EP2588913A1 - Low-noise bioccular digital vision device - Google Patents

Low-noise bioccular digital vision device

Info

Publication number
EP2588913A1
EP2588913A1 EP11728274.9A EP11728274A EP2588913A1 EP 2588913 A1 EP2588913 A1 EP 2588913A1 EP 11728274 A EP11728274 A EP 11728274A EP 2588913 A1 EP2588913 A1 EP 2588913A1
Authority
EP
European Patent Office
Prior art keywords
digital
eyepieces
sensor
noise
module
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Withdrawn
Application number
EP11728274.9A
Other languages
German (de)
French (fr)
Inventor
Georges-Olivier Reymond
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.)
Safran Electronics and Defense SAS
Original Assignee
Sagem Defense Securite SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sagem Defense Securite SA filed Critical Sagem Defense Securite SA
Publication of EP2588913A1 publication Critical patent/EP2588913A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/002Special television systems not provided for by H04N7/007 - H04N7/18
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/12Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification

Definitions

  • the present invention relates to a biocular digital vision device such as binoculars and in particular night vision binoculars.
  • night vision goggles com ⁇ having two optical channels each having a light intensifier sensor equipped with an element of resti ⁇ tution of images, such as a screen associated with a plurality of lenses to form an eye.
  • a lens or a group of lenses is generally disposed in front of the sensor to allow approximation or magnification.
  • the temporal noises between the images scattered by each eyepiece are independent and decorrelated.
  • the brain of the observer ⁇ springs to average these noises so that the image actually perceived by the observer pre ⁇ feel reduced noise compared to images presented to each eye. This equates to a quadratic averaging and allows a theoretical gain, equal to the square root of two, on the signal-to-noise ratio.
  • binoculars comprising only an optical path to the sensor and then separate therefrom to the eyepieces.
  • These binoculars then comprise a single sensor connected by a separator to each eyepiece.
  • Such binoculars comprise a single lens group and possibly a single light intensifier.
  • the images broadcast by the eyepieces are then identical so that the brain can achieve no averaging to reduce the noise present in the images. It is then necessary to provide a milking ⁇ digital to reduce noise or to use a better sensor, which is expensive.
  • An object of the invention is to obviate the aforementioned drawbacks.
  • a biocular digital vision device comprising a digital sensor connected to two image restoration elements each belonging to an eyepiece, the device comprising a delay module for establishing a time lag between the renditions of images made by the two eyepieces.
  • the same image stream is sent to both oculai ⁇ res.
  • the images simultaneously perceived by the right eye and the left eye are different because of the time shift. These images are therefore affected by noises that are decorrelated.
  • the brain can then use the images perceived simultaneously by both eyes to operate averaging to reduce noise by a factor equal to the square root of two.
  • the provisions tif ⁇ of the invention allows a better view of the images, particularly in light conditions dif- ficiles.
  • the time offset is equivalent to at least one frame of the video signal and, advantageously, the video signal has a frequency of between about 25 and 60 Hertz.
  • a frame is sufficient to obtain the desired effect without the time shift being perceptible by the observer.
  • the processing unit is connected to the eye by a signal splitter and the timer module is mounted in ⁇ be the signal splitter and one of the eyepieces.
  • This embodiment is particularly sim ⁇ ple.
  • the device may also include a digital processing device.
  • the device comprises a stabilization module and, preferably, the stabili ⁇ tion module is incorporated in the treatment member.
  • the dispo ⁇ operative part comprises a light intensifier mounted in front of the sensor.
  • the digital vision device of the invention is a biocular device comprising a housing 1 incorporating a digital processing unit 2 connected, on the one hand, to a sensor 3 and, on the other hand, with two image restoration elements 4.1, 4.2 forming eyepieces 5.1, 5.2.
  • the sensor 3 is for example a CMOS or CCD sensor.
  • a group of lenses 6 for approximation or a range of rap ⁇ close to predetermined.
  • the intensifier may be a IL tube or other member designed to amplify the light beam having passed through the lens group 6 such that the light beam impinging on the cap ⁇ tor 3 has an increased intensity compared to doing ⁇ light CWater entering the device.
  • the image rendering elements 4.1, 4.2 are OLED or LCD type screens with respect to which output lenses 7.1, 7.2 are arranged.
  • ⁇ dis tance between the screen and the exit lens 7.1, 7.2 is advantageously adjustable to allow adaptation to the view of the observer.
  • the processor 2 is arranged to emit a digital video signal to the image restitution element 4.1, 4.2 of each ocu ⁇ 5.1, 5.2.
  • the video signal has a frequency of, for example, 25 Hertz.
  • the processing member 2 further incorporates a stabilization module.
  • the treatment organ 2 is connected to the eyepieces
  • the device comprises a delay module 9 mounted between the signal separator 8 and the image recovery element 4.1.
  • the delay module 9 is arranged to establish a time shift between the image resti ⁇ tions performed by the two eyepieces 5.1,
  • the time offset is equivalent to at least one frame of the video signal.
  • the image restitution element 4.1 receives a video signal delayed by one frame by rap ⁇ port to the video signal received at the same time by the image restitution element 4.2.
  • the device may have a structure different from that described:
  • the separator is optional, two channels can leave the treatment unit,
  • the timer module can be integrated to the treatment member or of resti ⁇ tution picture element
  • the treatment unit is optional and the sensor can be connected directly to the separator 8 and, optionally, be arranged to ef ⁇ perform signal processing.
  • the device may or may not include a light intensifier, operate in visible or infrared light ...
  • the device can be twins or at ⁇ be viewing device with two eyepieces, such as a microscope.

Abstract

Bioccular digital vision device comprising a digital processing facility (2) linked, on the one hand, to a sensor (3) and, on the other hand, to two image restoration elements (4.1, 4.2) of eyepieces (5.1, 5.2) for sending a digital video signal to each eyepiece, device comprising a retarder module (9) for establishing a time shift between the restorations of images carried out by the two eyepieces.

Description

Dispositif de vision numérique bioculaire  Biocular digital vision device
à faible bruit  low noise
La présente invention concerne un dispositif de vision numérique bioculaire telle que des jumelles et no- tamment des jumelles de vision nocturne.  The present invention relates to a biocular digital vision device such as binoculars and in particular night vision binoculars.
Il est connu des jumelles de vision nocturne com¬ portant deux voies optiques comportant chacune un capteur intensificateur de lumière équipé d'un élément de resti¬ tution d'images, tel qu'un écran, associé à plusieurs lentilles, pour former un oculaire. Une lentille ou un groupe de lentilles est généralement disposé en avant du capteur pour permettre un rapprochement ou grossissement. It is known of night vision goggles com ¬ having two optical channels each having a light intensifier sensor equipped with an element of resti ¬ tution of images, such as a screen associated with a plurality of lenses to form an eye. A lens or a group of lenses is generally disposed in front of the sensor to allow approximation or magnification.
Avec ce type de jumelles, les bruits temporels entre les images diffusées par chaque oculaire sont indé- pendants et décorrélés. Le cerveau de l'observateur par¬ vient spontanément à moyenner ces bruits de telle manière que l'image effectivement perçue par l'observateur pré¬ sente un bruit réduit par rapport aux images présentées à chaque œil. Ceci équivaut à un moyennage quadratique et autorise un gain théorique, égal à la racine carrée de deux, sur le rapport signal/bruit. With this type of binoculars, the temporal noises between the images scattered by each eyepiece are independent and decorrelated. The brain of the observer ¬ springs to average these noises so that the image actually perceived by the observer pre ¬ feel reduced noise compared to images presented to each eye. This equates to a quadratic averaging and allows a theoretical gain, equal to the square root of two, on the signal-to-noise ratio.
Pour diminuer le poids et l'encombrement des ju¬ melles, il a été envisagé de réaliser des jumelles ne comprenant qu'une voie optique jusqu'au capteur puis de séparer celle-ci vers les oculaires. Ces jumelles com¬ prennent alors un unique capteur relié par un séparateur à chaque oculaire. De telles jumelles comportent un seul groupe de lentilles et éventuellement un seul intensifi- cateur de lumière. To reduce the weight and bulk of ju ¬ melles, it has been envisaged to produce binoculars comprising only an optical path to the sensor and then separate therefrom to the eyepieces. These binoculars then comprise a single sensor connected by a separator to each eyepiece. Such binoculars comprise a single lens group and possibly a single light intensifier.
Les images diffusées par les oculaires sont alors identiques de sorte que le cerveau ne peut réaliser aucun moyennage permettant de diminuer le bruit présent dans les images. Il est alors nécessaire de prévoir un traite¬ ment numérique pour diminuer le bruit ou d'utiliser un capteur de meilleure qualité, ce qui est coûteux. Un but de l'invention est d'obvier aux inconvénients précités. The images broadcast by the eyepieces are then identical so that the brain can achieve no averaging to reduce the noise present in the images. It is then necessary to provide a milking ¬ digital to reduce noise or to use a better sensor, which is expensive. An object of the invention is to obviate the aforementioned drawbacks.
A cet effet, on prévoit, selon l'invention, un dispositif de vision numérique bioculaire comportant un capteur numérique relié à deux éléments de restitution d'images appartenant chacun à un oculaire, le dispositif comprenant un module retardateur pour établir un décalage temporel entre les restitutions d' images réalisées par les deux oculaires.  For this purpose, according to the invention, there is provided a biocular digital vision device comprising a digital sensor connected to two image restoration elements each belonging to an eyepiece, the device comprising a delay module for establishing a time lag between the renditions of images made by the two eyepieces.
Le même flux d'image est envoyé aux deux oculai¬ res. Toutefois, les images simultanément perçues par l'œil droit et l'œil gauche sont différentes du fait du décalage temporel. Ces images sont donc affectées de bruits qui sont décorrélés. Le cerveau peut alors utili- ser les images perçues simultanément par les deux yeux pour opérer un moyennage permettant de réduire le bruit d'un facteur égal à la racine carrée de deux. Le disposi¬ tif de l'invention permet donc une meilleure vision des images, notamment dans des conditions de luminosité dif- ficiles. The same image stream is sent to both oculai ¬ res. However, the images simultaneously perceived by the right eye and the left eye are different because of the time shift. These images are therefore affected by noises that are decorrelated. The brain can then use the images perceived simultaneously by both eyes to operate averaging to reduce noise by a factor equal to the square root of two. The provisions tif ¬ of the invention allows a better view of the images, particularly in light conditions dif- ficiles.
De préférence, le décalage temporel équivaut à au moins une trame du signal vidéo et, avantageusement, le signal vidéo a une fréquence comprise environ entre 25 et 60 Hertz.  Preferably, the time offset is equivalent to at least one frame of the video signal and, advantageously, the video signal has a frequency of between about 25 and 60 Hertz.
Une trame suffit pour obtenir l'effet recherché sans que le décalage temporel ne soit perceptible par 1 ' observateur .  A frame is sufficient to obtain the desired effect without the time shift being perceptible by the observer.
Selon un mode de réalisation particulier, l'organe de traitement est relié aux oculaires par un sé- parateur de signal et le module retardateur est monté en¬ tre le séparateur de signal et l'un des oculaires. According to a particular embodiment, the processing unit is connected to the eye by a signal splitter and the timer module is mounted in ¬ be the signal splitter and one of the eyepieces.
Ce mode de réalisation est particulièrement sim¬ ple . This embodiment is particularly sim ¬ ple.
Le dispositif peut également comprendre un organe de traitement numérique. Avantageusement, le dispositif comporte un module de stabilisation et, de préférence, le module de stabili¬ sation est incorporé dans l'organe de traitement. The device may also include a digital processing device. Advantageously, the device comprises a stabilization module and, preferably, the stabili ¬ tion module is incorporated in the treatment member.
Ceci permet de compenser des tremblements de l'observateur qui pourraient entraîner un décalage spa¬ tial et donc un flou perceptible par l'observateur. This compensates tremors of the observer that could cause offset spa ¬ tial and therefore a noticeable blur by the observer.
Selon une caractéristique particulière, le dispo¬ sitif comporte un intensificateur de lumière monté en avant du capteur. According to a particular characteristic, the dispo ¬ operative part comprises a light intensifier mounted in front of the sensor.
D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description qui suit de modes de réalisation particuliers non limita¬ tifs de l'invention. Other features and advantages of the invention will become apparent from reading the following description of non-confined particular embodiments of the invention ¬ tive.
Il sera fait référence à la figure unique annexée représentant schématiquement un dispositif de vision conforme à l'invention.  Reference will be made to the single appended figure schematically showing a vision device according to the invention.
En référence à la figure, le dispositif de vision numérique de l'invention est un dispositif bioculaire comportant un boîtier 1 incorporant un organe de traite- ment numérique 2 relié, d'une part, à un capteur 3 et, d'autre part, à deux éléments de restitution d'images 4.1, 4.2 formant oculaires 5.1, 5.2.  With reference to the figure, the digital vision device of the invention is a biocular device comprising a housing 1 incorporating a digital processing unit 2 connected, on the one hand, to a sensor 3 and, on the other hand, with two image restoration elements 4.1, 4.2 forming eyepieces 5.1, 5.2.
Le capteur 3 est par exemple un capteur CMOS ou CCD. En avant du capteur 3 est disposé un groupe de len- tilles 6 permettant un rapprochement ou une plage de rap¬ prochements prédéterminés. Entre le groupe de lentilles 6 et le capteur 3 peut être monté un intensificateur de lumière non représenté. L' intensificateur peut être un tube IL ou tout autre organe agencé pour amplifier le faisceau lumineux ayant traversé le groupe de lentilles 6 de telle manière que le faisceau lumineux venant frapper le cap¬ teur 3 ait une intensité augmentée par rapport au fais¬ ceau lumineux entrant dans le dispositif. The sensor 3 is for example a CMOS or CCD sensor. In front of the sensor 3 is arranged a group of lenses 6 for approximation or a range of rap ¬ close to predetermined. Between the lens group 6 and the sensor 3 can be mounted a light intensifier not shown. The intensifier may be a IL tube or other member designed to amplify the light beam having passed through the lens group 6 such that the light beam impinging on the cap ¬ tor 3 has an increased intensity compared to doing ¬ light CWater entering the device.
Les éléments de restitution d'images 4.1, 4.2 sont des écrans de type OLED ou LCD en regard desquels sont disposées des lentilles de sortie 7.1, 7.2. La dis¬ tance entre l'écran et la lentille de sortie 7.1, 7.2 est avantageusement réglable pour permettre une adaptation à la vue de l'observateur. The image rendering elements 4.1, 4.2 are OLED or LCD type screens with respect to which output lenses 7.1, 7.2 are arranged. ¬ dis tance between the screen and the exit lens 7.1, 7.2 is advantageously adjustable to allow adaptation to the view of the observer.
L'organe de traitement 2, connu en lui-même, est agencé pour émettre un signal vidéo numérique vers l'élément de restitution d'images 4.1, 4.2 de chaque ocu¬ laire 5.1, 5.2. Le signal vidéo a une fréquence de par exemple 25 Hertz. L'organe de traitement 2 incorpore ici en outre un module de stabilisation. The processor 2, known in itself, is arranged to emit a digital video signal to the image restitution element 4.1, 4.2 of each ocu ¬ 5.1, 5.2. The video signal has a frequency of, for example, 25 Hertz. The processing member 2 further incorporates a stabilization module.
L'organe de traitement 2 est relié aux oculaires The treatment organ 2 is connected to the eyepieces
5.1, 5.2 par un séparateur de signal 8. 5.1, 5.2 by a signal separator 8.
Le dispositif comprend un module retardateur 9 monté entre le séparateur de signal 8 et l'élément de restitution d'images 4.1. Le module retardateur 9 est agencé pour établir un décalage temporel entre les resti¬ tutions d'images réalisées par les deux oculaires 5.1,The device comprises a delay module 9 mounted between the signal separator 8 and the image recovery element 4.1. The delay module 9 is arranged to establish a time shift between the image resti ¬ tions performed by the two eyepieces 5.1,
5.2. Le décalage temporel équivaut à au moins une trame du signal vidéo. Ainsi, l'élément de restitution d'images 4.1 reçoit un signal vidéo en retard d'une trame par rap¬ port au signal vidéo reçu au même instant par l'élément de restitution d'images 4.2. 5.2. The time offset is equivalent to at least one frame of the video signal. Thus, the image restitution element 4.1 receives a video signal delayed by one frame by rap ¬ port to the video signal received at the same time by the image restitution element 4.2.
Bien entendu, l'invention n'est pas limitée aux modes de réalisation décrits mais englobe toute variante entrant dans le champ de l'invention telle que définie par les revendications.  Of course, the invention is not limited to the embodiments described but encompasses any variant within the scope of the invention as defined by the claims.
En particulier, le dispositif peut avoir une structure différente de celle décrite :  In particular, the device may have a structure different from that described:
- le séparateur est facultatif, deux voies peu- vent sortir de l'organe de traitement, the separator is optional, two channels can leave the treatment unit,
- le module retardateur peut être intégré à l'organe de traitement ou à l'élément de resti¬ tution d'image, - the timer module can be integrated to the treatment member or of resti ¬ tution picture element,
- l'organe de traitement est facultatif et le capteur peut être relié directement au sépara- teur 8 et, éventuellement, être agencé pour ef¬ fectuer des traitements des signaux. the treatment unit is optional and the sensor can be connected directly to the separator 8 and, optionally, be arranged to ef ¬ perform signal processing.
- le dispositif peut comprendre ou pas un inten- sificateur de lumière, fonctionner en lumière visible ou infrarouge...  the device may or may not include a light intensifier, operate in visible or infrared light ...
Le dispositif peut être des jumelles ou tout au¬ tre dispositif de vision comportant deux oculaires, par exemple un microscope. The device can be twins or at ¬ be viewing device with two eyepieces, such as a microscope.

Claims

REVENDICATIONS
1. Dispositif de vision numérique bioculaire com¬ portant un capteur numérique (3) relié à deux éléments de restitution d'images (4.1, 4.2) appartenant chacun à un oculaire (5.1, 5.2) pour émettre un signal vidéo numérique vers chaque oculaire, caractérisé en ce que le dispositif comprend un module retardateur (9) pour établir un décalage temporel entre les restitutions d' images réalisées par les deux oculaires. 1. A biocular digital vision device com ¬ carrying a digital sensor (3) connected to two image restoration elements (4.1, 4.2) each belonging to an eyepiece (5.1, 5.2) for transmitting a digital video signal to each eyepiece, characterized in that the device comprises a delay module (9) for establishing a time lag between the image restitutions made by the two eyepieces.
2. Dispositif selon la revendication 1, dans lequel le décalage temporel équivaut à au moins une trame du si¬ gnal vidéo. 2. Device according to claim 1, wherein the time shift is equivalent to at least one frame of the video if ¬ gnal.
3. Dispositif selon la revendication 1, dans lequel le signal vidéo a une fréquence comprise environ entre 25 et 60 Hertz.  3. Device according to claim 1, wherein the video signal has a frequency between about 25 and 60 Hertz.
4. Dispositif selon la revendication 1, comportant un organe de traitement numérique (2) .  4. Device according to claim 1, comprising a digital processing member (2).
5. Dispositif selon la revendication 4, dans lequel l'organe de traitement (2) est relié aux oculaires (5.1, 5. Device according to claim 4, wherein the treatment member (2) is connected to the eyepieces (5.1,
5.2) par un séparateur de signal (8) et le module retarda¬ teur (9) est monté entre le séparateur de signal et l'un des oculaires. 5.2) by a signal splitter (8) and the module delayed ¬ tor (9) is mounted between the signal splitter and one of the eyepieces.
6. Dispositif selon la revendication 1, comportant un module de stabilisation.  6. Device according to claim 1, comprising a stabilization module.
7. Dispositif selon les revendications 4 et 6, dans lequel le module de stabilisation est incorporé dans l'organe de traitement (2) .  7. Device according to claims 4 and 6, wherein the stabilization module is incorporated in the treatment member (2).
8. Dispositif selon la revendication 1, comportant un intensificateur de lumière monté en avant du capteur.  8. Device according to claim 1, comprising a light intensifier mounted in front of the sensor.
EP11728274.9A 2010-07-01 2011-06-29 Low-noise bioccular digital vision device Withdrawn EP2588913A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1055312A FR2962232B1 (en) 2010-07-01 2010-07-01 LOW NOISE BIOCULAR DIGITAL VISION DEVICE
PCT/EP2011/060926 WO2012001056A1 (en) 2010-07-01 2011-06-29 Low-noise bioccular digital vision device

Publications (1)

Publication Number Publication Date
EP2588913A1 true EP2588913A1 (en) 2013-05-08

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Application Number Title Priority Date Filing Date
EP11728274.9A Withdrawn EP2588913A1 (en) 2010-07-01 2011-06-29 Low-noise bioccular digital vision device

Country Status (5)

Country Link
US (1) US20130100262A1 (en)
EP (1) EP2588913A1 (en)
FR (1) FR2962232B1 (en)
IL (1) IL223650A (en)
WO (1) WO2012001056A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9661232B2 (en) * 2010-08-12 2017-05-23 John G. Posa Apparatus and method providing auto zoom in response to relative movement of target subject matter
AT511923B1 (en) * 2011-08-24 2015-06-15 Swarovski Optik Kg FERNOPTICAL DEVICE

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WO1995013564A1 (en) * 1993-11-09 1995-05-18 Eric Martin White Method and apparatus for visualizing two-dimensional motion picture images in three dimensions
US5880777A (en) * 1996-04-15 1999-03-09 Massachusetts Institute Of Technology Low-light-level imaging and image processing
US5777715A (en) * 1997-01-21 1998-07-07 Allen Vision Systems, Inc. Low vision rehabilitation system
US20030103136A1 (en) * 2001-12-05 2003-06-05 Koninklijke Philips Electronics N.V. Method and system for 2D/3D illusion generation
US7795574B2 (en) * 2004-02-23 2010-09-14 Xenonics, Inc. Low-light viewing device for displaying image based on visible and near infrared light
FR2901086B1 (en) * 2006-05-11 2008-08-01 Sagem Defense Securite METHOD AND DEVICE FOR VISION RESTITUTION WITH TWO EYE-FREE OCULARS

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Title
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See also references of WO2012001056A1 *

Also Published As

Publication number Publication date
FR2962232B1 (en) 2012-08-10
US20130100262A1 (en) 2013-04-25
IL223650A (en) 2017-04-30
FR2962232A1 (en) 2012-01-06
WO2012001056A1 (en) 2012-01-05

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