DE102007019101B4 - Device for detecting an object scene - Google Patents

Abstract

Device (1, 1 ') for detecting an object scene with an imaging optical system (2) comprising entry optics (3), deflection optics (4), and structurally robust branching optics (5), comprising a number of detector units (27, 38, 39) and with at least one emitter unit (28) for emitting electromagnetic radiation, wherein - the entrance optics (3), the deflection optics (4) and the structure-fixed branching optics (5) are arranged one behind the other with respect to a longitudinal axis (6), - the deflection optics (4 ) is rotatably mounted about the longitudinal axis (6) relative to the structure-fixed branching optics (5), - the entry optics (3) is mounted pivotably relative to the deflecting optics (4) about a pitch axis (10) which is substantially orthogonal to the longitudinal axis (6); the entry optics (3) for collecting and aligning an incident electromagnetic radiation on an input beam path (8) and for focused emission of an output beam path (9) l Leaves Fender electromagnetic radiation is formed, - the deflection optics (4) for the optical connection of the entrance optics (3) with the branching optics (5) by guiding the input (8) and the output beam path (9) is formed, - the structurally robust branching optics (5) for the frequency- and / or polarization-dependent decomposition of electromagnetic radiation entering via the input beam path (8) and for the guidance of the emitter unit (28) emitted electromagnetic radiation to the output beam path (9), - for the separation of incident and emitted electromagnetic radiation in the Entry optics (3) an aperture separation (18) is formed, the aperture separation (18) in the entrance optics (3) comprises a Mittenausnehmung (19), - in the region of the Mittenausnehmung (19) a Kollimationsoptik (20) for focusing emitted radiation is formed.

Description

The invention relates to a device for detecting an object scene.

Devices are known which are designed to detect an object scene. Such devices are used in defense and reconnaissance systems and in civil defense systems. Such a device comprises, for example, according to WO 2004/066614 A1 an imaging optical system with an entrance optics, with a deflection optics and with a number of detector units for the detection of electromagnetic radiation or for detecting the object scene. Furthermore, systems are known, for example from the DE 101 17 147 A1 , which are equipped with an additional active target illumination and with a branching optics for the suppression of the reflected radiation. The light coupling for an active target illumination is difficult to integrate in a receiving system. In the DE 101 17 147 A1 this is realized by means of a fiber optic cable, but caused by the disadvantageously depending on the length of the supply line attenuation losses. Additional difficulties arise in systems which are to be formed with different target illumination modes, for example for distance measurement in the infrared range or as a countermeasure in the visible spectral range.

From the DE 101 23 050 A1 For example, a dual-mode seeker is known in which an optical arrangement comprises a dichroic beam splitter cube for frequency-dependent splitting of incident electromagnetic radiation onto two detectors. The beam splitter cube is arranged between a mirror optics and the optics associated with the detectors.

From the US 2005/0179888 A1 It is known that in lidar systems, for example, beam splitters are used, on the one hand to direct the electromagnetic radiation emitted by a transmitter in an object scene and on the other hand to direct the reflected radiation to a receiver.

The DE 42 22 642 A1 shows an image-capturing sensor unit with a passive and an active LADAR sensor. For the two sensors, a common imaging optics is provided. To separate the passive sensor impinging electromagnetic radiation and the returning radiation of the LADAR sensor, a beam splitter is also used there.

The US 4 024 392 A deals with a gimbaled, active optical system, which comprises a laser for illuminating points of an object scene, which is also detectable via the optical system. The radiation emitted by the laser is thereby completely decoupled from the received electromagnetic radiation in a separate transmission path comprising several prisms.

A first object of the invention is to specify a device for detecting an object scene, which can be used in a multimodal manner. A further object of the invention is to specify a seeker head for a guided missile system, which can likewise be used in a multimodal manner.

The first object is achieved by the features of the first claim. Accordingly, a device for detecting an object scene is provided with an imaging optical system, comprising an entry optics, a deflection optics, and a structure-fixed branching optics, with a number of detector units and at least one emitter unit for emitting electromagnetic radiation, wherein the entrance optics, the deflection optics and the structurally fixed branching optics are arranged one behind the other with respect to a longitudinal axis, the deflecting optics being mounted so as to be pivotable about the longitudinal axis relative to the structure-fixed branching optic, the entrance optic being mounted pivotably relative to the deflecting optic about a pitch axis substantially orthogonal to the longitudinal axis, the entrance optics for collecting and aligning one incident electromagnetic radiation is formed on an input beam path and for the focused emission of emanating via an output beam path electromagnetic radiation, wherein the Uml enkoptik for the optical connection of the entrance optics with the branching optics by guiding the input and the output beam path is formed, and wherein the structurally robust branching optics for frequency- and / or polarization-dependent decomposition of incoming via the input beam path electromagnetic radiation and the guidance of the emitter unit emitted electromagnetic radiation the output beam path is formed.

The invention is based on the idea of guiding the input beam path and the output beam path via one and the same imaging optical system. Coupling losses and loss of attenuation by a fiber optic cable, which are constructive to pass by the input beam path can be avoided. Variations of the transmission of an optical fiber by their movement are thereby avoided. Due to the pivotable arrangement, the entry optics can be aligned in any spatial direction of the half-space located in front of the entrance optics. The input beam path can hereby In particular, be used by several passive sensor channels and as a receiving channel for the active sensors.

According to the invention, in the imaging optical system the input beam path and the output beam path are separated from each other by an aperture separation in the input optics, whereby a low crosstalk of an actively emitted radiation on the reception path and thus on the detectors is ensured. A returned portion of the actively emitted radiation can nevertheless be registered via the input beam path by means of the branching optics.

The aperture separation is realized in the region of the entrance optics by a center recess formed there. The light emitted by the emitter unit light is guided via the output beam path in the center recess.

Furthermore, according to the invention, a collimating optics for focusing the emitted radiation is formed in the region of the central recess. This collimating optic is expediently made adjustable, so that the divergence angle of the radiation can be adjusted depending on the application. This is especially important in multimodal applications of the device. Thus, for example, a large divergence angle is favorable for object recognition and determination of the distance of the object, since the space sector actively monitored by radiation becomes correspondingly large. On the other hand, if, for example, light is emitted in a predetermined direction as a countermeasure, close bundling of the beam with a correspondingly small divergence angle is desirable.

In an expedient embodiment of the device, the entry optics is designed as a Cassegrain optic. Such optics include a parabolically curved concave mirror which collects incident radiation and redirects it to a smaller, convexly curved mirror positioned in front of the concave mirror. From this convex mirror, the radiation is then passed through a central recess of the concave mirror via the input beam path for further processing. A Cassegrain optics has the advantage that by the deflection of the radiation with mirrors a high focal length can be achieved with a relatively small total length of the optics. Thus, the Cassegrain optics is particularly suitable for pivotable systems whose pivotal range is spatially limited for structural and / or technical reasons.

In the entrance optics, both the input beam path and the output beam path lead through the central recess of the concave mirror. The central recess of the entrance optics is given in the Cassegrain optics by another, central and circular recess in the convex mirror. Within this last recess, the collimation optics is arranged. Viewed from the outside, the convex mirror forms an annular aperture which defines the aperture separation.

In a particularly preferred embodiment, the entrance optics comprise an arrangement with a number of mirrors and / or prisms. With such, the input beam path and the output beam path can be deflected such that a distortion-free transition of both beam paths between the entrance optics and the deflection optics, which is independent of the pitch movement of the entry optics, is shown.

The deflection optics, which is arranged between the entrance optics and the branching optics and designed for the optical connection of both optics by the input and the output beam path is guided over the deflection optics, preferably also comprises an arrangement with a number of mirrors and / or prisms. The deflection optics serve to transmit the radiation signals from the entry axis, which can be pivoted about the pitch axis and rotate together with the deflection optics about the longitudinal or roll axis, onto the structure-fixed branching optics so that the signals are not distorted or disturbed by the pivoting movements.

Since the deflecting optics is mounted rotatably relative to the structure-fixed branching optics about the longitudinal or roll axis, the input beam path and the output beam path between the deflecting optics and the branch optics are advantageously guided coaxially to the longitudinal axis, since a radiation signal is not influenced by a relative rotation. The optical axis of the imaging optical system is thus coaxial with the longitudinal axis. Further, since the entrance optics is pivotally mounted relative to the deflection optics about the pitch axis, the entrance optics advantageously comprises a deflection mirror or a deflection prism, which deflects the input beam path and the output beam path by substantially 90 ° and leads coaxially to the pitch axis on a portion. In this section, the transition of the beam paths takes place on the deflection optics, since a radiation signal remains unaffected by this optical guidance in a relative pivoting movement. With a suitable arrangement of mirrors and / or prisms, the beam paths between the transition points to the entrance optics and the branching optics are guided in the deflection optics.

In a development of the device, the deflection optics comprises an arrangement of lenses for producing an intermediate image. Such a lens arrangement allows a convergence correction of the beam paths and thus a relative tolerance in the length design of the deflection optics.

The branch optics serve to separate the passive from active receive channels. The separation can take place by means of a suitable beam splitter or the like. The structure-fixed branching optical system expediently comprises a prism or a prism arrangement which comprises at least one partially mirrored inner surface for polarization- and / or frequency-dependent decomposition of the input beam path into at least two separate beam paths. In this case, the or each teilverspiegelte inner surface function as a polarizing filter and reflector, for example, such that circularly polarized light is split so that the light component is transmitted with a polarization direction and the complementary light component is reflected with a transverse polarization direction. Accordingly, the or each surface may be formed as a selective filter, for example as a narrow band filter which transmits only light in a narrow frequency band and reflects the remainder back, or vice versa as a narrow band reflector. In the case of several partially mirrored inner surfaces, for example in a beam splitter cube, a multiple splitting of the light into different polarization and frequency components can take place, for example infrared and / or ultraviolet light and / or linearly polarized visible light and / or the like can be split into separate beam paths and a separate beam path Further processing can be supplied. Separate processing of the radiation components is desirable and necessary, in particular with regard to different application modes of the device. In this case, at least a separate beam path and a detector unit for infrared light is expediently set up, since infrared light is present everywhere as heat radiation and is therefore particularly suitable for reconnaissance purposes by means of a passive sensor system.

In a further preferred embodiment of the device, the emitter unit is designed to emit laser light. Monochromatic laser light is characterized by a large coherence length, it is therefore particularly suitable for information transmission, for example for the real-time measurement of the distance of a moving object.

By a suitable teilverspiegelte inner surface or by a filter, it is possible for certain light frequencies to prevent crosstalk of the light from the output beam path to the input beam path. Since, for example, the light emitted for countermeasures is not intended for detection for detection purposes and has a high intensity, crosstalk to the or each detector unit is prevented by a spectral suppression of this light on a partially reflecting surface or on a filter formed therefor. In particular, this protects an infrared detector from scattered radiation. Alternatively, it can be done by temporal multiplexing especially for dazzling lasers.

Preferably, an evaluation unit is provided, which is designed to identify an incident radiation signal above a critical signal-to-noise ratio according to temporal and spatial frequency and intensity distribution. By means of such an evaluation unit, objects can be identified with regard to their geometric properties and their movement behavior. For example, in the field of visible light, the identification of the temporal and spatial frequency and intensity distribution of incident radiation is nothing else than the process of seeing per se. In analogous manner, the evaluation unit is designed, for example, to see the heat radiation registered by the infrared detector unit which emits an object and to identify the object and its movement by means of the individual signature of the radiation.

Furthermore, the evaluation unit is preferably designed to identify portions of a light signal radiated back from the emitter unit via a detector unit for distance determination of an object. Since a determination of the distance of an object by the radiation emitted by the object is only possible to a limited extent, the emitter unit transmits a radiation signal with a special signature, for example with a specific intensity or frequency modulation. The portions of the signal reflected back from the object, the optical echo, are then registered in the or each detector unit. By a correlation of the emitted and the detected signal in the evaluation unit, the time shift between the two signals, which represents the total transit time of the radiation signal, can be determined. From the running time, the distance of the reflecting object can be determined.

In a suitable embodiment of the device, a motor drive unit is provided, which is designed to pivot the entry optics and the deflection optics about the pitch axis or about the roll axis. This is advantageous for capturing an object scene and tracking identified objects.

In an expedient development of the device, the evaluation unit is designed by comparing an identified signal with stored data for object and target verification. While primary object recognition is accomplished by analysis of the radiation distribution emitted by the object, secondary object recognition which recognizes the object per se as a particular object is possible only by associating the characteristic radiation distribution with other known radiation data. Such an adjustment can be used in particular for the purpose of target verification and for reducing a false alarm rate caused by error detection.

Advantageously, a control unit is provided, which is designed to control the motor drive unit as a function of the time-dependent incident direction of an identified signal, the emitter unit and for adjusting the collimating optics. Such a control unit is in particular connected to the evaluation unit and sends control pulses as a function of the signals identified in the evaluation unit. A moving object identified by the evaluation unit can thus be tracked and monitored over a relatively long period of time by corresponding activation of the drive unit, as would be possible with a static entrance optics. Tracking is particularly important when the device itself is installed in a moving system and targets static or non-static objects.

The second object is achieved in that a seeker is specified, comprising a device of the aforementioned type. Furthermore, a guided missile is specified with such a seeker.

In the following, an embodiment of the device will be explained with reference to a drawing. In each case show in a schematic representation

1 the construction of a device with an imaging optical system for detecting an object scene,

2 a further device with an imaging optical system for detecting an object scene in a structural housing of a seeker head, and

3 schematically a guided missile in longitudinal section with a seeker and a device according to 1 ,

In the figures, corresponding parts are provided with the same reference numerals.

1 shows the structure of a device 1 with an imaging optical system 2 for capturing an object scene. The imaging optical system 2 includes an entrance optics 3 , a deflection optics 4 , and a structurally robust branching optics 5 serially one behind the other with respect to a longitudinal axis 6 are arranged, wherein the longitudinal axis 6 at the same time the main optical axis 7 of the imaging optical system 2 represents.

The deflection optics 4 whose boundary is represented by the dotted line is opposite to the structure-fixed branching optics 5 around the longitudinal axis 6 rotatably mounted. Both the input beam path 8th as well as the output beam path 9 remain by a rotation of the deflection optics 4 unaffected, since both beam paths between the deflection optics 4 and the structurally robust branching optics 5 coaxial to the longitudinal axis 6 lie. Furthermore, the entrance optics 3 opposite the deflection optics 4 one to the longitudinal axis 6 orthogonally arranged pitch axis 10 mounted pivotable about 180 °, so that the output beam path 9 the entire hemisphere in front of the entrance optics 11 can paint over. Both the input beam path 8th as well as the output beam path 9 remain by a rotation of the entrance optics 3 relative to the deflection optics 4 unaffected, since both ray paths 8th . 9 between the entrance optics 3 and the deflection optics 4 coaxial to the pitch axis 10 lie. For deflecting the input beam path 8th and the output beam path 9 are several each at 45 ° to the longitudinal axis 6 tilted fully reflective surfaces 12 . 13 intended.

The entrance optics 3 includes a Cassegrain look 14 with a parabolic concave mirror 15 and a convex secondary mirror 16 , The parabolic concave mirror 15 has a central recess 17 on, through which the beam paths 8th . 9 to lead. One in the entrance optics 3 incident radiation is along the input beam path 8th first at the concave mirror 15 reflected and to the secondary mirror 16 directed and from there to the central recess 17 reflected back.

The entrance optics 3 has an aperture separation 18 on, through which the output beam path 9 from the input beam path 8th is separated. The aperture separation 18 is by an annular configuration of the catching mirror 16 given in the middle recess 19 an adjustable collimation optics 20 for focusing one along the output beam path 9 is arranged propagating radiation.

The central recess 17 of the concave mirror is through a prism 21 completed, which end to the vollverspiegelte surface 12 followed. On the fully mirrored surface 12 is the incident radiation along the Input beam path 8th reflected by 90 °, allowing the radiation on a section parallel to the pitch axis 10 propagated. Here is the transition to the deflection optics 4 instead of.

The function of the deflection optics 4 essentially consists of the beam paths 8th . 9 from the transition point to the entrance optics 3 again coaxial to the longitudinal axis 6 at the point of transition to structurally robust branching optics 5 respectively. These are three at 45 ° to the longitudinal axis 6 tilted fully reflective surfaces 13 arranged, to each of which three corresponding prisms 22 connect with a suitable refractive index. For design reasons, the focal length of the entrance optics for generating an intermediate image in front of the lens 23 set the intermediate image to the detector 27 maps.

At the transition point to the deflection optics 4 includes the structurally robust branching optics 5 a compact and optically dense beam splitter cube 24 in which on the cube diagonal a teilverspiegelte inner surface 25 is admitted. Behind the beam splitter cube 24 is a focusing optics 26 and an infrared detector 27 arranged. The partially mirrored inner surface 25 Reflective for wavelengths smaller than that through the detector 27 to be detected, so that only the desired infrared components of a via the input beam path 8th into the imaging optical system 2 incident radiation in the beam splitter cube 24 be transmitted and further along the beam path 8th behind the partially mirrored inner surface 25 the infrared detector 27 be forwarded. Higher-frequency light than infrared light, such as that of a laser emitter unit 28 emitted radiation, which along the output beam path 9 propagated, is at the partially mirrored inner surface 25 reflected. Another partially mirrored surface 29 reflects this from the laser emitter unit 28 emitted light, however, is transmissive to further light components which along the axis portion 30 propagate and from a detector or emitter unit 31 be detected or emitted.

The laser emitter unit 28 For example, it can be used for measuring distances and thus in particular for verifying objects based on their movement patterns. The corresponding module can be manufactured as a unit and, if necessary, only needs to be flanged to the device. By way of example, the reception detector can be a sensitive individual detector which is integrated in the image plane of the transmission channel. In scenarios in which no distance information is required for verification, the corresponding channel can be replaced, for example, by an additional imaging passive detector (eg in the near infrared). Alternatively, a glare laser can be coupled into the optical beam path and aligned with the target object. This provides a modular architecture depending on the application scenario.

2 shows another device 1' with an imaging optical system 2 for detecting an object scene in a structural housing 32 a seeker's head 33 , Visible is the branching optics bounded by a dashed line 5 and the block enclosed by a dotted line 34 , which the entrance optics 3 and the deflection optics 4 includes. The ones in the block 34 contained components of the device 1' are relative to the structural housing 32 over the deflection optics 4 at the campsites 35 completely rotatable, ie rotatable by 360 °, about the longitudinal axis 6 stored. Furthermore, the entrance optics 3 at the campsites 36 rotatably mounted, so that the entrance optics 3 around the deflection optics 4 can be swiveled through 180 °. The combination of both rotational degrees of freedom makes the entrance optics 3 opposite the structure housing 32 in any spatial direction of the half-space 11 in front of the pitch axis 10 aligned. The half-space 11 is limited by that structure-solid plane which is orthogonal to the longitudinal axis 6 lies and in the always the pitch axis 10 lies. The structural housing 32 is in the area of the half-space through a dome 37 made of glass or of a transparent plastic.

Still visible is the Cassegrain optics 14 the entrance optics 3 receiving an incident radiation along the input beam path 8th over the concave mirror 15 and the catch mirror 16 in the central recess 17 of the concave mirror 15 and on the prism 21 passes. On the fully mirrored surface 12 the radiation is transferred to the deflection optics 4 steered, and in the deflection optics 4 over several prisms 22 and fully mirrored surfaces 13 on the beam splitter cube 24 in the structure-fixed branching optics 5 , From the beam splitter cube 24 run three different frequency channels of the reception beam path 8th about focusing optics 26 each to the infrared detector 27 as well as to the detectors 38 and 39 , Over a fully mirrored surface 40 becomes the reception beam path 8th to the detector 39 guided, which is arranged for reasons of space such. For example, to form a verifier at the location of the detector 39 a laser emitter and a laser detector for emitting and detecting laser radiation are used.

The emitted laser light is thereby over the beam splitter cube 24 in the deflection optics 4 coupled and via the entrance optics 3 through the middle recess 19 the capture mirror 16 decoupled.

If, in the same way, a glare laser is coupled into the optical beam path, then the transmission optics must be designed for both wavelengths, namely that of the distance laser and that of the glare laser. If this is not possible, then the beam splitter cube 24 be used for additional coupling of the aperture laser.

The illustrated devices 1 and 1' The advantages are a compact integration of both an active and a passive multi-sensor system. The active and passive sensors are available via a collinear structure with a common optical window or dome. The aperture separation of the input beam path and the transmit beam path achieves an increased overall efficiency. A modular use of various transceiver units, z. B. for distance measurement, target lighting, to a track sensor with distance measurement or glare is possible.

In 3 is a guided missile 41 in longitudinal section with a seeker head 33 and with a device 1 to 1 shown. The guided missile 41 includes an evaluation unit 42 for identification of the device 1 detected radiation signals, a motor drive unit 43 for driving mechanical components of the device 1 , as well as a control unit 44 which the motor drive unit 43 according to specifications corresponding to those in the evaluation unit 42 obtained data drives.

LIST OF REFERENCE NUMBERS

1

contraption

1'

another device

2

imaging optical system

3

admission optics

4

deflecting

5

structurally robust branching optics

6

longitudinal axis

7

main optical axis

8th

Input beam path

9

Output beam path

10

pitch axis

11

half space

12

fully mirrored surface

13

another fully mirrored surface

14

Cassegrain optics

15

concave mirror

16

Fangspiegel

17

central recess in the concave mirror

18

Aperturtrennung

19

central recess

20

collimating optics

21

prism

22

another prism

23

inter-image lens

24

Beam splitter cube

25

partially mirrored inner surface

26

focusing optics

27

infrared detector

28

Laser emitter unit

29

partially mirrored surface

30

intercept

31

Detector or emitter unit

32

structure housing

33

seeker

34

block

35

depository

36

depository

37

cathedral

38

detector

39

detector

40

fully mirrored surface

41

Missile

42

evaluation

43

motor drive unit

44

control unit

Claims (16)

Contraption ( 1 . 1' ) for detecting an object scene with an imaging optical system ( 2 ) comprising an entry optics ( 3 ), a deflection optics ( 4 ), and a structurally robust branching optics ( 5 ), with a number of detector units ( 27 . 38 . 39 ) and with at least one emitter unit ( 28 ) for the emission of electromagnetic radiation, wherein - the entrance optics ( 3 ), the deflection optics ( 4 ) and the structurally robust branching optics ( 5 ) with respect to a longitudinal axis ( 6 ) are arranged one behind the other, - the deflection optics ( 4 ) relative to the structure-fixed branching optics ( 5 ) about the longitudinal axis ( 6 ) is rotatably mounted, - the entrance optics ( 3 ) relative to the deflection optics ( 4 ) about one to the longitudinal axis ( 6 ) substantially orthogonally arranged pitch axis ( 10 ) is pivotally mounted, - the entrance optics ( 3 ) for collecting and directing an incident electromagnetic radiation onto an input beam path ( 8th ) and for focused emission of via an output beam path ( 9 ) electromagnetic radiation is formed, - the deflection optics ( 4 ) for the optical connection of the entrance optics ( 3 ) with the branching optics ( 5 ) by guiding the entrance ( 8th ) and the output beam path ( 9 ), - the structurally robust branching optics ( 5 ) for the frequency- and / or polarization-dependent decomposition of the input beam path ( 8th ) incoming electromagnetic radiation and for guidance of the emitter unit ( 28 ) emitted electromagnetic radiation on the output beam path ( 9 ), - for the separation of incident and emitted electromagnetic radiation in the entrance optics ( 3 ) an aperture separation ( 18 ), the aperture separation ( 18 ) in the entrance optics ( 3 ) a central recess ( 19 ), - in the region of the central recess ( 19 ) a collimation optics ( 20 ) is designed for focusing emitted radiation. Contraption ( 1 . 1' ) according to claim 1, wherein the collimation optics ( 20 ) is adjustable to adjust the divergence angle emitted radiation. Contraption ( 1 . 1' ) according to claim 1 or 2, wherein the entrance optics ( 3 ) as a Cassegrain optic ( 14 ) is trained. Contraption ( 1 . 1' ) according to one of claims 1 to 3, wherein the entrance optics ( 3 ) an arrangement with a number of mirrors ( 12 ) and / or prisms ( 21 ). Contraption ( 1 . 1' ) according to one of claims 1 to 4, wherein the deflection optics ( 4 ) an arrangement with a number of mirrors ( 13 ) and / or prisms ( 22 ). Contraption ( 1 . 1' ) according to claim 5, wherein the deflection optics ( 4 ) an arrangement of lenses ( 23 ) for generating an intermediate image. Contraption ( 1 . 1' ) according to claim 6, wherein the structure-fixed branching optics ( 5 ) a prism ( 24 ), which prism ( 24 ) at least one partially mirrored inner surface ( 25 ) for the polarization and / or frequency-dependent decomposition of the input beam path ( 8th ) in at least two separate beam paths. Contraption ( 1 . 1' ) according to claim 7, wherein at least one separate beam path and a detector unit ( 27 ) is set up for infrared light. Contraption ( 1 . 1' ) according to one of claims 1 to 8, wherein the emitter unit ( 28 ) is designed for the emission of laser light. Contraption ( 1 . 1' ) according to one of claims 1 to 9, wherein an evaluation unit ( 42 ) is provided, which is designed to identify an incident radiation signal above a critical signal-to-noise ratio according to temporal and spatial frequency and intensity distribution. Contraption ( 1 . 1' ) according to claim 10, wherein the evaluation unit ( 42 ) is designed to reflect back-reflected portions of one of the emitter unit ( 28 ) radiated light signal via a detector unit ( 27 . 38 . 39 ) to determine the distance of an object. Contraption ( 1 . 1' ) according to claim 10 or 11, wherein a motor drive unit ( 43 ) is provided, which for pivoting the entrance optics ( 3 ) and the deflection optics ( 4 ) about the pitch axis ( 10 ) or about the longitudinal axis ( 6 ) is trained. Contraption ( 1 . 1' ) according to one of claims 10 to 12, wherein the evaluation unit ( 42 ) is formed by comparing an identified signal with stored data for object and target verification. Contraption ( 1 . 1' ) according to claim 12 or 13, wherein a control unit ( 44 ) is provided, which for controlling the motor drive unit ( 43 ) depending on the time-dependent direction of arrival of an identified signal, the emitter unit ( 28 ) and for adjusting the collimation optics ( 20 ) is trained. Seeker head ( 33 ) with a device ( 1 . 1' ) according to one of claims 1 to 14. Guided missile ( 41 ) with a seeker head ( 33 ) according to claim 15.

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