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WO2008100097A1 - Module optique utilisé pour l'observation d'un événement ou d'un objet - Google Patents

Module optique utilisé pour l'observation d'un événement ou d'un objet Download PDF

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Publication number
WO2008100097A1
WO2008100097A1 PCT/KR2008/000882 KR2008000882W WO2008100097A1 WO 2008100097 A1 WO2008100097 A1 WO 2008100097A1 KR 2008000882 W KR2008000882 W KR 2008000882W WO 2008100097 A1 WO2008100097 A1 WO 2008100097A1
Authority
WO
WIPO (PCT)
Prior art keywords
mirror
event
observation
detected
cells
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.)
Ceased
Application number
PCT/KR2008/000882
Other languages
English (en)
Inventor
Il Hung Park
Jae Hyoung Park
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.)
Ewha Womans University
Original Assignee
Ewha Womans University
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 Ewha Womans University filed Critical Ewha Womans University
Publication of WO2008100097A1 publication Critical patent/WO2008100097A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H13/00—Means of attack or defence not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/02—Catoptric systems, e.g. image erecting and reversing system
    • G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
    • G02B23/06—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors having a focussing action, e.g. parabolic mirror
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/12—Scanning systems using multifaceted mirrors
    • G02B26/127—Adaptive control of the scanning light beam, e.g. using the feedback from one or more detectors

Definitions

  • the present invention relates to an optical system. More particularly, this invention relates to an optical module that effectively observes a rapidly moving event or object, which is configured to include: a first mirror having a wide field of view (FOV), for detecting the event or object over a wide area of observation; and a second mirror including a plurality of mirror cells each of whose focal length is greater than that of the first mirror, in which the plurality of mirror cells controlling the wide area of observation detected by the first mirror, correspondingly and respectively, so that one of the mirror cells corresponding to a particular position of the wide area of observation can observe, at a high resolution, the event or object in the wide area of observation detected by the first mirror.
  • FOV wide field of view
  • TLE transient luminous events
  • MEMS micro-electro-mechanical system
  • the MEMS is employed in various systems, such as: an apparatus for inflating a vehicle's air bag to match with a user's weight and with the speed detected by the air bag sensor; a global position system (GPS) sensor that can indicate a continuous track of freight transportation and handling freight processes; a sensor that detects air flow change according to air resistance on the surface of airplane wings and performs interaction; an optical switching apparatus that outputs optical signals at 20 m/ns, a cooling/heating apparatus for operating a sensor; and a sensor installed in a building, for changing the flexibility of matter that reacts to atmospheric pressure.
  • GPS global position system
  • the present invention has been made in view of the above problems, and provides an optical module that can effectively observe a rapidly moving event or object, in which the optical module includes: a first mirror having a wide field of view (FOV), for detecting the event or object over a wide area of observation; and a second mirror including a plurality of mirror cells each of whose focal length is greater than that of the first mirror, in which the plurality of mirror cells control the wide area of observation detected by the first mirror, correspondingly and respectively, so that one of the mirror cells corresponding to a particular position of the wide area of observation can observe, at a high resolution, the event or object in the wide area of observation detected by the first mirror.
  • FOV wide field of view
  • the present invention provides an optical module for observing an event or object including: a first mirror with a wide field of view (FOV), for detecting the event or object over a wide area of observation; a second mirror including a plurality of mirror cells each of whose focal length is greater than that of the first mirror, in which the plurality of mirror cells control the wide area of observation detected by the first mirror, correspondingly and respectively, so that one of the mirror cells corresponding to a particular position of the wide area of observation can observe, at a high resolution, the event or object in the wide area of observation detected by the first mirror; an optical signal detector for detecting an optical signal transmitted from the first mirror or the second mirror; a body including the first mirror, the second mirror, and the optical signal detector therein, and forming apertures which correspond to the first mirror and the second mirror, respectively, the body providing an optical path from the first mirror or the second mirror to the optical signal detector; and a controller for determining whether the detected event or object is a target
  • FOV wide field of view
  • the first mirror includes a digital mirror that is switched off after detecting the event or object.
  • the respective mirror cells of the second mirror comprise a digital mirror that is switched on/off according to a control signal of the controller.
  • the first mirror and the second mirror change the optical path of an image to a certain path.
  • the second mirror can be controlled to provide a certain resolution.
  • the first mirror and the second mirrors are operated through a micro electro mechanical system (MEMS).
  • MEMS micro electro mechanical system
  • the optical module according to the present invention can effectively observe an event or object, which is configured to include: a first mirror having a wide field of view (FOV), for detecting the event or object over a wide area of observation; and a second mirror including a plurality of mirror cells each of whose focal length is greater than that of the first mirror, in which the plurality of mirror cells control the wide area of observation detected by the first mirror, correspondingly and respectively, so that one of the mirror cells corresponding to a particular position of the wide area of observation can observe, at a high resolution, the event or object in the wide area of observation detected by the first mirror.
  • FOV wide field of view
  • Figure 1 is a view illustrating an optical module according to an embodiment of the present invention.
  • Figure 2 are views describing the operation principle of an optical module according to an embodiment of the present invention, in which: Figure 2A is a view describing a process for detecting an event or an object in a wide area of observation, particularly a rapidly moving event or object, for example, transient luminous events (TLE), using a first mirror 110 having a wide field of view; and Figure 2B is a view describing a process for observing, in detail, at a high resolution, a particular position of the event or object detected by the process of Figure 2A, using one of the mirror cells with a relatively long focal length and a high resolving power, included in a second mirror 120, in which the one of the mirrors corresponds to the particular position of an event or object.
  • TLE transient luminous events
  • [37] 198 area observed by a mirror cell of the mirror cells included in a second mirror, which corresponds to a particular position of the entire area of observation
  • FIG. 1 is a view illustrating an optical module 100 according to an embodiment of the present invention.
  • the optical module 100 is configured in such a way that: a first mirror 110 detects an event or object over a wide area, based on its wide FOV; a second mirror 120 includes a plurality of mirror cells each of whose focal length is greater than that of the first mirror, in which the plurality of mirror cells control the wide area of observation detected by the first mirror, correspondingly and respectively, so that one of the mirror cells corresponding to a particular position of the wide area of observation can observe, at a high resolution, the event or object in the wide area of observation detected by the first mirror; an optical signal detector 130 detects optical signals in light transmitted from the first mirror 110 or at least one or more second mirrors 120; and a body 140 includes the first mirror 110, at least one or more second mirrors 120, and the optical signal detector 130 therein.
  • the body 140 forms apertures 142 and 144 which correspond to the first mirror 110 and at least one or more second mirrors 120, respectively.
  • the optical module 100 further includes a data storage unit 150 for storing the detected optical signal, an interface unit 160 for connecting between elements in the optical module 100, a controller 170 for controlling the entire operation of the system, and a power supply 180 for supplying power to the elements in the optical module 100.
  • the first mirror 110 serves to detect an event or object, particularly a rapidly moving event or object (for example, TLE), over a wide area using its wide FOV.
  • the first mirror 110 is located close to the optical signal detector 130 in the body 140.
  • the first mirror 110 has a relatively short focal length and the body 140 has an aperture 142 corresponding to the focal length.
  • the first mirror 110 is preferably implemented by a MEMS micro-mirror array that can be turned on/off in a digital method, allowing the second mirror 120 to observe the event or object detected by the first mirror 110 at a high resolution.
  • the first mirror 110 is aligned so that it can change the optical path of an event image or an object image to a certain path to transmit it to the optical signal detector 130.
  • the second mirror 120 serves to observe in detail the event or the object (for example, TLE) detected by the first mirror 110 using its high resolving power.
  • the second mirror 120 is configured to include a plurality of mirror cells that control the wide area of observation 190 detected by the first mirror 110, correspondingly and respectively.
  • the mirror cells are implemented in a 2 x 2 matrix block as shown in Figure 1.
  • each of the plurality of mirror cells is located relatively far from the optical signal detector 130 in the body 140.
  • each mirror cell has a relatively long focal length.
  • each mirror cell is associated with a corresponding aperture 144.
  • the second mirror is configured in such a way that one of the mirror cells, which corresponds to a particular position 196 of the wide area of observation 190 that the first mirror 110 controls, can observe, at a high resolution, the event or object in the wide area of observation 190 detected by the first mirror 110.
  • the optical module 100 includes a controller 170 and may further include another controlling unit (not shown).
  • the controller 170 determines whether the event or object detected by the first mirror 110 is a target of observation; reads the position of the event or object when concluding that the event or object is a target of observation; controls the first mirror 110 and the second mirror 120 in such a way to provide an optical path to only one of the mirror cells of the second mirror 120, which corresponds to a particular position 196 of the event or object detected by the first mirror 110, and to block optical paths to the remaining mirror cells.
  • the respective mirror cells of the second mirror 120 are implemented by an MEMS micro-mirror array employing a digital method so that they can be turned on/off according to a control signal of the controller.
  • the second mirror 120 is aligned so that it can change the optical path of an event image or an object image to a certain path to transmit it to the optical signal detector 130.
  • the second mirror 120 is implemented by only one mirror, it will be easily appreciated that the second mirror 120 can be configured to include a plurality of mirrors.
  • the connection between an area of observation controlled by the first mirror 110 and an area of observation controlled by the second mirror 120 and each of the plurality of mirror cells of the second mirror 120 is described as follows.
  • the area of observation 192 controlled by the first mirror 110 (referred to as a first observation area 192) is the same as the entire area of observation 190 and the area of observation 194 controlled by the second mirror 120 (referred to as a second observation area 194) is also the same as the entire area of observation 190. That is, the first observation area 192 of the first mirror 110 can be controlled by the second mirror 120.
  • the mirror cells of the second mirror 120 can control the first observation area 192, partially and respectively.
  • one particular mirror cell controls a target of observation 198 that corresponds to a partial area 196 of the entire area of observation 190. That is, the first observation area 192 controlled by the first mirror 110, i.e., the entire area of observation 190, can be controlled by the second mirror 120. In other words, the respective mirror cells of the second mirror 120 can control particular partial areas of the first observation area 192, i.e., the entire area of observation 190.
  • the optical signal detector 130 serves to detect optical signals from the first mirror
  • Such an optical signal detector 130 includes an ultraviolet region detecting unit for detecting an optical signal in the ultra-violet region and a near infra-red region detecting unit for detection an optical signal in the near infrared region.
  • the ultra-violet region detecting unit may be implemented by a multi- anode photomultiplier tube (MAPMT).
  • MAPMT multi- anode photomultiplier tube
  • the ultra-violet detecting unit includes: an ultra-violet region detector 132, configured by an MAPMT, for detecting an optical signal in the ultraviolet region; an analog board 132 and digital board 134 for operating the ultra-violet region detector 132; and a PMT power supply for supplying power to the MAPMT.
  • the near infra-red region detecting unit includes: a near infra-red region detector 137 for detecting an optical signal in the near infra-red region; and a near infra-red region electric device 138 for operating the infra-red region detector 137.
  • a near infra-red region detector 137 for detecting an optical signal in the near infra-red region
  • a near infra-red region electric device 138 for operating the infra-red region detector 137.
  • the optical system is implemented to detect only the ultra-violet region signal and near infra-red region signal
  • the electrical device that corresponds to an electric signal processing unit for the optical signal detector 130 is not limited by the embodiment of Figure 1.
  • the body 140 includes the first mirror 110, the second mirror 120, and the optical signal detector 130 therein.
  • the body 140 provides an optical path from the first mirror 110 or the second mirror 120 to the optical signal detector 130.
  • the body 140 forms the apertures 142 and 144 at the lower portion of the first and second mirrors 110 and 120, respectively.
  • aperture collimators (not shown) may be further installed to the apertures 142 and 144, respectively.
  • the data storage unit 150 stores the detected optical signals and is implemented by a hard disk, etc.
  • the interface unit 160 serves as a connection between the devices in the system and is implemented by a bus interface, etc.
  • the controller 170 refers to a CPU to control the entire operation of the system. Specifically, as described above, the controller 170 is operated in such a way that: a determination is made as to whether the event or object detected by the first mirror 110 is a target of observation, using the electric signal processing units included in the optical signal detector 130; the location of the detected event or object is read when the detected event or object is a target of observation; and the first and second mirrors are controlled based on the read location.
  • a controller may be installed into the optical signal detector.
  • the power supply 180 supplies power to devices in the system.
  • Figure 2 are views describing the operation principle of an optical module according to an embodiment of the present invention, in which: Figure 2A is a view describing a process for detecting an event or object in a wide area of observation, particularly a rapidly moving event or object, for example, transient luminous events (TLE), using a first mirror 110 having a wide FOV; and Figure 2B is a view describing a process for observing, in detail, at a high resolution, a particular position of the event or object detected by the process of Figure 2A, using one of the mirror cells with a relatively long focal length and a high resolution, included in a second mirror 120, in which one of the mirrors corresponds to the particular position of an event or object.
  • TLE transient luminous events
  • the optical module of the present invention initially tries to detect an event or object 250, for example, transient luminous events (TLE), over a wide area of observation, using the first mirror 110 for a wide FOV, which is referred to as an event/object detecting process.
  • an event or object 250 for example, transient luminous events (TLE)
  • TLE transient luminous events
  • the field of view (FOV) 240 of the first mirror 110 is shown in Figure 2A.
  • the event or object 250 detected by the first mirror 110 is transmitted to the optical signal detector 130 to determine whether the detected event or object is a target of observation. When it is determined that the detected event or object 250 is a target of observation, the process proceeds to an event/object observing process as shown in Figure 2B.
  • a particular position of the event or object, detected through the event/object detecting process of Figure 2A is observed in detail by one of the mirror cells of the second mirror cells 120, which corresponds to the particular position of the event or object, as only one of the mirror cells is turned on.
  • the mirror cells have a relatively long focal length and a high resolution.
  • the respective mirror cells of the second mirror 120 are implemented by an MEMS micro-mirror array, operated in a digital method, so that they can be rapidly turned on/off according to a control signal of the controller.
  • the first mirror 110 must be switched off, and the second mirror 120 must be operated in such a way that only the mirror cell, which corresponds to a particular position of the detected event or object 250, is turned on and focused on the detected event or object 250, and the remaining mirror cells are turned off.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

La présente invention concerne un module optique qui permet d'observer efficacement un événement ou un objet, le module optique comprenant: un premier miroir ayant un champ de vision (CDV) servant à détecter l'événement ou l'objet sur une plage d'observation étendue; un deuxième miroir comprenant une pluralité de cellules de miroir dont la distance focale de chacune est supérieure à celle du premier miroir, cette pluralité de cellules de miroir contrôlant la plage étendue d'observation détectée par le premier miroir, de manière correspondante et respective, de sorte qu'une des cellules de miroir correspondant à un endroit particulier de la plage étendue d'observation puisse observer, à haute résolution, l'événement ou l'objet dans la plage étendue d'observation détectée par le premier miroir; un détecteur de signal optique qui détecte un signal optique transmis par le premier miroir ou le deuxième miroir; un corps dans lequel sont inclus le premier miroir, le deuxième miroir et le détecteur de signal optique, ce corps formant des ouvertures qui correspondent respectivement au premier miroir et au deuxième miroir, ledit corps produisant un chemin optique entre le premier miroir ou le deuxième miroir et le détecteur de signal optique; et une unité de commande qui détermine si l'événement ou l'objet détecté est une cible d'observation, qui lit une position de l'événement ou de l'objet détecté suite à la conclusion que l'événement ou l'objet détecté est une cible d'observation et qui commande le premier miroir et le deuxième miroir. L'unité de commande produit un chemin optique vers une seule des cellules de miroir du deuxième miroir, qui correspond à la position particulière de l'événement ou de l'objet détecté par le premier miroir et bloque les chemins optiques vers les cellules de miroir restantes. Le module optique est conçu pour comprendre: un premier miroir ayant un CDV étendu, permettant de détecter l'événement ou l'objet sur une plage d'observation étendue; et un deuxième miroir comportant une pluralité de cellules de miroir dont la distance focale de chacune d'elles est supérieure à celle du premier miroir, ladite pluralité de cellules de miroir commandant la plage d'observation étendue détectée par le premier miroir de manière correspondante et respective, de sorte qu'une des cellules de miroir correspondant à une position particulière de la plage d'observation étendue puisse observer, à haute résolution, l'événement ou l'objet situé dans la plage d'observation étendue détectée par le premier miroir.
PCT/KR2008/000882 2007-02-14 2008-02-14 Module optique utilisé pour l'observation d'un événement ou d'un objet Ceased WO2008100097A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0015149 2007-02-14
KR1020070015149A KR100715236B1 (ko) 2007-02-14 2007-02-14 사건이나 사물을 관찰하기 위한 광학 모듈

Publications (1)

Publication Number Publication Date
WO2008100097A1 true WO2008100097A1 (fr) 2008-08-21

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PCT/KR2008/000882 Ceased WO2008100097A1 (fr) 2007-02-14 2008-02-14 Module optique utilisé pour l'observation d'un événement ou d'un objet

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KR (1) KR100715236B1 (fr)
WO (1) WO2008100097A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3043549A1 (fr) * 2014-12-21 2016-07-13 Elta Systems Ltd. Procédés et systèmes de détection de flash

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100767059B1 (ko) 2007-06-28 2007-10-15 이화여자대학교 산학협력단 고속으로 반사각을 제어할 수 있는 미러를 이용한 광학시스템

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020041803A (ko) * 2000-05-10 2002-06-03 다니구찌 이찌로오, 기타오카 다카시 화상 표시 장치 및 얼라인먼트 조정 방법
KR20040083476A (ko) * 2001-12-19 2004-10-02 액츄앨리티 시스템즈, 인크. 방사선 조절 시스템 및 그 방법
WO2006018835A1 (fr) * 2004-08-16 2006-02-23 Rafael-Armament Development Authority Ltd. Systeme de reconnaissance de bord

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020041803A (ko) * 2000-05-10 2002-06-03 다니구찌 이찌로오, 기타오카 다카시 화상 표시 장치 및 얼라인먼트 조정 방법
KR20040083476A (ko) * 2001-12-19 2004-10-02 액츄앨리티 시스템즈, 인크. 방사선 조절 시스템 및 그 방법
WO2006018835A1 (fr) * 2004-08-16 2006-02-23 Rafael-Armament Development Authority Ltd. Systeme de reconnaissance de bord

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3043549A1 (fr) * 2014-12-21 2016-07-13 Elta Systems Ltd. Procédés et systèmes de détection de flash
US10175101B2 (en) 2014-12-21 2019-01-08 Elta Systems Ltd. Methods and systems for flash detection

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