WO2006018885A1 - 結像光学系およびこれを搭載したカメラ - Google Patents
結像光学系およびこれを搭載したカメラ Download PDFInfo
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- WO2006018885A1 WO2006018885A1 PCT/JP2004/011920 JP2004011920W WO2006018885A1 WO 2006018885 A1 WO2006018885 A1 WO 2006018885A1 JP 2004011920 W JP2004011920 W JP 2004011920W WO 2006018885 A1 WO2006018885 A1 WO 2006018885A1
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- angle
- angle deflection
- photoelectric conversion
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/04—Catoptric systems, e.g. image erecting and reversing system using prisms only
- G02B17/045—Catoptric systems, e.g. image erecting and reversing system using prisms only having static image erecting or reversing properties only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
Definitions
- the present invention relates to an imaging optical system and a camera equipped with the imaging optical system, and more particularly to an imaging optical system suitable for mounting on a mobile phone and a device having a limited mounting space in the thickness direction. Is.
- the CCD camera optical system is generally a system that obtains imaging performance by appropriately arranging lenses in the direction normal to the CCD light-receiving surface, but this system is recommended for thinning while ensuring high optical performance. There is a limit.
- As an image forming optical system for solving such a problem for example, there is an optical system in which the optical path is expanded in the horizontal direction with respect to the CCD light receiving surface to ensure the degree of freedom of the optical system (for example, (See Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-84200
- the present invention has been made to solve the above-described problems, and an object thereof is to obtain an imaging optical system capable of achieving a reduction in thickness and a camera equipped with the imaging optical system.
- At least two or more right-angle deflecting optical means for bending the optical path at a right angle are provided between the object and the photoelectric conversion element.
- An optical element that forms an image of light from an object on the photoelectric conversion element is disposed between the right-angle deflection optical means or between the right-angle deflection optical means and the photoelectric conversion element side. This makes it possible to reduce the size and thickness of the imaging optical system.
- FIG. 1 is a block diagram showing an imaging optical system according to Embodiment 1 of the present invention.
- FIG. 2 is a block diagram showing another example of the imaging optical system according to Embodiment 1 of the present invention.
- FIG. 3 is an explanatory diagram showing an optical path when the prism and mirror of the imaging optical system according to Embodiment 1 of the present invention are used.
- FIG. 4 is an explanatory diagram of a method for realizing thinning of the imaging optical system according to Embodiment 1 of the present invention.
- FIG. 5 is an explanatory view showing an image formation state due to movement of a lens of the image forming optical system according to Embodiment 1 of the present invention.
- FIG. 6 is an explanatory diagram showing a ray tracing result in a state where the prism folding of the imaging optical system according to the first embodiment of the present invention is linearly developed.
- FIG. 7 is an explanatory diagram showing an example of lens data of the imaging optical system according to Embodiment 1 of the present invention.
- FIG. 8 is an explanatory diagram showing changes in optical specifications caused by lens movement of the imaging optical system according to Embodiment 1 of the present invention.
- FIG. 9 is an explanatory diagram showing numerical values of respective parts of the imaging optical system according to Embodiment 1 of the present invention.
- FIG. 10 is an explanatory diagram showing a method for realizing a variable magnification optical system of an imaging optical system according to Embodiment 2 of the present invention.
- FIG. 11 is a perspective view showing an imaging optical system according to Embodiment 3 of the present invention.
- FIG. 12 is an explanatory diagram showing an optical path of a first right-angle prism of the imaging optical system according to Embodiment 3 of the present invention.
- FIG. 13 is a block diagram showing an imaging optical system according to Embodiment 4 of the present invention.
- FIG. 14 is an explanatory diagram showing prisms with different reflecting surfaces of the imaging optical system according to Embodiment 4 of the present invention.
- FIG. 15 is a block diagram showing an example (No. 1) of focus adjustment of the imaging optical system according to Embodiment 5 of the present invention.
- FIG. 16 shows an example (No. 2) of focus adjustment of the imaging optical system according to Embodiment 5 of the present invention. It is a block diagram.
- FIG. 17 is a configuration diagram showing an example (No. 3) of focus adjustment of the imaging optical system according to Embodiment 5 of the present invention.
- FIG. 18 is a configuration diagram showing an example (No. 4) of focus adjustment of the imaging optical system according to Embodiment 5 of the present invention.
- FIG. 19 is a structural diagram showing an example (No. 5) of focus adjustment of the imaging optical system according to Embodiment 5 of the present invention.
- FIG. 20 is a configuration diagram showing an example (No. 6) of focus adjustment of the imaging optical system according to Embodiment 5 of the present invention.
- FIG. 21 is a structural diagram showing an example (No. 7) of focus adjustment of the image forming optical system according to Embodiment 5 of the present invention.
- FIG. 22 is a structural diagram showing an example (No. 8) of focus adjustment of the imaging optical system according to Embodiment 5 of the present invention.
- FIG. 23 is a structural diagram showing an example (No. 9) of focus adjustment of the imaging optical system according to Embodiment 5 of the present invention.
- FIG. 24 is a block diagram showing an imaging optical system according to Embodiment 6 of the present invention.
- FIG. 25 is an explanatory diagram showing an optical path of a numerical example of the imaging optical system according to the sixth embodiment of the present invention.
- FIG. 26 is an explanatory diagram showing lens data of the imaging optical system according to the sixth embodiment of the present invention.
- FIG. 27 is a configuration diagram when a general optical system of an image forming optical system according to Embodiment 6 of the present invention is used.
- FIG. 28 is a block diagram showing a camera according to Embodiment 7 of the present invention.
- FIG. 29 is a block diagram showing a configuration of a signal processing system of a camera according to Embodiment 8 of the present invention.
- FIG. 30 is an explanatory diagram showing an imaging optical system according to Embodiment 9 of the present invention.
- FIG. 1 is a perspective view showing an imaging optical system according to Embodiment 1 of the present invention.
- the imaging optical system of the present embodiment includes a first right prism 1, a concave lens 2, a convex lens 3, a second right prism 4, and a third right prism 5 in the order in which light from an object passes.
- the light receiving surface 6 is arranged.
- the light receiving surface 6 can obtain the same effect even if it is a force S which is the light receiving surface of a CCD which is a photoelectric conversion element, or a photoelectric conversion element having a similar function, such as C1M0S.
- the first right angle prism 1 which is an optical means, is used.
- the first right-angle prism 1 can develop the optical path in a direction parallel to the light receiving surface 6 of the CCD.
- the image of the object is formed on the light receiving surface 6 of the CCD by the concave lens 2 and the convex lens 3 which are optical elements arranged thereafter.
- the second right-angle prism 4 and the third right-angle prism 5 which are right-angle deflection optical means secure the optical path necessary for image formation and serve to bend the optical path in an appropriate direction.
- the first right-angle prism 1 is used as the right-angle deflection optical means, but a bending effect can be obtained even if a mirror that divides the optical path at a right angle is arranged.
- FIG. 2 is a block diagram of the imaging optical system showing such a configuration.
- Figure 3 shows the results of analyzing the optical path by the ray tracing by a computer when bent by the mirror 7 and when bent by the first right-angle prism 1 composed of an optical material with a refractive index of 1.7.
- the left side of the drawing is a case where the optical path is bent by the first right-angle prism 1, and the vertical dimension of the drawing is K and the horizontal dimension of the drawing is L.
- the right side of the paper is the case where the optical path is bent by the mirror 7, and the vertical dimension of the paper is ⁇ , and the horizontal dimension of the paper is ⁇ .
- the dimension ⁇ in the vertical direction of the drawing of the first right-angle prism 1 is smaller
- the horizontal dimension L of the mirror 7 is also smaller than the dimension N of the mirror 7 in the horizontal direction of the paper 7 in the horizontal direction. That is, it can be seen that the first right-angle prism 1 can be made small with a small space required for bending.
- the refractive index of the first right-angle prism 1 can be appropriately selected according to the design conditions, but the space required for bending depends on the refractive index of the bent portion.
- the dimensions required for bending are calculated according to Snell's law, it can be seen that it is possible to fold in a smaller space if an optical material with a high refractive index is used.
- the optimum prism material condition for thinning is to use a material with a refractive index as high as possible.
- the second right-angle prism 4 and the third right-angle prism 5 are also suitable to be bent with a force prism that can replace the bending effect with a mirror.
- using optical materials with different refractive indexes of the prisms constituting the optical system also has a significant effect on the construction.
- Figure 4 shows that the thinning can be optimized by bending the optical path at a right angle.
- FIG. 4 in order to simplify the explanation, in FIG. 4, the concave lens 2 and the convex lens 3 are omitted, the second right-angle prism 4 is also omitted, and the first right-angle prism 1 and the third right-angle prism 5 are used.
- An example using a right-angle prism will be described. By imposing a constant interval between the two prisms, a state in which concave lens 2, convex lens 3 and second right-angle prism 4 are inserted is simulated.
- FIG. 4 (a) is a diagram showing a case where the CCD is bent at right angles to the normal direction of the light receiving surface 6 of the CCD.
- the optical path is developed in parallel with the light receiving surface 6 of the CCD by the first right-angle prism 1 and the third right-angle prism 5.
- T 1 be the thickness of the imaging optical system at this time.
- the example shown in (b) of FIG. 4 is a case where the optical path after being bent by the prism 8 is inclined downward from the direction perpendicular to the normal direction of the light receiving surface 6 of the CCD. That is, the prism 8 and the prism 9 are not prisms that bend the optical path at a right angle. For this reason, The thickness T2 of the optical system determined by rhythm 8 and prism 9 is larger than T1 in Fig. 4 (a).
- the optical path after being bent by the prism 10 is inclined upward from the direction perpendicular to the normal direction of the light receiving surface 6 of the CCD. That is, also in this case, the prism 10 and the prism 11 are not prisms that bend the optical path at a right angle. For this reason, the thickness T3 of the optical system determined by the prism 10 and the prism 11 is larger than T1 in FIG.
- FIG. 5 is an explanatory diagram of an imaging state caused by the movement of the lens.
- FIG. 1 there is a space between the first right-angle prism 1 and the second right-angle prism 4, and the concave lens 2 and the convex lens 3 are arranged here.
- a similar space is provided between the second right-angle prism 4 and the third right-angle prism 5.
- the space between the second right-angle prism 4 and the third right-angle prism 5 is, as shown in FIG. 5, a convex lens 3 (between the first right-angle prism 1 and the second right-angle prism 4 ( This is ensured assuming that the left side of the paper in Fig. 5 slides and is inserted into this space (the right side of the paper in Fig. 5).
- the second right-angle prism 4 has both an effect of expanding the optical path two-dimensionally and an effect of adjusting the optical path position so that the optical path exists at the position where the lens force S slides.
- the telephoto imaging optical system is located on the right side in FIG.
- a wide-angle imaging optical system is realized by the movement of the convex lens 3.
- the configuration shown in FIG. 1 has a simple lens configuration for explanation, but the number of lenses can be increased or decreased according to the target optical performance. For example, if necessary, add a lens near concave lens 2 and convex lens 3, or connect it in front of first right-angle prism 1. A lens for adjusting the image state may be provided. Similarly, a lens may be provided between the third right-angle prism 5 and the light receiving surface 6 of the CCD. That is, optical elements such as a concave lens 2 and a convex lens 3 may be arranged on the object side from the first right-angle prism 1 or on the light-receiving surface 6 side from the third right-angle prism 5.
- Figure 6 shows the results of ray tracing with the prism bent in a straight line.
- FIG. 6 (a) shows the telephoto state, and (b) shows the wide-angle state.
- a convex lens 12 is added to improve the optical performance.
- a microlens is installed on each pixel on the CCD light receiving surface 6 to improve the light receiving efficiency of the pixels that make up the CCD. It is necessary to enter in the direction close to the normal direction of the light-receiving surface 6 of.
- the present numerical example it can be seen from the result of ray tracing shown in FIG. 6 that the light incident on the light receiving surface 6 of the CCD is incident in a direction close to the normal direction of the light receiving surface 6 of the CCD.
- FIG. 7 is an explanatory diagram showing an example of lens data.
- FIG. 8 is an explanatory diagram showing changes in optical specifications due to lens movement.
- FIG. 9 is an explanatory diagram of the imaging optical system in the present numerical example, where (a) is a front view and (b) is a side view.
- the thickness of the non-zoom imaging optical system is limited to around 1.3 due to the limitations on the angle of incidence of light on the CCD described above. Therefore, it can be seen that the imaging optical system of the present numerical example can realize a thickness and thickness that cannot be realized by a normal optical system.
- At least two or more right-angle deflection optical means that bend an optical path at a right angle between the object and the photoelectric conversion element, and these right-angle deflection optical means Between the right-angle deflection optical means and at least one of the right-angle deflection optical means and the photoelectric conversion element side. Light from the object is applied to the photoelectric conversion element. Since the imaging optical system is provided, the imaging optical system can be reduced in size and thickness.
- the right-angle deflection optical means is composed of at least three surfaces, ie, a light incident surface, an internal reflection surface, and a light output surface, and the space between these surfaces is filled with an optical material. Since it is made up of prisms, there is an effect that it can be made smaller and thinner.
- the traveling direction of light from an object incident in parallel to the optical axis direction of the imaging optical system and the normal direction of the light receiving surface of the photoelectric conversion element are parallel to each other. Since the right angle deflection optical means is arranged, even if the length of the light receiving surface of the photoelectric conversion element in the normal direction is short, the optical path length can be increased, and therefore the thickness of the light receiving surface in the normal direction can be reduced. it can.
- variable magnification optical system is configured by being arranged in the optical path of the system, it is possible to realize a reduction in thickness and also to realize a variable magnification optical system.
- FIG. 10 is an explanatory diagram of a method for realizing a variable magnification optical system of an imaging optical system according to Embodiment 2 of the present invention.
- the first embodiment shows a force S that realizes zooming by sliding the convex lens 3
- the second embodiment shows a configuration that realizes zooming by rotating the lens and the prism integrally.
- a portion surrounded by a broken line in the drawing is a portion that rotates integrally, and rotates around a rotation axis indicated by a one-dot chain line.
- An appropriate method may be selected in accordance with the dimensional condition to which the optical system is applied, as to whether the zooming by the mechanism as in the first embodiment or the zooming by the mechanism as in this embodiment is adopted.
- a part of the optical element disposed in the optical path bent by the right-angle deflection optical means and the right-angle deflection optical means rotate integrally, and are adjacent to each other. Since the variable magnification optical system is configured by being arranged in the optical path of the same imaging optical system, a reduction in thickness and realization of the variable magnification optical system are achieved, and a part of the optical element and the right angle deflection optical means are provided. Since the variable magnification optical system can be realized simply by rotating the lens, the structure can be simplified. [0031] Embodiment 3.
- FIG. 11 is a perspective view of an imaging optical system according to Embodiment 3 of the present invention.
- the imaging optical system of the present embodiment includes a first right-angle prism 13, a concave lens 2, a convex lens 3, and a second right-angle prism 4 having curved surfaces on the light incident surface and light exit surface in the order in which light from the object passes.
- the third right-angle prism 5 and the light receiving surface 6 of the CCD are arranged in this order.
- the same reference numerals as those in the first embodiment are the same.
- a configuration in which a curved surface is provided on the first right-angle prism 1 to obtain a wider field of view is shown.
- This embodiment is the same as the first embodiment in that the convex lens 3 can slide to realize an imaging optical system in two states, telephoto and wide-angle. It is characterized by having curved surfaces on the light entrance and exit surfaces. In order to explain the optical action of this prism, only the first right-angle prism 13 is extracted and the optical path passing through the prism is shown in FIG.
- the parallel light incident on the first right-angle prism 13 is spread by the prism incident surface 14 and becomes divergent light, but is reflected by the reflecting surface 15 inside the prism, and then is emitted from the prism. 16 again returns to parallel light.
- the first right-angle prism 13 is a force that expands the diameter of light without changing the parallelism of light.
- An optical system with this function is called a focal optical system or telescope, and is connected after this optical system. It is known as an optical system that adjusts the focal length of the imaging optical system according to a ratio called magnification.
- magnification M of the afocal system, the incident light beam diameter Di, and the outgoing light beam diameter Do is expressed by the following equation.
- the focal length ft (hereinafter referred to as the combined focal length) of the connected optical system is expressed by the following equation.
- the magnification is 1 or less.
- the combined focal length becomes smaller than the focal length of the optical system after the prism.
- a reduction in focal length means a wide-angle optical system, and an optical element having such an effect is generally called a wide converter.
- a wide converter function can be provided by setting the entrance surface and the exit surface that constitute the movement to curved surfaces with appropriate curvature.
- the imaging optical system can be designed without depending on the optical design of the wide converter, if a wide angle is not required, the specification can be changed by using a right-angle prism without a curved surface as appropriate. Easy to do.
- an optical system that emits parallel light and emits parallel light has the advantage of less deterioration in imaging performance depending on the installation position, so that assembly adjustment is easy, and the accuracy of the mounting mechanism is moderate when attaching and detaching. There are advantages such as being able to be set.
- At least one of the surfaces constituting the right-angle deflection optical means is constituted by a curved surface.
- the light incident surface and the light emission surface are formed by curved surfaces, and the right-angle deflection optical means is used as the imaging optical.
- the right-angle deflection optical means is used as the imaging optical.
- another perpendicular deflection optical means and optical element are installed between this perpendicular deflection optical means and the photoelectric conversion element.
- FIG. 13 shows a configuration in which a third right-angle prism 17 having a different curvature radius in the two orthogonal directions is provided.
- FIG. 14 is an explanatory diagram showing prisms with different reflecting surfaces.
- the curvature radius of the reflecting surface in the right-angle deflection optical means is configured to be different in two orthogonal directions, so that the field curvature and astigmatism are reduced. There is an effect that good imaging performance can be obtained by correcting.
- Embodiment 5 shows a method for realizing focus adjustment.
- FIG. 15 shows a configuration for adjusting the focus by moving only the second right-angle prism 4.
- the optical path length between the concave lens 2 and the convex lens 3 and the light receiving surface 6 of the CCD is changed.
- the light receiving surface 6 of the CCD can be installed at the focus position of the concave lens 2 and the convex lens 3 that have changed as the distance to the object to be photographed has changed.
- the second right-angle prism moves in a direction perpendicular to the paper surface.
- the tolerance for rotation with a certain axial force S and the movement in the direction parallel to the paper surface and perpendicular to the paper surface are very loose. With this, the degradation of imaging performance can be extremely reduced.
- FIG. 16 shows a configuration in which the convex lens 3 and the second right-angle prism 4 move in a body.
- FIG. 17 shows a configuration in which the concave lens 2, the convex lens 3 and the second right-angle prism 4 move in a body.
- FIG. 18 shows a configuration in which the first right-angle prism 1 and the concave lens 2 are moved in a body.
- FIG. 19 shows a configuration in which the first right-angle prism 1, the concave lens 2 and the convex lens 3 move in a body.
- Figure 20 shows the first right-angle prism 1, concave lens 2, convex lens 3 and second right-angle prism 4. It is a configuration that moves with the body.
- the configuration shown in FIG. 17 is a configuration in which the first right-angle prism 1 and the concave lens 2 are separated from each other, because light diverges when separated from the lens. It is necessary to reduce the amount of light.
- the concave lens 2 and the first right-angle prism 1 move away from each other or as a unit, so that the prism can always be placed close to the lens. Therefore, the amount of peripheral light can be secured and the prism can be miniaturized.
- FIG. 15 and FIG. 20 described above is for adjusting the focus by moving the prism, but of course, a configuration similar to the conventional focus adjustment is also possible.
- Fig. 2 1 is shown in Fig. 23.
- FIG. 21 is an explanatory diagram showing focus adjustment of only the convex lens 3.
- FIG. 22 is an explanatory diagram showing focus adjustment of only the concave lens 2.
- FIG. 23 is an explanatory diagram showing focus adjustment by movement of the concave lens 2 and the convex lens 3 integrated.
- the force S called a macro is a function for focusing on an object close to the imaging optical system, which is an extreme example of focus adjustment, and can be realized by increasing the moving distance in each configuration.
- the right-angle deflection optical means alone or a part of the optical element arranged in the optical path and the right-angle deflection optical means move together to adjust the focus. Since this is done, it is possible to achieve focus adjustment with a simple configuration while achieving a thin profile.
- FIG. 24 is a configuration diagram showing the imaging optical system of the present embodiment.
- a first right-angle prism 19, a concave lens 20, a convex lens 21, a second right-angle prism 22, and a light receiving surface 6 are arranged in the order in which light from an object passes. That is, the first right-angle prism 19 and the second right-angle prism 22 are right-angle deflection optical means that bend the optical path at right angles, respectively, and the concave lens 20 and the convex lens 21 are those first lenses. It is an optical element that is provided between the right-angle prism 19 and the second right-angle prism 22, and forms an image of light from the object on the light receiving surface 6 of the CCD, which is a photoelectric conversion element.
- the concave lens 20 and the convex lens 21 can move freely between the prisms, so that continuous zooming is possible.
- FIG. 24 shows the imaging optical system in the wide-angle state and (b) shows the telephoto state. Further, by further widening the distance between the first and second right-angle prisms 19 and 22, a higher zoom magnification can be obtained.
- FIG. 25 is a ray tracing result showing the present embodiment, where (a) shows the imaging optical system in the telephoto state and (b) shows the wide-angle state.
- FIG. 26 is an explanatory diagram of the lens data.
- the first right-angle prism 23 has the function of the wide converter shown in the third embodiment, and can be changed to a right-angle prism composed of a plane according to the request for the angle of view.
- FIG. 27 is an explanatory diagram of an imaging optical system in which a mirror is used as the right-angle deflection optical means and a general optical system is disposed between the mirrors.
- FIG. 27A shows the optical path as a straight line
- FIG. 27B shows an actual configuration in which the optical path is bent at right angles by mirrors 24 and 25.
- a concave lens 26, a convex lens 27, and a concave lens 28 are arranged in order from the object side.
- 29a and 29b indicate bending positions (positions of the mirrors 24 and 25 in FIG. 27B).
- two right-angle deflecting optical means for bending the optical path at a right angle are provided between the object and the photoelectric conversion element, and the object side of these right-angle deflecting optical means is provided on the object side. Since an optical element that forms an image of light from an object on the photoelectric conversion element is provided between the right-angle deflection optical means and at least one of the right-angle deflection optical means and the photoelectric conversion element side, the minimum With the configuration, the imaging optical system can be thinned.
- the optical element disposed between the right-angle deflection optical means moves in the optical axis direction to constitute the variable magnification optical system, the optical element is It is possible to move freely between the directional optical means, and therefore there is an effect that continuous zoom is possible
- FIG. 28 is a configuration diagram showing a mobile phone with a camera function as an example of the camera of the seventh embodiment.
- the mobile phone of the present embodiment is connected to the operation unit housing 101 and the display unit housing 102 with a force S hinge, and the display unit housing 102 is connected to the operation surface of the operation unit housing 101.
- the display surface is configured to be rotatable so that it can be reversed.
- the configuration of any of the imaging optical systems described in the first embodiment and the fifth embodiment is stored.
- a convex lens 3 and a second right-angle prism 4 are stored in the operation unit casing 101
- a first right-angle prism 1, a concave lens 2, and a third lens are stored in the display unit casing 102.
- Right angle prisms 5 are provided.
- the centers of these imaging optical systems are equidistant from the optical path between the first right-angle prism 1 and the second right-angle prism 4 and the optical path between the second right-angle prism 4 and the third right-angle prism 5.
- the straight line is the center of rotation.
- the operation unit casing 101 is provided with an operation button 103.
- the display housing 102 has a main display 104 on one side and a sub-display 105 on the other side.
- the imaging optical system captures the one in the same direction that the operator can see.
- the imaging optical system is configured to be in a telephoto state so that the object can be enlarged.
- the display unit housing 102 is twisted with respect to the operation unit housing 101, the incident surface of the imaging optical system is directed toward the operator (the state shown on the right side in FIG. 28). In this case, the image forming optical system is in a wide-angle state because it is mainly to take a picture of itself and its surroundings while looking at the sub display 105.
- the first right-angle prism 1 and the concave lens 2 installed here are configured so as to correspond to the use state shown above.
- the third right-angle prism 5 is twisted with respect to the convex lens 3 and the second right-angle prism 4. Therefore, in the state shown on the left side of FIG. 28, the concave lens 2 and the convex lens 3 are arranged in the telephoto state close to each other. In FIG. 28, the concave lens 2 and the convex lens 3 are separated in the state shown on the right side of the paper. A state of being arranged in a wide angle state is realized.
- the method of rotating the convex lens 3 and the second right-angle prism 4 does not depend on the structure interlocking with the twist of the casing as described above, and for example, the convex lens 3 and the second right-angle prism 4 are stored. If a projection is attached to the operation unit housing 101 and this is operated by hand or electrically operated, it is possible to use the method described above.
- the method of sliding the convex lens 3 may be a method of providing a projection on the operation unit housing 101 for storing the convex lens 3 and sliding it by hand, or a method of operating it electrically.
- the method of moving the convex lens 3 in the optical axis direction can also be realized by providing a projection on the operation unit casing 101 and moving it by hand or electricity.
- the convex lens 3 and the second right-angle prism 4 are housed in the operation section housing 101, and the first right-angle prism 1, the concave lens 2, and the third lens are housed in the display section housing 102.
- the right-angle prism 5 in which the retracted force is stored is not limited to this, but may be in another retracted state.
- At least two or more are provided between the object and the photoelectric conversion element, and the right-angle deflecting optical means for bending the optical path at a right angle, and these An optical element provided on at least one of the object side of the right-angle deflection block, between the right-angle deflection blocks, and on the photoelectric conversion element side from the right-angle deflection block; and an optical element for mapping light from the object to the photoelectric conversion element;
- These right-angle deflection optical means and optical elements are housed and provided with two housings that are configured to be rotatable. By rotating one of these housings, it is arranged between the right-angle deflection blocks. Since the optical element thus moved moves in the optical axis direction to configure the variable magnification optical system, the variable magnification optical system can be realized with a simple configuration while realizing a thin camera. In addition, there is an effect that continuous zoom is possible.
- At least two or more right-angle deflecting optical means for bending the optical path at a right angle are provided between the object and the photoelectric conversion element, and the object side of these right-angle deflection blocks.
- An optical element provided on at least one of the optical elements that forms an image of light from an object on a photoelectric conversion element; and two housings configured to accommodate the right-angle deflection optical means and the optical element and are configured to be rotatable.
- variable magnification optical system By rotating either one of the housings, a part of the optical element arranged in the optical path bent by the right-angle deflection optical means moves in the direction perpendicular to the optical axis, and the adjacent identical image formation Since the variable magnification optical system is configured by being arranged in the optical path of the optical system, the variable magnification optical system can be realized with a simple configuration while realizing a thin camera.
- At least two or more right-angle deflecting optical means for bending the optical path at a right angle are provided between the object and the photoelectric conversion element, and the object side of these right-angle deflection blocks.
- An optical element provided between at least one of the right-angle deflection blocks and on the photoelectric conversion element side of the right-angle deflection block, and forms an image of light from an object on the photoelectric conversion element, and the right-angle deflection optical means and the optical element.
- an optical element disposed in the optical path bent by the right-angle deflection optical means by rotating one of the two casings.
- a part of the lens and the right-angle deflection optical means rotate together and are arranged in the optical path of the same imaging optical system adjacent to form a variable magnification optical system. While It is possible to realize a variable magnification optical system with a simple configuration. Further, if a part of the optical element and the right-angle deflection optical means are configured to be housed in one casing, there is an effect that a zooming optical system can be easily realized by rotating the casing.
- the zooming optical system is configured so that the housing is rotated so that the wide angle is obtained when the object is an operator and the telephoto lens is telephoto when the object is other than the operator. Since it is configured, for example, an effect that the operability can be improved in a camera such as a mobile phone with a camera function, which is also photographed by the operator himself / herself.
- Embodiment 7 since the camera of Embodiment 7 is applied to a mobile phone, it is possible to realize a thin mobile phone with a camera function, a high image quality, and a configuration with a variable magnification optical system.
- the optical axis of the imaging optical system is set to be perpendicular to the operation surface and display surface. Therefore, with this configuration In this case, the length that can be taken as the optical path length of the imaging optical system is determined by the thickness of the mobile phone.
- a mobile phone with dimensional constraints is obtained by using an imaging optical system in which a plurality of right-angle deflection optical means are used and the optical path is bent at a right angle. Therefore, the optical path length is sufficiently long and the zoom function can be mounted.
- the light-receiving surface 6 can be installed in a direction parallel to the operation surface and display surface of the housing, so the degree of freedom in size is relatively high. Can do.
- the present invention is not limited to this and can be applied to, for example, a digital camera and various camera-embedded devices. .
- a great effect can be obtained by application to a device having a thin casing.
- FIG. 29 is a block diagram showing the configuration of the signal processing system of the camera in the eighth embodiment.
- the configuration of the signal processing system includes an imaging optical system 201, a photoelectric conversion unit 202, an image processing unit 203, It comprises display means 204 and storage means 205.
- the imaging optical system 201 is an optical system having one of the configurations of the first embodiment and the sixth embodiment. That is, the imaging optical system includes a first right-angle prism 1, a concave lens 2, a convex lens 3, a second right-angle prism 4, a third right-angle prism 5, and a light receiving surface 6 of the CCD.
- the photoelectric conversion means 202 is a photoelectric conversion means for acquiring the light received by the CCD as an image.
- the image processing unit 203 is based on the image signal converted by the photoelectric conversion unit 202. And means for performing various image processing. For example, the distortion characteristics of the optical system may differ between the telephoto state and the wide-angle state. In this case, the image processing unit 203 corrects the distortion based on the distortion information of the imaging optical system 201 recorded in advance. , Perform the above process.
- the display unit 204 is a processing unit including a display for displaying the image processed by the image processing unit 203.
- the storage unit 205 is a storage unit for storing information such as distortion data of the imaging optical system 201.
- the distortion information of the imaging optical system 201 is information unique to the optical system
- the distortion data created based on the design result or evaluation result of the imaging optical system 201 is recorded in the storage unit 205.
- the image processing means 203 can appropriately read out the data when it is processed.
- the mobile phone as shown in the embodiment 7 has a communication means for transmitting the image signal subjected to the signal processing, the configuration of the communication processing and the like are publicly known. Therefore, the description here is omitted.
- the signal processing system of the camera is configured by the photoelectric conversion unit, the image processing unit, the display unit, and the storage unit, the object image is displayed.
- the configuration can be realized.
- FIG. 30 is a configuration diagram of the imaging optical system in the ninth embodiment.
- the illustrated configuration shows an imaging optical system that can image an object in the direction opposite to the normal direction of the light receiving surface 6 of the CCD.
- This structure can be realized by simply rotating the direction of the first right angle prism 1 by 180 degrees in the optical system of the first embodiment.
- the first right angle prism 29 in the figure shows this. Since the configuration after the first right-angle prism 29 does not need to be changed, it can be realized very easily. It is also possible to capture an object perpendicular to the direction of the light receiving surface 6 of the CCD by rotating the prism 90 degrees. That is, it is possible to easily realize a configuration that captures an object in the lateral direction.
- the direction of the first right-angle prism 29 can be a direction other than the normal direction of the light-receiving surface 6. It is possible to realize a configuration capable of photographing, and therefore, there is an effect that is not affected by the shape of equipment incorporated as a camera.
- the imaging optical system according to the present invention and the camera equipped with the imaging optical system constitute an optical system that forms an image of light from an object on a photoelectric conversion element, and are mounted on a mobile phone. Suitable for use with cameras.
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PCT/JP2004/011920 WO2006018885A1 (ja) | 2004-08-19 | 2004-08-19 | 結像光学系およびこれを搭載したカメラ |
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CN101645278B (zh) * | 2008-08-08 | 2011-11-30 | 蒂雅克股份有限公司 | 光盘装置及光盘处理系统 |
JP2015201272A (ja) * | 2014-04-04 | 2015-11-12 | 三菱電機株式会社 | 車載用前照灯 |
CN110879454A (zh) * | 2019-12-25 | 2020-03-13 | Oppo广东移动通信有限公司 | 摄像头模组、潜望式摄像头模组、摄像头组件及电子装置 |
CN111308643A (zh) * | 2019-12-25 | 2020-06-19 | Oppo广东移动通信有限公司 | 摄像头模组、潜望式摄像头模组、摄像头组件及电子装置 |
EP3842848A1 (en) * | 2019-12-25 | 2021-06-30 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Camera module, camera assembly, and electronic device |
EP3779550A4 (en) * | 2018-04-25 | 2021-12-08 | Huawei Technologies Co., Ltd. | LENS MODULE AND CAMERA |
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CN101645278B (zh) * | 2008-08-08 | 2011-11-30 | 蒂雅克股份有限公司 | 光盘装置及光盘处理系统 |
JP2015201272A (ja) * | 2014-04-04 | 2015-11-12 | 三菱電機株式会社 | 車載用前照灯 |
EP3779550A4 (en) * | 2018-04-25 | 2021-12-08 | Huawei Technologies Co., Ltd. | LENS MODULE AND CAMERA |
CN110879454A (zh) * | 2019-12-25 | 2020-03-13 | Oppo广东移动通信有限公司 | 摄像头模组、潜望式摄像头模组、摄像头组件及电子装置 |
CN111308643A (zh) * | 2019-12-25 | 2020-06-19 | Oppo广东移动通信有限公司 | 摄像头模组、潜望式摄像头模组、摄像头组件及电子装置 |
EP3842848A1 (en) * | 2019-12-25 | 2021-06-30 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Camera module, camera assembly, and electronic device |
US11693221B2 (en) | 2019-12-25 | 2023-07-04 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Camera module, camera assembly, and electronic device |
CN111308643B (zh) * | 2019-12-25 | 2024-04-12 | Oppo广东移动通信有限公司 | 摄像头模组、潜望式摄像头模组、摄像头组件及电子装置 |
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