EP1955535A1 - Fokalebene und verfahren zur justage einer solchen fokalebene - Google Patents
Fokalebene und verfahren zur justage einer solchen fokalebeneInfo
- Publication number
- EP1955535A1 EP1955535A1 EP06829525A EP06829525A EP1955535A1 EP 1955535 A1 EP1955535 A1 EP 1955535A1 EP 06829525 A EP06829525 A EP 06829525A EP 06829525 A EP06829525 A EP 06829525A EP 1955535 A1 EP1955535 A1 EP 1955535A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- focal plane
- modules
- photosensitive
- sensors
- photosensitive components
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
- G01C11/02—Picture taking arrangements specially adapted for photogrammetry or photographic surveying, e.g. controlling overlapping of pictures
-
- 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
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
Definitions
- the invention relates to a focal plane for an optical sensor system and to a method for adjusting such a focal plane.
- High-resolution cameras with photosensitive semiconductor sensors are used, for example, for aerial photography, where they replace conventional aircraft cameras with large format films.
- the photosensitive semiconductor sensors are formed, for example, as CCD components.
- CCD components Recently, so-called CMOS cameras have been developed.
- CMOS cameras have been developed.
- These and similar sensors can be generally referred to as photosensitive semiconductor sensors, wherein the problems described below of CCD devices apply mutatis mutandis to the other photosensitive semiconductor sensors.
- the CCD component designed as a line or matrix is arranged in the film plane, the so-called focal plane, thereby saving the intermediate step of film development which is necessary in conventional film cameras. All image information is available online and in real time digitally.
- the replacement of the film of an aerial camera by a CCD plane equipped with the focal plane brings with it various difficulties.
- a focal plane plate for a high-resolution camera with photosensitive sensors consisting of an electrically non-conductive material for receiving housed photosensitive semiconductor sensors, being arranged on the focal plane plate adjusting elements to the arrangement points of the housing of the photosensitive semiconductor sensors or the focal plane plate is formed with adjusting elements, wherein the adjusting elements are complementary to the shape of the housing mechanically adjustable.
- a disadvantage of the known focal plane plate that the adaptation is very expensive.
- the invention is therefore based on the technical problem of providing a focal plane, by means of which photosensitive components can be adjusted to each other easier and to provide an associated method.
- the focal plane plate is formed in several parts from modules, wherein the photosensitive components are divided into the modules and connected to these, wherein the individual modules are arranged in a common focal plane frame.
- the individual photosensitive sensors with their associated modules individually adjustable in relation to the optics and calibrated, the modules can then be fixed to the focal plane frame then.
- the photosensitive sensors are easily adaptable to the respective boundary conditions defined by the optical components and / or the user specified boundary conditions such as focal length, stereo angle, aberrations.
- aberrations of the optics can be compensated, for example, the chromatic aberration, ie the wavelength-dependent shift of the focal point. If, for example, the Sensors operated as R, G and B line sensors, so the respective line can be moved along the optical axis, so that the line for the relevant color or wavelength is exactly in the film plane.
- the focal plane frame is rigidly connected to an optical system of the optical sensor system. This ensures that the adjustment and calibration is performed on the entire system and does not change by changing the mounting position of the optics.
- the modules are formed with a heat sink and / or connected to a heat sink to dissipate the resulting electrical heat loss.
- the heat sink is formed, for example, as a heat pipe.
- each module is assigned exactly one photosensitive component, so that each component is individually adjusted and calibrated.
- two or more photosensitive components can be arranged together on a module, for example because they are not critical with respect to the calibration or behave almost the same.
- the modules are formed of different materials. This makes it possible to use different sensors to which the material of the module, for example, in terms of thermal expansion, can be optimally adapted.
- CCD or CMOS line sensors can be used as the photosensitive sensors.
- TDI time-delay-and-integration
- MCT Mercury-Cadmium-Telluride
- matrix sensors or other shapes are also conceivable in principle.
- the individual components are adjusted and calibrated and then fixed to the focal plane frame, the fixation preferably a insoluble, rigid connection realized.
- the adjustment and calibration preferably takes place with the aid of static and / or dynamic light modulators.
- sequences of images are thrown onto the components by an evaluation and control unit via the light modulators and the result is checked by reading the components through the evaluation and control unit.
- the modules can be moved until they are properly adjusted and then calibrated.
- the invention will be explained in more detail below with reference to a preferred embodiment.
- the single figure shows a schematic representation of a focal plane.
- the focal plane 1 comprises a focal plane frame 2, three modules 3, three line sensors 4 arranged on the modules 3, and one drive and readout electronics 5 for each line sensor 4.
- the line sensors 4 are permanently connected to the associated modules 3.
- the row sensors 4 are connected to the drive and readout electronics 5, for example, these are soldered together or connected to each other via a plug connection.
- the modules 3 themselves are initially movably mounted in the focal plane frame 2.
- the modules 3 can be stored in a liquid adhesive layer, so that they can be moved in all three translational degrees of freedom prior to curing of the adhesive.
- the focal plane frame 2 is now rigidly connected to an optic 6 via a holder, not shown.
- one or more test structures is now imaged on the first line sensor 4 via the optics 6. Subsequently, the line sensor 4 is read out by the drive and read-out electronics 5. The result can then be used to determine the misalignment of the line sensor 4 and to correct for example by means of a micromanipulator. Subsequently, the geometric, radiometric and / or spectral calibration of the line sensor 4 can then take place. This procedure is then repeated for the other modules 3. Finally, the adhesive is cured. Of course, the adhesive of a module 3 can be cured before the adjustment of the next module 3 takes place. As an alternative to the adhesive, the modules 3 can also be stored and adjusted by means of piezoelectric actuators, wherein after the adjustment the modules 3 are cast with epoxy resin.
- the adjustment and calibration is preferably carried out by means of static and / or dynamic light modulators, wherein the dynamic light modulators can be controlled by an evaluation and control unit for generating different imaging regulations.
- the dynamic light modulators can be designed as an LCD matrix, micro-mirror array and / or as a membrane mirror.
- the evaluation and control unit is connected to the drive and readout electronics of the line sensors.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Signal Processing (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Solid State Image Pick-Up Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2006/011939 WO2008071203A1 (de) | 2006-12-12 | 2006-12-12 | Fokalebene und verfahren zur justage einer solchen fokalebene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1955535A1 true EP1955535A1 (de) | 2008-08-13 |
Family
ID=38024137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06829525A Withdrawn EP1955535A1 (de) | 2006-12-12 | 2006-12-12 | Fokalebene und verfahren zur justage einer solchen fokalebene |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1955535A1 (de) |
| WO (1) | WO2008071203A1 (de) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19932065C2 (de) * | 1998-08-18 | 2003-06-26 | Deutsch Zentr Luft & Raumfahrt | Fokalebenenplatte für eine hochauflösende Kamera mit lichtempfindlichen Halbleitersensoren |
| DE10228882A1 (de) * | 2002-06-27 | 2004-02-19 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Verfahren und Vorrichtung zur Kalibrierung von hochgenauen photosensitiven Sensoren |
-
2006
- 2006-12-12 EP EP06829525A patent/EP1955535A1/de not_active Withdrawn
- 2006-12-12 WO PCT/EP2006/011939 patent/WO2008071203A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008071203A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008071203A1 (de) | 2008-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20080229 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
|
| 17Q | First examination report despatched |
Effective date: 20081128 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ECKARDT, ANDREAS Inventor name: BOERNER, ANKO Inventor name: HILBERT, STEFAN Inventor name: WALTER, INGO |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): FR GB IT |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Effective date: 20161221 |