KR102196791B1 - Image acquisition device with adjustable focal plane - Google Patents

Abstract

The present invention relates to an image acquisition device capable of adjusting a focal plane. More particularly, the image acquisition device comprises: a case portion including a lens mount portion having an inner space formed and provided to orthogonally transmit light to at least one of outer surfaces to enter the inner space; an imaging sensor provided so as to be rotatable about a sensor rotation axis provided in parallel with a lens surface, which is an incident surface of a lens portion coupled to the lens mount portion, in the inner space of the case portion; and a sensor rotation portion which rotates the imaging sensor with respect to the sensor rotation axis to enable a tilting operation according to the Scheimpflug principle. Accordingly, the product can be easily miniaturized, and since there is no loss of the amount of light incident on the inner space, it is possible to improve the product performance and greatly improve the versatility of the product.

Description

Image acquisition device with adjustable focal plane {IMAGE ACQUISITION DEVICE WITH ADJUSTABLE FOCAL PLANE}

The present invention relates to an image acquisition device capable of adjusting a focal plane, and more particularly, adjusting a focal plane capable of rotating the imaging sensor itself to satisfy the Scheimplug effect while the projection plane of light incident through the lens is fixed. This relates to a possible image acquisition device.

In general, when photographing a large surface, the entire object to be photographed does not always fit within the field of focus. In this case, the proximal and/or distal portion(s) of the object may be out of focus. The photographer can expand the area to be focused with an adapter having a tilt mechanism, typically a tilt/shift lens that tilts the imaging lens relative to the camera body. Unfortunately, most existing tilt and shift lenses are used to adjust the angle of the lens to the image capture plane (which can be a film or digital sensor, depending on the type of camera), and to focus the lens. It is equipped with precision instruments that use a precisely adjusted mechanical control for focusing.

FIG. 1 is an exemplary view showing a bellows camera according to the prior art, and FIG. 2 is a schematic diagram for understanding a change in a focal plane in a state in which the lens is tilted in the configuration of FIG. 1.

Some photographers also use a bellows camera 1, as shown in Figs. 1 and 2, to achieve a shooting effect. As an example, such a camera can be used to create an artistic effect such as a soft focus image in which a portion of the image is in sharp focus, but the surrounding area may be out of focus.

More specifically, as shown in FIG. 1, the bellows camera 1 includes a camera body 10 in which a vertical film plane or a sensor plane is embedded, and a film plane or a sensor plane. The bellows cover is combined with the lens unit (not shown in the drawing) and a lens mount (not shown in the drawing) provided in front of the camera body 10 and the lower part of the camera body 10 to form a dark room. 28 is formed, and includes a tilt-only adapter 20 provided so that the lens unit can tilt with respect to the camera body 10.

The tilt-only adapter 20 includes an adapter body 21 coupled to the lower portion of the camera body 10 and a plurality of support poles extending forward of the adapter body 21, as shown in FIG. 24), and a plurality of support poles 24 and arranged in parallel, the first flange 23 having the camera coupling portion 22 coupled to the lens mount, and the first flange 23 to be spaced forward from the first flange 23 The second flange 26 and the first flange 23 and the second flange 26 and the first flange 23 and the upper end are arranged to be tilted at a predetermined angle based on the tip block 25 provided at the tip of the plurality of support poles 24 and coupled with the lens unit. It includes a bellows cover 28 forming a dark room to shield the space between the two flanges 26 from the outside. A tilting dial part 29 for adjusting a tilting angle of the second flange 26 may be provided in the tip block 25 of the tilt-only adapter 20.

As described above, in the case of the conventional bellows camera 1, a tilt-only adapter 20 is used so that the lens unit can be tilted with respect to the camera body 10, while being applied to the existing heavy DSLR camera body 10 To facilitate the guide of the lens unit, a rail (not shown), which is cumbersome, must be used, and the added weight and mechanical complexity have a problem in that the bellows camera 1 is limited to a limited studio.

In order to solve such inconvenience, a number of miniaturized cameras in the form of digital cameras have been recently developed and released, and as a result, many digital cameras can be carried more easily as a pocket instead of a large camera bag. , Has a convenient advantage for spontaneous photographs.

However, the digital camera-type miniaturized camera is also a problem, as shown in Fig. 2, in order to achieve the Scheim plug effect, it is premised that the lens unit must be tilted so that it is not parallel to the film surface or the sensor surface when focusing. As a result, there is a limit to the miniaturization.

이고, 렌즈부가 틸팅된 경우의 이미징 센서(30)의 센서면에 대한 광 투과면적은

로서, 전체적인 광 투과량이 줄어드는 것을 알 수 있다.Meanwhile, when the lens unit is tilted with respect to the film surface or the sensor surface in order to complete the Scheim plug effect, when the tilting angle of the lens unit increases, the amount of light transmitted to the film surface or the sensor surface is relatively reduced. That is, as shown in FIG. 2, the light transmission area of the imaging sensor 30 with respect to the sensor surface when the lens unit is not tilted is

And, when the lens part is tilted, the light transmission area of the imaging sensor 30 with respect to the sensor surface is

As, it can be seen that the total amount of light transmission is reduced.

And, like an example of a conventional bellows camera 1, in order to achieve the Scheim plug effect, when the camera body 10 is fixed and the lens unit is tilted using a tilt adapter 20, variable adjustment of the focal plane For this purpose, there is a problem that a complicated design formula is required for precise design of the lens mount unit on which the lens unit is mounted and the tilt adapter 20 employed therein.

The present invention has been conceived to solve the above technical problem, and an object of the present invention is to provide an image acquisition apparatus capable of adjusting a focal plane capable of realizing a product miniaturization.

Another object of the present invention is to provide an image acquisition apparatus capable of adjusting a focal plane capable of rotating the imaging sensor itself to satisfy the Scheimplug effect while the projection surface through which light is transmitted is fixed.

In addition, another object of the present invention is to provide an image acquisition device capable of adjusting a focal plane provided with a heat dissipation unit capable of effectively dissipating heat from an imaging sensor having significant heat generation.

An embodiment of an image acquisition device capable of adjusting a focal plane according to the present invention includes a case part including a lens mount part having an inner space formed to transmit light orthogonally to at least one of the outer surfaces, and the case part An imaging sensor provided to be rotatable with respect to a sensor rotation axis provided parallel to the lens surface, which is an incident surface of the lens unit coupled to the lens mount unit, in the inner space, and a tilting operation according to the Scheimpflug principle. It includes a sensor rotation unit for rotating the imaging sensor relative to the sensor axis of rotation so as to be possible.

Here, the case portion may shield the inner space in a dark room shape by an outer surface other than an outer surface through which the light is transmitted through the lens mount portion.

In addition, the imaging sensor may further include a sensor mounting block coupled to the lens surface and connected to the rotation shaft.

In addition, the sensor mounting block may include a rotation guide block to which the imaging sensor is coupled, and a rotation drive transmission block coupled to a rear end of the rotation guide block and connected to the sensor rotation unit.

In addition, the sensor rotation unit includes a first rotation gear that is axially rotated in the inner space and a second rotation gear connected to a sensor mounting block to which the imaging sensor is coupled, and provided to be engaged with the first rotation gear. In addition, the imaging sensor may be rotatable in one direction or in the other direction with respect to the sensor rotation axis by engaging rotation of the first rotation gear and the second rotation gear.

In addition, the first rotation gear and the second rotation gear, spur gear engagement, helical gear engagement, rack and pinion gear engagement, bevel gear engagement, metric gear engagement, worm and worm wheel gear engagement, screw gear engagement, internal gear It may be designed and arranged in the inner space to be engaged with any one of meshing, spiral gear meshing, double helical gear meshing, straight bevel gear meshing, spur and bevel gear meshing, and hypoid gear meshing.

In addition, the first rotation gear may be rotationally driven by any one of an electrically driven rotation motor and a manual external force provided by a user.

In addition, the sensor rotation unit may further include a sensor rotation control unit connected to the first rotation gear, coaxially connected to the rotation shaft of the first rotation gear, and exposed to the outside of the case unit.

In addition, the sensor rotation unit may include a rotation guide part having a guide slot for guiding a rotation of the sensor mounting block to which the imaging sensor is coupled with respect to the sensor rotation axis, and the sensor mounting block extending from the sensor mounting block and passing through the guide slot. It may include a rotating guide rod exposed to the outside of the case.

In addition, a heat dissipation part provided in the case part and dissipating heat generated from the imaging sensor to the outside may be further included.

In addition, the heat dissipation part may include a heat dissipation plate part arranged to match a heat dissipation hole formed in a part of the outer surface of the case part, and a heat conduction part connecting the rotation guide block and the heat dissipation plate part to mutually transfer heat among the sensor mounting blocks. .

In addition, the heat conduction unit may be formed of a flexible heat conduction member so that rotation interference of the rotation guide block does not occur.

In addition, the flexible heat-conducting member is made of a material having a predetermined thermal conductivity or higher, and may be provided in one of wires, springs, straps, and braids.

In addition, the heat dissipation plate part is formed in a circular plate shape matching the size of the heat dissipation hole, and is provided radially apart from the center of the circular plate shape and fixed to the heat dissipation hole, and the rotation guide after being separated from the fixed heat dissipation plate The movable heat sink provided to be movable toward the outer surface of the block and the center of the movable heat sink are passed through a screw connection method, and the tip is inserted into the portion provided with the sensor rotation axis of the rotation guide block and fixed in thermal contact, and rotates in place while the It may include a heat conduction shaft to move the moving heat sink.

In addition, the inner surface of the movable heat sink may be in surface contact with the outer surface of the rotation guide block.

In addition, a plurality of heat-conducting bearing balls and the case in which a portion corresponding to any one hemisphere of a spherical shape is seated in a plurality of first bearing seating grooves provided to be arranged concentrically on the outer surface of the rotating guide block in thermal contact It may include a heat sink portion provided with a plurality of second bearing seating grooves arranged to match the heat dissipation holes formed on a part of the outer surface of the negative, and the portions corresponding to the remaining hemispheres of the plurality of heat conductive bearing balls are seated in thermal contact. have.

According to an embodiment of the image acquisition device capable of adjusting the focal plane according to the present invention, various effects as follows can be achieved.

First, since there is no need to tilt the lens unit, a separate adapter for exclusive use of tilting is unnecessary, and thus the product can be miniaturized and portability can be improved.

Second, it is configured to rotate the imaging sensor itself on the inner space of the case unit, thereby minimizing the transmission loss of light, thereby having the effect of greatly increasing the Scheim plug effect.

Third, it has the effect of greatly improving the reliability of the product because it can effectively radiate heat while having a rotatable imaging sensor that generates severe heat.

1 is an exemplary view showing a bellows camera according to the prior art,
FIG. 2 is a schematic diagram for understanding a change in a focal plane as the lens is tilted in the configuration of FIG. 1,
3 is a schematic diagram for explaining a Scheimpflug effect using an image acquisition device capable of adjusting a focal plane according to an embodiment of the present invention
4 is a perspective view showing an embodiment of an image acquisition device capable of adjusting a focal plane according to the present invention,
5 is a perspective view showing the internal configuration of FIG. 4,
6 is a plan view showing the internal configuration of FIG. 4,
7 is a configuration diagram showing another example of the sensor rotation unit in the configuration of FIG. 4,
8 is a configuration diagram showing a first embodiment of the heat dissipation unit in the configuration of FIG. 4,
9 is a front view showing a heat sink as a configuration diagram showing a second embodiment of the heat dissipation unit in the configuration of Fig. 4;
10 is a cross-sectional view showing an operation state of the heat sink unit as a configuration diagram showing the second embodiment of the heat dissipation unit in the configuration of Fig.
11 is a plan view and a cross-sectional view showing a third embodiment of a heat dissipation unit in the configuration of FIG. 4,
12 is a graph showing the relationship between a sensor angle (θ) and a viewing angle (object angle, θ') at different magnifications.

Hereinafter, an embodiment of an image acquisition device capable of adjusting a focal plane according to the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In describing the constituent elements of an embodiment of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

3 is a schematic diagram for explaining a Scheimpflug effect using an image acquisition device capable of adjusting a focal plane according to an embodiment of the present invention.

In general, the Scheimpflug principle means that the extension line of a plane of focus and the extension line of the lens plane are the imaging plane (film plane or sensor plane). In order to achieve a Scheimplug effect and obtain a clear image on the entire projection surface of a photograph, it is derived from the schematic diagram of FIG. 3 by the following rather complicated relationship derivation equation.

That is, the angle θ formed between the sensor surface IP and the lens surface LP of the lens unit and the angle ψ formed between the sensor surface IP and the focusing surface PoF form the following relationship, and through this relationship The Scheimplug effect can be proven.

Here, IP is the image plane, LP is the lens plane, PoF is the plane of focus, G is the rotation axis of the focusing surface, and S is each PoF (i.e. The horizontal cross-sectional distances v'and u'of IP and LP are shown for the cross section (view line leading to the Schimpflug intersection). Accordingly, the relational expression between ψ and S, which is the distance between IP and LP, and the relational expression between θ and S, can be established as follows.

및

이다.In other words,

And

to be.

를 얻을 수 있고,Combining the above two formulas,

You can get

가 되며,

라는 공식을 도출할 수 있고, 이로부터,

또는

라는 공식을 도출할 수 있다.From the Thin-lens equation,

Becomes,

We can derive the formula, from which,

or

You can derive the formula:

Here, the Thin-lens equation for v'can be solved, and the result can be derived from the relational expression for the object as follows by applying the equation for.

이고, 그러므로,

이며,In other words,

And, therefore,

Is,

와

의 관계는, 다음과 같이 시야에서 물체의 배율인 m으로 표현될 수 있다.finally,

Wow

The relationship of can be expressed as m, which is the magnification of the object in the field of view as follows.

이다.In other words,

to be.

In the case of an example of a conventional bellows camera already described in the'Technology behind the Invention' section, in order to achieve the Scheimplug effect, the above-described complex equation is used to design a lens mount unit or a tilt-only adapter to which a commercial lens is combined. It revealed that there is an inconvenience to use. However, in the case of an embodiment of the image acquisition apparatus capable of adjusting the focal plane according to the present invention, as described later, the lens plane is provided to rotate the imaging sensor while the lens plane is fixed, and the rotating imaging sensor is Since it is sufficient if the above relational expression is satisfied, the design has a very simple advantage.

4 is a perspective view showing an embodiment of an image acquisition device capable of adjusting a focal plane according to the present invention, FIG. 5 is a perspective view showing an internal configuration diagram of FIG. 4, and FIG. 6 is a diagram illustrating the internal configuration diagram of FIG. 4 It is a plan view, and FIG. 7 is a configuration diagram illustrating another example of a sensor rotation unit in the configuration of FIG. 4.

An embodiment 100 of an image acquisition apparatus capable of adjusting a focal plane according to the present invention includes a case portion 110 in which an inner space is formed, as shown in FIGS. 4 to 7. In the inner space, an imaging sensor 150 for capturing image data in units of image pixels of an object to be photographed may be provided.

More specifically, the case unit 110 maintains the inner space in a dark room so that light converging on the imaging sensor 150 of the inner space does not leak to the outside, It serves to protect the parts provided in the space.

On the other hand, the case portion 110 is not limited in its shape, but in order to inject light to the imaging sensor 150 provided in the inner space, the lens mount portion 115 is formed in a hole shape on at least one of the outer surfaces. It can be provided.

A lens composed of a plurality of lens combinations to change the magnification of the incident light or change the incident path of the incident light to the lens mount unit 115 and transmit it to the imaging sensor 150 and give focus to the object to be photographed. A part (not shown) may be installed detachably.

Hereinafter, in order to prevent confusion of understanding, the case portion 110 is formed to have an appearance of a cube or a rectangular parallelepiped, and the portion in which the lens mount portion 115 is provided is defined as a'front end' or a'front portion'. , The opposite part is defined as'rear end' or'rear end' and described.

In addition, in an embodiment of the present invention, although the lens unit is not specifically shown in the drawings, the surface formed by the front end of the lens mount unit 115 is an incident surface on which light is incident. LP)', and the front surface of the imaging sensor 150 to be described later is defined and described as a'sensor plane (IP)'.

In the image acquisition device capable of adjusting a focal plane according to an embodiment of the present invention, the imaging sensor 150 includes, as shown in FIGS. 4 to 7, that light is transmitted to the inner space of the case unit 110. It may be provided to be rotatable based on the sensor rotation axis (C) provided in parallel with LP).

This is, in contrast to an example of a conventional bellows camera, while the imaging sensor 150 tilts the lens unit corresponding to the lens surface LP for the light incident on the object to be photographed while it is fixed in the internal space, the present invention In an embodiment of, it means that the sensor surface IP can be tilted to achieve the Scheimpflug effect while the lens surface LP is fixed.

To this end, an embodiment 100 of an image acquisition device capable of adjusting a focal plane according to the present invention rotates the imaging sensor 150 with respect to the sensor rotation axis C to enable a tilting operation according to the Scheim plug principle. It may include a sensor rotation unit 130 to allow.

On the other hand, the case unit 110 serves to shield the inner space in the form of a dark room by an outer surface other than an outer surface through which light is transmitted through the lens mount unit 115.

Such a case unit 110, referring to FIGS. 4 and 5, includes a first case 111 formed of three adjacent surfaces including an outer surface on which the lens mount unit 115 is formed, and a first case 111 ) May include a second case (not shown in the drawing) to form an inner space in the form of a dark room. In this way, the case part 110 is formed by separating the first case 111 and the second case into component parts installed in the inner space (sensor mounting block 120 or sensor rotation part 130 to be described later) Etc.) for easy installation.

In the embodiment 100 of the image acquisition device capable of adjusting the focal plane according to the present invention, when it is assumed that the case unit 110 has the appearance of a cube or a rectangular parallelepiped, the first case 111 is 3 adjacent to each other. It is formed to have three outer surfaces, and the second case is also formed to have three adjacent outer surfaces, so that the first case 111 and the second case are combined with each other to form the overall appearance of the above-described cube or rectangular parallelepiped. have.

The lens mount unit 115 provided on the outer surface of the first case 111 includes a fastening thread 116 and a plurality of locking holes 117 for common coupling with a commercial lens by a screw coupling method, and as described above, A light-transmitting hole 118 that can be incident and transmitted may be formed. In addition, a rotation guide part 113 for guiding the rotation operation of the sensor rotation part 130 may be integrally formed on an inner surface related to the outer surface of the first case 111 on which the lens mount part 115 is formed. .

At least one of the outer surfaces of the second case 110 may be provided with a dial installation hole 114 in which a dial-shaped sensor rotation control unit 140 to be described later is installed for manipulating the sensor rotation unit 130, At least one of the outer surfaces of the second case 110 may be provided with a heat dissipation hole 112 for installing the heat dissipation plate 200 of the heat dissipation unit to be described later. The dial installation hole 114 and the heat dissipation hole 112 will be described in more detail later.

When light related to the object to be photographed is incident into the case unit 110 through a lens unit (not shown) coupled to the lens mount unit 115, the imaging sensor 150 provided inside the case unit 110 is Can be captured to form image data. At this time, the incident area of light passing through the light transmission hole 118 of the lens mount unit 115 is fixed without being changed, but the front surface of the imaging sensor 150 (hereinafter,'sensor surface) is rotated by rotating the imaging sensor 150 It is possible to change the focal plane of light incident on (IP) (referred to as'sensor plane)'). That is, the imaging sensor 150 may be coupled to the sensor mounting block 120 so as to be rotatable by the sensor rotation unit 130 inside the case unit 110.

The sensor mounting block 120 is coupled to the rear end of the rotation guide block 123 to which the imaging sensor 150 is coupled and the rotation guide block 123, as shown in FIGS. 5 and 6, and the sensor rotation part It may include a rotation drive transmission block 121 connected to the 130.

As shown in FIG. 5, the rotation guide block 123 may be axially coupled with respect to the sensor rotation axis C to substantially rotate the imaging sensor 150. In addition, the rotation guide block 123 is formed such that the front surface is opened to transmit light to the imaging sensor 150, and the left rotation limiting part 124 at the left end and the right rotation limiting part 125 at the right end. ) Can be formed stepped. Here, it is preferable that the portion connecting the left rotation limiting part 124 and the right rotation limiting part 125 is formed in an arc shape (see 127) having a part of the circumferential surface having the same radius around the sensor rotation axis (C). Do. Accordingly, the light incident through the light transmission hole 118 of the lens mount unit 115 may be entirely transmitted to the imaging sensor 150 vertically coupled to the inside of the rotation guide block 123 without additional leakage.

Meanwhile, the rotation drive transmission block 121 is disposed in close contact with the rear surface of the rotation guide block 123 to which the imaging sensor 150 is coupled, as shown in FIGS. 5 and 6, and the sensor rotation unit 130 to be described later. ) Serves to transmit the rotational driving force transmitted through the second rotational gear 132 to the rotation guide block 123.

As described above, the sensor mounting block 120 according to the present invention is an imaging sensor according to the Scheim plug principle while the transmission area of light incident through the lens mount unit 115 is fixed, as shown in FIGS. 5 and 6. The imaging sensor 150 rotates by a predetermined angle within the range of the left rotation limiting part 124 and the right rotation limiting part 125 so that the focal plane of 150 is adjusted.

On the other hand, the sensor rotation unit 130, as shown in Figs. 5 and 6, the first rotation gear 131, which is axially rotated in the inner space of the case unit 110, and the imaging sensor 150 is coupled It is connected to the sensor mounting block 120 and may include a second rotation gear 132 provided to be engaged with the first rotation gear 131.

Here, the sensor rotation unit 130 may be provided with an electrically driven rotation motor, not shown, so that the first rotation gear 131 is axially rotated, but as shown in FIGS. 4 to 6, the user It is also possible to drive rotation with a manual external force provided by.

In addition, the image acquisition device 100 capable of adjusting the focal plane according to an embodiment of the present invention, as shown in Figs. 5 and 6, the first rotation gear 131 and the second rotation gear 132 The meshing method of the worm and worm wheel gear is adopted, but is not limited thereto.

For example, the first rotation gear 131 and the second rotation gear 132 are not shown in the drawing, but spur gear engagement, helical gear engagement, rack and pinion gear engagement, bevel gear engagement, metric gear engagement, worm The inner part is to be engaged in any one of an & worm wheel gear engagement, screw gear engagement, internal gear engagement, spiral gear engagement, double helical gear engagement, straight bevel gear engagement, spur and bevel gear engagement, and hypoid gear engagement. It would be natural that it is possible to be designed and arranged in space. Therefore, depending on the type of gear employed as the first rotation gear 131 and the second rotation gear 132, there may be detailed changes in the arrangement design in the inner space of the case part 110, but the sensor rotation part ( If it is possible to rotate the sensor mounting block 120 by 130), it will be considered that any configuration can be employed.

On the other hand, the sensor rotation unit 130 is connected to the first rotation gear 131, as shown in Figure 5, provided to be exposed to the outside through the dial installation hole 114 formed in the case unit 110 A sensor rotation control unit 140 connected coaxially with the rotation shaft of the first rotation gear 131 may be further included. The sensor rotation control unit 140 is formed to provide a user's manual external force rather than an electrically driven rotation motor, and may be provided in the form of a dial connected coaxially with the rotation shaft of the first rotation gear 131.

For example, when a user (or photographer) transmits a manual external force to the first rotation gear 131 by rotating the sensor rotation control unit 140 to one side or the other side, the first rotation gear 131 As the axis rotates toward the side, the rotational driving force is transmitted to the second rotational gear 132, and the second rotational gear 132 is rotated to rotate the sensor mounting block 120 so that the imaging sensor 150 is focused based on the Scheim plug principle. It is to allow the adjustment of the cotton.

7 is a configuration diagram showing another example of a sensor rotation unit in the configuration of FIG. 4.

While one embodiment of the sensor rotation unit 130 referred to in FIGS. 5 and 6 is composed of a complex engagement configuration of the first rotation gear 131 and the second rotation gear 132, the sensor rotation unit referenced by FIG. 7 Another embodiment of (130) proposes a structure in which the sensor mounting block 120 can be rotated more simply.

That is, another embodiment of the sensor rotation unit 130, as shown in FIG. 7, guides the rotation based on the sensor rotation axis C of the sensor mounting block 120 to which the imaging sensor 150 is coupled. A rotation guide part 121 ′ having a guide slot 123 ′ formed thereon, and a rotation guide rod 140 extending from the sensor mounting block 120 and exposed to the outside of the case part 110 through the guide slot 123 ′. ') can be included.

The rotation guide rod 140 ′ is fixedly provided in the support block 113 ′ provided adjacent to the lens mount unit 115, and is inserted into the guide slot 123 ′, so that the sensor mounting block 120 When the sensor mounting block 120 is rotated by a rotation control unit (not shown) for operating the rotation operation, the rotation operation is guided.

FIG. 8 is a configuration diagram showing a first embodiment of a heat dissipation unit in the configuration of FIG. 4, and FIG. 9 is a front view showing a heat sink unit as a configuration diagram showing a second embodiment of the heat dissipation unit in the configuration of FIG. A configuration diagram showing a second embodiment of the heat dissipation unit of the configuration of the sectional view showing an operation state of the heat dissipation unit, and FIG. 11 is a plan view and a cross-sectional view showing a third embodiment of the heat dissipation unit of the configuration of FIG.

An embodiment 100 of an image acquisition device capable of adjusting a focal plane according to the present invention is provided in the case unit 110, as shown in FIGS. 8 to 11, and is generated from the imaging sensor 150. It may further include a heat dissipation unit (not shown) for dissipating heat to the outside.

The imaging sensor 150 is a type of heat-generating electronic device, and since there is a concern that performance degradation may occur due to the generated heat, heat radiation to the outside is required quickly before the overall temperature rise occurs due to heat dissipation into the inner space of the case unit 110 In an embodiment of the present invention, the heat dissipation unit serves to dissipate heat generated from the imaging sensor 150 or heat of the inner space of the case unit 110.

The heat dissipation unit, as a first embodiment, as shown in FIG. 8, a heat dissipation plate part 210 disposed to match the heat dissipation hole 112 formed on a part of the outer surface of the case part 110, and a sensor mounting block 120 ) Of the rotation guide block 123 and the heat dissipation plate unit 210 may include heat conduction units 220a, 220b, and 220c for connecting the heat sink unit 210 to each other to enable heat transfer.

The general heat transfer method by the heat conduction units 220a, 220b, 220c collects heat from a specific heat generation location (hereinafter, referred to as a'first position') and transfers it to a heat radiation location (hereinafter, referred to as'second location'). It is the principle of dissipating heat from the location'. However, when both the first position and the second position are fixed, there is no problem in performing heat dissipation even if the heat conductive parts 220a, 220b, and 220c are made of a material that does not change in shape.

However, in the case of the embodiment 100 of the image acquisition device capable of adjusting the focal plane of the present invention, as a result of the imaging sensor 150 being provided to rotate, the first position that is the heat generation position from the imaging sensor 150 is It is variable and the second position is fixed, and it is preferable that the heat conduction portions 220a, 220b, 220c are made of a material whose shape changes. In addition, the embodiment 100 of the image acquisition apparatus capable of adjusting the focal plane of the present invention is based on the premise that a heat conduction method having the most excellent heat dissipation efficiency among various heat transfer mechanisms is adopted.

Accordingly, as a first embodiment, the heat dissipation unit may be made of a flexible heat conduction member so that the heat conduction units 220a, 220b, and 220c do not cause rotational interference of the rotation guide block 123 as shown in FIG. 8.

Here, the flexible heat-conducting member is made of a material having a predetermined thermal conductivity or higher, as referred to in FIG. 8, but in a woven form (braids, see reference numeral 220a in FIG. 8), and a spring form (spring, in FIG. Reference numeral 220b), straps (refer to 220c of FIG. 8), and wires (not shown) may be provided.

In the case where the heat conduction member is employed in a woven form (refer to 220a in FIG. 8), it is preferable that the woven fabric material is provided in the form of a woven yarn made of copper yarn having high thermal conductivity or a material equivalent to its thermal conductivity, and When the member is adopted in the form of a spring (refer to 220b in FIG. 8), it is preferable to be provided with a spring spring that is easily compressed or relaxed when the rotation guide block 123 of the sensor mounting block 120 is rotated, When the heat conduction member is employed in the form of a strap (refer to 220c of FIG. 8), it is preferable to be provided with a flexible material having high durability against ductility.

Such a heat conduction member effectively dissipates heat generated from the imaging sensor 150 without interfering with the rotation of the rotation guide block 123 among the sensor mounting blocks 120 to which the imaging sensor 150 is coupled. It provides the advantage of radiating heat to the outside of the side.

On the other hand, in the image acquisition device 100 capable of adjusting the focal plane according to an embodiment of the present invention, the second embodiment of the heat dissipation unit, as shown in Figs. 9 and 10, the heat dissipation plate unit 210a, It is formed in the shape of a disk matching the size of the heat dissipation hole 112, provided to be radially spaced apart from the center of the disk shape, and a fixed heat sink 211a fixed to the heat radiation hole 112, and separated from the fixed heat sink 211a. After passing through the center of the movable heat sink 215a and the movable heat sink 215a provided to be movable toward the outer surface of the rotation guide block 123 by a screw coupling method, the front end of the sensor rotation shaft (C) of the rotation guide block 123 It may include a heat conduction shaft 217a that is inserted and fixed in thermal contact to the portion of the shaft hole 122, which is a portion provided, and rotates in place to move the movable heat sink 215a.

More specifically, the heat sink unit 210a, as shown in FIG. 9, is installed in a plurality of fixed heat sinks 211a fixed to the heat sink hole 112 and the heat sink hole 112, but the user (photographer) It may be provided as a movable heat sink 215a that is moved to a position where the rotation guide block 123 is provided separately from the fixed heat sink 211a by an external force provided.

That is, the fixed heat dissipation plate 211a and the movable heat dissipation plate 215a may be provided in the form of a disk centered on the heat conduction axis 217a, as shown in FIG. 9.

Here, in the fixed heat dissipation plate 211a, three fan-shaped plates may be disposed to be spaced apart from each other at intervals of 60 degrees around the heat conduction shaft 217a.

In the fixed heat sink 211a, as shown in FIG. 10, a case portion 110 and a screw hole 213a for screw fixing are formed, respectively, by fastening screws 214a penetrating the screw hole 213a. It may be fixed to the case portion 110.

Meanwhile, the movable heat sink 215a may be disposed to be spaced apart from each other at intervals of 60 degrees in the circumferential direction on the outer circumferential surface of the circular center plate 212a in which three fan-shaped plates are concentric with the heat conduction axis 217a. The fixed heat sink 211a and the movable heat sink 215a serve to radiate heat transferred through the heat conduction shaft 217a to the outside of the case unit 110. Here, the movable heat sink 215a may be provided to enable movement by a user (photographer).

More specifically, the central portion of the movable heat sink 215a passes through the heat conduction shaft 217a and is fastened in a screwing manner by a male thread formed on the outer circumferential surface of the heat conduction shaft 217a. Here, when the heat conduction shaft 217a is rotated in place by the user (photographer), the center plate 212a of the movable heat sink 215a moves in the axial direction of the heat conduction shaft 217a according to the formation direction of the screw thread, and the moving heat sink ( The inner surface of 215a) may be in surface contact with the outer surface of the rotation guide block 123.

That is, when a user (photographer) rotates the heat conduction shaft 217a in place using a predetermined tool such as a driver outside the case unit 110, the movable heat sink 215a may be provided to be movable.

In this way, the above-described heat sink unit configured as the first embodiment of the heat dissipation unit, as shown in FIG. 10, allows the user (photographer) to rotate the heat conduction shaft 217a outside the case unit 110 using a predetermined tool. When the movable heat sink 215a is separated from the fixed heat sink 211a and moves, the inner surface of the movable heat sink 215a is in surface contact with the outer surface of the rotation guide block 123 to conduct heat. At this time, the tip of the heat conduction shaft 217a provided in the center is inserted into the shaft hole 122 formed in the sensor rotation shaft C of the rotation guide block 123 and fixed in thermal contact.

When the movable heat sink 215a is in surface contact with the outer surface of the rotation guide block 123, the heat of the imaging sensor 150 radiated to the rotation guide block 123 is sequentially as shown in FIG. 10(b). Heat is radiated to the outside of the case unit 110 by direct or indirect heat conduction toward the case unit 110 made of a metal material capable of moving to the fixed heat sink 211a through the moving heat sink 215a in contact with the surface Can be.

Meanwhile, the heat dissipation unit may be implemented in the third embodiment as shown in FIG. 11.

In more detail, the heat dissipation part is a third embodiment, as shown in FIG. A plurality of heat-conducting bearing balls (220d) in which a portion corresponding to one of the hemispheres is seated so as to be in thermal contact, and installed in the above-described heat dissipation hole (112), on the remaining hemispheres of the plurality of heat-conducting bearing balls (220d) The corresponding portion may include a heat sink portion 210b provided with a plurality of second bearing seating grooves 213b to be seated in thermal contact.

Therefore, when the rotation guide block 123 to which the imaging sensor 150 is coupled is rotated by the sensor rotation unit 130, the rotation operation is naturally supported by the plurality of heat conduction bearing balls 220d, and a plurality of heat conduction bearings Heat of the imaging sensor 150 transferred to the rotation guide block 123 through the ball 220d may be transferred to the heat sink unit 210b to perform heat radiation.

According to an embodiment 100 of the image acquisition device capable of adjusting the focal plane according to the present invention configured as described above, the imaging sensor 150 is placed inside the case unit 110 while the lens surface LP is fixed. By providing it to be rotatable in space, it is possible to achieve the Scheimplug effect without changing the amount of incident light, as well as to effectively dissipate heat generated from the rotating imaging sensor 150, thus preventing deterioration of product performance. Has an advantage.

In addition, according to the embodiment 100 of the image acquisition device capable of adjusting the focal plane according to the present invention, the Scheimplug effect can be applied to any lens as it is, thereby expanding the versatility of the product.

12 is a graph showing the relationship between the sensor angle (θ) and the viewing angle (object angle, θ') at different magnifications.

Referring to FIG. 12, it can be seen that the Scheimplug principle is that the tilting of the imaging sensor 150 is not linear. That is, the only linear type is when the magnification is 1.

This means that if the lens is tilted 30 degrees when the magnification is 1, the imaging sensor 150 must also be tilted 30 degrees. Further, according to FIG. 12, it means that when the lens is tilted by 20 degrees to obtain a higher magnification, such as when the magnification is 5, the imaging sensor 150 must rotate 60 degrees.

In the current product market, it is impossible to tilt the imaging sensor 150 to more angles, so there is no lens with a high magnification to which the Shime plug principle is applied.

However, according to the image acquisition device capable of adjusting the focal plane according to an embodiment of the present invention, since the imaging sensor 150, not the lens mount unit 115, is tilted, the application of the shime plug principle having a higher magnification is It is possible.

In addition, according to the image acquisition device capable of adjusting the focal plane according to an embodiment of the present invention, since the imaging sensor 150 may be tilted manually or by a motor driving force, a zoom or multiple magnification is not fixed. The use of varifocal lenses may be possible.

That is, any standard lens can be used in the market, the magnification range of the product to which the standard shime plug principle is applied is increased, and the use of a zoom lens and a multifocal lens capable of changing the magnification is provided.

In the above, an embodiment of an image acquisition device capable of adjusting a focal plane according to the present invention has been described in detail with reference to the accompanying drawings. However, the embodiments of the present invention are not necessarily limited by the above-described embodiment, and it is natural that various modifications and equivalent ranges can be implemented by those of ordinary skill in the art to which the present invention belongs. will be. Therefore, it will be said that the true scope of the present invention is determined by the claims to be described later.

100: image acquisition device 110: case portion
111: first case 112: heat dissipation hole
113: rotation guide 114: dial installation hole
115: lens mount part 116: fastening thread
117: locking hole 118: light transmission hole
120: sensor mounting block 121: rotation drive transmission block
122: shaft hole 123: pivoting guide block
124: left rotation limiting part 125: right rotation limiting part
127: arc form 130: sensor rotating part
131: first rotation gear 132: second rotation gear
140: sensor rotation control unit 150: imaging sensor
200: heat sink part C: sensor rotation shaft

Claims (16)

A case portion including a lens mount portion having an inner space and provided to orthogonally transmit light to at least one of the outer surfaces;
An imaging sensor provided so as to be rotatable about a sensor rotation axis provided in parallel with a lens surface, which is an incident surface of the lens unit coupled to the lens mount unit, in the inner space of the case unit; And
A sensor rotation unit for rotating the imaging sensor with respect to the sensor axis of rotation to enable a tilting operation according to the Scheimpflug principle; Including,
A sensor mounting block coupled to the imaging sensor toward the lens surface and connected to the rotation shaft; It further includes,
The sensor mounting block may include a rotation guide block to which the imaging sensor is coupled; Including,
The rotation guide block may include a left rotation limiting portion formed at a left end of the rotation guide block; And a right rotation limiting part formed at a right end of the rotation guide block. Including,
The sensor mounting block is an image acquisition device capable of adjusting a focal plane for rotating the imaging sensor by a predetermined angle within a range of the left rotation limiting unit and the right rotation limiting unit so that the focal plane of the imaging sensor is adjusted. The method according to claim 1,
The case portion is an image acquisition device capable of adjusting a focal plane by shielding the inner space in a darkroom shape by an outer surface other than an outer surface through which the light is transmitted through the lens mount portion. delete The method according to claim 1,
The sensor mounting block,
A rotation drive transmission block coupled to a rear end of the rotation guide block and connected to the sensor rotation unit; Containing, an image acquisition device capable of adjusting the focal plane. The method according to claim 1,
The sensor rotating part,
A first rotating gear axially rotated in the inner space; And
A second rotation gear connected to the sensor mounting block to which the imaging sensor is coupled, and provided to be engaged with the first rotation gear; Including,
The imaging sensor is an image acquisition device capable of adjusting a focal plane, capable of rotating in one direction or in the other direction with respect to the sensor rotation axis by a meshing rotation of the first rotation gear and the second rotation gear. The method of claim 5,
The first rotation gear and the second rotation gear may include spur gear engagement, helical gear engagement, rack and pinion gear engagement, bevel gear engagement, metric gear engagement, worm and worm wheel gear engagement, screw gear engagement, internal gear engagement, Acquisition of an image capable of adjusting the focal plane, which is designed and arranged in the interior space to be meshed and driven by any one of a spiral gear mesh, a double helical gear mesh, a straight bevel gear mesh, a spur and bevel gear mesh, and a hypoid gear mesh. Device. The method of claim 5,
The first rotational gear is rotationally driven by any one of an electrically driven rotational motor and a manual external force provided by a user, an image acquisition device capable of adjusting a focal plane. The method of claim 5,
The sensor rotation unit may include a sensor rotation control unit connected to the first rotation gear, coaxially connected to a rotation axis of the first rotation gear, and exposed to the outside of the case unit; An image acquisition device capable of adjusting the focal plane further comprising a. The method according to claim 1,
The sensor rotating part,
A rotation guide part having a guide slot for guiding rotation of the sensor mounting block to which the imaging sensor is coupled with respect to the sensor rotation axis; And
A rotating guide rod extending from the sensor mounting block and penetrating the guide slot and exposed to the outside of the case portion; Containing, an image acquisition device capable of adjusting the focal plane. The method of claim 4,
A heat dissipation part provided in the case part to radiate heat generated from the imaging sensor to the outside; An image acquisition device capable of adjusting the focal plane further comprising a. The method of claim 10,
The radiating part,
A heat radiating plate part arranged to match the heat dissipation hole formed in a part of the outer surface of the case part; And
A heat conduction unit connecting the rotation guide block and the heat dissipation plate unit among the sensor mounting blocks to allow mutual heat transfer; Containing, an image acquisition device capable of adjusting the focal plane. The method of claim 11,
The heat conduction unit is made of a flexible heat conduction member so that rotation interference of the rotation guide block does not occur. An image acquisition device capable of adjusting a focal plane. The method of claim 12,
The flexible heat-conducting member is made of a material having a predetermined thermal conductivity or higher, and is provided in any one of wires, springs, straps, and braids, and the focal plane can be adjusted. Acquisition device. The method of claim 11,
The heat dissipation plate part is formed in a circular plate shape matching the size of the heat dissipation hole,
A fixed heat sink provided radially spaced apart from the center of the disk shape and fixed to the heat sink hole;
A movable heat sink provided to be movable toward an outer surface of the pivoting guide block after being separated from the fixed heat sink; And
A heat conduction shaft penetrating the center of the movable heat sink in a screw connection manner, the tip of which is inserted and fixed in thermal contact with a portion provided with a sensor rotation shaft of the rotation guide block, and rotates in place to move the movable heat sink; Containing, an image acquisition device capable of adjusting the focal plane. The method of claim 14,
An image acquisition device capable of adjusting a focal plane in which the inner surface of the movable heat sink is in surface contact with the outer surface of the rotation guide block. The method of claim 11,
A plurality of heat-conducting bearing balls in which a portion corresponding to one hemisphere of a spherical shape is seated in a plurality of first bearing seating grooves provided to be concentrically arranged on the outer surface of the rotation guide block in thermal contact; And
A heat dissipation plate part provided with a plurality of second bearing seating grooves disposed to match the heat dissipation holes formed on a part of the outer surface of the case part, and in which a part corresponding to the remaining hemispherical surface of the plurality of heat conduction bearing balls is seated in thermal contact; Containing, an image acquisition device capable of adjusting the focal plane.

Images