TW201118413A - Light path switching apparatus and method and image fetching apparatus of such application - Google Patents

Abstract

An optical path switching apparatus includes a first optical switching device, a second optical switching device, a first lens group and a second group. Each of the first optical switching device and the second optical switching device has a switching state including a first state and a second state. The first state maintains a light path for passing. The second state reflects the light path. The first and second lens groups are set relative to locations of the first and second optical switching devices. Further, according to a switching configuration for the first and second optical switching devices, an incident light path travels through the first lens group or the second lens group and emits on an exiting light path.

Description

201118413 ^MV8U〇61TW 32422twf.doc/n VI. Description of the Invention: [Technical Field of the Invention] Helping Fast The present invention relates to a control technique for an optical path that is switched between different optical paths. [Prior Art]

A general video recorder or a surveillance camera is an optically magnified image of a target object. The optical zoom and the lens are composed of two groups: and the relative position between the lens groups is changed according to a specific distance relationship. To achieve the purpose of changing the optical magnification. However, the driving of the lens group requires trees, mechanisms, and precision control such as motors, reducers, cams, and position sensors, so zooming often takes several seconds. Such a camera is often found to be insufficient in performance when applied to the photography of the flying body to the ground. When the camera and the target object are ancient ^, the standard object appears in the face for only a few seconds. To obtain an image for recording or recognition, the camera lens needs to be fast to the telephoto focal length. When multiple targets are simultaneously in the surveillance range, the camera needs to operate back and forth between the wide-angle and telephoto positions, and control the targets and obtain their enlarged close-up images. In this case, the speed of change of the focal length of the brothers is obviously not the same. With the development of the safety watch system in modern times, there has been considerable progress in the development of video surveillance equipment technology and system integration. For example, beans include smart image surveillance systems with identity, location, and activity. However, Ke Yi is lying on the camera. In order to achieve the comprehensive monitoring of no dead angle and three-dimensional, 201118413 P51980061TW 32422twf.doc/n, aerial aerial vehicles (such as aircraft, helicopters, spaceships, etc.) can be used for aerial imagery to obtain more information on airborne surveillance. Despite the many advantages of aerial surveillance, photographic systems based on ground-based surveillance have shown insufficient performance. For example, when the plane flies quickly, the target of the ground is displayed in the surface only for a few seconds (for example, 3 to 5 seconds), and because the distance monitored by the air is very far (at least hundreds of meters). ) 'The target appearing in the face is small. In order to obtain a clear magnified image of the target 'changing the focal length of the photographic lens is an essential function; therefore, in a short period of time, for example, 1 second, the target is found, the target is tracked, the target is magnified, and the feature is recognized. (eg graphics, numbers, etc.). The photographic lens needs to be zoomed at high speed to meet the above requirements. However, the conventional photographic lens must drive more than two sets of lens groups to zoom in accordance with the precise specific trajectory to achieve the effect of zooming by changing the relative distance between the lens groups. Such a lens structure requires more time (about 2 to 3 seconds or more) to change the focal length of the double lens, and the above-mentioned high-speed zoom performance cannot be achieved. Therefore, in order to describe the requirements of air monitoring, it is necessary to create a rapid change of the focal length of the photographic lens. Device. In order to achieve a faster zooming effect, the conventional technology proposes several solutions. One is to insert/remove an extra lens group in the lens group to change the focal length of the lens. However, it is generally easier to remove the lens group, but the lens is required. It is not easy to insert the position quickly, because the optical edge is strict = the alignment tree H method is used to optically design the focal length. The other way is to replace the insertion/removal by means of rotation. The mirror group's 201118413 r^^〇061TW 32422ΐΛνί.ά〇ε/η square=, which rotates the mirror group 90 perpendicular to the optical axis. After that, the original lens is out of the optical axis range, and the light passes through the gap, as if the original The lens is removed. Generally, the position of the mirror is maintained by the yellowing. This method requires a large mirror spacing, and it is difficult to achieve the precise alignment of the optical after the spring positioning. In other words, in the conventional technology, the optical path Although the handover is feasible, the speed and accuracy are still insufficient to be applied to, for example, air monitoring.

The present invention provides an optical path switching technique that can be applied to an optical system for rapid zooming. The present invention provides an optical path switching apparatus including a first optical switching device, a second optical switching device, a first lens group, and a second lens. Both the first optical switching device and the second optical switching device have a switching state including: a first state and a second state, wherein the first state maintains a passing optical path cutout, and the second state reflects the optical path. The first and second lens groups are positioned to match the position of the first-second optical switching device; and are configured to form a plurality of light paths required. X, according to the switching configuration of the second optical switching device of the first disk, the "light path" is passed through the first lens group or the second lens group and then exits in an outgoing light path. The invention also proposes a photographic device comprising an optical path switching wear, receiving 1 image light, and outputting - imaging light; and - an optical sensing element connecting the image light to the image of the astigmatism light. The towel optical path switching device includes a first optical splitting device, a second optical switching device, a first mirror 2 and a second lens group. The first optical switching device and the second optical switching device have a switching state including a first state and a second state, and the 201118413 P51980061TW 32422twf.doc/n first shape maintains a passing optical path, the second state Reflect the light path. The first and second lens groups are respectively disposed to match the positions of the first and second optical switching devices. Moreover, in accordance with a switching configuration of the first and second optical switching devices, an incoming light path is passed through the first lens group or the second lens group and exits in an exit path. The present invention also provides an optical path switching method, including providing a first optical, the changing device 'having a switching state including a first state and a second state. The first state maintains a passing optical path, and the second state will The light path is reflected. X, providing - a second optical switching device that also has a second switching state that also includes the first state and the second state. a shovel group ΐ ΐ 镜片 镜片 镜片 镜片 配合 镜片 镜片 镜片 镜片 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二 第二Exit in a light path. The following is a detailed description of the present invention in order to make the above-mentioned inventories of the present invention more obvious and easy to understand. [Embodiment] The invention provides an optical path method, which can be quickly switched in the optical system, and can be completed and switched in a very short time. Too 昍 昍 丨 ^ From # 丄 丄 * 摄 如 如 如 如 如 镜头 镜头 镜头 镜头 镜头 镜头 镜头 镜头 镜头 镜头 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 空中 空中 空中 空中 空中 空中 空中 空中The following is a description of some embodiments to describe the invention. Moreover, the restrictions are to be properly combined with each other. Μ Μ 201118413 FMy»U〇61TW 32422twf.doc/n The invention exemplifies the optical path in the imaging optical system, and appropriately arranges the mirror, the splitter, etc. 5 = reflection, (10) OFF switching or 稜鏡 splitting mode , fast or hope ^ light road. In this way, the eye-catching light system can quickly change the focal length or zoom in the form of a t-shaped shape that does not change in position. For example, it is a first focal length lens optical path, a second focal length lens optical path, two sets of 0N/0FF silk material ejection elements, and two (10)/qff switching machines.

The structure, the two sets of silk reflecting elements, and the image sensing elements are granulated. Common image sensing components such as CCD or CMOS image sensors. 1-2 are schematic diagrams showing a switching mechanism for two optical paths according to an embodiment of the present invention. Referring to the figure, the optical system 100 having the function of quickly switching the focal length is, for example, in a state of the first focal length lens optical path, which is more, for example, in the state of the wide-angle optical path. The beam 122 enters the optical system 100 from the left, passes through the first set of lenses 1〇4, and directly passes through the first ΟΝ/OFF optical switching device 113. The optical switching device 113 will also be described later as including a rotary driving unit 114 and a sector 112, and in a switching state, includes two states for changing the optical path by passing incident light or reflecting at an angle. In this embodiment, the optical switching device 113 is in an OFF state, allowing the beam to pass directly through to the second set of lenses 106 and the first optically reflective element 124. Reflected by the optical reflective element 124, the direction of change enters the second optical switching device U7, including the rotary drive unit 118 and a segment 116 that functions as the optical switching device 113. At this time, the optical switching device 117 is in an ON state, and the light beam can be reflected to the right to reach the third group lens 126, and the object in the object space is imaged on the image sensing element 120 of 201118413 P51980061TW 32422twf.doc/n. Lens 104, lens 106 and lens 126 cooperate with optical reflective element 124 to form a lens set that is the first focal length lens path of the imaging system. However, the actual design of this lens group is arranged according to the actual needs, in conjunction with the positions of the two optical switching devices 113, 117, and is not limited to a specific mode. Further, the entire optical system 100 can be fixed, for example, in a fixed case 102. This is also a fixed method generally used, but it is not particularly limited. Referring to Fig. 2, the optical switching device 113 is in an ON state and the optical switching device 117 is in an OFF state as compared with the switching configuration of the two optical switching devices IB, in of Fig. 1, which constitutes, for example, a telephoto optical path. In other words, the two optical switching devices 、3, 117 of the present embodiment are, for example, one in an ON state and the other in an OFF state. The beam enters the optical system 100 from the left, passes through the first set of lenses 1 〇 4 and then hits the first optical switching device 113, where it is in an ON state to reflect the light beam down to the optical reflective element 128. This optically reflective element ι 28 reflects the light beam to the right 'passing through the lens group 110 and directly traversing the second optical switching device 117' to the OFF state. After the beam passes through the lens group 126, the object in the object space is imaged on the image sensing element 12A. Lens group 1〇4, lens group 11〇 and lens group 126 cooperate with optical reflective element 128 to form a lens group which is the second focal length lens path of the imaging system. Based on the arrangement of the other modes of the optical switching devices 113 and 117, the optical paths of the two focal length lenses formed by the two lens groups also change. FIG. 3 is a schematic diagram showing a switching mechanism of two optical paths in a photographing apparatus according to another embodiment of the present invention. 201118413 i>My8U061TW 32422twf.doc/n Referring to Figure 3, the operating mechanism still depends on the switching configuration of the optical switching devices 113 and 117. In this embodiment, for example, the two optical switching devices 113, 117 are all in the on state or in the OFF state. Light in Figure 3

In the learning system 200, the two optical switching devices 113, 117 are all in the 〇N state. The optical system 200 is in a state of the first focal length lens optical path, for example, a wide-angle optical path. Light beam 218 enters optical system 200 and encounters the first optical switching device 113. At this time, the optical switching skirt 113 is in the state to reflect the light beam to the right to the lens group 202 having the first focal length, and then to the second optical switching device 1A. At this time, the optical switching device 117 is also in an ON state to reflect the light beam upward and image the object in the object space on the image sensing element 120. Lens set 202 is the first focal length lens combination of the imaging system. In this embodiment, although the lens group 202 does not use a reflective element to constitute the optical path, a reflective element can be provided if desired. The state of the second focal length lens light path of the present embodiment of Fig. 4 is, for example, a telephoto light path. The light beam 220 enters the optical system 200 and passes directly through the optical switching device 113. At this time, the optical switching device 113 is in an OFF state, allowing the light beam to directly reach the optical reflective element 214. The optical reflective element 214 further reflects the light beam to the right, passes through the second focal length lens set 204, and reaches the optical reflective element 216. Optical reflective element 216 reflects the beam upwardly through the second optical switching device 117, at which time optical switching device 117 is in an OFF state. The beam directly images the object in the object space over the image sensing element 120, and the lens group 204 cooperates with the optical reflecting elements 214, 216 to form a second focal length lens combination such as the 201118413 P5198006ITW 32422twf.doc/n system. The above embodiments of Figures 1 to 4 are all changed under the same design concept. In other words, the position of the two optical switching devices 113, 117 can be quickly switched between the two optical paths, and in each case An optical path cooperates with a lens group and can have a predetermined focal length, thus achieving a fast zooming effect. Μ〆 The structure of the optical switching device will be described below. FIG. 5-7 is a schematic structural view of the optical switching device according to an embodiment of the present invention. Referring to Fig. 5, the aforementioned optical switching devices 113, 117 are, for example, optical switching devices 25A, including a rotary driving unit 252 and a leaf 254. The rotary drive unit 252 drives the fan blade 254 to rotate. The fan blade 254 has a reflective surface 256 thereon. If the light beam is incident on the reflecting surface 256 on the segment 254, it is reflected. The blade 254 is, for example, at an angle of 45 degrees with the light path, so that the light path can be deflected by 9 degrees. In this embodiment, the segment 254 is, for example, a reflective fan. The geometry of the fan piece is not limited to the fan blade of _, as long as the reflector having the same function can be used, and the range of the angle of coverage of the fan is generally not limited, as long as it can be switched to two states. Further, based on the consideration of rapid rotational driving or manufacturing, the segment 254 of the present embodiment is exemplified by the geometry of the semi-disc. More step-by-step, = 246 snippets are distributed at 36 degrees, so that the cutting speed is faster and the balance of rotation is reached. The mechanism of 疋 and = cut is achieved by means of rotation, and the switching speed is better than that of the lens group, so there is a problem of lens movement alignment. 201118413 P519^U061TW 32422twf.doc/n See Figure 6 'Optics Switching device 26A is another design variation that also includes a rotary drive unit 268 and a disk 262. The rotary drive unit 268 drives the disk 262 to rotate. In the present embodiment, the disc 262 facilitates the balance of the force of rotation when rotated. To achieve the effect of reflection, the disc 262 may have a penetrating region 264 and a reflective region 266 which is, for example, plated with a reflective layer.

Based on the foregoing similar considerations, the reflective area 266 is not necessarily a semi-circular design as in the embodiment, it can be multiple sectors, evenly distributed over 36 degrees to achieve faster switching. Referring to Figure 7, the optical switching device is another design change including the drive unit 3〇〇 and a reflective sheet 302. At least a portion of the reflection sheet 302 is a reflection surface. The left figure shows the reflective surface of the reflective sheet 302 in the front view, and the right side shows the rear view. The linear drive unit 300 drives the reflection sheet 3〇2 to move back and forth. When the reflecting surface cuts into the optical path, the light beam can be reflected, and when the reflecting surface leaves the light path, the light is allowed to pass through without changing the light path. In order to make the movement of the reflection sheet 3〇2 more stable, for example, the reflection sheet 3〇2 can be fixed by the sliding structure 3〇4, but it is allowed to slide on the slide rail. Thus, the reflection sheet 3〇2 can be moved on the slide rail structure 3〇4. The optical switching device of Figure 7 is not designed in accordance with the mechanical mechanism of rotation. Ten, the switching speed may be different but the mechanism is still similar. Since the optical switching device does not change the optical parameters of the lens group, the present invention does not require much consideration of the positional accuracy of the lens when it is cut into the optical path. The light weight of the driven reflective sheet also contributes to the increase in driving speed. In addition, the design of the two sets of lens sets can be mutually independent or partially related to the conventional optical design, and the optical switching device can also be regarded as a switchable reflective sheet by 201118413 P5I980061TW 32422twf. doc/π. The role is to change the light path. I can increase the phase of the drive - when riding, use the * automatic switch to continue to get two kinds of zoom dynamic movies. In other words, when monitoring, you can simultaneously obtain the telephoto end and the wide-angle end.

The second _2 or that, in terms of practical effect, is the ability to let the optical pure output simultaneously: :,: the second focal length of the different effects of the film. - The average shot - 1 shirt has 30 sides in seconds. If the optical reverse of 0N/OFF is driven, the number of switchings is 60 times per second, that is, every second (10) and if0 is added 'for example, where odd number is 0N and even time is 0FF, then 欠: owed The image can be obtained with 30 focal lengths per second and even images with a second focal length, and vice versa. Therefore, it is possible to simultaneously output the first focal length and the second focal length of the film. The present invention has been disclosed in the above embodiments, but it is not intended to limit the general knowledge of any technical field in the art.

In the spirit and scope of the bamboo shoots, the scope of protection can be changed. The scope of protection of xr Ming is subject to the definition of the patent application scope attached. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1-2 is a schematic diagram showing a switching mechanism of two kinds of optical paths in a photographing apparatus according to an embodiment of the present invention. - Figure 3-4 is a schematic diagram showing the switching mechanism of the optical path in the photographic apparatus according to another embodiment of the present invention. 5-7 are schematic views showing the structure of the optical switching device according to an embodiment of the present invention. 12 201118413 P51980061TW 32422twf.doc/n [Description of main component symbols] 100: Optical system 102: Fixed boxes 104, 106, 110: Lens group 112, 116: Sectors 113, 117: Optical switching devices 114, 118: Rotary drive unit 120: image sensing element • 122: light beam 124: optical reflective element 126: lens 128: optical reflective element 200: optical system 202: lens group 204: lens group 214, 216: optical reflective element 218, 220: beam Φ 250, 260: optical switching device 252, 268: rotary driving unit 254: fan blade 262: disk 264: penetration region 266: reflection region 300: linear driving unit 302: reflection sheet 304: slide rail structure 13

Claims (1)

。 。 。 。 。 。 。 。 a light path, the second state reflects the light path; X a second optical switching device having a second switching state including the state and the second state; a first lens group; and a second lens a group, wherein the first and second lens groups are respectively disposed to match the positions of the first and second light pre-switching devices to form a plurality of internal optical paths required, wherein the first and second optical switches are performed according to the first and second optical pre-switching devices A switching configuration of the device causes an incoming light path to exit through a first lens group or the second lens group in an exit path. The optical path switching device of claim 1, wherein the first optical switching device and the second optical switching device comprise: at least a fan blade, the fan blade has a reflective surface; and a The two rotating driving unit drives the fan to rotate, and when the fan cuts into the optical path, the first state is 5 Hz, and the first state is when the fan leaves the optical path. The optical path switching device of claim 1, wherein the first optical switching device and the second optical switching device comprise: a disk having at least one reflective sector, And the area other than the reflective sector 14 201118413 ^My«U〇61TW 32422twf.doc/n is transparent; and a rotary drive unit that drives the disk to rotate when the reflective sector cuts into the light path The second state is the first state when the reflective sector leaves the optical path. 4. The optical path switching device of claim 1, wherein the first optical switching device and the second optical switching device comprise: a reflective sheet, at least a portion of which is a reflective surface; and a linear driving unit that drives the reflective sheet to move back and forth. When the reflective surface cuts into the optical path, the second state is when the reflective surface leaves the optical path. The time is the first state. 5. The optical path switching farm of claim 4, wherein the first optical switching device and the second optical switching device further comprise a slider to move the holographic reflector on the slider. (4) The optical path switching device of claim 1, wherein the state is maintained different from the second switching state, and the two optical paths 77 are passed through the first lens group and the second lens group. The state or the state of the second state is maintained by the same first state and the second mirror = the optical path switching device according to the first lens of the first lens, wherein the focal length is the same. , the brother-lens group is corresponding to - wide-angle focal length and - telephoto 9', as described in the scope of claim 1, the optical path switching device, 15 201118413 P51980061TW 32422twf.doc / n includes at least one reflective element, with the second and second The wafer sets are arranged to form the internal light paths. 10. A photographic device, comprising: an optical path switching skirt, receiving an image light' and rotating an imaging diaphragm to an optical sensing component, receiving the imaging light to obtain an image of the image light, wherein the optical path is switched The device includes: a first optical switching device, a first switching state including a first state and a second state 'the first state maintains an optical path edge', the second state reflects the light path; a second The optical switching device has a second switching state including the first state and the second state; a first lens group; and a second lens group, wherein the first and second lens groups respectively cooperate with the first lens group And a plurality of internal optical paths # required to form a position of the second optical switching device, wherein a light path is passed through the first lens group according to a switching configuration of the first and second optical switching devices Or the second lens group outputs the image light in an exit path. The photographic device of claim 10, wherein in the optical path switching device, the first optical switching device and the second optical switching device comprise: ^ 16 201118413 my_61TW 32422twfd〇c /n at least one blade having a reflective surface; and a/one rotary drive unit that drives the segment to rotate, the second state when the blade is cut into the light path 'When the blade leaves the light The path is the first state. 12. The photographic device of claim 1, wherein the optical switching device, the first optical switching device and the second optical switching device comprise: a disk having at least one disk Reflecting the sector, and the area outside the reflective sector is transparent; and the red-turn drive unit drives the disk to rotate 'when the reflective sector cuts into the optical path (four) for the second state, when the inverse (four) zone The light path is the first state. 13. The photographing apparatus of claim 1, wherein the optical path switch t, the first optical switching device and the second optical switching device comprise: a reflective sheet, a reflective sheet having at least One part is a reflective surface; and a linear driving single TL drives the reflective sheet to move back and forth. When the reflection is entered, the path i is a pin two state, and the first state is when the reflective surface leaves the optical path. . The photographic apparatus of claim 13, wherein the first optical switching device and the second optical switching device further comprise a slide rail for moving the reflective sheet on the sliding rail. 15. The photographic apparatus of claim 1, wherein the first-cut miscellaneous state and the second switching state are not constituting two lights 17 201118413 P51980061TW 32422twf.doc/n paths respectively pass the a lens group and the second lens group. The photographing apparatus of claim 10, wherein the first switching state and the second switching state are the same as the first switching state or the second state, and the two optical paths respectively pass through The first lens group ^ the second lens group. The photographic device of claim 1, wherein the first lens group and the second lens group correspond to a wide-angle focal length and a distance. The photographic device of claim 1, wherein the first optical switching device and the second optical switching device output two sets of motion images of different zoom degrees according to a fixed one=changing rate. The photographic apparatus of claim 10, further comprising at least one reflective element disposed in cooperation with the first and second lens sets to form the internal light paths. 20. An optical path switching method, comprising: providing a first optical switching device, wherein a first switching state includes a first state and a second state, the first state maintaining a path through the optical path, the second state The light path is reflected; providing a second optical switching device having a second switching state including the first state and the second state; providing a first lens group and a second lens group to cooperate with the first disk Positioning the two optical switching devices to respectively configure the required multiple internal optical paths; and switching a switching configuration of the first and the second optical switching devices to make 201118413 F5iyx0061TW 32422twf-d〇c/n The light path exits the light exit path after passing through the first lens group or the second lens group. The optical path switching method of claim 2, wherein the first optical switching device and the second optical switching device are provided, comprising: providing at least one fan, the fan having a reflecting surface; The fan blade is driven to rotate, and the second state is the first state when the blade is cut into the light path. 22. The optical path switching method of claim 2, wherein the first optical switching device and the second optical switching device are provided, comprising: providing a disk having at least one reflective sector And the area outside the reflective sector is transparent; and driving the disk to rotate, the second state is when the reflective sector cuts into the optical path, and the first is when the reflective sector leaves the optical path -status. 23. The optical path switching method of claim 2, wherein the first optical switching device and the second optical switching device are provided, comprising: ^ providing a reflective sheet, the reflective sheet having at least a portion The reflecting surface and 'driving the reflecting sheet move back and forth, t the reflecting surface is cut when the light path is pinched, and the second state is the first state when the reflecting surface is the light path. The optical path switching method of claim 23, wherein the reflective sheet is moved on the slider by a slide rail. The optical path switching method of claim 20, wherein the first switching state and the second switching state are maintained differently, and the two optical paths are respectively passed through the first a lens group and the second lens group. 26. The optical path switching method of claim 20, wherein the first switching state and the second switching state maintain the same second state or the second state to form two optical paths respectively The first lens group and the second lens group. The optical path switching method of claim 2, wherein the first lens group and the second lens group correspond to a wide-angle focal length and a far focal length. The optical path switching method according to the second aspect of the invention, wherein the first optical switching device and the second optical switching device output two sets of dynamic images of different zoom degrees according to a fixed switching rate. 29. The optical path switching method of claim 2, further comprising providing at least one reflective element to cooperate with the first and second lens sets to form the internal light paths. 20