Figure 1 a camera device behind a windshield of a vehicle in which an inventive optical
- Figure 2 an optical module with multifocal optics, as known from the prior art.
- Figure 3 an inventive optical module with an optical element having a rectangular profile and a, arranged in the middle of an outer edge, recessed portion.
- Figure 4 an optical module according to the invention with an optical element having a rectangular profile and has a recessed portion whose shape deviates from the shape of a rectangle.
- Figure 5 an optical module according to the invention with an optical element having a recessed portion, which is designed as a function of the inclination of a vehicle window.
- Fig. 1 shows a schematic representation of a camera device, which is arranged behind a windshield (5) of a vehicle and in an inventive optical module. Shown is the beam path of electromagnetic radiation (8,9) for a first (8) and a second (9) distance range, which are imaged by a lens (1) with the main plane (2) on the sensitive surface of an image pickup element (4) , Also shown is the field of view (10) and a lens hood (7) of the camera device and the optical axis (15) of the camera device, which in this case corresponds to the optical axis (15) of the optical module.
- the optical element (3) of the optical module within the camera apparatus between the lens (1) and the sensitive surface of the image pickup element (4) in the beam path of the electromagnetic radiation (8,9) is arranged.
- the optical element (3) is designed in this way in particular and arranged in the beam path (8,9), so that in a first region of the sensitive surface of the image recording element (4) electromagnetic radiation from a first distance region (8) and in a second region of the sensitive surface of the image pickup element (4) electromagnetic radiation from a second Entfemungs Scheme (9) are imaged.
- both distance ranges (8, 9) preferably take place simultaneously and in sharp focus, ie focused, on the sensitive surface of the image recording element.
- the image captured by the sensitive surface of the image pickup element (4) simultaneously includes a region having a sharp near-field image and a region having a deep-focus far-region image.
- the near-field image water drops (6), dirt, snowflakes or the like can be detected and classified.
- Fig. 2 shows an optical module, as it is known from the prior art.
- the optical module comprises an image pickup element (4) and an optical element (3).
- the optical element (3) is rectangular, e.g. as a glass platelet, and arranged above the image pickup element (4) such that it is or extends only over a specific region (11) of the image pickup element (4), so that two separate rectangular pickup regions (11, 12) on the image pickup element (4 ) be determined.
- a narrow strip (12) in the upper part of the sensitive area of the image pickup element (4) serves to image a near optical area, for example for rain detection, while the remaining part (11) of the sensitive area of the image pickup element (4) detects an optical area Fern Scheme is used.
- Fig. 3 shows an example of an optical module according to the invention.
- the optical module comprises an image-receiving element (4) with a surface sensitive to electromagnetic radiation, and an optical element (3) arranged in the beam path on the surface sensitive surface of the image pickup element (4) is arranged on reffenden electromagnetic radiation.
- the optical element (3) is designed and arranged in the beam path, so that in a first region (11) of the sensitive surface of the image pickup element (4) electromagnetic radiation from a first distance range and in a second region (12) of the sensitive surface of the image pickup element (4) electromagnetic radiation can be imaged from a second range of distances.
- the image of the two distance ranges is preferably carried out simultaneously and sharp, ie focused.
- the optical element (3) is further configured and arranged with a rectangular profile such that the electromagnetic radiation from the first distance range passes through the optical element (3), whereas the electromagnetic radiation from the second distance region does not pass through the optical element (FIG. 3) occurs.
- the optical element (3) or its profile is configured perpendicular to the optical axis of the optical module with a recessed portion, through which the electromagnetic radiation from the second
- the recessed portion of the optical element (3) is rectangular in this case and arranged in the middle of an outer edge of the optical element (3).
- FIG. 4 shows another example of an optical module according to the invention.
- the optical module of FIG. 4 is designed in large parts in accordance with the description of FIG. 3.
- the recessed portion of the optical element (3) is formed such that it has a profile perpendicular to the optical axis of the optical module which deviates from the shape of a rectangle.
- the optical module or the division of the sensitive area of the image pickup elements (4) can be adapted in this case, for example, specifically to the respective requirements of the driver assistance functions that are to be realized kare the optical module.
- Fig. 5 shows a preferred embodiment of the optical module according to the invention.
- the optical module of FIG. 5 is constructed in large parts in accordance with the description of FIG.
- the first area (11) of the sensitive area of the image pickup element (4) consisting of the broad upper part and the lateral areas of the sensitive area of the image pickup element (4), serves in the example of FIG. 5 for imaging electromagnetic radiation from an optical Remote area, especially for traffic sign, object and lane detection.
- the second and much smaller area (12) of the sensitive surface of the image pickup element (4) is used for imaging electromagnetic radiation from a near optical area, in this case for imaging a part of the windshield of the vehicle in which the optical device can be arranged, in particular for the purpose of rain detection.
- the optical module of FIG. 5 is shown in FIG. 5 by the image recording element (4).
- the recessed portion of the optical element (3) is adapted in this case to the operating conditions of the vehicle, in particular to the angle of inclination of the windshield.
- the active region (14) for rain detection ie that subregion (14) of the entire region (12) in which the image of the optical proximity region takes place and thus the subregion (14) which actually images the vehicle window sharply and thus for rain detection can be used in the inventive module according to FIG. 5 in an advantageous manner depending on the angle of inclination of the vehicle window to get voted.
- the active region (14) migrates in the vertical direction within the area (12) of the sensitive surface of the image recording element (4) in which the near-field imaging takes place, depending on the angle of inclination of the windshield.
- Fig. 5 also a transition region (13) is shown, which lies between the two region (11,12).
- the design of the optical module according to FIG. 5 can be equal to several requirements of
- Driver assistance functions take into account, which can be realized with the optical module.
- a small area (12) of the sensitive surface of the image pickup elements (4) is used for rain detection, since usually only a small area is required for this function.
- the larger area (11) of the sensitive area of the image pickup element (4) serves to detect the far areas.
- more puncture surface of the image pickup element (4) is thus available in the image processing, for example for the detection of the left and right lane markings or boundaries.
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112011103284T DE112011103284A5 (en) | 2011-03-22 | 2011-10-01 | Optical module with multifocal imaging |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011014749 | 2011-03-22 | ||
DE102011014749.7 | 2011-03-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012126444A1 true WO2012126444A1 (en) | 2012-09-27 |
Family
ID=45560605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2011/001794 WO2012126444A1 (en) | 2011-03-22 | 2011-10-01 | Optical module having multifocal imaging |
Country Status (2)
Country | Link |
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DE (1) | DE112011103284A5 (en) |
WO (1) | WO2012126444A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006184844A (en) * | 2004-12-03 | 2006-07-13 | Tochigi Nikon Corp | Image forming optical system and imaging apparatus using the same |
DE102008062977A1 (en) | 2008-12-23 | 2010-06-24 | Adc Automotive Distance Control Systems Gmbh | Optical module with multifocal optics for the detection of distance and near range in one image |
WO2011003381A1 (en) * | 2009-07-06 | 2011-01-13 | Conti Temic Microelectronic Gmbh | Optical module for simultaneously focusing on two fields of view |
-
2011
- 2011-10-01 WO PCT/DE2011/001794 patent/WO2012126444A1/en active Application Filing
- 2011-10-01 DE DE112011103284T patent/DE112011103284A5/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006184844A (en) * | 2004-12-03 | 2006-07-13 | Tochigi Nikon Corp | Image forming optical system and imaging apparatus using the same |
DE102008062977A1 (en) | 2008-12-23 | 2010-06-24 | Adc Automotive Distance Control Systems Gmbh | Optical module with multifocal optics for the detection of distance and near range in one image |
WO2011003381A1 (en) * | 2009-07-06 | 2011-01-13 | Conti Temic Microelectronic Gmbh | Optical module for simultaneously focusing on two fields of view |
Also Published As
Publication number | Publication date |
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DE112011103284A5 (en) | 2013-07-11 |
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