JP5408675B2 - Enlargement attachment - Google Patents

Description

  The present invention relates to an enlargement attachment used by being attached to a camera.

  The spread of mobile phones in recent years is remarkable. One of the factors is the popularity of camera phones.

A mobile phone with a camera is literally a mobile phone with a camera. Such a camera-equipped mobile phone camera incorporates an image pickup means normally formed by a CCD (charge coupled device) in a case of a general mobile phone, and is exposed from a case at a predetermined position of the case. In such a state, a camera lens that guides image light to the imaging unit is provided.
The camera-equipped mobile phone can take a photo by such a configuration.

A camera-equipped mobile phone has a function that enables a user to easily take a picture with a mobile phone that is often carried around. A camera-equipped mobile phone also attaches a photograph taken with the camera-equipped mobile phone to an e-mail realized by the e-mail function provided by the mobile phone, thereby allowing other devices to use the power of other devices. In many cases, it has a function not available in ordinary cameras that can be transmitted without borrowing. These characteristic functions provide new enjoyment that a general camera does not have.
By having such a characteristic function, the mobile phone with a camera has succeeded in stimulating the user's playfulness and has been widely spread to young people who have many opportunities to take pictures.

In view of such a current situation, it can be understood that there is something that further stimulates the playfulness of the user in order to further promote the use of camera-equipped mobile phones.
Considering these points, researches are being conducted to give camera phones with functions that further stimulate the sense of fun of the user.
For example, images that could be captured with a camera-equipped mobile phone were previously only still images, but now it is also possible to capture moving images and frame-by-frame images. Also, a recent camera mobile phone has a function of storing a predetermined image in a memory built in the camera mobile phone and synthesizing it with an image captured by the camera mobile phone.

One measure for stimulating the user's playfulness is to change the image that can be captured by the camera-equipped mobile phone. The simplest is to increase the magnification of the image that can be captured.
If an image with a magnification that can be called a telescope or a microscope can be taken, the mobile phone with a camera becomes a telescope or a microscope that is easy to carry, and its use is expected to be unconventional.
However, it is not so easy to capture a high-magnification image with a camera-equipped mobile phone.

In general, a camera provided in a camera-equipped mobile phone has a viewing angle that can be called a relatively wide angle among lenses included in the camera (generally, 60 ° to 70 °)).
When image light is put into a lens having a wide viewing angle through another objective lens, which is generally a magnifying lens, a part of the viewing angle of the camera lens of the camera-equipped mobile phone, An unguided area is created. Since the image light is not guided in this portion, the final image is displayed in black, so that the final image has a black edge. In other words, appropriate imaging cannot be performed simply by placing an objective lens in front of the camera lens of the camera-equipped mobile phone.
Further, as can be generally said with a microscope, even when a camera-equipped mobile phone camera is used as a microscope, it is necessary to increase the depth of focus in order to easily focus on the object to be imaged. In this case, it is necessary to narrow down the image light from the imaging target using a diaphragm. In this case, since the solid angle of light entering the camera lens of the camera-equipped mobile phone through the objective lens becomes small, especially when the camera-equipped mobile phone camera is used as a microscope, the final image described above is used. The problem that a black region is generated easily occurs.
On the other hand, even if an objective lens is added to a camera equipped with a fixed lens other than a camera-equipped mobile phone and an image is captured, the above phenomenon that only an image having a black portion can be captured sufficiently occurs. sell.
In other words, when an image with a higher magnification is taken by adding another objective lens in front of the lens provided in the existing camera, the image light that has passed through the objective lens is generally supplied to the lens originally provided in the camera. The above-mentioned problem that only an image having a black part (generally with a black border) can be captured by simply guiding it is not limited to a camera-equipped mobile phone but is a general camera problem. It can be said.

  The invention of the present application is an enlargement attachment for enabling a camera such as a camera-equipped mobile phone to take an image at a magnification higher than that which can be originally taken by the camera. It is an object of the present invention to provide an image that does not include the image.

  The inventor of the present application has conducted research on an attachment for enlargement that enables a camera such as a mobile phone with a camera to capture an image at a magnification higher than that the camera can originally capture. The inventors have come up with the following enlargement attachment that can obtain an image that does not contain black parts.

The enlargement attachment according to the present invention is used by being attached to a camera-equipped mobile phone or other camera, and is an enlargement attachment for enlarging an image captured by the camera.
This magnifying attachment includes a main body detachably fixed to the camera, an objective lens attached to the main body, and a focusing lens.
When the main body is attached to the camera, the objective lens and the focusing lens allow the image light to pass through the image light from an object to be imaged. To enlarge, the focusing lens transmits the image light that has passed through the objective lens, so that the image light that has passed through the solid lens has a solid angle substantially equal to or larger than the viewing angle of the camera lens. Each is configured to focus on the pupil of the lens.
This magnifying attachment includes an objective lens for capturing a magnified image, and also includes a focusing lens as described above. The focusing lens allows the image light that has passed through the objective lens to pass therethrough, so that the image light that has passed through the focusing lens is focused on the pupil of the lens at a solid angle substantially equal to or greater than the viewing angle of the camera lens. Therefore, a portion having no image light is not substantially formed on the outer peripheral portion of the camera lens. Therefore, by using this enlargement attachment, it becomes possible to capture a high-magnification image without including a black portion without an image using an existing camera.

The enlargement attachment of the present invention may include a field lens attached to the main body.
When the main body is attached to the camera, the field lens allows the image light that has passed through the objective lens to pass therethrough so that the image light that has passed therethrough enters the entire focusing lens. It is supposed to be. At this time, the focusing lens allows the image light that has passed through the field lens to pass therethrough so that the image light that has passed therethrough has a solid angle substantially equal to or greater than the viewing angle of the lens. Focus on.
The field lens functions so that light that has passed through the objective lens can be efficiently or efficiently led to the focusing lens. That is, when there is no field lens, the diameter of the image light that has passed through the objective lens may be much larger than the diameter of the focusing lens when passing through the focusing lens. In such a case, the image light that passes through the focusing lens and is collected on the camera lens is only part of the image light that has passed through the objective lens. Will be lacking. An enlargement attachment having a field lens can brighten the final image.
A diaphragm may be attached to the main body of the enlargement attachment of the present invention. The diaphragm is configured to squeeze the image light to increase the depth of focus when the main body is attached to the camera. In many cases, such an aperture is actually required when a camera equipped with this enlargement attachment is used as a microscope. The diaphragm in the magnifying attachment of the present invention is not arranged closer to the lens than the field lens when the magnifying attachment is used. However, it can be arranged closer to the camera than the objective lens and closer to the imaging object than the objective lens.
The focusing lens in the magnifying attachment is configured to focus the image light that has passed through the field lens onto a lens provided in the camera with a solid angle equal to or greater than the viewing angle of the lens. That is, when a high-magnification image is captured using the enlargement attachment, there is no portion where the image light is not guided in the viewing angle of the camera lens. As a result, the high-magnification image captured by this enlargement attachment does not include a black portion having no image, such as a black border.

The focusing lens is not particularly limited as long as it is as described above.
The focusing lens, for example, allows the image light that has passed through the objective lens to pass therethrough, so that the image light that has passed therethrough is substantially the same as the viewing angle of the lens within the range of the pupil of the lens included in the camera. You may be comprised so that it may converge with a solid angle. By using such a magnifying attachment having a converging lens, useless image light can be reduced, so that it is relatively easy to obtain a bright image.

The field lens may have any specific configuration as long as it is as described above.
For example, the field lens can pass the image light that has passed through the objective lens so that the image light that has passed through the objective lens becomes parallel light.
If a camera equipped with the magnifying attachment of the present invention is used as a telescope, this field lens is often unnecessary. When the camera with the magnifying attachment of the present invention is used as a microscope, the diameter of the light that has passed through the objective lens increases, but the camera with the magnifying attachment of the present invention is used as a telescope. In this case, since the diameter of the light passing through the objective lens is almost as it is, the image light is hardly wasted without using a field lens.

  Note that the objective lens, the field lens, and the focusing lens in the present invention may be configured by a single lens or a plurality of lenses. The use of a plurality of lenses that are equivalent to or substantially equivalent to a single lens is widely used. Therefore, a single lens may be replaced with a plurality of lenses by applying such a known technique. In the case where the objective lens or the field lens is composed of a plurality of lenses, the stop may be provided between the plurality of lenses constituting the objective lens or between the plurality of lenses constituting the field lens.

The main body of the enlargement attachment of the present invention needs to be detachably fixed to the camera. In this case, it is also possible to provide means that can be detachably fixed to the camera in the main body itself. In addition, the main body can be detachably fixed to a fixture that can be detachably fixed to the camera, and can be fixed to the camera via the fixture.
There are numerous types of cameras. This is especially true for camera phones. In addition, camera-equipped mobile phones tend to be replaced frequently.
Considering these circumstances, the camera (or mobile phone with camera) to which the attachment for enlargement should be attached must be a separate object unless some measure is taken to fix the attachment to the camera in the enlargement attachment. When it is changed, there is a possibility that the enlargement attachment cannot be fixed to the camera. In order to attach the enlargement attachment to various cameras, it is necessary to prepare a separate means for detachably fixing the camera to each camera. When this means is fixed to the main body, In order to attach an enlargement attachment to this camera, it is necessary to replace the entire enlargement attachment. If the latter configuration described above is used, in which the magnifying attachment is fixed to the camera through the fixing tool as described above, the structure for fixing the magnifying attachment and the fixing tool is the same. As long as the enlargement attachment can be attached to a separate camera simply by replacing the fixture, the user's financial burden can be reduced.

The objective lens may be configured to be detachable from the main body.
Alternatively, the main body of the magnifying attachment of the present invention is provided separately in two parts, the two parts of the main body are detachable from each other, and the objective lens is provided in one of the two parts of the main body. The focusing lens may be fixed to the other of the two parts of the main body.
In the case of imaging using an enlargement attachment, if it is desired to change the magnification of the image to be captured, it is necessary to change the objective lens. However, even in such a case, the focusing lens does not need to be changed. As described above, if the main body is separable, the other part of the main body described above is made common, and one part of the main body described above is made plural (a plurality having different objective lenses). )be able to. In this way, it is possible to reduce the cost required when capturing various images using the enlargement attachment. In this case, if there is a diaphragm, it is attached to one part of the main body described above.
The objective lens and the field lens may be configured to be detachable from the main body. In this case, the objective lens and the field lens may be integrated.
Alternatively, the main body of the magnifying attachment of the present invention is provided separately in two parts, the two parts of the main body are detachable from each other, and the objective lens and the field lens are provided in one of the two parts of the main body. Alternatively, the focusing lens may be fixed to the other of the two parts of the main body. If it carries out like this, it will become possible to reduce a cost required when picking up various images using the attachment for expansion like the above-mentioned case.

The enlargement attachment of the present invention may include illumination that can irradiate the imaging target with illumination light when performing imaging.
Illumination is essential for high magnification imaging. With the enlargement attachment provided with such illumination, a high-magnification image can be easily picked up without using other lighting fixtures. This is effective in situations where imaging under the same conditions is always required.
In addition, when capturing a high-magnification image, it is necessary to change the illumination according to the magnitude of the magnification. If the magnifying attachment is equipped with the illumination as described above, it is possible to perform appropriate imaging with its own illumination by making the illumination suitable for imaging with the magnifying attachment. .

The perspective view which shows the open state of the case of the mobile phone with a camera attached to the attachment for mobile phones with a camera by embodiment of this invention. The figure which shows the state which twisted two parts of the case of the mobile phone with a camera shown to Fig.1 (a) by the part of a universal joint. The figure which shows the closed state of the case of the mobile phone with a camera shown to Fig.1 (a). The figure which shows the state which the case of the mobile telephone with a camera shown to Fig.1 (a) closed, and the lid | cover was opened in order to image. The figure which shows each part of the attachment for mobile telephones with a camera by embodiment of this invention. The figure which shows an example of the base of the attachment for mobile telephones with a camera by embodiment of this invention. The figure which shows the expansion part of the attachment for mobile telephones with a camera by embodiment of this invention. The figure which shows the use condition as a microscope of the attachment for mobile telephones with a camera by embodiment of this invention. The figure which shows the use condition as a hand-held type microscope of the attachment for mobile phones with a camera by embodiment of this invention. The figure which shows the behavior of the image light at the time of imaging using the attachment for mobile telephones with a camera by embodiment of this invention. The figure which shows the behavior of the image light at the time of imaging using the attachment for mobile telephones with a camera by embodiment of this invention. The figure which shows the behavior of the image light at the time of imaging using the attachment for mobile phones with a camera by the modification 1 of this invention. The figure which shows the behavior of the image light at the time of imaging using the attachment for mobile phones with a camera by the modification 2 of this invention. The perspective view which shows the lens-barrel in the attachment for mobile telephones with a camera by the modification 3 of this invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
The enlargement attachment in the present embodiment forms part of the following camera-equipped mobile phone attachment 1. The enlargement attachment is used while attached to the camera, but the camera to which the enlargement attachment is attached in this embodiment is a camera-equipped mobile phone 40 (see FIG. 1A). ing.

The camera-equipped mobile phone attachment 1 is used in combination with the camera-equipped mobile phone 40.
As shown in FIG. 1A, the camera-equipped mobile phone 40 in this embodiment includes a case. The case is divided into a portion 40A where the camera is provided and a portion 40B where the camera is not provided, and both are connected by a universal joint. This case can be folded in half at the universal joint and can be opened and closed as required. Further, this case is configured such that one of the two portions can be twisted with respect to the other with the universal joint as an axis.
In this embodiment, the camera-equipped mobile phone 40 has at least a mail function for sending and receiving e-mails in addition to a general telephone function realized by a microphone, a speaker, and a circuit for controlling them. . In order to realize these functions, the camera-equipped mobile phone 40 includes a display 41 and an antenna (not shown), and includes hardware such as a CPU, a ROM, a RAM, and an interface. Since it is common to mobile phones as well as mobile phones, its description is omitted.
The display 41 is provided on the front side of the other case 40B constituting the camera-equipped mobile phone 40 (outside when the camera-equipped mobile phone 40 is closed). As shown in FIG. 1B, one case 40A and the other case 40B are connected so that the other case 40B can rotate around one end side connected to the one case 40A. Even when the mobile phone 40 is closed, the display 41 can be visually recognized from the outside by twisting one side 40A of the case by 180 ° with respect to the other 40B.
The camera-equipped mobile phone 40 also includes a camera. The camera includes an image sensor (not shown) and a camera lens 42.
The imaging element performs imaging using image light guided from the imaging target via the camera lens 42, and in this embodiment is configured by a CCD. The camera lens 42 may be configured by a combination of a plurality of lenses, but in this embodiment, is configured by a single lens. The image picked up by the image sensor of the camera of the camera-equipped mobile phone 40 is a reduced image when the image is taken by the camera-equipped mobile phone 40 alone. Note that the reduced image here refers to an image that is smaller than the image sensor and is reflected on the image sensor.
As shown in FIG. 1D, the camera lens 42 is provided on the back side of one case 40A constituting the camera-equipped mobile phone 40 (outside when the camera-equipped mobile phone 40 is closed). The camera lens 42 is not always exposed, but is exposed as necessary. A camera lens cover 43 is attached to the camera-equipped mobile phone 40 in this embodiment. As shown in FIG. 1C, the camera lens cover 43 covers the camera lens 42 when the camera is not used. It is like that. The camera lens lid 43 is slidable with respect to the case 40A. When the camera is used, the camera lens 42 can be exposed by sliding the camera lens lid 43 in the length direction of the camera-equipped mobile phone 40. It can be done.
In addition to the camera lens 42, a camera illumination 44 is provided that can irradiate the imaging object with illumination light when imaging is performed by the camera.
As such a camera-equipped mobile phone 40, for example, “Mover SO505i” (trademark) which is a mobile phone sold by NTT DoCoMo, Inc. can be used.

The camera-equipped cellular phone attachment 1 used by being attached to the camera-equipped cellular phone 40 is shown in FIGS.
The camera-equipped mobile phone attachment 1 is an enlarged image obtained by combining the camera-equipped mobile phone 40 with the camera-equipped mobile phone 40 and capturing an image captured by an image sensor included in the camera of the camera-equipped mobile phone 40. In this embodiment, the camera-equipped mobile phone 40 is used as a microscope.

As shown in the perspective view of FIG. 2, the camera-equipped cellular phone attachment 1 supports the base 10 that detachably fixes the camera-equipped cellular phone 40, the enlargement unit 20 that enlarges the imaging object, and the base 10. And a stand 30.
The base 10, the enlarged portion 20, and the stand 30 may be integrated, but in this embodiment, the base 10 and the enlarged portion 20, and the base 10 and the stand 30 are configured to be detachable. .
The enlargement unit 20 corresponds to the enlargement attachment in the present invention.

FIG. 2A shows the base 10 to which the above-described camera-equipped mobile phone 40 can be attached and detached.
The base 10 can be fixed to the camera-equipped mobile phone 40 in a closed state, and corresponds to an example of a fixing tool in the present invention.
The base 10 has a shape in which ribs are provided at both ends in the width direction of a plate-like body bent so as to have a substantially L-shaped cross section.
The base 10 is slightly wider than the camera-equipped mobile phone 40.
In the bottom plate 10A, which is the widest portion of the base 10, the camera hole 11 corresponds to the camera illumination 44 at a position corresponding to the camera lens 42 when the camera-equipped mobile phone 40 is attached to the base 10. A light hole 12 is provided at each position.
The camera hole 11 and the light hole 12 are for exposing the camera lens 42 and the camera illumination 44 from the bottom plate 10A when the camera-equipped mobile phone 40 is attached to the base 10. In the present embodiment, a detachable attachment of the enlarged portion 20 to the base 10 is realized by fitting a protruding portion 28 of the enlarged portion 20 described later into the camera hole 11.
The camera hole 11 in this embodiment has a shape like a gear provided with three notches 11b at equal intervals in a substantially circular hole 11a. At substantially the center between the notches 11b, a rectangular parallelepiped locking piece 16 is provided so as to be in contact with the hole 11a.
The light hole 12 is circular.

The diameter of the camera hole 11 is sufficient to secure the field of view of the camera lens 42, but if the field of view of the camera lens 42 can be secured and the light from the camera illumination 44 does not kick, The size and shape of the camera hole 11 can be freely changed. Although the light hole 12 is circular, if the light from the camera illumination 44 is not kicked, the size and shape of the light hole 12 can be freely selected.
Furthermore, the camera hole 11 and the light hole 12 may be a series of holes.

A rectangular parallelepiped member 13 is provided outside the back surface 10B, which is a rectangular plate-like portion continuous with the bottom plate 10A of the base 10, and the rectangular parallelepiped member 13 is provided in the length direction of the bottom plate 10A. A camera screw nut 14 is bored along the direction. The rectangular parallelepiped member 13 is for creating a thickness that can increase the thickness of the back surface 10B to provide the camera screw nut 14.
In the specification of the present application, the term “camera screw nut” means a bolt or nut that is generally called a camera screw, and the term “camera screw bolt” is commonly called a camera screw. It shall mean the bolt of the bolts and nuts. The camera screw is generally a 1/4 inch screw (standard of 1/4 20UNC).

Two elastic pieces 15 for detachably fixing the camera-equipped mobile phone 40 are provided on both sides of the bottom plate 10A of the base 10. The elastic pieces 15 are provided on both sides in the width direction of the bottom plate 10A so that the positions in the length direction of the bottom plate 10A coincide. Although not limited to this, the elastic piece 15 is a thin plate-like body formed of an elastic resin, extends in a direction perpendicular to the bottom plate 10A, and has its tip at the other side elastic piece 15. The shape is bent in the direction of.
Note that at least one elastic piece 15 may be provided on the periphery of the bottom plate 10 </ b> A of the base 10. In order to increase the locking force, a plurality of them can be provided.
By inserting the camera-equipped mobile phone 40 between the bent portion of the elastic piece 15 and the bottom plate 10A so that the surface on which the camera lens 42 is provided faces the bottom plate 10A, the display 41 is attached to the bottom plate 10A. The camera-equipped mobile phone 40 can be attached to the base 10 with the camera lens 42 exposed from the camera hole 11 of the bottom plate 10A while being exposed to the opposite side of the face plate 10A. This state is shown in FIG. Such attachment is detachable.
The base 10 is not limited to the above. Any device may be used as long as it can be fixed to the camera-equipped mobile phone 40 in a state where the camera can be used and can be detachably fixed to the enlargement unit 20. The base 10 may be one that can be fixed to the camera-equipped mobile phone 40 by magnetic force, for example.

Note that the camera-equipped cellular phone attachment 1 of the present embodiment has a plurality of bases 10 having different shapes. This is because the base 10 can be fixed to the mobile phone 40 with a different camera.
FIG. 3 shows an example of a base corresponding to the camera-equipped mobile phone 60 that is not a double-fold type. The base 70 is the same as the base 10 described above in the basic configuration, but the shape of the bottom plate and the elastic piece 75, the position and shape of the camera hole and the light hole, and the like are compatible with the camera-equipped mobile phone 60. It is configured as follows.
The camera-equipped mobile phone attachment 1 of the present embodiment has a plurality of bases having such different shapes, and therefore can be replaced with a corresponding base in accordance with the camera-equipped mobile phone to be used. Compatible with mobile phones.

FIG. 2B shows an enlarged portion 20 of the camera-equipped cellular phone attachment 1 in the present embodiment, and FIG. 4 shows a partial perspective view thereof.
The enlargement unit 20 includes a lens case 23 having a lens barrel 22, an illumination 24 for irradiating predetermined imaging light to an imaging target, an illumination power supply 25, a casing 26 containing these, and a contact portion 27. .

As described above, the casing 26 contains the lens case 23, the illumination 24, and the illumination power supply 25, and is made of resin in this embodiment.
The casing 26 is a cylindrical body that is open at one end and has a substantially rectangular parallelepiped shape.
A power switch 29 of the illumination power source 25 is provided on the side surface of the casing 26, and the lighting state of the illumination power source 25 can be controlled by the user switching the power switch 29.

The lens case 23 has the lens barrel 22 as described above.
In the lens barrel 22, an objective lens 21A, a field lens 21B, and a focusing lens 21C are housed.
Each of the objective lens 21A, the field lens 21B, and the focusing lens 21C is configured by a single lens in this embodiment, but at least one of the objective lens 21A, the field lens 21B, and the focusing lens 21C includes a plurality of lenses. It may be configured by combining lenses. When the objective lens 21A, the field lens 21B, or the converging lens 21C is composed of a plurality of lenses, the plurality of lenses constituting the objective lens 21A, the field lens 21B, or the converging lens 21 may be in close contact with each other. It may be arranged with a gap.
The objective lens 21A enlarges the image light by allowing the image light from the imaging target to pass therethrough. As a result, the camera can take an enlarged image. In this embodiment, the objective lens 21A is a 100 × objective lens.
The field lens 21B has a function of adjusting the image light that has passed through the objective lens 21A so that the image light that has passed through the objective lens 21A enters the entire focusing lens 21C. The field lens 21B in this embodiment has the same diameter as the focusing lens 21C, and the diameter when the image light that has passed through the focusing lens 21C reaches the focusing lens 21C is made equal to the diameter of the focusing lens 21C. Yes. In this embodiment, since the focusing lens 21C has the same diameter as the field lens 21B, the diameter of the image light that has passed through the field lens 21B when reaching the focusing lens 21C is the diameter of the focusing lens 21C. The fact that the field lens 21B is made equal means that the field lens 21B has a function of collimating the image light from the objective lens 21A that has passed therethrough.
The focusing lens 21 </ b> C allows the image light that has passed through the field lens 21 </ b> B to pass through, and focuses the image light that has passed through the pupil of the camera lens 42 with a solid angle that is greater than the viewing angle of the camera lens 42. is there. In this embodiment, the focusing lens 21C has the same diameter as the field lens 21B. In this embodiment, the focusing lens 21 </ b> C focuses the image light that has passed through the focusing lens 21 on the pupil of the camera lens 42 with a solid angle substantially the same as the viewing angle of the camera lens 42. The focusing lens 21 </ b> C may be configured such that the image light that has passed through the focusing lens 21 </ b> C is focused within the range of the pupil of the camera lens 42.
A diaphragm 21 </ b> D is also arranged inside the lens barrel 22. The diaphragm 21D is for narrowing the diameter of the image light, and has a function of increasing the depth of focus when imaging is performed by the camera. The diaphragm 21D in FIG. 4 is drawn so as to be positioned closer to the imaging object than the objective lens 21A, but may be positioned between the objective lens 21A and the field lens 21B. When the objective lens 21A or the field lens 21B is composed of a plurality of lenses, the stop 21D may be positioned between the plurality of lenses constituting the objective lens 21A or the field lens 21B.

The lens case 23 is fixed in the casing 26. The lens case 23 includes the optical axis of the camera lens 42 exposed from the base 10, the objective lens 21A, the field lens 21B, and the focusing lens 21C when the casing 26 is attached to the base 10 by a method described later. One end side of the casing 26 is protruded to the other end side of the casing 26 so as to coincide with the optical axis.
A portion of the lens case 23 that protrudes from the casing 26 is referred to as a protruding portion 28, and three protrusions 23 a are provided on the periphery of the tip portion of the protruding portion 28 at regular intervals. . The protrusion 28 is shaped like an external gear in plan view. The thickness of the protrusion 23 a is substantially equal to the height of the locking piece 16.
The contour shape of the tip portion of the projecting portion 28 is substantially the same as the contour shape of the camera hole 11, and the size thereof is slightly smaller than that of the camera hole 11. Therefore, the tip portion of the protrusion 28 can be inserted into the camera hole 11.
Note that the length of the protrusion 28 to the lower surface of the protrusion 23 a in FIG. 4 is slightly longer than the thickness of the bottom plate 10 </ b> A of the base 10.

  When the enlarged portion 20 is attached to the base 10, the enlarged portion 20 is rotated in the direction A in FIG. To do.

The illumination 24 irradiates predetermined illumination light to the imaging object, and in this embodiment is configured by an LED. This illumination 24 is fixed in the casing 26.
The lighting 24 is controlled to be turned on by a power switch 29 of the illumination power supply 25.
The illumination power source 25 serves as a power source for the illumination 24. In this embodiment, a dry battery is used. In this embodiment, the illumination power supply 25 is fixed in the casing 26 so as to be adjacent to the lens case 23.

In this embodiment, the abutting portion 27 has a cylindrical shape with a cross-sectional land track type, and the outer diameter of the abutting portion 27 is substantially equal to the inner diameter of the opening portion of the casing 26, so It is fitted inside the casing 26 so as to be slidable in the direction of the optical axis, with almost no gap between the circumference and the circumference.
The contact portion 27 is moved in the direction away from the camera-equipped mobile phone 40 in parallel with the optical axis direction to be exposed from the casing 26, and a part thereof (the tip in this embodiment) is imaged (or the object). If it is brought into contact with the surrounding area, the optical distance from the imaging object to the objective lens 21A can be positioned. The abutting portion 27 is configured so that the focus position when the camera lens 42, the objective lens 21A, the field lens 21B, and the focusing lens 21C are combined with the object to be imaged is aligned with the positioning described above. ing.
Therefore, if the contact portion 27 is brought into contact with the imaging object with the contact portion 27 exposed from the casing 26, the imaging object can be imaged in a focused state.

When the camera-equipped mobile phone 40 is used as a handheld microscope, the distal end of the abutting portion 27 is brought into contact with the imaging object as will be described later. .
Further, when the camera-equipped mobile phone 40 is used as a general stand-fixed type microscope, the contact portion 27 is moved upward in parallel with the optical axis direction and stored in the casing 26, so that The contact portion 27 can be prevented from interfering with imaging.

The camera-equipped cellular phone attachment 1 of this embodiment has a plurality of enlarged portions 20. Each of these enlargement units 20 includes a lens case 23 and an illumination 24, but the magnification of the objective lens 21A included in each of the lens cases 23 and the type of illumination are different.
Each of the plurality of enlargement units 20 includes an objective lens 21A having a predetermined magnification and an illumination 24 that can perform appropriate illumination at the time of enlargement imaging performed using the objective lens 21A.
As described above, the magnifying unit 20 in the camera-equipped cellular phone attachment 1 according to this embodiment includes the objective lens 21A and the illumination 24 suitable for imaging using the objective lens 21A. Thus, not only can an enlarged image be taken at an appropriate magnification by simply attaching an appropriate enlargement unit 20 to the base 10, but an illumination 24 having an optimum combination for the objective lens 21A that provides the magnification can be automatically obtained. Selected.

Instead of preparing a plurality of enlargement units 20, the enlargement unit can be replaced with a lens case 23 having an objective lens 21A having a different magnification so that the lens case 23 can be removed from the enlargement unit 20. 20 may be configured. In other words, a plurality of lens cases 23 each having an objective lens 21A having different magnifications may be prepared. Thereby, only by attaching an appropriate lens case 23 to the casing 26, it becomes possible to perform enlarged imaging at an appropriate magnification.
In this case, a plurality of different illuminations 24 are prepared, and each time the lens case 23 is replaced, the illumination 24 is exchanged for the illumination 24 suitable for the objective lens 21A included in the lens case 23. Good. Alternatively, an illumination 24 suitable for performing imaging with the objective lens 21 </ b> A included in the lens case 23 can be fixed to the lens case 23. In this way, by simply attaching an appropriate lens case 23 to the casing 26, not only can an enlarged image be captured at an appropriate magnification, but also an optimal combination of illumination 24 for the objective lens 21A that provides that magnification. Will be obtained.

FIG.2 (c) has shown the stand 30 of the attachment 1 for mobile phones with a camera in this embodiment. This is mainly used when the camera-equipped mobile phone 40 is used as a microscope. On the other hand, when the camera-equipped mobile phone 40 is used as a telescope, the stand 30 is not used.
The stand 30 supports the base 10 and includes an extendable arm 31, a leg base 32, and a camera screw bolt 33.
The pedestal 32 is in contact with the ground or the like and supports the camera-equipped mobile phone attachment 1 as a whole, and has a plate shape in this embodiment.
The telescopic arm 31 has a thin plate-shaped inner cylinder 31A, a thin plate-shaped outer cylinder 31B that encloses the inner cylinder 31A, and an arm screw 31C, which are slidable by rotating the arm screw 31C by a rack system. It is connected up and down.
With the configuration as described above, when the arm screw 31C is rotated in one direction, the telescopic arm 31 is extended, and when the arm screw 31C is rotated in the opposite direction, the telescopic arm 31 is contracted.
In the telescopic arm 31, the end of the inner cylinder 31 </ b> A is fixed at a predetermined position of the leg base 32 so as to be substantially perpendicular to the leg base 32. A camera screw nut (not shown) is drilled at the end of the outer cylinder 31B located on the side opposite to the leg base 32.

  As shown in FIG. 5, the stand 30 and the base 10 are fixed by screwing a camera screw bolt 33 to the camera screw nut 14, and the base 10 is parallel to the vertical direction, that is, the optical axis direction by turning the arm screw 31C. Can be moved to.

  Next, a method of using the camera-equipped mobile phone attachment 1 will be described.

First, in the first method of use, as shown in FIG. 5, the camera-equipped mobile phone 40 is attached to the camera-equipped mobile phone attachment 1 for use. In this case, the camera-equipped mobile phone 40 is used as a microscope.
In this case, the base 10, the magnifying unit 20 (the magnifying unit 20 including the objective lens 21A having a magnification suitable for the imaging object), and the stand 30 are brought into the state shown in FIGS. 2 and 5 by the above-described method. The assembled mobile phone 40 may be fixed to the base 10 in advance.
In this state, the camera lens 42 included in the camera-equipped mobile phone 40 is used, and the imaging object is enlarged and displayed on the display 41, and the camera-equipped mobile phone 40 is used as a microscope.
Specifically, the arm screw 31C is turned in a state where the imaging object is placed on the leg base 32 of the stand 30, thereby adjusting the distance between the enlargement unit 20 and the imaging object and focusing. Further, the power switch 29 of the magnifying unit 20 is operated to turn on the illumination 24, and the illumination 24 provides appropriate illumination to the objective lens 21A.
By doing in this way, the image captured by the image sensor is displayed as an enlarged image on the display 41 due to the presence of the objective lens 21A.
In the above-described case where the camera-equipped mobile phone 40 is used as a microscope, the contact portion 27 is moved upward in parallel with the optical axis direction and housed in the casing 26 so as not to hinder imaging. Like that.

In this way, the camera-equipped mobile phone 40 can be used as a microscope. Imaging itself can be performed by a function that the camera of the camera-equipped mobile phone 40 originally has.
Depending on the function of the camera-equipped mobile phone 40 to be used, the data about the image obtained by imaging is recorded in the internal memory of the camera-equipped mobile phone 40 or output from the camera-equipped mobile phone 40 to the outside. Alternatively, it can be used by transmitting using an electronic mail function provided in the camera-equipped mobile phone 40.
When it becomes unnecessary to use the camera-equipped mobile phone 40 as a microscope, the camera-equipped mobile phone 40 is detached from the camera-equipped mobile phone attachment 1.

Next, a second method of using the camera-equipped cellular phone attachment 1 will be described.
As shown in FIG. 6, the second method of using the camera-equipped cellular phone attachment 1 is to use the base 10 with the camera-equipped cellular phone 40 and the enlarged portion 20 attached by hand. is there. In this way, the camera-equipped mobile phone 40 can be used as a handheld microscope. In this case, the stand 30 is not used.
In this case, the camera-equipped mobile phone 40 is fitted into the base 10 as shown in FIG. At this time, one end in the length direction of the camera-equipped mobile phone 40 is brought into contact with the back surface 10B. In this state, the camera lens 42 of the camera-equipped mobile phone 40 is exposed from the bottom plate 10 </ b> A through the camera hole 11.
Next, the enlarged portion 20 is attached to the base 10 as shown in FIG.
Then, the contact portion 27 is pulled out from the enlargement portion 20, and the tip of the extracted contact portion 27 is brought into contact with the object to be imaged.
The imaging performed in this way is performed in a state where the tip of the contact portion 27 is in contact with the object to be imaged, so that the problem of camera shake hardly occurs. Further, as described above, the position of the tip of the abutting portion 27 extended from the enlarged portion 20 matches the focus position, so that the periphery of the hole at the tip of the abutting portion 27 is set as the imaging object. If they abut, it is possible to automatically focus on the object to be imaged located in the hole.

The behavior of image light when an enlarged image is captured using the above-described camera-equipped cellular phone attachment 1 will be described with reference to FIGS.
FIGS. 7 and 8 are perspective views of the enlarged portion 20 viewed from the side in the case of taking an enlarged image using the camera-equipped cellular phone attachment 1 described above.
FIG. 7 shows a case where an enlarged image with a magnification of 50 times is taken by the camera of the mobile phone with camera 40, and FIG. 8 shows a case where an enlarged image with a magnification of 200 times is taken by the camera of the mobile phone with camera.
In both the case shown in FIG. 7 and the case shown in FIG. 8, the focusing lens 21 </ b> C, the field lens 21 </ b> B, and the field lens 21 </ b> B from the side of the hole for exposing the camera lens 42 opened in the main body 40 </ b> X of the camera-equipped mobile phone 40. The objective lens 21 </ b> A is arranged in a straight line in a state where these optical axes coincide with the optical axis of the camera lens 42. In the case of FIG. 7, a donut-shaped stop 21D having a hole in the center at a position farther from the camera lens 42 than the objective lens 21A is located between the objective lens 21A and the field lens 21B in the case of FIG. A diaphragm 21D is arranged.
When imaging is performed in this state, the light from the imaging target surface S is focused on the pupil 42X of the camera lens 42. 7 and 8, image light from different points on the imaging target surface S is indicated by three types of lines, a dotted line, a broken line, and a one-dot chain line, respectively. 7 and 8, only half of the light toward the pupil 42X (the upper half of FIGS. 7 and 8) is shown.
In the case illustrated in FIG. 7, the image light from the imaging target surface S is narrowed down through the diaphragm 21 </ b> D and then travels toward the objective lens 21 </ b> A. The image light passes through the objective lens 21A, is enlarged, travels toward the field lens 21B, and becomes parallel light toward the focusing lens 21C. Then, the image light is focused by passing through the focusing lens 21 </ b> C and focused on the pupil 42 </ b> X of the camera lens 42. When the image light that has passed through the focusing lens 21 </ b> C falls within the range of the pupil 42 </ b> X, the solid angle with the pupil 42 </ b> X as a vertex is substantially the same as the viewing angle of the camera lens 42.
In the case illustrated in FIG. 8, the image light from the imaging target surface S travels toward the objective lens 21 </ b> A. This image light passes through the objective lens 21A, is enlarged, and is narrowed down through the diaphragm 21D. Then, the image light travels toward the field lens 21B and becomes parallel light toward the converging lens 21C. This image light is focused by passing through the focusing lens 21 </ b> C and focused on the pupil 42 </ b> X of the camera lens 42. When the image light that has passed through the focusing lens 21 </ b> C enters the pupil 42 </ b> X, the solid angle with the pupil 42 </ b> X as a vertex is substantially the same as the viewing angle of the camera lens 42.
In this way, the camera of the camera-equipped mobile phone 40 can obtain a high-magnification image that does not include a black part without an image.

<< Modification 1 >>
Modification 1 of the camera-equipped cellular phone attachment 1 described above will be described with reference to FIG.
The camera-equipped cellular phone attachment in the first modification is basically configured in the same manner as the camera-equipped cellular phone attachment 1 described so far.
The camera-equipped mobile phone attachment in Modification 1 is different from the camera-equipped mobile phone attachment 1 described so far in the objective lens 21A, the field lens 21B, and the camera-cell-attached mobile phone attachment 1 described above. While each of the focusing lenses 21C is composed of a single lens, in the camera-equipped cellular phone attachment in the first modification, the objective lens 21A, the field lens 21B, and the focusing lens 21C each include a plurality of lenses. It is in that it is composed of lenses. However, the objective lens 21A, the field lens 21B, and the focusing lens 21C configured by combining a plurality of lenses are equivalent to the objective lens 21A, the field lens 21B, and the focusing lens 21C configured by a single lens. As shown in FIG. 9, the behavior of the image light when an image is taken using this camera-equipped cellular phone attachment is as described above. 1 is the same as the behavior of image light when an enlarged image is taken.
FIG. 9 shows the behavior of the image light when the objective lens 21A, the field lens 21B, and the focusing lens 21C are composed of a plurality of lenses. In FIG. 9, image light from different points on the imaging target surface S is indicated by six different types of dotted lines and broken lines. In FIG. 9, only half of the light toward the pupil 42X (the upper half of FIG. 9) is illustrated.
FIG. 9A shows that when the enlargement magnification is 25 times, FIG. 9B shows what is shown in FIG. 9B when the enlargement magnification is 100 times. This is when the magnification is 200 times.
In the case of FIG. 9C, no diaphragm is provided.

<< Modification 2 >>
Next, modification 2 of the camera-equipped cellular phone attachment 1 described above will be described with reference to FIG.
The camera-equipped cellular phone attachment according to Modification 2 is basically configured in the same manner as the camera-equipped cellular phone attachment 1 described above.
The camera-equipped mobile phone attachment in Modification 2 is different from the camera-equipped mobile phone attachment 1 described so far in the objective 1A, the field lens 21B, Of the focusing lens 21C, the point where the field lens 21B does not exist, and the objective lens 21A and the focusing lens 21C, each of which is configured by a single lens, are configured by a plurality of lenses as in the first modification. It is in that it is. By using the objective lens 21A in the camera-equipped cellular phone attachment in the second modification, the objective lens 21A is configured to be able to perform imaging at 10 × telephoto by the camera-equipped cellular phone camera.
In this case, the stand 30 of the camera-equipped cellular phone attachment 1 is not used.
The behavior of the image light when an image is captured using this camera-equipped cellular phone attachment is as shown in FIG. The behavior of the image light in this case is basically the same as the behavior of the image light when an enlarged image is captured using the above-described camera-equipped cellular phone attachment 1. The light that has passed through the objective lens 21 </ b> A reaches the focusing lens 21 </ b> C as it is and is focused on the pupil 42 </ b> X of the camera lens 42.
FIG. 10 is a diagram illustrating the behavior of image light when the objective lens 21A and the focusing lens 21C are configured by a plurality of lenses. In FIG. 10, image light from different points on the imaging target surface S is indicated by six different types of dotted lines and broken lines. In FIG. 10, only half of the light toward the pupil 42X (the upper half of FIG. 10) is illustrated.

<< Modification 3 >>
Next, Modification 3 of the camera-equipped cellular phone attachment 1 described above will be described with reference to FIG.
The camera-equipped mobile phone attachment 1 according to Modification 3 is basically configured in the same manner as the camera-equipped mobile phone attachment 1 described above.
The camera-equipped mobile phone attachment in the third modification differs from the camera-equipped mobile phone attachment 1 described above in the camera-equipped mobile phone attachment in the third modification. The point is that it is separated into two parts.
FIG. 11 is a diagram showing the lens barrel 22 in the camera-equipped cellular phone attachment in the third modification. The lens barrel 22 in the camera-equipped cellular phone attachment is separated into two portions 22A and 22B as shown in FIG. These two portions 22A and 22B are also detachable. In this embodiment, the outer periphery on one side and the inner periphery on the other side of the opposing portions of the two portions 22A and 22B are respectively threaded so that the two portions 22A and 22B can be screwed together. By doing so, the two parts 22A and 22B are made detachable.
A focusing lens 21C is disposed on the component 22A that is one of the two portions 22A and 22B, and an objective lens 21A, a field lens 21B, and an aperture 21D are disposed on the component 22B that is the other portion. .
In this embodiment, a plurality of components 22B including a suitable objective lens 21A, a field lens 21B, and a diaphragm 21D are prepared. The user can replace the component 22B based on desired imaging conditions regarding imaging magnification and the like. As long as the light from the field lens 21B is parallel light, the image light that has passed through the focusing lens 21C is guided to the pupil 42X of the camera lens 42 even if the component 22B is replaced.

DESCRIPTION OF SYMBOLS 1 Attachment 10 for mobile phones with a camera 10 Base 10A Bottom plate 10B Back surface 11 Camera hole 11a Hole 11b Notch part 12 Light hole 13 Rectangular member 14 Camera screw nut 15, 75 Elastic piece 16 Locking piece 20 Enlarged part 22 Lens tube 23 Lens case 23a Protrusion 24 Illumination 25 Illumination power supply 26 Casing 27 Abutment portion 28 Protrusion portion 29 Power switch 30 Stand 31 Telescopic arm 32 Leg base 33 Camera screw bolt 40, 60 Mobile phone with camera 41 Display 42 Camera lens 43 Camera lens lid 44 Camera illumination

Claims (9)

Attached to a camera equipped with a lens and used for enlarging an image captured by the camera,
A main body detachably fixed to the camera;
An objective lens attached to the main body, a focusing lens, and a field lens;
The objective lens, the focusing lens, and the field lens, when the body is attached to the camera,
The objective lens is configured to pass the image light from the imaging object to be imaged so as to expand the image light.
The field lens is adjusted so that the image light that has passed through the objective lens passes through the objective lens so that the image light that has passed through the objective lens enters the entire focusing lens.
The converging lens allows the image light that has passed through the field lens to pass therethrough, thereby converging the image light that has passed through the field lens to the pupil of the lens at a solid angle substantially equal to or greater than the viewing angle of the camera lens. So that
Attachment for enlargement, each configured. The focusing lens allows the image light that has passed through the objective lens to pass therethrough, so that the image light that has passed through the focusing lens is within the range of the pupil of the lens included in the camera and is substantially the same as the viewing angle of the lens. Configured to focus with an angle,
The enlargement attachment according to claim 1. The field lens is adapted to make the image light that has passed through it into parallel light,
The enlargement attachment according to claim 1. The main body is detachably fixed to a fixture that can be detachably fixed to the camera, and is fixed to the camera via the fixture.
The enlargement attachment according to any one of claims 1 to 3 . When performing imaging, it is equipped with illumination that can illuminate the imaging object with illumination light.
The enlargement attachment according to any one of claims 1 to 4 . The camera is a camera attached to a camera-equipped mobile phone;
The enlargement attachment according to any one of claims 1 to 5 . The objective lens is configured to be detachable from the main body,
The enlargement attachment according to any one of claims 1 to 6 . The objective lens and the field lens are configured to be detachable from the main body.
The enlargement attachment according to any one of claims 1 to 7 . The objective lens and the field lens are integrated.
The enlargement attachment according to any one of claims 1 to 8 .

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