JP5201957B2 - Imaging device - Google Patents

Description

The present invention relates to an imaging apparatus that is applied to a case of realizing an imaging optical system suitable for a digital camera, a video camera or the like for monitoring.

  2. Description of the Related Art Conventionally, for example, in a photographing apparatus such as a digital camera or a video camera for monitoring, in order to search for a target object (photographing target) and obtain a detailed image thereof, first, a wide area using a super wide angle lens or a fisheye lens is used. Shoot the world. A method of obtaining a detailed image after discriminating a target subject from among them is generally used.

As a method for acquiring the subject image as described above, the following method can be considered.
(1) Method for obtaining an enlarged image of a target subject by electronic zoom (2) Method for obtaining an image of a target subject by configuring the optical system as a zoom lens and changing the magnification of the optical system (zoom lens) on the telephoto side (3 ) A method of switching a captured image of a target subject using a plurality of photographing systems and one of which is a wide-angle photographing system and the other is a telephoto photographing system. Further, a subject guided to an image sensor by driving a reflecting member disposed in an optical system. Methods for switching light have been proposed (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3). In addition, a method has been proposed in which the entire circumference of a subject is observed using a reflection image at the periphery of a convex reflecting member, and another subject image is observed with another optical system with the central portion as a transmission structure. (For example, see Patent Document 4).
JP-A-9-297350 JP 2003-9104 A JP 2006-81089 A JP 2006-139234 A

  However, the above-described conventional image acquisition method has the following problems.

  In the above method (1), in order to obtain a magnified image of the target subject by extracting a part of the image, it is necessary to use an image sensor having high pixels in order to obtain a high-definition image. Performance requirements become stricter. As a result, the cost increases.

  In the method (2), when the target subject is a moving object and the photographer views the subject during zooming, it is necessary to perform zooming again in the wide-angle direction. Therefore, quick subject observation cannot be performed. In addition, it is difficult to realize an optical system that covers a wide angle and a telephoto range.

  In the method (3), since a plurality of photographing systems are used, a plurality of camera units must be used. This increases the size of the apparatus used for photographing and increases the cost. Further, in the method (3), in order to obtain a characteristic as if images were taken with a plurality of imaging optical systems by switching a part of the imaging optical system using one image sensor, A mechanism for inserting / withdrawing a part of the photographing optical system is generally used. Conventionally, a mechanism for replacing a part of the photographing optical system is often used in a two-focal type silver salt compact camera. However, there is a problem that a mechanism for replacing a part of the photographing optical system has a large structure.

  In addition, the techniques described in Patent Documents 1 to 3 have a configuration in which it is difficult to obtain a large change in the shooting angle of view, and the direction of the target subject to be shot changes greatly. Therefore, it becomes difficult to detect the target subject and acquire detailed information in a short time.

  In addition, the technique described in Patent Document 4 has a problem that it is difficult and costly to manufacture a large reflective member with good surface accuracy. Furthermore, since the numerical data of the optical configuration to be implemented is not presented in Patent Document 4, the specific feasibility is unclear.

The present invention is the light of the conventional problems, and an object thereof is to provide a following imaging device. That is, to be able to shoot a plurality of subject images captured simultaneously, the optical system as to encompass telephoto from wide-angle to achieve a small size and low cost, that can be performed quickly subject observation even when the moving object photography shooting An imaging device is provided.

In order to achieve the above object, an imaging apparatus according to the present invention is an imaging apparatus having an optical device and imaging means for photoelectrically converting a subject image formed by the optical device into an electrical signal, A first optical system for capturing a first subject image having negative refractive power and an optical system common to at least a part of the first optical system, and capturing a second subject image A second optical system for transmitting the light, a semi-transmissive or partially reflective reflecting member provided in the common optical system, and a first part that shields a part of the first optical system including a central portion of the subject image. The second optical system includes a positive lens and a negative lens, has a longer focal point than the first optical system, and the second optical system includes the imaging unit. through the reflecting member in a region corresponding to the light shielding region of the first optical system in With imaging the second object image, "L" and the pixel pitch of the imaging means, the NA value of an optical system towards the NA value is large among the first of the second optical system and the optical system When “N” and the allowable difference width is “ΔIP”, the following conditional expression ΔIP ≧ 10 · L / 2 · N
It is characterized by satisfying.

  According to the present invention, it is possible to simultaneously photograph subject images respectively taken from the first optical system and the second optical system. This makes it possible to realize an optical system that covers a wide angle and a telephoto at a small size and at a low cost, and allows a quick subject observation even during moving body shooting.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
In the first embodiment, an optical device having a configuration in which a refractive optical system is used as an objective optical system for obtaining a wide angle of view will be described.

  FIG. 1 is a cross-sectional view showing a schematic configuration of an optical device according to a first embodiment of the present invention.

  As shown in FIG. 1, this optical apparatus has an image sensor IP that photoelectrically converts a subject image into an electric signal, and is shared in the optical axis direction via a filter group 10 such as an infrared absorption filter or a low-pass filter. An optical system 11 and a common reflecting member 12 are arranged. Furthermore, a first objective optical system 15 configured with a refractive optical system for obtaining a wide angle of view and a second objective optical system 13 for obtaining a narrow angle of view are disposed via the common reflecting member 12. Has been.

  Specifically, the common reflecting member 12 is provided on the imaging surface side of the first objective optical system 15 and the second objective optical system 13 (the imaging surface side of the subject image) from each of the objective optical systems 15 and 13. The incident light beams are arranged at a reflection angle such that the incident light beams are incident on the common optical system 11 together. The common reflecting member 12 has a function of reflecting one of the incident lights from the two objective optical systems 15 and 13, deflecting the optical path, and transmitting the other incident light. That is, the common reflection member 12 has semi-transmission or partial reflection characteristics.

  On the imaging surface side of the common reflecting member 12, a common optical system 11 having an effect of imaging a plurality of incident light beams from the two objective optical systems 15 and 13 is disposed. The image pickup device IP is arranged in

  Further, the image size of the image formed through the second objective optical system 13 is larger than the size of the image formed through the first objective optical system 15 (imaging region: image size). The entrance aperture is regulated so as to regulate the object angle of view to the second objective optical system 13 so as to be small.

However, in this state, the subject image passing through the second objective optical system 13 (second subject) and the subject image passing through the first objective optical system 15 (first subject) overlap each other. As a result, it is difficult to capture the formed image clearly.

Therefore, the light shielding member 16 (first light shielding means) is disposed in the first objective optical system 15 so as to shield the central portion of the optical axis, and the first objective optical system 15 blocks the light. Give part. And thus capable of reducing the fog of forming image by the be performed to image the object scene body image taken in from the second objective optical system 13 to the light shielding portion. With such a configuration, it becomes easy to individually observe and observe a plurality of subject images captured from the objective optical systems 15 and 13.

  At this time, in order to perform clearer image separation, a light shielding member 14 (second light shielding means) having an opening shape that restricts the image size is disposed on the light incident side of the second objective optical system 13. To do. Then, the size and shape of the light shielding member 16 are determined so that the prescribed image size region is shielded from light.

  FIG. 2 is a conceptual diagram showing a configuration of a partial reflection mirror that can be used as the common reflection member 12 described above.

  Incident light from the first and second objective optical systems 15 and 13 is reflected, shielded, and transmitted according to the transmission region A1 and the reflection region A2 of the partial reflection mirror, respectively. If the partial reflection mirror having such a configuration is used as the common reflection member 12, the light reduction effect that occurs when the semi-transmission mirror is used does not occur, and good optical characteristics can be obtained even for a dark subject. it can.

  FIG. 3 is an image view showing a schematic shape of a formed image formed on, for example, a rectangular image pickup device IP in the optical device described above.

  In FIG. 3, in the effective imaging range B0, the second portion having a narrow angle of view photographing action in the central portion of the image range B1 picked up by the first objective optical system 15 having a wide angle of view photographing function. The image range B2 captured by the objective optical system 13 is formed. As described above, the second objective optical system 13 has an optical configuration in which the image size of the formed image approximates the light shielding region with respect to the portion where the formed image is shielded by using the light shielding member 16 described above. Yes.

  As a result, the interference between the formed images corresponding to the image captured by the first objective optical system 15 and the image captured by the second objective optical system 13 is reduced, and a plurality of captured subject images are photographed simultaneously. It becomes possible.

  FIG. 4 is an optical path diagram illustrating a first concrete example of the optical device illustrated in FIG. 1.

  In this optical apparatus, a strong negative refraction action is given to the first objective optical system 15-1 to cause a large negative image surface distortion action. On the other hand, the second objective optical system 13-1 corrects distortion by arranging a combination of a positive lens group and a negative lens group so that the focal length is longer than that of the first objective optical system 15-1. It is configured. Both the first objective optical system 15-1 and the second objective optical system 13-1 are set so as to pass through the common optical system 11-1 and form images at substantially the same position on the optical axis.

  In such a configuration, when the same subject is photographed with a plurality of objective optical systems, the difference in the best imaging position on the optical axis in each objective optical system is determined. If so, the following relationship should be satisfied.

ΔIP ≧ 10 · L / 2 · N
L: Pixel pitch of the image sensor N: NA value of the optical system having a larger NA value ΔIP: Allowable difference width This condition is a condition for clearly capturing a plurality of formed images simultaneously in the image sensor IP. If it is out of the range, the focus adjustment operation must be performed every time each formed image is captured. Therefore, in order to capture a plurality of formed images sharply, it is necessary to divide each formed image area at a time when the image is in focus, and as a result, it takes a processing time for image acquisition. It becomes.

  In addition, when each objective optical system independently photographs subjects with different object distances, a focus lens group that moves in the optical axis direction is arranged in the common optical system 11-1. Then, it is preferable to drive the focus lens group so that the target formed image is the best in each objective optical system. Further, in order to simultaneously optimize the formed image of each objective optical system, a focus lens group may be arranged in each objective optical system.

  In order to automatically perform the focus adjustment, it is preferable to adopt an autofocus method using a contrast evaluation of a formed image formed on the image sensor IP. An active external autofocus mechanism that matches the imaging axis of each objective optical system may be used independently for each optical system.

  FIG. 5 is an optical path diagram showing a second concrete example of the optical device shown in FIG.

  In this optical apparatus, assuming that it is not necessary to observe the entire 360 ° direction, the light shielding member 16 in the wide-angle first objective optical system 15-1 is shielded from half of the formed image. , 180 ° direction is observed.

  Accordingly, the second objective optical system 13-2 on the telephoto side also forms an image on the above-described light-shielding portion, and the arrangement of the light-shielding member so as to reduce the covering with the formed image of the first objective optical system 15-1. Good to do.

  In the optical apparatus shown in FIG. 5, the optical axis of the second objective optical system 13-2 on the telephoto side is deflected to an angle at which a part of the subject image of the first objective optical system 15-1 of the wide-angle optical system can be observed. Thus, the common reflection member 12-1 is set at an arrangement angle different from that in FIG. An optical member in which a part of the lens shape of the second objective optical system 13-2 is partially deleted is disposed for the purpose of preventing the interference of the objective optical system and sharing the above-described light shielding effect.

  FIG. 6 is a configuration diagram of the wide-angle optical system according to the first concrete example to which the numerical value shown in numerical example 1 described later is applied, and FIG. 7 is applied the numerical value shown in numerical example 2 described later. FIG. 2 is a configuration diagram of a telephoto optical system according to the first concrete example.

  6 and 7, the common reflecting member 12-1 is not illustrated, but is disposed in the air interval on the light incident side of the common optical system 11-1. In FIG. 6, the first objective optical system 15-1 is composed of two negative lenses having a strong concave surface facing the image plane, thereby giving strong negative distortion and an angle of view of 90 ° or more. The fisheye optical action is obtained.

  On the other hand, the second objective optical system 13-1 in FIG. 7 includes a positive lens and a negative lens from the light incident side, corrects distortion aberration, and has a weak negative refractive power as a whole. Optical characteristics that are telephoto with respect to the optical system are obtained.

  FIG. 8 is an image view showing a schematic shape of a formed image obtained by the optical apparatus of FIG. As described above, the use of the optical configuration as shown in FIG. 5 has an advantage that the upper and lower halves of the screen can be evaluated and observed, and the process of separating a plurality of formed images becomes easy.

  FIGS. 9A, 9B, and 9C are optical path diagrams showing a third concrete example of the optical apparatus shown in FIG. 1, and have a five-group configuration in the variable power optical system when the zoom lens is configured. It is an example using. FIG. 4A shows a wide angle state, FIG. 4B shows an intermediate time, and FIG. 4C shows a telephoto state. FIG. 10 is a configuration diagram of the wide-angle optical system in FIG. 9 to which the numerical value shown in Numerical Example 6 described later is applied, and FIG. 11 is the telephoto optical system in FIG. 9 to which the numerical value shown in Numerical Example 7 is applied. FIG.

  The optical apparatus of this example uses a five-group configuration (B1 to B5 in FIG. 10) for the variable magnification optical system when the zoom lens is configured. The wide-angle first objective optical system 15B-1 uses a fish-eye optical system to which the numerical values shown in Numerical Example 6 are applied, and the telephoto-side second objective optical system 13-2 includes Numerical Example 7. The numerical values shown apply. In addition, a thin mirror 12-1 is used for the common reflecting member 12.

  The wide-angle first objective optical system 15B-1 is designed to be used at the wide-angle end of the zoom optical system. When zooming is performed on the telephoto side, the first objective optical system 15B-1 is disposed on the first objective optical system 15B-1. The formed image is gradually shielded by the light shielding member 16.

[Second Embodiment]
In the second embodiment, the first objective optical system may be a reflecting member having a convex shape on the imaging surface side, that is, in the traveling direction of incident light (or a conical reflecting member having a vertex facing the imaging surface side). An optical device that obtains a wide angle of view by forming a reflection image thereof will be described.

  FIG. 12 is a cross-sectional view showing a schematic configuration of an optical device according to the second embodiment of the present invention. Elements common to those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 12, this optical apparatus has the configuration from the image pickup element IP to the second objective optical system 13 and the light shielding member 14 via the common optical system 11 and the common reflection member 12, as shown in FIG. This is the same as the first embodiment. That is, the difference from FIG. 1 is that as the first objective optical system 15A, an omnidirectional reflecting member 15A-1, a light shielding member 16, and a lens group 15A-2 having a convex shape are arranged in order from the light incident side. A wide angle of view is obtained by forming the reflected image.

  Here, the light shielding member 16 is for shielding the reflected light from around the vertex of the convex surface of the reflecting member 15A-1, and for providing a corresponding light shielding region for the image formed in the center region of the screen.

  The optical device of the present embodiment configured as described above has the same operation as the optical device of FIG.

  FIG. 13 is an optical path diagram showing a first concrete example of the optical device shown in FIG. FIG. 14 is a configuration diagram of a wide-angle optical system according to a first concrete example to which numerical values shown in numerical example 3 described later are applied.

  The telephoto optical system (optical system including the second objective optical system 13-1) arranged in this example is the same as the telephoto optical system in FIG. 7 to which the numerical values shown in Numerical Example 2 are applied.

  As shown in FIGS. 13 and 14, in the first objective optical system 15A of this example, a hyperboloid-shaped reflecting member 15A-1a having a convex surface facing the imaging surface side is disposed closest to the light incident side. In this configuration, the negative lens group 15A-2a is disposed on the image plane side. The negative lens group 15A-2a has a configuration in which a negative lens group 15A-2a for correcting the reflected image and guiding it to the common optical system 11-1 is disposed.

  By adopting such a reflection optical system configuration, when a subject around 360 ° with respect to the optical axis is set as an image range in the horizontal direction, the subject image in the vertical direction can capture a subject image extending across the angular direction orthogonal to the optical axis. . Therefore, it becomes easy to photograph the subject field area that is difficult to design in the fish-eye optical system.

  FIG. 15 is an optical path diagram showing a second concrete example of the optical device shown in FIG.

  In this example, the first objective optical system 15A is a reflection optical system using the reflection member 15A-1a as described above, and the common optical system 11 has a variable magnification configuration (11-2). Thus, the telephoto optical system (the optical system including the second objective optical system 13-2) is a zoom telephoto system that further zooms to the telephoto side, so that further detailed images can be formed. .

  A beam split prism 12-2 is used as the common reflecting member 12, and this prism is arranged so as to guide light from two directions in one direction. For this purpose, the prism used is, for example, a vapor-deposited surface with a semi-transmission characteristic on the bonding surface, and the polarization characteristic is used to selectively reflect and transmit S and P waves. It is preferable to use a surface having polarization mirror characteristics.

  FIG. 16 is a configuration diagram of the wide-angle optical system according to the second concrete example to which the numerical value shown in numerical example 4 described later is applied, and FIG. 17 shows the numerical value shown in numerical example 5 described later. It is a block diagram of the telephoto optical system which concerns on the said 2nd concrete example.

  In the zoom telephoto system, the first lens unit B1, the negative second lens unit B2, the positive third lens unit B3, the positive fourth lens unit B4, and the negative fifth lens having positive refractive power from the light incident side. It consists of group B5. When zooming from wide angle to telephoto, the second lens group B2 is moved toward the image plane, and the optical axis is moved so that the fourth lens group B4 corrects the image plane position. Yes.

  Further, it is preferable that the focusing is performed by moving the fourth lens unit B4 along the optical axis. Further, when the image stabilization function is required, the image plane displacement is corrected so as to correct the image blur by moving the entire third lens unit B3 or a part of the third lens unit B3 in the direction perpendicular to the optical axis. Good to give.

  Here, the wide-angle optical system (an optical system including the first objective optical system 15A) is designed to be used at the wide-angle end of the zoom telephoto system, and when zooming is performed on the telephoto side, the first objective optical system 15A The formed image is gradually shielded from light by the arranged light shielding member 16.

  Also in the second embodiment, as in the first embodiment, a plurality of captured subject images can be taken simultaneously. Therefore, for example, when recognizing a subject at an arbitrary position and capturing its detailed image or tracking a moving object quickly and accurately, it is possible to shoot with one camera without using a plurality of cameras. As a result, a compact and low-cost optical device can be realized.

[Third Embodiment]
In the third embodiment, an optical apparatus in which an optical system that combines a second objective optical system and a common optical system has the function of a secondary imaging optical system will be described.

  FIG. 18 is a sectional view showing a schematic configuration of an optical apparatus according to the third embodiment of the present invention.

  The telephoto optical system according to the present embodiment has a second objective optical system 13A having a positive refractive action as a whole on the light incident side, and a first refractive power having a positive refractive power disposed in the vicinity of the primary imaging position R1. 2 objective optical system 13B. The common reflecting member 12 is arranged at a position through which the subject lights of the first objective optical system 15 and the second objective optical systems 13A and 13B are passed. The common reflecting member 12 has an action of reflecting subject light from the first objective optical system 15 for obtaining a wide angle of view and transmitting subject light from the second objective optical systems 13A and 13B.

  That is, in the present embodiment, the optical system that combines the second objective optical systems 13A and 13B and the common optical system 11 has the function of a secondary imaging optical system. At this time, by arranging a light shielding member 16 that shields off-axis rays near the primary imaging position R1 of the secondary imaging optical system, it is easy to clarify the boundary area of the formed image. .

  FIG. 19 is an optical path diagram showing a first concrete example of the optical device shown in FIG. FIG. 20 is a configuration diagram of the telephoto optical system according to the first concrete example.

  In this example, as shown in FIG. 19, the fish-eye optical system shown in Numerical Example 1 is used for the first objective optical system 15-1 of the wide-angle optical system. The wide-angle optical system (an optical system including the first objective optical system 15-1) uses the reflection characteristics of the common reflecting member 12-1. The telephoto optical system (the optical system including the second objective optical systems 13A-1 and 13B-1) guides each subject light to the common optical system 12-1 using the transmission characteristics of the common reflecting member 12-1. It is something that shines.

  In this optical apparatus, a secondary imaging type optical system to which the numerical value shown in Numerical Example 8 is applied is arranged in the telephoto optical system. Incidentally, the first objective optical system 15-1 of the wide-angle optical system may use the reflecting member 15A-1 as shown in the second embodiment described above.

  In the configuration of FIG. 19, the reflecting member 17A (second reflection) is provided between the primary imaging optical system (second objective optical system) 13A-1 in the secondary imaging optical system and the field lens group 13B-1. Member) to deflect the subject light of the second objective optical system 13A-1 on the telephoto side. The reflecting member 17A and the second objective optical system 13A-1 are movable.

  In order to reduce the size of the optical device, in the first concrete example, the thick positive lens 11-3a arranged on the image plane side of the common reflecting member 12-1 is deflected by 90 °. By adopting a prism shape, the optical system is folded.

  Further, when the reflecting member 17A and the second objective optical system 13A-1 (primary imaging optical system) are rotationally driven (tilt driving) and the entire optical device is rotationally driven (pan driving), various operations are performed. A subject in any direction can be captured with a telephoto optical system.

  At this time, in the tilt drive described above, the point of intersection of the reflecting member 17A and the optical axis is set as the rotation center (17A-1 in FIG. 19), and the photographing axis of the second objective optical system 13A-1 is directed to the target subject direction. Rotation drive is performed so that The displacement of the imaging position associated therewith is corrected by rotating the reflecting member 17A with reference to the rotation center position equivalent to the rotation center 17A-1.

In this case, the driving angle of each of the reflecting member 17A and the second objective optical system 13A-1 is 2 with respect to the displacement of the driving angle of the reflecting member 17A when the reflecting surface of the reflecting member 17A is a plane. It becomes a double relationship. From this, when the rotation angle of the second objective optical system 13A-1 is A and the rotation angle of the reflecting member 17A is B,
A = 2 ・ B
It is desirable to satisfy this relationship, and by satisfying this relationship, it is possible to prevent the displacement of the image formation position and the change in image formation performance due to the position change of the second objective optical system.

  The rotational drive relationship between the reflecting member 17A and the second objective optical system 13A-1 (primary imaging optical system) is the same in the common reflecting member 12-1 and the objective optical system in which incident light is deflected thereby. The same effect can be obtained.

  FIG. 21 is an optical path diagram showing a second concrete example of the optical device shown in FIG.

  This optical device uses the same optical member as the optical device of FIG. 19, and instead of eliminating the above-described reflecting member 17A and eliminating the tilt drive, a part of the shooting field of the wide-angle optical system is telephoto optical. The arrangement angle of the common reflecting member 12 is deflected so that it can be observed with the system. Along with this, the second objective optical systems 13A-1 and 13B-1 on the telephoto side and the common optical system 11-3 are given an inclination relative to the first objective optical system 15-1 on the wide angle side. is there.

  Also in the third embodiment, as in the first embodiment, it is possible to simultaneously capture a plurality of captured subject images. Therefore, for example, when recognizing a subject at an arbitrary position and capturing its detailed image or tracking a moving object quickly and accurately, it is possible to shoot with one camera without using a plurality of cameras. As a result, a compact and low-cost optical device can be realized.

[Fourth Embodiment]
In the fourth embodiment, as in the third embodiment described above, the optical system in which the second objective optical system and the common optical system are combined has the function of a secondary imaging optical system. It is an example.

  FIG. 22 is a cross-sectional view showing a schematic configuration of an optical device according to the fourth embodiment of the present invention.

  This optical device has the same function as that of the third embodiment described above, and an omnidirectional reflecting member 15A-1 having a convex shape on the image forming surface side is arranged in the first objective optical system 15A. In other words, a wide angle of view is obtained by forming the reflected image.

  A light shielding member 16 is disposed between the reflecting member 15A-1 and the lens 15A-2 in the first objective optical system 15A. Here, the light shielding member 16 shields the reflected light from around the apex of the convex surface of the reflecting member 1, and provides a light shielding region for the image originally formed in the central region of the screen.

  FIG. 23 is an optical path diagram showing a concrete example of the optical device shown in FIG.

  The telephoto optical system (the optical system including the second objective optical systems 13A-1 and 13B-1) uses the same optical elements as in FIG. 21 described above, and the first objective optical system 15A has a convex surface on the light incident side. Using a hyperboloidal reflecting member 15A-1a facing the image plane side.

  Also in the fourth embodiment, as in the first embodiment, it is possible to simultaneously capture a plurality of captured subject images. Therefore, for example, when recognizing a subject at an arbitrary position and capturing its detailed image or tracking a moving object quickly and accurately, it is possible to shoot with one camera without using a plurality of cameras. As a result, a compact and low-cost optical device can be realized.

[Modification of optical device]
The optical apparatus of the present invention is not limited to the illustrated embodiment, and various modifications are possible. For example, there are the following modifications.
(1) The pan driving of the optical apparatus shown in FIGS. 19, 21, and 23 is preferably performed by rotating the entire apparatus around the optical axis of the wide-angle objective optical system. The system may be fixed and other optical devices may be rotated.
(2) The configuration of the optical device in each of the embodiments described above is not limited to the above-described example, and for example, the first objective optical system and the second objective optical system so that the relationship between reflection and transmission described above is reversed. The arrangement may be configured as follows.
(3) The image forming medium is not limited to the image pickup device. If necessary, a silver salt film or a focusing plate is arranged to observe the projected image, or the formed image is an aerial image and the image is used as a field scope. You may make it observe.

[Fifth Embodiment]
Next, application examples of the optical device according to the present embodiment will be described with reference to FIGS.

  FIG. 24 is a conceptual diagram illustrating an installation example of an imaging device equipped with the optical device according to the present embodiment.

  In FIG. 24, an imaging device 41 equipped with the above-described optical device 40 is installed on the ceiling surface 42 so that the imaging element IP in the imaging device faces downward, thereby observing a subject (person) 43 in a diagonally downward direction. It is configured to be able to.

  24 indicates an image captured by the first objective optical system 15, and reference numeral 45 indicates a combined optical in which the first objective optical system 15 and the second objective optical system 13 are combined. This is an image captured by the system. Reference numerals W1 and W2 denote field angle ranges, which will be described later with reference to FIG. Ω shown schematically represents the subject direction angle and will be described later with reference to FIGS.

  FIG. 25 is a cross-sectional view showing a schematic configuration of the mechanism of the imaging apparatus in FIG.

  In FIG. 25, the imaging device 41 includes an optical device 40 and an imaging device inside the housing, and is disposed on the light incident side of the pan driving mechanism 41 a, the tilt driving mechanism 41 b, the protective dome 41 c, and the first objective optical system 15. The light shielding member 16 is provided. The pan driving mechanism 41a is driven in the arrow Ya direction (panning direction) in the drawing, and the tilt driving mechanism 41b is driven in the arrow Yb direction (tilting direction) in the drawing.

  The range indicated by reference sign W1 is a field angle range by a composite optical system in which the first objective optical system 15 of the optical device 40 and the common optical system 11 are combined, and the range indicated by reference sign W2 is the second objective optical of the optical device. This is an angle of view range by a composite optical system in which the system 13 and the common optical system are combined.

  In the imaging device 41, the reflection member (not shown) in the second objective optical system 13 in the optical device 40 or the common reflection member 12 through which the first objective optical system 15 and the second objective optical system 13 are interposed is rotationally driven. Then, these reflecting members are set to an arbitrary deflection angle. That is, tilt drive is performed. Thereby, the photographing axis is adjusted by the second objective optical system 13 in accordance with the distance of the subject. Further, the optical axis is rotated and driven so as to include at least the optical system arranged on the light incident side in the second objective optical system 13. That is, panning drive is performed. Thereby, the photographing direction of the second objective optical system 13 is changed in accordance with the direction of the subject.

  In the example of FIG. 25, the entire optical system including the image pickup element IP is configured to be rotatable around the optical axis, but is not limited thereto. What is necessary is just to rotationally drive B1 group containing the reflection member in the 2nd objective optical system 13 centering | focusing on the optical axis after deflection.

  In FIG. 24, in order to capture the upper body image of the walking subject (person) 43 with the imaging device 41, the subject direction is first identified from the image captured by the first objective optical system 15, and the second direction is obtained by panning drive. The imaging axis in the horizontal direction of the objective optical system 13 is aligned. Thereafter, the upper body of the subject 43 is photographed by tilt driving in accordance with the distance of the subject 43. By repeating this operation, it is possible to accurately track the moving object (the walking subject 43).

  Here, an example of a method for performing direction detection and correction movement of the subject 43 will be described.

  First, position detection in the tilt direction and pan direction of the imaging axis of the optical system currently set in the optical device is performed. Next, the panning rotation angle at which the target object captured by the first objective optical system 15 and discriminated by a shape recognition unit (not shown) or the like performs correction movement in the concentric direction in the image circle (image range) is set. calculate. At the same time, the tilt correction driving amount is calculated from the distance from the center of the image circle to the target subject in the radial direction. Then, the pan driving mechanism and the tilt driving mechanism are driven according to the calculation result.

  FIG. 26 is a conceptual diagram showing an initial image state at the time of subject recognition by an imaging device equipped with the optical device according to the present embodiment.

  In FIG. 26, the control unit (see FIG. 27) of the optical device recognizes (detects) the target object 61, and the pan direction and the tilt direction necessary for capturing the detailed image of the target object 61 with the second objective optical system 13. Is calculated. The electrical configuration including the control unit of the imaging apparatus equipped with the optical device according to the present embodiment will be described later with reference to FIG.

Now, it is assumed that the pan (horizontal) direction of the second objective optical system 13 in the optical apparatus is directed to the illustrated (P) direction. First, on the basis of the (P) direction, the angle θ of the target subject 61 in the concentric direction is determined based on the image of the outer peripheral side area of the image circle imaged by the first objective optical system 15 therefrom. Next, the relationship between the angle ω of the light beam incident on the first objective optical system 15 and the image height Y at which the light beam forms an image on the imaging surface of the image sensor IP, for example,
ω = AY + BY2 + CY3 + ...
However, A, B, C,... Incorporate a polynomial expression such as a coefficient that is specific to the optical system used in the drive algorithm.

  Next, the distance (screen image height) Y from the center of the image circle (center of the screen) to the center of the target subject is calculated, and the subject direction angle ω is calculated from the distance Y using the above-described polynomial expression.

  Thereby, the necessary tilt driving angle of the tilt movement group (optical configuration on the subject side including the reflecting member) in the second objective optical system 13 can be obtained.

  At this time, it is not always necessary to perform both of the panning and tilt driving described above. For example, in the case of monitoring a person who moves only in the depth of the hallway or in the front direction, only the tilt driving may be performed. Further, in photographing a person or the like who moves around the optical apparatus without changing much distance, the second objective optical system 13 for capturing a detailed image is fixed at a necessary tilt angle and only panning driving is performed. It will be good.

  This completes the description of target object discrimination and high-speed detailed image capture by tracking of a moving object or high-field observation in an application example of the optical device according to the present embodiment. Note that by setting the tilt angle of the second objective optical system 13 to be outside the range of the angle of view of the first objective optical system 15, it is possible to simultaneously observe subjects in different directions.

  Next, an electrical configuration example and a control example of an imaging apparatus equipped with the optical device according to the present embodiment will be described with reference to FIGS. 27 and 28. FIG.

  FIG. 27 is a block diagram illustrating an example of an electrical configuration of an imaging apparatus equipped with the optical device according to the present embodiment.

  In FIG. 27, the imaging device has the optical device 101 according to the present embodiment shown in FIG. Further, the imaging device IP, the signal processing unit 103, the storage unit 104, the operation unit 105, the control unit 106, the storage unit 107, the display unit 108, the pan driving mechanism 109, and the tilt driving mechanism 110 are provided.

  The image sensor IP photoelectrically converts the subject image formed by the optical device 101 into an electric signal. The signal processing unit 103 performs signal processing on the electrical signal output from the image sensor IP and stores the signal in the storage unit 104 as image data. The storage unit 104 includes a work area and a temporary data storage area for the control unit 106 in addition to the image data storage area. The operation unit 105 is used for inputting various instructions to the optical device 101.

  The control unit 106 controls the entire imaging apparatus including the optical device 101 and controls the driving of the pan driving mechanism 109 and the tilt driving mechanism 110. The pan driving mechanism 109 performs a panning operation based on the control of the control unit 106. The tilt drive mechanism 110 performs a tilt operation based on the control of the control unit 106. Further, the control unit 106 executes the process shown in the flowchart of FIG. 28 based on the control program stored in the storage unit 107. The display unit 108 displays a captured image, and can be installed at a location away from the installation location of the imaging device body (a monitoring center or the like when the imaging device is used as a monitoring camera).

  FIG. 28 is a flowchart showing the flow of the moving object tracking operation after subject recognition by the imaging apparatus equipped with the optical device 101 according to the present embodiment.

  In FIG. 28, the control unit 106 of the imaging apparatus has a pan angle (an angle driven in the pan direction) and a tilt angle (in the tilt direction) set in the second objective optical system 13 of the optical device 101 via the operation unit 105. The driving angle is detected and stored in the storage unit 104 (step S1).

  Next, the control unit 106 recognizes the target subject from the image range (B1 in FIG. 3) obtained by the first objective optical system 15 of the optical device 101 (step S2), and from the image range in the concentric direction of the target subject. The angle θ (FIG. 26) is determined (step S3).

  Next, the control unit 106 detects the length Y (FIG. 26) in the radial direction from the image center of the target subject from the image range (step S4), and the subject direction angle ω (see FIG. 26) based on the length Y. 24) is calculated (step S5). That is, the relative position of the target subject with respect to the optical device 101 is detected.

  Next, the control unit 106 calculates a required drive angle from the currently set pan angle and tilt angle, the angle θ of the target subject in the concentric direction, and the subject direction angle ω (step S6), and the required drive angle. Is determined to be equal to or greater than a preset specified value (step S7). Here, the necessary drive angle is a drive angle in the pan direction and the tilt direction necessary for tracking the target subject (moving body).

  If the calculated required drive angle is less than the preset specified value, the process returns to step S2. On the other hand, when the calculated required drive angle is equal to or greater than a predetermined value set in advance, the control unit 106 performs driving in the pan direction by the pan driving mechanism 109 and driving in the tilt direction by the tilt driving mechanism 110 (step S8). . Thereafter, the control unit 106 stores the pan angle associated with the driving in the pan direction and the tilt angle associated with the driving in the tilt direction in the storage unit 104 (step S9), and returns to step S2.

  In the above-described operation step, it is not necessary to perform both of the two-direction discrimination and driving in the pan direction and the tilt direction, and driving in only one direction may be performed as necessary.

  Conventionally, for example, in order to recognize a subject at an arbitrary position and capture a detailed image thereof or to perform tracking and shooting of a moving object quickly and accurately, a plurality of imaging devices are generally used. With respect to this point, in the imaging apparatus according to the present embodiment, the above-described imaging can be performed with a single imaging apparatus, and as a result, a compact and low-cost optical apparatus can be realized.

[Numerical example]
Next, aberration diagrams of the optical device according to Numerical Examples 1 to 8 are shown in FIGS.

  FIG. 29 is a diagram illustrating longitudinal aberrations of the fish-eye optical system in the numerical value example 1. FIG.

  FIG. 30 is a diagram illustrating longitudinal aberrations of the telephoto optical system according to Numerical Example 2.

  FIG. 31 is a diagram showing transverse aberration of the wide-angle reflective optical system in Numerical Example 3.

  FIG. 32 is a diagram showing transverse aberration at the wide-angle end of the wide-angle reflective optical system in Numerical Example 4.

  FIG. 33 is a diagram illustrating longitudinal aberrations at the wide-angle end of the telephoto variable magnification optical system according to Numerical Example 5.

  FIG. 34 is a diagram illustrating longitudinal aberrations in the middle of the telephoto variable magnification optical system according to Numerical Example 5.

  FIG. 35 is a diagram showing longitudinal aberrations at the telephoto end of the telephoto variable magnification optical system in the numerical value example 5.

  FIG. 36 is a diagram illustrating longitudinal aberrations at the wide-angle end of the fish-eye optical system according to Numerical Example 6.

  FIG. 37 is a diagram showing longitudinal aberrations at the wide-angle end of the telephoto variable magnification optical system in the numerical value example 7.

  FIG. 38 is a diagram illustrating longitudinal aberrations in the middle of the telephoto variable magnification optical system according to Numerical Example 7.

  FIG. 39 is a diagram showing longitudinal aberrations at the telephoto end of the telephoto variable magnification optical system in the numerical value example 7.

  FIG. 40 is a diagram showing longitudinal aberrations of the telephoto secondary imaging optical system in the numerical value example 8. FIG.

  29 to 40, ΔS indicates a sagittal image plane, and ΔM indicates a meridional image plane.

  Next, specific numerical values in Numerical Examples 1 to 8 are shown below.

In each numerical example, Ri is the i-th lens thickness and air spacing in order from the light incident side, and Ni and νi are the refractive index and Abbe number of the glass of the i-th lens in order from the light incident side.
The aspheric coefficients K, A, B, C, D, and E are given by the equation (1) shown in FIG.
Where X is the amount of displacement from the lens apex in the optical axis direction, H is the distance from the optical axis, and R is the radius of curvature.

<Numerical Example 1>
f = 1.08 Fno = 1.48 NA = 0.34 2ω = 168.3 °
R 1 = 18.885 D 1 = 1.20 N 1 = 1.83481 ν 1 = 42.7
R 2 = 6.573 D 2 = 3.63
R 3 = 466.090 D 3 = 1.80 N 2 = 1.88300 ν 2 = 40.8
R 4 = 4.664 D 4 = 12.85
R 5 = 64.434 D 5 = 8.09 N 3 = 1.84666 ν 3 = 23.9
R 6 = -15.593 D 6 = 4.55
R 7 = 27.039 D 7 = 1.80 N 4 = 1.77250 ν 4 = 49.6
R 8 = -78.220 D 8 = 1.00
R 9 = Aperture D 9 = 1.50
R10 = −6.568 D10 = 2.20 N 5 = 1.84666 ν 5 = 23.9
R11 = 6.366 D11 = 2.00 N6 = 1.77250 ν6 = 49.6
R12 = -14.479 D12 = 0.10
R13 = 12.093 D13 = 1.82 N 7 = 1.60311 ν 7 = 60.6
R14 = -12.636 D14 = 0.10
R15 = 7.498 D15 = 1.50 N 8 = 1.83481 ν 8 = 42.7
R16 = 21.068 D16 = 1.50
R17 = ∞ D17 = 4.00 N 9 = 1.51633 ν 9 = 64.1
<Numerical Example 2>
f = 2.51 Fno = 1.50 NA = 0.33 2ω = 35.4 °
R 1 = 59.690 D 1 = 1.70 N 1 = 1.77250 ν 1 = 49.6
R 2 = -35.198 D 2 = 0.15
* R 3 = -114.351 D 3 = 1.00 N 2 = 1.80610 ν 2 = 40.9
* R 4 = 4.627 D 4 = 10.00
R 5 = 64.434 D 5 = 8.09 N 3 = 1.84666 ν 3 = 23.9
R 6 = -15.593 D 6 = 4.46
R 7 = 27.039 D 7 = 1.80 N 4 = 1.77250 ν 4 = 49.6
R 8 = -78.220 D 8 = 1.00
R 9 = Aperture D 9 = 1.50
R10 = −6.568 D10 = 2.20 N 5 = 1.84666 ν 5 = 23.9
R11 = 6.366 D11 = 2.00 N6 = 1.77250 ν6 = 49.6
R12 = -14.479 D12 = 0.10
R13 = 12.093 D13 = 1.82 N 7 = 1.60311 ν 7 = 60.6
R14 = -12.636 D14 = 0.10
R15 = 7.498 D15 = 1.50 N 8 = 1.83481 ν 8 = 42.7
R16 = 21.068 D16 = 1.50
R17 = ∞ D17 = 4.00 N 9 = 1.51633 ν 9 = 64.1
R18 = ∞
・ Aspheric surface coefficient 3rd surface: K = -3.05503e + 002 A = 0.000000 + 000 B = -4.12397e-004
C = 1.97036e-005 D = -1.79480e-007 E = 0.00000e + 000
4th surface K = 1.10373e-001 A = 0.00000e + 000 B = -7.40181e-004
C = -5.07705e-005 D = 3.38928e-006 E = 0.00000e + 000
<Numerical Example 3>
Fno = 2.1 NA = 0.24
* R 1 = -12.000 D 1 = 20.00
R 2 = 72.840 D 2 = 1.80 N 1 = 1.77250 ν 1 = 49.6
R 3 = -2228.821 D 3 = 0.12
R 4 = 27.317 D 4 = 1.60 N 2 = 1.77250 ν 2 = 49.6
R 5 = 88.452 D 5 = 0.30
* R 6 = 96.287 D 6 = 0.80 N 3 = 1.80518 ν 3 = 25.4
* R 7 = 5.285 D 7 = 10.00
R 8 = 64.434 D 8 = 8.09 N 4 = 1.84666 ν 4 = 23.9
R 9 = -15.593 D 9 = 4.46
R10 = 27.039 D10 = 1.80 N5 = 1.77250 ν5 = 49.6
R11 = -78.220 D11 = 1.00
R12 = Aperture D12 = 1.50
R13 = −6.568 D13 = 2.20 N 6 = 1.84666 ν 6 = 23.9
R14 = 6.366 D14 = 2.00 N 7 = 1.77250 ν 7 = 49.6
R15 = -14.479 D15 = 0.10
R16 = 12.093 D16 = 1.82 N 8 = 1.60311 ν 8 = 60.6
R17 = -12.636 D17 = 0.10
R18 = 7.498 D18 = 1.50 N 9 = 1.83481 ν 9 = 42.7
R19 = 21.068 D19 = 1.50
R20 = ∞ D20 = 4.00 N10 = 1.51633 ν10 = 64.1
R21 = ∞
-Aspherical coefficient 1st surface: K = -2.00000e + 000 A = 0.00000e + 000 B = 0.00000e + 000
C = 0.00000e + 000 D = 0.00000e + 000 E = 0.00000e + 000
6th surface: K = -3.05503e + 002 A = 0.000000 + 000 B = -1.12677e-003
C = -3.27765e-005 D = -2.22188e-006 E = 0.00000e + 000
Surface 7: K = 1.15723e-001 A = 0.00000e + 000 B =-1.16248e-003
C = -1.50088e-004 D = -3.68542e-006 E = 0.00000e + 000
<Numerical Example 4>
Fno = 2.5 NA = 0.19
* R 1 = -12.000 D 1 = 19.77
R 2 = 21.137 D 2 = 3.60 N 1 = 1.77250 ν 1 = 49.6
R 3 = 787.493 D 3 = 0.80
* R 4 = -132.870 D 4 = 1.00 N 2 = 1.84666 ν 2 = 23.9
* R 5 = 17.021 D 5 = 6.11
R 6 = ∞ D 6 = 13.50 N 3 = 1.83400 ν 3 = 37.2
R 7 = ∞ D 7 = 0.15
* R 8 = 17.745 D 8 = 3.20 N 4 = 1.58913 ν 4 = 61.2
* R 9 = -21.515 D 9 = 0.00
R10 = −189.656 D10 = 0.60 N 5 = 1.72916 ν 5 = 54.7
R11 = 9.663 D11 = 1.28
R12 = -10.856 D12 = 0.50 N6 = 1.60311 ν6 = 60.6
R13 = 13.442 D13 = 1.50 N 7 = 1.84666 ν 7 = 23.9
R14 = 108.847 D14 = 0.00
R15 = Aperture D15 = 0.60
* R16 = 13.949 D16 = 2.00 N 8 = 1.69350 ν 8 = 53.2
* R17 = -55.208 D17 = 0.00
R18 = −92.686 D18 = 0.60 N 9 = 1.64769 ν 9 = 33.8
R19 = 9.042 D19 = 1.60 N10 = 1.80518 ν10 = 25.4
R20 = 22.476 D20 = 0.00
R21 = 13.130 D21 = 0.60 N11 = 1.84666 ν11 = 23.9
R22 = 7.714 D22 = 3.50 N12 = 1.48749 ν12 = 70.2
R23 = -15.054 D23 = 0.15
* R24 = 11.585 D24 = 1.80 N13 = 1.52280 ν13 = 62.3
R25 = 16.756 D25 = 0.00
R26 = 23.806 D26 = 1.25 N14 = 1.88300 ν14 = 40.8
R27 = 6.466 D27 = 3.77 N15 = 1.48749 ν15 = 70.2
R28 = 258.606 D28 = 0.00
R29 = ∞ D29 = 2.00 N16 = 1.51633 ν16 = 64.1
R30 = ∞
-Aspheric coefficient 1st surface: K = -2.20000e + 000 A = 0.00000e + 000 B = 0.00000e + 000
C = 0.00000e + 000 D = 0.00000e + 000 E = 0.00000e + 000
4th surface: K = 7.30117e-004 A = 0.00000e + 000 B = -1.63313e-004
C = 1.09260e-006 D = 0.00000e + 000 E = 0.00000e + 000
Fifth side: K = -3.12547e-002 A = 0.000000 + 000 B = -2.45102e-004
C = 2.00934e-006 D = 0.00000e + 000 E = 0.00000e + 000
8th surface: K = 2.89732e + 000 A = 0.00000e + 000 B = -9.11558e-005
C = 2.46766e-006 D = -8.04498e-008 E = 1.50874e-009
Surface 9: K = 2.27135e + 000 A = 0.00000e + 000 B = 4.75217e-005
C = 3.52674e-006 D = -9.84940e-008 E = 2.04550e-009
16th surface K = 2.61714e + 000 A = 0.000000 + 000 B = 5.08672e-005
C = -2.05979e-005 D = 3.83826e-006 E = -1.84585e-007
17th surface: K = -1.25046e + 002 A = 0.00000e + 000 B = 2.53545e-004
C = -2.29193e-005 D = 4.38482e-006 E = -1.97983e-007
<Numerical example 5>
f = 6.35 to 29.98 Fno = 3.55 to 4.47 NA = 0.14 to 0.11
2ω = 31.6 ° ～ 6.9 °
R 1 = 27.233 D 1 = 1.00 N 1 = 1.84666 ν 1 = 23.9
R 2 = 12.108 D 2 = 3.37
R 3 = ∞ D 3 = 13.50 N 2 = 1.83400 ν 2 = 37.2
R 4 = ∞ D 4 = 0.15
* R 5 = 17.745 D 5 = 3.20 N 3 = 1.58913 ν 3 = 61.2
* R 6 = -21.515 D 6 = Variable R 7 = -189.656 D 7 = 0.60 N 4 = 1.72916 ν 4 = 54.7
R 8 = 9.663 D 8 = 1.28
R 9 = -10.856 D 9 = 0.50 N 5 = 1.60311 ν 5 = 60.6
R10 = 13.442 D10 = 1.50 N 6 = 1.84666 ν 6 = 23.9
R11 = 108.847 D11 = variable
R12 = Aperture D12 = 0.60
* R13 = 13.949 D13 = 2.00 N 7 = 1.69350 ν 7 = 53.2
* R14 = -55.208 D14 = variable R15 = -92.686 D15 = 0.60 N 8 = 1.64769 ν 8 = 33.8
R16 = 9.042 D16 = 1.60 N9 = 1.80518 ν9 = 25.4
R17 = 22.476 D17 = Variable
R18 = 13.130 D18 = 0.60 N10 = 1.84666 ν10 = 23.9
R19 = 7.714 D19 = 3.50 N11 = 1.48749 ν11 = 70.2
R20 = -15.054 D20 = 0.15
* R21 = 11.585 D21 = 1.80 N12 = 1.52280 ν12 = 62.3
R22 = 16.756 D22 = Variable
R23 = 23.806 D23 = 1.25 N13 = 1.88300 ν13 = 40.8
R24 = 6.466 D24 = 3.77 N14 = 1.48749 ν14 = 70.2
R25 = 258.606 D25 = variable
R26 = ∞ D26 = 2.00 N15 = 1.51633 ν15 = 64.1
R27 = ∞


\ Focal length 6.35 12.39 29.98
Variable interval \
D 6 0.50 7.04 13.59
D11 13.69 7.14 0.60
D14 0.45 0.45 0.45
D17 6.76 4.23 1.62
D22 0.75 3.28 5.89
D25 6.00 6.00 6.00
・ Aspheric coefficient
Fifth side: K = 2.89732e + 000 A = 0.00000e + 000 B = -9.11558e-005
C = 2.46766e-006 D = -8.04498e-008 E = 1.50874e-009
Side 6: K = 2.27135e + 000 A = 0.00000e + 000 B = 4.75217e-005
C = 3.52674e-006 D = -9.84940e-008 E = 2.04550e-009
Side 13: K = 2.61714e + 000 A = 0.00000e + 000 B = 5.08672e-005
C = -2.05979e-005 D = 3.83826e-006 E = -1.84585e-007
14th: K = -1.25046e + 002 A = 0.000000 + 000 B = 2.53545e-004
C = -2.29193e-005 D = 4.38482e-006 E = -1.97983e-007
21st surface: K = 2.54164e + 000 A = 0.00000e + 000 B = -1.85457e-004
C = -7.88873e-006 D = 3.08221e-007 E = -9.96643e-009
<Numerical Example 6>
f = 2.19 Fno = 3.26 NA = 0.15 2ω = 171.0 °
R 1 = 36.775 D 1 = 2.50 N 1 = 1.77250 ν 1 = 49.6
R 2 = 18.294 D 2 = 16.74
R 3 = -97.434 D 3 = 2.00 N 2 = 1.80610 ν 2 = 40.9
R 4 = 20.684 D 4 = 2.98
R 5 = 43.550 D 5 = 3.00 N 3 = 1.69680 ν 3 = 55.5
R 6 = 81.881 D 6 = 12.22
R 7 = -28.470 D 7 = 3.00 N 4 = 1.84666 ν 4 = 23.9
R 8 = -25.016 D 8 = 21.15
* R 9 = 21.335 D 9 = 2.50 N 5 = 1.61800 ν 5 = 63.3
* R10 = -49.105 D10 = variable R11 = 77.468 D11 = 0.60 N 6 = 1.72916 ν 6 = 54.7
R12 = 9.706 D12 = 1.24
R13 = -11.629 D13 = 0.50 N7 = 1.60311 ν7 = 60.6
R14 = 15.020 D14 = 1.50 N 8 = 1.84666 ν 8 = 23.9
R15 = 53.093 D15 = variable
R16 = Aperture D16 = 0.60
* R17 = 13.385 D17 = 2.00 N 9 = 1.69350 ν 9 = 53.2
* R18 = -56.781 D18 = 0.45
R19 = -1410.339 D19 = 0.60 N10 = 1.64769 ν10 = 33.8
R20 = 8.666 D20 = 1.60 N11 = 1.80518 ν11 = 25.4
R21 = 18.656 D21 = Variable
R22 = 13.719 D22 = 0.60 N12 = 1.84666 ν12 = 23.9
R23 = 7.523 D23 = 3.50 N13 = 1.48749 ν13 = 70.2
R24 = -19.369 D24 = 0.15
* R25 = 11.357 D25 = 1.80 N14 = 1.52280 ν14 = 62.3
R26 = 19.903 D26 = Variable
R27 = 16.278 D27 = 1.42 N15 = 1.88300 ν15 = 40.8
R28 = 6.564 D28 = 3.52 N16 = 1.48749 ν16 = 70.2
R29 = 37.624 D29 = 6.00
R30 = ∞ D30 = 3.00 N17 = 1.51633 ν17 = 64.1
R31 = ∞

\ Focal length 2.19 3.94 10.54
Variable interval \
D10 0.50 7.04 13.59
D15 13.70 7.15 0.61
D21 10.30 6.99 0.61
D26 0.78 4.10 10.48

・ Aspheric coefficient 9th surface: K = 2.92618e + 000 A = 0.000000 + 000 B = -5.16439e-005
C = 1.92101e-006 D = -1.05228e-007 E = 9.550325e-010
10th surface: K = 2.21227e + 000 A = 0.00000e + 000 B = 1.06599e-006
C = 2.05150e-006 D = -1.17857e-007 E = 1.32070e-009
Surface 17: K = 1.10143e + 000 A = 0.00000e + 000 B = 1.00738e-004
C = -1.39131e-005 D = 4.21520e-006 E = -1.57702e-007
18th surface: K = -1.24713e + 002 A = 0.000000 + 000 B = 2.21519e-004
C = -1.31403e-005 D = 4.80345e-006 E = -1.82939e-007
25th surface: K = 2.15826e + 000 A = 0.000000 + 000 B = -1.22398e-004
C = -6.06877e-006 D = 4.07232e-007 E = -1.46126e-00
<Numerical Example 7>
f = 6.35 to 29.71 Fno = 3.30 to 5.15 NA = 0.15 to 0.97
2ω = 31.6 ° ～ 6.9 °
R 1 = 25.467 D 1 = 1.00 N 1 = 1.80809 ν 1 = 22.8
R 2 = 15.992 D 2 = 21.15
* R 3 = 21.335 D 3 = 2.50 N 2 = 1.61800 ν 2 = 63.3
* R 4 = -49.105 D 4 = variable R 5 = 77.468 D 5 = 0.60 N 3 = 1.72916 ν 3 = 54.7
R 6 = 9.706 D 6 = 1.24
R 7 = -11.629 D 7 = 0.50 N 4 = 1.60311 ν 4 = 60.6
R 8 = 15.020 D 8 = 1.50 N 5 = 1.84666 ν 5 = 23.9
R 9 = 53.093 D 9 = variable
R10 = Aperture D10 = 0.60
* R11 = 13.385 D11 = 2.00 N 6 = 1.69350 ν 6 = 53.2
* R12 = -56.781 D12 = 0.45
R13 = -1410.339 D13 = 0.60 N 7 = 1.64769 ν 7 = 33.8
R14 = 8.666 D14 = 1.60 N 8 = 1.80518 ν 8 = 25.4
R15 = 18.656 D15 = Variable
R16 = 13.719 D16 = 0.60 N9 = 1.84666 ν9 = 23.9
R17 = 7.523 D17 = 3.50 N10 = 1.48749 ν10 = 70.2
R18 = -19.369 D18 = 0.15
* R19 = 11.357 D19 = 1.80 N11 = 1.52280 ν11 = 62.3
R20 = 19.903 D20 = variable
R21 = 16.278 D21 = 1.42 N12 = 1.88300 ν12 = 40.8
R22 = 6.564 D22 = 3.52 N13 = 1.48749 ν13 = 70.2
R23 = 37.624 D23 = 6.00
R24 = ∞ D24 = 3.00 N14 = 1.51633 ν14 = 64.1
R25 = ∞

\ Focal length 6.35 11.46 29.71
Variable interval \
D 4 0.50 7.04 13.59
D 9 13.70 7.15 0.61
D15 10.30 7.04 0.61
D20 0.78 4.05 10.48

・ Aspheric coefficient
Third side: K = 2.92618e + 000 A = 0.000000 + 000 B = -5.16439e-005
C = 1.92101e-006 D = -1.05228e-007 E = 9.550325e-010
4th page: K = 2.21227e + 000 A = 0.00000e + 000 B = 1.06599e-006
C = 2.05150e-006 D = -1.17857e-007 E = 1.32070e-009
11th surface: K = 1.10143e + 000 A = 0.00000e + 000 B = 1.00738e-004
C = -1.39131e-005 D = 4.21520e-006 E = -1.57702e-007
12th surface: K = -1.24713e + 002 A = 0.000000 + 000 B = 2.21519e-004
C = -1.31403e-005 D = 4.80345e-006 E = -1.82939e-007
19th surface: K = 2.15826e + 000 A = 0.000000 + 000 B = -1.22398e-004
C = -6.06877e-006 D = 4.07232e-007 E = -1.46126e-008
<Numerical Example 8>
f = -2.55 Fno = 2.50 NA = 0.20 2ω = 34.8 °
R 1 = -5.590 D 1 = 1.10 N 1 = 1.88300 ν 1 = 40.8
R 2 = -12.089 D 2 = 0.12
R 3 = 3.848 D 3 = 1.80 N 2 = 1.48749 ν 2 = 70.2
R 4 = 17.036 D 4 = 1.00
R 5 = Sub-aperture D 5 = 1.00
R 6 = 13.806 D 6 = 2.00 N 3 = 1.84666 ν 3 = 23.9
R 7 = 3.849 D 7 = 1.36
R 8 = 21.513 D 8 = 1.70 N 4 = 1.71300 ν 4 = 53.9
R 9 = -4.104 D 9 = 8.75
R10 = 54.980 D10 = 1.40 N 5 = 1.48749 ν 5 = 70.2
R11 = -13.136 D11 = 0.12
R12 = 3.641 D12 = 2.80 N6 = 1.48749 ν6 = 70.2
R13 = -17.920 D13 = 0.36
R14 = -5.925 D14 = 0.80 N 7 = 1.88300 ν 7 = 40.8
R15 = -90.733 D15 = 13.86
R16 = 64.434 D16 = 8.09 N8 = 1.84666 ν8 = 23.9
R17 = -15.593 D17 = 4.55
R18 = 27.039 D18 = 1.80 N 9 = 1.77250 ν 9 = 49.6
R19 = -78.220 D19 = 1.00
R20 = Aperture D20 = 1.50
R21 = −6.568 D21 = 2.20 N10 = 1.84666 ν10 = 23.9
R22 = 6.366 D22 = 2.00 N11 = 1.77250 ν11 = 49.6
R23 = -14.479 D23 = 0.10
R24 = 12.093 D24 = 1.82 N12 = 1.60311 ν12 = 60.6
R25 = -12.636 D25 = 0.10
R26 = 7.498 D26 = 1.50 N13 = 1.83481 ν13 = 42.7
R27 = 21.068 D27 = 1.50
R28 = ∞ D28 = 4.00 N14 = 1.51633 ν14 = 64.1
R29 = ∞

The object of the present invention can also be achieved by executing the following processing. That is, a storage medium that records a program code of software that realizes the functions of the above-described embodiments is supplied to a system or apparatus, and a computer (or CPU, MPU, etc.) of the system or apparatus is stored in the storage medium. This is the process of reading the code.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention.

  Moreover, the following can be used as a storage medium for supplying the program code. For example, floppy (registered trademark) disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW, magnetic tape, nonvolatile memory card, ROM or the like. Alternatively, the program code may be downloaded via a network.

  Further, the present invention includes a case where the function of the above-described embodiment is realized by executing the program code read by the computer. In addition, an OS (operating system) running on the computer performs part or all of the actual processing based on an instruction of the program code, and the functions of the above-described embodiments are realized by the processing. Is also included.

  Furthermore, a case where the functions of the above-described embodiment are realized by the following processing is also included in the present invention. That is, the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Thereafter, based on the instruction of the program code, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing.

It is sectional drawing which shows schematic structure of the optical apparatus concerning 1st Embodiment. It is a conceptual diagram which shows the structure of the partial reflection mirror which can be used as a common reflection member in FIG. FIG. 2 is an image view showing a schematic shape of a formed image formed on, for example, a rectangular imaging element IP in the optical device of FIG. 1. FIG. 2 is an optical path diagram illustrating a first concrete example of the optical device illustrated in FIG. 1. FIG. 6 is an optical path diagram illustrating a second concrete example of the optical device illustrated in FIG. 1. It is a block diagram of the wide angle optical system which concerns on the said 1st concrete example to which the numerical value shown in Numerical Example 1 is applied. It is a block diagram of the telephoto optical system which concerns on the said 1st concrete example to which the numerical value shown in Numerical Example 2 is applied. FIG. 6 is an image view showing a schematic shape of a formed image obtained by the optical device of FIG. 5. FIG. 6 is an optical path diagram illustrating a third concrete example of the optical device illustrated in FIG. 1. It is a block diagram of the wide-angle optical system in FIG. 9 to which the numerical value shown in Numerical Example 6 is applied. It is a block diagram of the telephoto optical system in FIG. 9 to which the numerical value shown in Numerical Example 7 is applied. It is sectional drawing which shows schematic structure of the optical apparatus concerning 2nd Embodiment. FIG. 13 is an optical path diagram illustrating a first concrete example of the optical device illustrated in FIG. 12. It is a block diagram of the wide angle optical system which concerns on the 1st concrete example to which the numerical value shown in Numerical Example 3 is applied. FIG. 13 is an optical path diagram illustrating a second concrete example of the optical device illustrated in FIG. 12. It is a block diagram of the wide angle optical system which concerns on the said 2nd concrete example to which the numerical value shown in Numerical Example 4 is applied. It is a block diagram of the telephoto optical system which concerns on the said 2nd concrete example to which the numerical value shown in Numerical Example 5 is applied. It is sectional drawing which shows schematic structure of the optical apparatus concerning 3rd Embodiment. FIG. 19 is an optical path diagram illustrating a first concrete example of the optical device illustrated in FIG. 18. FIG. 20 is a configuration diagram of a telephoto optical system according to the first concrete example of FIG. 19. FIG. 19 is an optical path diagram illustrating a second concrete example of the optical device illustrated in FIG. 18. It is sectional drawing which shows schematic structure of the optical apparatus concerning 4th Embodiment. FIG. 23 is an optical path diagram illustrating a concrete example of the optical device illustrated in FIG. 22. It is a conceptual diagram which shows the example of installation of the imaging device carrying the optical device which concerns on embodiment. It is sectional drawing which shows schematic structure of the mechanism of the imaging device in FIG. It is a conceptual diagram which shows the initial state image state at the time of the object recognition by the imaging device carrying the optical device which concerns on embodiment. It is a block diagram which shows the electrical structural example of the imaging device carrying the optical apparatus which concerns on embodiment. It is a flowchart which shows the flow of the moving body tracking operation | movement after performing object recognition by the imaging device carrying the optical device which concerns on embodiment. It is a figure which shows the longitudinal aberration of the fish-eye optical system of Numerical Example 1. FIG. 6 is a diagram illustrating longitudinal aberrations of a telephoto optical system according to Numerical Example 2. FIG. 10 is a diagram illustrating lateral aberration of the wide-angle reflective optical system in Numerical Example 3. FIG. 10 is a diagram showing transverse aberration at the wide-angle end of the wide-angle reflective optical system in Numerical Example 4. 10 is a diagram illustrating longitudinal aberrations at the wide-angle end of a telephoto variable magnification optical system according to Numerical Example 5. FIG. 10 is a diagram illustrating longitudinal aberrations in the middle of the telephoto variable magnification optical system according to Numerical Example 5. FIG. 10 is a diagram illustrating longitudinal aberrations at a telephoto end of a telephoto variable magnification optical system according to Numerical Example 5. FIG. It is a figure which shows the longitudinal aberration in the wide-angle end of the fisheye optical system of Numerical Example 6. It is a figure which shows the longitudinal aberration in the wide angle end of the telephoto variable magnification optical system of Numerical Example 7. FIG. 10 is a diagram illustrating longitudinal aberrations in the middle of the telephoto variable magnification optical system according to Numerical Example 7. It is a figure which shows the longitudinal aberration in the telephoto end of the telephoto variable magnification optical system of Numerical Example 7. FIG. 10 is a diagram illustrating longitudinal aberrations of the telephoto secondary imaging optical system in the numerical value example 8. It is a figure which shows the numerical formula which calculates the displacement amount to an optical axis direction from a lens vertex.

Explanation of symbols

IP imaging device 11 common optical system 12 common reflecting member 13 second objective optical system 14 light blocking member 15 first objective optical system 16 light blocking member 15A first objective optical system 15A-1 reflecting member 13A second objective optical system 13B second objective Optical system

Claims (8)

An imaging apparatus comprising: an optical device; and an imaging unit that photoelectrically converts an object image formed by the optical device into an electrical signal,
The optical device comprises:
A first optical system for capturing a first subject image having negative refractive power and an optical system common to at least a part of the first optical system, and capturing a second subject image A first optical system that shields a part of the first optical system including a central portion of a subject image, and a second optical system for reflecting, a semi-transmissive or partially reflective reflecting member provided in the common optical system, and the first optical system. A light shielding means,
The second optical system has a positive lens and a negative lens, and has a longer focal point than the first optical system,
The second optical system forms the second subject image through the reflecting member in an area corresponding to the light-shielding area of the first optical system in the imaging unit ,
The pixel pitch of the imaging means is “L”, the NA value of the optical system having the larger NA value among the first optical system and the second optical system is “N”, and the allowable difference width is “ΔIP”. When
The following conditional expression
ΔIP ≧ 10 · L / 2 · N
An imaging device characterized by satisfying the above. The imaging region formed by the second optical system, an imaging according to claim 1, characterized in that it is set to be smaller than the imaging area formed by the first optical system apparatus. The first optical system has a reflecting member of the conical shape with its apex in the traveling direction of the reflection member or the incident light of the convex surface with the convex surface facing the traveling direction of the incident light, the reflected image of the reflective member The imaging apparatus according to claim 1, wherein an image is formed . The imaging apparatus according to claim 1, wherein the first optical system includes an optical system having a function of a wide-angle lens or a fish-eye lens having an angle of view of 90 ° or more. 5. The imaging apparatus according to claim 1, wherein a second light shielding unit having an opening is provided on a light incident side of the second optical system. The imaging apparatus according to claim 1, further comprising a second reflecting member for deflecting a light beam passing through the second optical system. The imaging apparatus according to claim 6, wherein the second reflecting member and the second optical system are movable. A pan drive mechanism for driving the pre-SL-optical device in the pan direction,
The imaging apparatus according to claim 1, further comprising a tilt drive mechanism that drives the optical device in a tilt direction.

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