DE102009013698A1 - Use of beam splitter in e.g. digital camera system, using filter provided in front of sensors for producing light intensities on targets of sensors, where splitter divides incident light into unequal parts with same spectral composition - Google Patents

Use of beam splitter in e.g. digital camera system, using filter provided in front of sensors for producing light intensities on targets of sensors, where splitter divides incident light into unequal parts with same spectral composition Download PDF

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Publication number
DE102009013698A1
DE102009013698A1 DE102009013698A DE102009013698A DE102009013698A1 DE 102009013698 A1 DE102009013698 A1 DE 102009013698A1 DE 102009013698 A DE102009013698 A DE 102009013698A DE 102009013698 A DE102009013698 A DE 102009013698A DE 102009013698 A1 DE102009013698 A1 DE 102009013698A1
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Germany
Prior art keywords
sensors
splitter
digital camera
exposure
camera system
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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Withdrawn
Application number
DE102009013698A
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German (de)
Inventor
Hans Haesler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HAESSLER, HANS-HELMUT, 53177 BONN, DE
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Hassler Hans
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Publication date
Application filed by Hassler Hans filed Critical Hassler Hans
Priority to DE102009013698A priority Critical patent/DE102009013698A1/en
Publication of DE102009013698A1 publication Critical patent/DE102009013698A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/45—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/205—Neutral density filters

Abstract

The splitter has a neutral density filter provided in front of sensors e.g. complementary metal oxide semiconductor sensors, to produce different light intensities on targets of the sensors. The splitter divides light incident over a lens on an image converter into unequal parts with same spectral composition. The splitter is implemented as a prism splitter without dichroic filtering. Light exposure ranges of the sensors are added by cascading to a total light exposure range of a digital camera system. The filter is provided for simultaneous production of exposure series of a recorded motive. An independent claim is also included for a method for extending light exposure range of a digital camera system.

Description

Hiermit wird die Anmeldung nachstehender Erfindung aus dem Bereich-Foto- und Filmtechnik (hier: digitales Kino) beantragt. Meine Erfindung erweitert den Belichtungsumfang eines digitalen Kamerasystems von bisher nur wenigen Blendenstufen auf ein beinahe beliebig erweiterbares Maß, das sogar den des fotochemischen Films übertrifft. Das Verfahren erzeugt erstmals beim bewegten Film sogenannte Belichtungsreihen gleichzeitig, durch nur ein Objektiv und einen Strahlenteiler auf mehrere deckungsgleiche Bildsensoren unterschiedlicher Empfindlichkeit, und dies für jedes Einzelbild und in Echtzeit. Das aus der Stillfotografie bekannte Problem, dass sich während der Erstellung von Belichtungsreihen das Motiv durch Bewegung verändern kann, wird durch die Gleichzeitigkeit der Aufnahmen bei meinem Verfahren umgangen.Herewith the application of the present invention will become and film technology (here: digital cinema) applied for. My invention extends the exposure range of a digital camera system from so far only a few f-stops on an almost arbitrarily expandable Measure, that even surpasses that of the photochemical film. The process generates for the first time with the moving film so-called exposure series simultaneously, by only one lens and a beam splitter on several congruent Image sensors of different sensitivity, and this for each Single frame and in real time. The one known from still photography Problem that is during the creation of bracketing can change the motive by movement, is due to the simultaneity of shots in my procedure bypassed.

Das Objekt wird also durch ein Objektiv und einen Prismenteiler (wie wir ihn in seiner Ausführung zur Farbselektion mit dichroitischen Spiegeln aus 3-Röhren- und 3-CCD-Videokameras kennen) auf in diesem Beispiel drei CMOS-Bildwandler abgebildet. Allerdings erfolgt im Prisma kein Trennen in Farbauszüge wie bei der Videokamera sondern in unterschiedliche Belichtungsbereiche. Das Prisma hat im Bereich des sichtbaren Lichts also denselben Frequenzgang für alle drei Lichtwege zu den Sensoren, den drei nachgeschalteten CMOS-Elementen sind allerdings – und dies ist wesentlich und neu – unterschiedliche ND-Filter vorgeschaltet, die zu unterschiedlichen Belichtungen, also einer zeitgleichen Herstellung von Belichtungsreihen des aufgenommenen Motivs, führen. Dabei werden keine speziellen HDR-Bildsensoren benötigt, denn das Verfahren kaskadiert die Summe der Einzelumfänge der Sensoren, in unserem Beispiel drei Stück. Durch die Verwendung normaler, handelsüblicher Bildsensoren können bei meinem Verfahren Kosten gespart und physikalische Nachteile von HDR-Sensoren umgangen werden. Vermutlich kann die Anzahl der Sensoren auch noch über die Anzahl drei (wie in meinem Beispiel) hinaus stark erhöht werden, so ein geeigneter Lichtteiler konstruiert wird, dadurch ist eine noch weitere Steigerung des abbildbaren Helligkeitsumfangs denkbar.The Object is thus replaced by a lens and a prism divider (like we use it in its execution Color selection with dichroic mirrors from 3-tube and 3-CCD video cameras in this example three CMOS imagers are mapped. Indeed no separation takes place in the prism in separations as in the video camera but in different exposure areas. The prism has in the range of visible light, therefore, the same frequency response for all three Light paths to the sensors, the three downstream CMOS elements are however - and This is essential and new - different ND filter upstream, which at different exposures, So a simultaneous production of exposure series of the recorded Motive, lead. No special HDR image sensors are needed, because the process cascades the sum of the individual scopes of the sensors, in ours Example three pieces. By the use of normal, commercial image sensors can saved my process costs and physical disadvantages of HDR sensors are bypassed. Presumably, the number of sensors can also still over the number three (as in my example) are greatly increased, so a suitable light divider is constructed, this is one even further increase of the imagable range of brightness conceivable.

Claims (2)

Die Verwendung eines Strahlenteilers, der seiner Bauart nach geeignet ist, das über ein Objektiv einfallende Licht auf mehrere Bildwandler zu ungleichen Teilen bei gleicher spektraler Zusammensetzung zu verteilen, mit dem Ziel der Herstellung einer Belichtungsreihe durch unterschiedlich starke Beleuchtungsstärken auf den Bildwandlern mit demselben Bildinhalt zur selben Zeit. Der Strahlenteiler muss zu diesem Zweck als Prismenteiler ohne dichroitische Filterung, d. h. ohne Farbselektion ausgeführt werden. Zur Erzeugung der unterschiedlichen Leuchtdichten auf den Targets der Sensoren sind verschieden starke ND-Filter vor den deckungsgleich dasselbe Bild erhaltenden Sensoren (drei CCDs oder CMOS-Sensoren) vorgesehen. Die technisch-konstruktiv gegebenen Einzelbelichtungsumfänge der drei Sensoren addieren sich durch Kaskadierung zu einem Gesamtbelichtungsumfang des Systems, der gegenüber den Einzelumfängen insofern erweitert ist, dass er etwa die Summe der Einzelumfänge aller Sensoren darstellt. Ich schlage dabei ausdrücklich ein Mehr-Bildwandler-Verfahren vor, ohne mich schon hierauf die Anzahl drei festzulegen, denn eine Erhöhung der Anzahl an Sensoren kann geeignet sein, den Belichtungsumfang weiter zu erhöhen und damit den des chemischen Films zu übertreffen.The use of a beam splitter, his Type is suitable for that over a lens incident light on multiple imagers to unequal Distribute parts with the same spectral composition, with the goal of making an exposure series by different strong illuminance on the image converters with the same image content at the same time. Of the Beam splitter must for this purpose as a prism divider without dichroic Filtering, d. H. run without color selection. To generate the different Luminances on the targets of the sensors are different strong ND filter in front of the congruent same image receiving sensors (three CCDs or CMOS sensors) intended. The technical-constructively given individual exposure amounts of three sensors are added by cascading to a total exposure range of the system, opposite the individual circumferences is extended so that it is about the sum of the individual scopes of all Represents sensors. I specifically suggest a multi-image converter process before, without me already set the number three, because one increase the number of sensors may be appropriate to the amount of exposure continue to increase and to surpass that of the chemical film. Besonders unter Schutz gestellt werden soll die „Gleichzeitigkeit” der Herstellung der Einzelaufnahmen für die Belichtungsreihe. Eine herkömmliche Reihenaufnahme zur Erzeugung einer Belichtungsreihe geschieht durch den bedienenden Fotografen nacheinander mittels mehrerer Aufnahmen. Bei meinem Verfahren geschieht dies gleichzeitig und ist dadurch erstmals für die Anwendung bei Bewegtbildern (Kino, Fernsehen) geeignet, weil sich der Bildinhalt der einzelnen zur Belichtungsreihe zusammenzufügenden Aufnahmen nicht mehr durch Bewegungen des Motivs zwischen den Aufnahmen verändern kann. Das Verfahren habe ich speziell für den Bereich des digitalen Kinos vorgesehen und kann bei digitalen Kamerasystemen eingesetzt werden.Particularly protected is the "simultaneity" of production the single shots for the bracketing. A conventional series shot to create an exposure series happens by the operator Photographers one after another using multiple shots. In my process this happens simultaneously and is thus for the first time for the application with moving pictures (cinema, television) suitable, because the picture content of the individual shots to be combined to the bracketing no longer can change between motions due to movements of the subject. The I have special procedures for provided the field of digital cinema and can be used in digital camera systems be used.
DE102009013698A 2009-03-20 2009-03-20 Use of beam splitter in e.g. digital camera system, using filter provided in front of sensors for producing light intensities on targets of sensors, where splitter divides incident light into unequal parts with same spectral composition Withdrawn DE102009013698A1 (en)

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DE102009013698A DE102009013698A1 (en) 2009-03-20 2009-03-20 Use of beam splitter in e.g. digital camera system, using filter provided in front of sensors for producing light intensities on targets of sensors, where splitter divides incident light into unequal parts with same spectral composition

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DE102009013698A1 true DE102009013698A1 (en) 2010-12-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015107406A1 (en) * 2015-05-12 2016-11-17 Connaught Electronics Ltd. Camera for a motor vehicle with at least two light guides and an optical filter element, driver assistance system and motor vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015107406A1 (en) * 2015-05-12 2016-11-17 Connaught Electronics Ltd. Camera for a motor vehicle with at least two light guides and an optical filter element, driver assistance system and motor vehicle

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OP8 Request for examination as to paragraph 44 patent law
OR8 Request for search as to paragraph 43 lit. 1 sentence 1 patent law
8127 New person/name/address of the applicant

Owner name: HAESSLER, HANS-HELMUT, 53177 BONN, DE

R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20111001