JP2007011149A - Variable reflection angle prism and portable device with camera using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable reflection angle prism capable of reducing a load on a drive unit due to dropping or the like and improving impact resistance, and a portable device with a camera using the same.
SOLUTION: A prism main body, a reflecting plate disposed opposite to a reflecting surface of the prism main body, driving means for tilting the reflecting plate about two orthogonal axes, and the prism main body and the reflecting plate. And a filling material that can follow the driving of the reflecting plate, and when the reflecting plate is driven by the driving means, the reflection angle is changed without changing the angle of the prism body. It becomes variable.
[Selection] Figure 2

Description

  The present invention relates to a reflection angle variable prism of a shake correction apparatus used to prevent image quality degradation caused by camera shake vibration during photographing, and in particular, shake correction by tilting a reflecting surface of a bending optical system. The present invention relates to a camera-equipped mobile device having a shake correction mechanism for performing the above.

  When handheld shooting is performed with a shooting device such as a camera, vibration may be applied to the shooting device due to camera shake vibration at the time of shooting, and an image captured by the image sensor may be blurred, resulting in an unclear image. Further, this image blur is particularly noticeable when shooting in a dark place or telephoto shooting.

  Conventionally, many digital cameras and still cameras have a grip shape, the position and shape of the shutter button, etc. to prevent camera shake caused by imperfect positioning during shooting or the pressing force when the shutter button is pressed. Devised. However, camera shake cannot be completely prevented only with the shape.

  In particular, in a portable device with a camera, priority is given to satisfying portability, designability, etc., so there is a limitation on the shape and weight, and it is difficult to prevent camera shake by devising the shape.

  In order to prevent such image blurring, the camera shakes the captured image by detecting external vibrations and dynamically displacing the optical system inside the camera so as to cancel the influence of the vibrations on the image blurring. A technique for reducing this has been proposed.

  For example, in Patent Document 1, a bending optical system that uses a mirror or a prism to bend the optical system 90 degrees to make the camera thin is used, and the amount of camera shake detected by camera shake detection means is used. Based on this, a method has been proposed in which the necessary tilt angle of the blur correction optical system is calculated, and the reflection surface of the bending optical system is tilted by displacing a mirror or a prism to reduce the blur of the captured image.

Here, in the bending optical system, it is desirable to use a prism from the viewpoint that the entire length of the optical system can be shortened by shortening the focal length and the contamination of the reflecting surface can be prevented. In most bending optical systems, the prism is used. Is used.
JP 2004-219930 A

  However, the above-described prior art has the following problems.

  In a bending optical system that tilts the reflecting surface of the bending optical system by driving the prism, it is necessary to support a prism with a large mass only by the driving unit. The load on the drive unit is large, and the drive unit is damaged. In particular, since a camera-equipped mobile device is always carried, there is a high possibility of dropping, and improvement in impact resistance becomes a problem.

  In addition, in a mobile device with a camera, power consumption is required to consume power for screen display, text input, telephone conversation, and the like. However, at the time of blur correction of the bending optical system, a large driving force is required to drive the prism, and a large amount of power is used.

  The present invention has been made in view of the above problems, and its purpose is to improve impact resistance by reducing the load on the drive unit due to dropping or the like, and to reduce power consumption. It is an object to provide a portable device with a camera provided with a variable reflection angle prism and a shake correction mechanism using the same.

  In order to achieve the above object, a reflection angle variable prism according to the present invention includes a prism main body, a reflection plate arranged to face one surface of the prism main body so as to be a reflection surface of the prism main body, and the reflection plate. Drive means for tilting two orthogonal axes, and a filling material disposed between the prism main body and the reflector and following the tilt of the reflector.

  According to the reflection angle variable prism having the above configuration, the reflection angle of the incident light to the prism can be changed by driving the reflection plate with the driving means while fixing the prism body. Since the prism main body and the reflecting surface (reflecting plate) to be driven can be separated, and the portion supported by the driving unit is only a reflecting plate having a small weight, the load applied to the driving unit when dropped can be reduced. Therefore, it is possible to improve impact resistance. Furthermore, since only the light reflector is driven, it can be driven with a small driving force, and the power consumption can be reduced.

  The variable reflection angle prism of the present invention is characterized in that the filling material is made of a liquid.

  According to the reflection angle variable prism having the above-described configuration, since the filling material is a liquid, it is easily deformed, and it becomes easy to drive the reflecting plate for performing camera shake correction.

  In the variable reflection angle prism of the present invention, the filling material is made of gel.

  According to the reflection angle variable prism having the above-described configuration, it is not necessary to provide a means for preventing leakage of the filling material. Alternatively, it can be simplified even when a means for preventing leakage is provided.

  In addition, according to the variable reflection angle prism of the present invention, it has means for preventing leakage of the filling material.

  According to the reflection angle variable prism having the above configuration, the filling material can be prevented from flowing out.

In the variable reflection angle prism according to the present invention, when the refractive index of the prism body is n ₁ and the refractive index of the filling material is n ₂ , the refractive index n ₂ of the filling material is expressed by the following formula (1). It is good also as the range which satisfy | fills.

  According to the reflection angle variable prism having the above configuration, the incident light to the prism is not totally reflected, and all or a part of the incident light can be reflected by the reflecting plate.

In the reflection angle variable prism of the present invention, when the refractive index of the prism body is n ₁ , the refractive index of the filling material is n ₂ , and the reflectance is a, the refractive index n ₂ of the filling material is It is good also as a range which satisfy | fills Formula (2).

  According to the reflection angle variable prism having the above configuration, the reflectance of incident light can be set to a or less.

  Further, the reflection angle variable prism of the present invention is configured such that the refractive index of the filling material disposed between the prism body and the reflector is 0.96 to 1.04 times the refractive index of the prism body. May be.

  According to the reflection angle variable prism having the above configuration, the reflectance of the incident light to the prism can be 4% (the reflectance on the surface of a general hand mirror) or less.

  In the reflection angle variable prism of the present invention, it is preferable that the refractive index of the filling material disposed between the prism main body and the reflection plate is substantially equal to the refractive index of the prism main body.

  According to the reflection angle variable prism having the above configuration, the reflection angle can be changed without attenuating the incident light to the prism.

  In the reflection angle variable prism according to the present invention, the driving means for the reflecting plate may be a piezoelectric element.

  Piezoelectric elements are suitable for driving means because of their high reactivity and easy miniaturization.

  Further, the present invention provides a camera-equipped portable device comprising a camera shake correction mechanism using the variable reflection angle prism.

  According to the portable device with a camera equipped with the camera shake correction mechanism using the variable reflection angle prism of the present invention, the optical system can be displaced by driving the reflecting plate, so that the camera shake is effectively prevented. be able to. Furthermore, since the reflecting surface of the bending optical system can be tilted by driving the reflecting plate, it is possible to realize an improvement in impact resistance and a reduction in power consumption.

  As apparent from the above, according to the variable reflection angle prism of the present invention, it is possible to reduce the load on the drive unit due to dropping or the like and to improve the impact resistance. Further, since the driven part is only the reflector, it can be driven with a small driving force, and the power consumption can be reduced.

  Furthermore, according to the portable device with a camera provided with the camera shake correction mechanism using the variable reflection angle prism according to the present invention, it is possible to provide a portable device with a camera that achieves improved impact resistance and low power consumption.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment.

  First, a reflection angle variable prism in a shake correction apparatus that changes the reflection angle will be described with reference to FIGS.

  FIG. 1 is a perspective view of a variable reflection angle prism according to the first embodiment of the present invention. 2 is a cross-sectional view of the main part of the reflection angle variable prism according to the first embodiment of the present invention, and FIG. 3 is an exploded perspective view of the reflection angle variable prism according to the first embodiment of the present invention. . FIG. 4 is a cross-sectional view of an essential part of a reflection angle variable prism according to the second embodiment of the present invention.

  As shown in FIGS. 1 to 4, a reflecting plate 13 is disposed to face one surface of the prism body 11 so as to be a reflecting surface of the prism body 11, and between the prism body 11 and the reflecting plate 13. Is provided with a filling material 12 that can follow the tilt of the reflecting plate 13. The prism body 11 is fixed to a housing (not shown). Further, the central shaft 16 is fixed at one end to the housing and at the other end to the reflecting plate 13.

  Piezoelectric elements are used as the two driving means 15 for giving displacement to the reflecting plate 13. When a voltage is applied to the piezoelectric elements, the direction perpendicular to the reflecting plate 13, which is the direction of the arrow in FIGS. It is displaced to. One end of each driving means 15 is in contact with or connected to the two protrusions 14 on the reflecting plate 13, and the other end is fixed to a housing (not shown) via a driving means fixing member (not shown). Has been. Therefore, the angle of the reflecting plate 13 can be displaced in the arrow direction in FIGS. 2 and 4 without driving the prism body 11.

  Subsequently, the arrangement relationship between the central shaft 16 and the two protrusions 14 attached to the reflecting plate 13 will be described with reference to FIG. In FIG. 3, the reflecting plate 13 is provided with a central axis 16 at a substantially central portion thereof, and the center position (tilt center position) of the central axis 16 and the driving means 15 and the reflecting plate 13 are in contact with or connected to each other. The positions of the protrusions 14 are arranged so as to form apex angles of right-angled isosceles triangles. With the above configuration, it is possible to tilt the reflecting plate 13 serving as a reflecting surface of the bending optical system in two orthogonal directions (pitching direction and yawing direction).

  Further, as the material of the central shaft 16, when the projection 14 is displaced in the direction of the arrow in FIGS. 2 and 4, if the central shaft 16 is stretched in the longitudinal direction of the central shaft as a result of receiving a tensile load, Since the tilt amount of the plate 13 becomes small or, in the worst case, the tilt does not occur, a metal or a resin material having a high tensile rigidity is desirable.

  Here, the piezoelectric element used as the driving means of this embodiment has a risk of damaging the polarization state of the element when a voltage in the direction opposite to the polarization is applied. It is necessary to apply a voltage in the direction. Therefore, in order to tilt the reflector in the forward / reverse direction, for example, the initial position is set to a position of 15V, and the applied voltage of the piezoelectric element is changed to 0-30V, thereby moving the reflector in the forward / reverse direction. Can be tilted.

  According to the reflection angle variable prism according to the present invention, the prism main body and the reflecting plate to be driven can be separated, and the portion supported by the driving unit (center axis and driving means) is only the reflecting plate having a small weight. It is possible to reduce the load applied to the drive unit when dropped. Therefore, the impact resistance of the camera-equipped mobile phone can be improved.

  Furthermore, in order to displace the reflecting surface of the bending optical system, it is only necessary to drive the reflecting plate, so that it is possible to drive with less driving force than when driving a heavy prism main body and power consumption. Can be reduced. Further, when the reflecting plate can be tilted with a small driving force, for example, an electrostatic element can be used instead of the piezoelectric element, and power consumption can be reduced.

  Next, the filling substance 12 will be described. The filling material 12 is a material that can follow the tilt of the reflector, and is made of, for example, a gel or a liquid.

  As the case where the filling material is made of a gel, for example, an optical gel or the like is used.

  Since the gel is highly viscous, when the filling material is thin, by forming a film and placing it between the prism body and the reflector, as shown in FIG. 2, without using a means for preventing leakage, The outflow of the filling material can be prevented. Or when using the means which prevents a leak, it can be made simple.

  However, since the gel does not have fluidity, there is a concern that the density changes due to a shape change, a density distribution is generated, and the refractive index changes. Here, in applications where the tilt amount is small, such as that used for camera shake correction of a camera-equipped portable device, the amount of change in the refractive index with respect to the tilt amount can be reduced by increasing the thickness of the filling material. Further, for example, when an elastic body such as a resin is used as the filling substance, the same effect as that obtained when the gel is used can be obtained.

  On the other hand, when the filling material is made of a liquid, for example, a liquid having a uniform refractive index generally called matching oil, index oil, or immersion oil can be used. These liquids are, for example, fluorocarbon liquids, It consists of a substance composed of methylene iodide liquid, arsenic tripromide liquid, disulfide liquid, selenium compound, terphenyl, hydrogenated terphenyl, polybutane, liquid paraffin, bromonaphthalene, etc. An arbitrary refractive index can be obtained by appropriately adjusting.

  When the filling material is made of a liquid, as shown in FIG. 4, leakage prevention measures are taken between the prism main body 11 and the reflecting plate 13 by means for preventing leakage of the filling material 12 and sealed. Here, the means for preventing leakage includes a seal 20 or the like, and one end of the seal 20 is connected to the prism main body 11 and the other end is connected to the reflector 13 so that the filling material 12 does not leak out. It is like that. Further, the seal 20 can be deformed so that the relative position of the prism body 11 and the reflecting plate 13 for blur correction can be moved.

  Here, the thickness of the filling material may be larger than the driving amount of the reflector. For example, when the size of the reflecting surface of the prism body is 14 mm □ and the tilt angle is about 0.1 °, the driving amount of the reflecting plate is about 12 μm.

  The refractive index of the filling material 12 is preferably substantially equal to the refractive index of the prism body 11. When the refractive index of the prism body 11 and the refractive index of the filling material 12 are substantially equal, the light incident on the prism body 11 is reflected at the interface between the prism body 11 and the filling material 12 as shown in FIG. Instead, the light is transmitted and reflected at the interface between the filling material 12 and the reflecting plate 13.

  Therefore, without driving the prism body 11, the angle of the reflecting plate 13 is displaced in the direction of the arrow in FIG. 5 by the driving means 15 (shown in FIGS. 1 to 4), so that the incident light is not attenuated. It becomes possible to change the reflection angle.

  On the other hand, when the refractive index of the prism body 11 and the refractive index of the filling material 12 are different, as shown in FIG. 6, the rays incident on the prism body 11 are at least twice (A, B in FIG. 6) interface. At this time, reflection occurs, leading to stray light, and the amount of light decreases.

  Here, when total reflection occurs in at least one interface among the reflections, the reflected light in the bending direction by the prism cannot be obtained, so that the effect of the variable reflection angle prism according to the present invention cannot be obtained. .

  Hereinafter, the range of the refractive index of the filling material for preventing total reflection from occurring at both the interface A and the interface B will be described with reference to FIG.

As shown in FIG. 6, assuming that the refractive index of the prism body 11 is n _a , the refractive index of the filling material 12 is n _b , the incident angle is θ _a , and the reflection angle is θ _b , the incident angle θ _{a is obtained} from Snell's law. And the reflection angle θ _b is expressed by Expression (3).

Here, since the reflection angle theta _b may becomes smaller than 90 degrees for total reflection does not occur at the interface A in FIG. 6 (a prism body 11 → filler material 12), the refractive index n _a of the prism body 11 and the refractive index n _b of the filling material 12 may be in the range of formula (4). (The incident angle theta _a to prism for simplicity to 45 degrees.)

Similarly, for the total reflection does not occur at the interface (the filling material 12 → prism body 11) in B of FIG. 6, when a 45-degree angle of incidence theta _c, the refractive index n _a and the filling of the prism main body 11 refractive index n _b of the material 12 may be in a range of equation (5) below.

Therefore, from the equations (4) and (5), in order to total reflection does not occur in any of the interface A and interface B, the range of the refractive index n _b of the filling material 12 in the formula (6) There must be.

Here, unlike the refractive index and n _a of the prism body 11, and the refractive index n _b of the filling material 12, when the refractive index n _b of the filling material 12 is in the range of the above formula (6), A in FIG. 6 At the two interfaces B and B, the incident light is partially reflected to become stray light, resulting in transmission loss. The allowable range of transmission loss varies depending on the application. For example, it is up to several tens of percent for laser deflection and several percent for camera applications. In addition, since the reflectance on the surface of a general hand mirror (a type in which aluminum is vapor-deposited on the back surface of glass) is about 4%, this embodiment shows a case where the reflectance is 4% or less.

  In the following, the range of the refractive index of the filling material so that the reflectance is 4% or less will be described with reference to FIG. 6 and FIG.

As shown in FIG. 7, the incident angle and the reflection angle of the light beam when the light beam is incident from the _first material 18 (refractive index n ₁ ) side toward the second material 19 (refractive index n ₂ ) side are as follows. Let them be θ ₁ and θ ₂ respectively. The reflectivity at the interface between the first substance 18 and the second substance 19 differs between the reflectivity of polarized light (p-polarized light) parallel to the incident surface and the polarized light (s-polarized light) perpendicular to the incident surface. , Where R _p and R _s are respectively expressed by equations (7) and (8) from the Fresnel formula.

Here, since the reflectance R _p of p-polarized light is always smaller than the reflectance R _{s of} s-polarized light, attention is paid only to the reflectance R _s of s-polarized light. When θ _a is 45 degrees and Snell's law shown in Expression (3) is used, the reflectance R _sa of s-polarized light at the interface A in FIG. 6 is expressed as Expression (9).

Here, assuming that n _a and n _b are almost the same, and approximating (n _b / n _a ) ² ≈1, the reflectance R _sa of the s-polarized light at the interface A can be expressed as in equation (10). Can do.

Therefore, when the reflectance is a, the s-polarized reflectance R _sa at the interface A may be set to satisfy the formula (11) in order to make the reflectance a or less.

As shown in FIG. 6, since the light incident on the prism passes through the interface at least twice, similarly, when reflection at the interface B (filling material 12 → prism body 11) in FIG. 6 is considered, Assuming that the incident angle θ _c is 45 degrees, the reflectance R _sb of the s-polarized light at the interface B in FIG. 6 is expressed as in Expression (12).

Here, as in the case of the interface A, it is assumed that n _a and n _b are almost the same, and if approximated to (n _b / n _a ) ² _≈1 , the reflectance R _sb of s-polarized light at the interface B is reflected. It can be seen that the expression (13) should be satisfied in order to make the ratio a or less.

  Therefore, from the equations (11) and (13), the equation (14) needs to be satisfied in order to make the reflectance Rs equal to or less than a.

Using the relationship between the number (14), when the following reflectance a 4% (a = 0.04), the relationship between the refractive index _{n b} of the refractive index _{n a} and the filling material 12 of the prism body 11 May be in the range represented by equation (15). Here, the reflectance of the incident light to the prism can be changed by changing the refractive index of the filling material.

From the above, if the refractive index n _b of the filling material 12 in the range of formula (15), the reflectance of the incident light to the prism, be 4% or less the reflectance on the surface of ordinary hand mirror it can.

Here, when the reflectance a is small (10% or less), the relationship of Expression (16) is established. Therefore, the reflectance at the interface a following (a 10% or less) in order to suppress, the I range showing the relationship between the refractive index n _b of the refractive index n _a and material of the prism body by the formula (16) That's fine.

  As described above, when the refractive index of the filling material is different from the refractive index of the prism main body, the refractive index of the filling material may be set in the range of the above formula (16). When the refractive index of the filling material is within this range, the reflectance is a% or less.

  As described above, in the reflection angle variable prism according to the present invention, incident light transmitted through the prism body reaches the reflection plate and is reflected at the interface between the filling material and the reflection plate. Here, by changing the angle of the reflecting plate, the reflection angle of the incident light can be changed without changing the angle of the prism body.

  In addition, this invention is not limited to the said embodiment, It can implement in another various aspect.

  For example, the reflecting plate may be driven by an appropriate actuator other than the piezoelectric element, such as an electrostatic element. Further, the reflector is not limited to being driven by an angular change in two directions around a substantially single point. For example, the reflector may be supported using three or more piezoelectric elements and the central axis may be eliminated.

  Next, a camera-equipped mobile phone will be described as an example of a camera-equipped portable device provided with a camera shake correction mechanism using the variable reflection angle prism of the present invention, with reference to FIGS.

  First, the configuration of a camera unit provided with a camera shake correction mechanism using the variable reflection angle prism of the present invention will be described with reference to FIG.

  FIG. 8 is a perspective view of an essential part for explaining the internal parts of the camera unit. Here, the light incident from the direction of the arrow in the figure passes through the prism main body 11 and the filling material 12 of the blur correction device 17, is bent at a right angle by the reflecting plate 13, passes through the optical system 30, and is a CCD that is an image sensor An image is formed by focusing on the mold image sensor 40. The analog image signal from the CCD image sensor 40 is converted into a digital signal by an A / D converter, and after a predetermined signal processing such as image compression is performed by a digital signal processing unit, the image is stored in a memory.

  Next, a camera-equipped mobile phone provided with a camera shake correction mechanism using the variable reflection angle prism of the present invention will be described with reference to FIGS.

  FIG. 9 is a perspective view showing a first photographing mode (a photographing mode in which photographing is performed with the first housing 53 and the second housing 54 opened) of a mobile phone incorporating the blur correction device of the present invention. 10 is a perspective view showing a second shooting mode (shooting mode in which the first casing 53 and the second casing 54 are closed) in the same mobile phone.

  In the camera-equipped mobile phone, a blur correction device (not shown) includes a drive circuit in accordance with changes in angular velocity signals from the first angular velocity detection sensor and the second angular velocity detection sensor, which are blur detection sensors including a gyro sensor and the like. The driving means 15 (shown in FIGS. 1 to 4) is driven by the drive signal output from, and the biaxial direction (pitching direction, yawing) perpendicular to the reflection plate 13 (shown in FIGS. 1 to 6) of the shake correction apparatus is driven. Tilt in the direction). Thereafter, it is detected that the first photographing unit 50 shown in FIG. 9 or the second photographing unit 51 shown in FIG. 10 is pressed, and an image can be taken from the camera unit 52. Incident light on the camera unit 52 passes through the prism main body 11 and the optical system 30 of the blur correction device and is condensed on the CCD image sensor 40. Since the following image processing method is the same as that described above, the description thereof will be omitted. Note that the position of the camera unit 52 is not limited to the back side of the second casing 53, and may be provided on the second casing 54.

  Here, in the camera-equipped mobile phone, camera shake in various directions occurs due to the difference in shooting mode, and in addition, in the case of camera shake due to the pressing strength when the shutter button is pressed, the amount of blur is large, The optical system must be displaced by the camera shake correction mechanism.

  According to the camera-equipped mobile phone equipped with the camera shake correction mechanism using the variable reflection angle prism of the present invention, the optical system can be displaced by driving the reflecting plate, so that the impact resistance is improved and the power consumption is low. Can be realized.

  In the above embodiment, the openable camera-equipped mobile phone has been described. However, the present invention can be similarly applied to other types of mobile phones such as a mobile phone with a rotating display unit or a straight type mobile phone. And similar effects can be obtained.

  Furthermore, in the above-described embodiment, the camera-equipped mobile phone has been described as the camera-equipped mobile device. However, the camera-equipped mobile device is not limited to this, and a PDA (Personal Digital Assistant) having a photographing function or the like can be used. It may be a portable device.

  In addition, the present invention can be similarly implemented in other photographing devices such as a digital camera, and the same effect can be obtained by providing the camera shake correction mechanism using the reflection angle variable prism of the present invention. .

  According to the variable reflection angle prism of the present invention, it is possible to reduce the load on the drive unit due to dropping or the like and to improve the impact resistance. In addition, since the driven portion is only the reflecting plate and is light, it can be driven even when the driving force is small, and the power consumption can be reduced.

  Furthermore, according to the portable device with a camera using the variable reflection angle prism according to the present invention, it is possible to realize a portable device with a camera that achieves improved impact resistance and low power consumption.

  The variable reflection angle prism of the present invention can be applied to general blur correction apparatuses.

It is a perspective view which shows the reflection angle variable prism which is the 1st Embodiment of this invention. It is sectional drawing which shows the reflection angle variable prism which is the 1st Embodiment of this invention. It is a disassembled perspective view which shows the reflection angle variable prism which is the 1st Embodiment of this invention. It is sectional drawing which shows the reflection angle variable prism which is the 2nd Embodiment of this invention. It is a figure which shows the direction of the incident light and reflected light to the reflection angle variable prism which is embodiment of this invention in case the refractive index of a prism main body and the refractive index of a filling substance are equivalent. It is a figure which shows the direction of the incident light and reflected light to the reflection angle variable prism which is embodiment of this invention in case the refractive index of a prism main body and the refractive index of a filling substance differ. It is a figure for demonstrating the formula of Fresnel. It is a perspective view which shows components arrangement | positioning of the bending optical system carrying the blurring correction apparatus which is embodiment of this invention. It is a perspective view explaining the 1st imaging | photography form of the mobile phone with a camera provided with the blurring correction apparatus using the reflection angle variable prism which is embodiment of this invention. It is a perspective view explaining the 2nd imaging | photography form of the mobile phone with a camera provided with the blurring correction apparatus using the reflection angle variable prism which is embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Prism main body 12 ... Filling substance 13 ... Reflector 15 ... Drive means

Claims (10)

A prism body, a reflector disposed to face one surface of the prism body so as to be a reflecting surface of the prism body, driving means for tilting the reflector with respect to two orthogonal axes, the prism body, and the prism body A reflecting angle variable prism, comprising: a filling material disposed between the reflecting plate and following the tilt of the reflecting plate. The variable reflection angle prism according to claim 1, wherein the filling material is made of a liquid. The variable reflection angle prism according to claim 1, wherein the filling material is made of gel. The reflection angle variable prism according to any one of claims 1 to 3, further comprising means for preventing leakage of the filling material. The refractive index of the prism body n _1, the refractive index of the filling material when the n _2, the refractive index n ₂ of the filler material, wherein which is a range that satisfies the following equation The reflection angle variable prism according to any one of claims 1 to 4.

When the refractive index of the prism body is n ₁ , the refractive index of the filling material is n ₂ , and the reflectance is a (where 0 <a ≦ 0.1), the refractive index n ₂ of the filling material is as follows: The reflection angle variable prism according to any one of claims 1 to 4, wherein the reflection angle variable prism is in a range that satisfies the following formula.

The reflective angle variable prism according to any one of claims 1 to 4, wherein a refractive index of the filling material is 0.96 to 1.04 times a refractive index of the prism main body. 5. The variable reflection angle prism according to claim 1, wherein a refractive index of the filling material is substantially equal to a refractive index of the prism main body. 9. The reflection angle variable prism according to claim 1, wherein the reflecting plate driving means is a piezoelectric element. A camera-equipped mobile device comprising a camera shake correction mechanism using the variable reflection angle prism according to claim 1.

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