JP6848585B2 - Imaging device and lens unit for imaging device - Google Patents

Description

The present invention relates to an imaging device and a lens unit for an imaging device.

In recent years, an increase in skin diseases such as melanoma (melanoma) has become a problem due to aging and ozone layer depletion. For diagnosing such skin diseases, an imaging device called a dermoscopy camera capable of photographing the pigment distribution and color tone inside the skin is utilized.

For example, Patent Document 1 discloses a camera-equipped mobile phone to which a dermoscope can be attached and detached. During dermoscopy photography, the skin disease area is photographed with a camera-equipped mobile phone equipped with a dermoscope, and during normal photography, the skin disease area is photographed with a camera-equipped mobile phone with the dermoscope removed.

Japanese Unexamined Patent Publication No. 2005-192944

However, in the invention disclosed in Patent Document 1, when switching between dermoscopy photography and normal photography, it is necessary to attach / detach the dermoscope. It is also possible to shoot dermoscopy and normal shooting with different cameras, but the camera needs to be replaced. In this way, it was not easy to switch between different shootings.

The present invention has been made by paying attention to such a problem, and an object of the present invention is to provide an image pickup apparatus capable of easily switching between different shootings, and a lens unit for the image pickup apparatus.

To achieve the above object, an imaging apparatus according to the present invention includes a first lens, an imaging apparatus main body having a light source and including a plurality of light emitting elements arranged so as to surround the periphery of said first lens , A lens unit having a second lens and a light guide member provided so as to surround the second lens , and a state in which the lens unit is attached to the image pickup apparatus main body, the light emitting surface of the light source. Is covered by the light incident surface of the light guide member, and the first mounting state in which the first optical axis of the first lens and the second optical axis of the second lens coincide with each other and the light emitting surface The light guide is provided with mounting means configured to be switchable between a second mounting state in which the second lens is released from the cover by the light incident surface and the second lens deviates from the first optical axis. The member is formed by forming the light incident surface into a ring shape corresponding to the arrangement of the plurality of light emitting elements and forming the light emitting surface into a ring shape having a diameter smaller than that of the light incident surface. The illuminance of the light from the light source on the subject located on the optical axis of 1 and located at the focusing distance is higher in the first mounting state than in the second mounting state. It is configured to, characterized and this.
Further, the lens unit for an imaging device according to the present invention is a lens unit for an imaging device having a second lens and a light guide member provided so as to surround the second lens. The first lens unit for an image pickup device is attached to a predetermined image pickup device main body having the lens 1 and a light source including a plurality of light emitting elements arranged so as to surround the first lens. The light emitting surface of the light source is covered with the light incident surface of the light guide member, and the first optical axis of the first lens and the second optical axis of the second lens coincide with each other. When mounted in a second mounting state different from the first mounting state, the light emitting surface is released from the cover by the light incident surface and the second lens is said to be in the state of The light guide member is configured so as to be off the first optical axis, the light incident surface is formed in a ring shape corresponding to the arrangement of the plurality of light emitting elements, and the light emitting surface is formed. By being formed in a ring shape having a diameter smaller than that of the light incident surface, the illuminance of light from the light source on the subject located on the first optical axis and at the focusing distance becomes the first. 2. It is characterized in that it is configured to be higher in the first mounted state than in the mounted state.

According to the present invention, different imaging can be easily switched.

It is a figure of the dermoscopy camera to which this invention is applied, and is the perspective view of the dermoscopy camera at the time of the dermoscopy shooting. It is a figure of the dermoscopy camera to which this invention is applied, and is the perspective view of the dermoscopy camera at the time of normal shooting. Front view of a dermoscopy camera to which the present invention is applied. The exploded cut-out view of the dermoscopy camera cut by the cutting line IV-IV in FIG. A cut-out view of the dermoscopy camera during dermoscopy shooting. A cut-out view of a dermoscopy camera during normal shooting. It is a schematic diagram which showed the state of the illuminance distribution of the light emitted from the LED, (a) is the distribution map on the irradiation surface shown in FIG. The perspective view which showed the other embodiment of the dermoscopy camera to which this invention was applied.

Hereinafter, embodiments of a dermoscopy camera to which the present invention is applied will be described with reference to the drawings. In the specification of the present application, "Dermoscope" and "Dermoscopy" are used according to the proper use of "Microscope: Microscope" and "Microscopy: Inspection by microscope or use of microscope (method)". ) ”Is used to mean a magnifying glass (device) for skin examination and skin examination using the magnifying glass or use (act) of the magnifying glass.

(Overall configuration of dermoscopy camera 1)
FIG. 1 is a view of a dermoscopy camera to which the present invention is applied, and is a perspective view of the dermoscopy camera at the time of dermoscopy shooting. FIG. 2 is a view of a dermoscopy camera to which the present invention is applied, and is a perspective view of the dermoscopy camera during normal shooting. FIG. 3 is a front view of a dermoscopy camera to which the present invention is applied. FIG. 4 is an exploded cut-out view of the dermoscopy camera cut along the cutting line IV-IV in FIG. As shown in FIGS. 1 to 4, the dermoscopy camera 1 is roughly composed of a camera body (imaging device body) 10 and a lens unit 20 rotatably attached to the camera body 10.

In the following description, as shown in FIG. 1, the imaging target side is the front (front, front) of the dermoscopy camera 1, and the opposite side is the rear, and the vertical and horizontal directions when the dermoscopy camera 1 is viewed from the front are defined. The explanation will be given based on the Cartesian coordinate system in which the directions are up, down, left, and right. Further, unless otherwise specified, the attachment of each member may be performed by an appropriate method such as attachment using screws, screws or the like, attachment such as fitting, or the like.

As shown in FIG. 1, the dermoscopy camera 1 has a dermoscopy shooting state (first shooting state) in which the lens unit 20 is arranged in front of the camera body 10 (arranged in the first position) and dermoscopy shooting is possible. As shown in FIG. 2, a normal shooting state (second shooting state) in which normal shooting is possible as an arrangement in which the lens unit 20 is rotated upward to open the front of the camera body 10 (placed in the second position). ) And can be switched to. It should be noted that the normal shooting means shooting by a general camera usage method such as shooting the surface of a skin diseased part.

(About the configuration of the camera body 10)
The camera body 10 has a housing 11, a zoom lens unit 12, an LED substrate 13 on which a plurality of LEDs (Light Emitting Diodes) 13a as a light source are mounted, a light diffusing plate 14, and a circuit. It houses various components such as a wiring board 30 and an image sensor 31. The housing 11 is provided with a shutter button 18 (FIG. 3) on the upper surface and a power button 17 on the right surface.

Further, inside the housing 11, a storage unit that stores the captured image read by the image sensor 31 in response to the operation of the shutter button 18, a control unit that controls each of the above-mentioned parts, and a power supply are supplied to each of the above-mentioned parts. A battery unit for supplying is provided, but these are not shown.

For the camera body 10, a known photographing device used for normal photographing, for example, a configuration of a commercially available digital camera can be adopted. For example, the zoom lens unit 12, the circuit wiring board 30, and the image sensor 31 may be used. , Known parts can be used. The zoom lens unit 12 has a known optical lens. Further, as the image sensor 31, a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor can be used. Further, the camera body 10 is provided with a touch panel type screen (not shown) for displaying the captured image and executing various settings of the dermoscopy camera 1.

The housing 11 is formed with a substrate accommodating portion 11a formed of an annular recess so as to surround the zoom lens portion 12. The LED substrate 13 on which the LED 13a is mounted is housed in the substrate accommodating portion 11a. Further, a light diffusing plate 14 as a light diffusing portion is placed on the housing 11 so as to cover the front of the LED substrate 13.

The LED substrate 13 has an annular shape, and eight LEDs 13a are mounted on the front surface thereof. As shown in FIG. 3, the eight LEDs 13a are arranged concentrically with respect to the center of the LED substrate 13 at equal intervals. As a result, the LED substrate 13 on which the LED 13a is mounted functions as a ring flash that emits light forward from the outer peripheral position of the zoom lens unit 12. The LED 13a is composed of an LED that emits white light.

The light diffusing plate 14 is made of, for example, a translucent synthetic resin, and has minute irregularities formed on its surface. The light diffusing plate 14 passes the light emitted from the LED 13a and is emitted forward as diffused light.

A rotation support portion 19 that rotatably supports the lens unit 20 is formed on the upper portion of the camera body 10. Rotating protrusions (not shown) serving as a rotation axis of the lens unit 20 are formed on the left and right surfaces of the rotation support portion 19, respectively. By pivotally supporting the rotating portion 25 of the lens unit 20 on the rotating protrusion (not shown), the lens unit 20 can rotate about the rotating shaft R.

As shown in FIG. 2, two engaging convex portions 15 projecting forward are formed on the annular edge portion of the housing 11, and magnetic bodies 16 are attached at two locations. .. The engaging convex portion 15 engages with the engaging concave portion 20a formed at the edge portion of the lens unit 20 when the dermoscopy camera 1 is in the dermoscopy photographing state (FIG. 1). As a result, the camera body 10 and the lens unit 20 can be in a predetermined positional relationship. Further, by attracting the magnetic body 16 provided on the camera body 10 and the magnetic body 26 provided on the lens unit 20 to each other, the state in which the lens unit 20 is in contact with the camera body 10 can be maintained.

(About the configuration of the lens unit 20)
The lens unit 20 is a tubular cover body 40 in which the tip of the conical body is cut, and a tubular body that is attached to the tip of the cover body 40 and has the tip of the conical body cut in the same manner as the cover body 40. The tip cover body 41, the conversion lens 21 and the light guide plate 22 attached to the cover body 40, and the polarizing filter 23 and the cover lens 24 attached to the tip cover body 41, as shown in FIG. Have. The lens unit 20 functions as a dermoscope for enlarging the skin disease portion.

The cover body 40 is made of a resin such as a polyvinyl chloride derivative or an acrylic resin. The outer shape of the cover body 40 has a tapered shape toward the front, and the inside thereof is hollow. Further, the hollow portion of the cover body 40 also has a shape in which the diameter is reduced toward the front.

The conversion lens 21 is a double-sided convex lens, and is interposed between the zoom lens portion 12 of the camera body 10 and the skin disease portion to increase the magnification of the captured image. Specifically, a lens capable of magnifying the diseased part of the patient 10 to 30 times in combination with the magnifying magnification of the zoom lens unit 12 is adopted. The conversion lens 21 is attached to the inner peripheral surface of the cover body 40 via a support portion (not shown).

As shown in FIG. 4, the light guide plate 22 is formed on a light guide plate main body 22b that guides incident light, a reflective film 22a formed on the inner peripheral surface of the light guide plate main body 22b, and an outer peripheral surface of the light guide plate main body 22b. It has a reflective film 22c formed. The light guide plate 22 has a hollow shape with a reduced diameter toward the front. The light guide plate 22 is attached to the inner peripheral surface of the cover body 40 in a state where its outer peripheral surface is in close contact with the inner peripheral surface. The light guide plate main body 22b is made of a translucent synthetic resin such as acrylic. The rear end surface of the light guide plate main body 22b forms a light incident surface 22d. The light incident surface 22d is arranged in front of the LED 13a in the dermoscopy imaging state, and is a surface on which the light emitted from the LED 13a is incident. On the other hand, the front end surface of the light guide plate main body 22b forms a light emitting surface 22e. The light emitting surface 22e is a surface on which the light guided by the light guide plate main body 22b is emitted to the outside. The reflective film 22a and the reflective film 22c are metal films such as aluminum, and prevent the light guided from the surface of the light guide plate main body 22b from leaking to the outside. As a result, the light incident from the light incident surface 22d can be emitted from the light emitting surface 22e without weakening the light.

The tip cover body 41 is made of a resin such as a polyvinyl chloride derivative or an acrylic resin. The tip cover body 41 has a tubular body, and a plurality of hooking portions 41a, which are recesses for hooking a finger by the photographer, are formed on the outer peripheral surface thereof. The photographer can attach the tip cover body 41 to the tip of the cover body 40, for example, by screwing the tip cover body 41 into the cover body 40. As described above, the tip cover body 41 and the cover body 40 have a structure in which they can be attached and detached by a known method such as screwing or fitting. An opening 41b for fitting the cover lens 24 is formed at the tip of the tip cover body 41.

The polarizing filter 23 is provided in the hollow portion of the tip cover body 41. When the tip cover body 41 is attached to the cover body 40, the polarizing filter 23 is arranged in front of the light guide plate 22. The polarizing filter 23 polarizes the light emitted from the light emitting surface 22e of the light guide plate 22 when passing through the light emitting surface 22e. Polarized light is reflected by substances under the skin while suppressing diffuse reflection on the skin surface.

The cover lens 24 is fitted in the opening 41b formed at the tip of the tip cover body 41. The cover lens 24 is made of a transparent synthetic resin, allows the light emitted from the polarizing filter 23 to pass forward, and causes the reflected light to enter the dermoscopy camera 1. Further, the cover lens 24 protects the inside of the lens unit 20 from moisture and dust. At the time of dermoscopy photography, the cover lens 24 is brought into contact with the skin diseased portion.

(About the progress of LED light during dermoscopy shooting)
FIG. 5 is a cut-out view of the dermoscopy camera during dermoscopy shooting. The light emitted from the LED 13a passes through the light diffusing plate 14 and is incident on the light guide plate main body 22b from the light incident surface 22d (FIG. 4). As shown by arrows L1 and L2, the light incident on the light guide plate main body 22b is guided inside the light guide plate main body 22b while being reflected by the reflective film 22a and the reflective film 22c. The light guided by this is focused on the center of the lens unit 20 toward the tip. Eventually, the light guided inside the light guide plate main body 22b is emitted from the light emitting surface 22e and passes through the polarizing filter 23, as shown by the arrow L3. The light polarized by the polarizing filter 23 passes through the cover lens 24 and is emitted forward as shown by the arrow L4.

(About the progress of LED light during normal shooting)
FIG. 6 is a cut-out view of the dermoscopy camera during normal shooting. The light emitted from the LED 13a passes through the light diffusing plate 14 and is emitted forward as diffused light as shown by the arrow L5. The LEDs 13a that emit such light are arranged at equal intervals on the circumference provided outside the zoom lens portion 12, and are arranged in substantially the same plane as the zoom lens portion 12.

(About the illuminance distribution of LED light)
Next, the illuminance distribution of the light emitted from the LED 13a of the dermoscopy camera 1 will be described. 7A and 7B are schematic views showing the illuminance distribution of the light emitted from the LED, FIG. 7A is a distribution diagram on the irradiation surface shown in FIG. 5, and FIG. 7B is a distribution diagram on the irradiation surface shown in FIG. Is. Here, the irradiation surface 51 shown in FIG. 5 corresponds to the surface position of the skin diseased portion at the time of dermoscopy imaging. Further, the irradiation surface 52 shown in FIG. 6 corresponds to the surface position of the skin diseased portion at the time of normal photographing. The irradiation surface 52 is located, for example, at a position 1 meter away from the dermoscopy camera 1. In addition, in each figure of FIG. 7, the region where the illuminance is high is filled with a color closer to white.

As described above, at the time of dermoscopy photography, the light emitted from the LED 13a is guided toward the center of the cover body 40 toward the tip end. Therefore, the light emitted from the cover lens 24 becomes a strong light in which the light from the LED 13a is condensed. Further, at the time of dermoscopy photography, the cover lens 24 is in contact with the skin diseased portion. Therefore, as shown in FIG. 7A, an irradiation region 51a in which light is strongly irradiated is formed on the irradiation surface 51 corresponding to the surface of the skin disease portion, and a non-irradiation region 51b in which light is not irradiated is formed on the outside thereof. Will be done. The size of the irradiation region 51a is approximately the same as the size of the cover lens 24 (FIG. 5). In this way, during dermoscopy photography, the skin diseased portion can be irradiated with the strong light collected by the light guide plate 22. Therefore, the substance under the skin can be irradiated with light and reflected, and a dermoscopy image can be taken.

On the other hand, during normal shooting, as shown in FIG. 6, the light from the LEDs 13a provided on the concentric circles at equal intervals is diffused by the light diffusing plate 14 and emitted forward. As a result, the irradiation range of the light reaching the irradiation surface 52 becomes wider than that at the time of dermoscopy photography, but the intensity of the emitted light becomes weaker. For example, during normal imaging, as shown in FIG. 7B, the irradiation surface 52 has an irradiation region 52a having a larger area than the irradiation region 51a but a lower illuminance, and an irradiation region 52a having a larger area than the irradiation region 52a and having an illuminance. A low irradiation region 52b, an irradiation region 52c having a larger area and lower illuminance than the irradiation region 52b, and a non-irradiation region 52d from which light is not irradiated are formed on the outside thereof. For this reason, it is possible to irradiate a wide range of light centering on the skin diseased portion during normal imaging. Further, during normal shooting, it is possible to shoot with illumination having a lower illuminance than during dermoscopy shooting, so that a wide range including the skin disease portion can be normally shot.

(Example of using Dermoscopy camera 1)
When performing dermoscopy photography using the dermoscopy camera 1, the photographer rotates the lens unit 20 and moves the lens unit 20 to the first position where the lens unit 20 is in contact with the camera body 10 as shown in FIG. .. At that time, the engaging convex portion (FIG. 2) formed in the camera body 10 is inserted into the engaging concave portion 20a formed in the lens unit 20, and the magnetic body 16 of the camera body 10 and the magnetic body 26 of the lens unit 20 are inserted. And is adsorbed. As a result, it is possible to maintain the dermoscopy shooting state in which the front of the camera body 10 is covered with the lens unit. Then, the photographer presses the power button 17 to turn on the power, and for example, half-presses the shutter button 18 to cause the LED 13a to emit light. Then, the cover lens 24 is brought into contact with the skin disease portion. As a result, the light polarized by the polarizing filter 23 and emitted from the cover lens 24 reaches under the skin while suppressing diffused reflection on the surface of the skin diseased portion, and is reflected by the substance under the skin. This reflected light is taken into the dermoscopy camera 1 via the cover lens 24 and the polarizing filter 23. The captured light is magnified 10 to 30 times through the conversion lens 21 and the zoom lens unit 12, and is imaged on the image sensor 31 of the camera body 10. When the shutter button 18 of the camera body 10 is fully pressed at an arbitrary timing, the captured image read by the image sensor 31 is stored in the storage unit of the camera body 10. The captured image stored in this way can be used for examination and diagnosis of, for example, melanocytic nevus, malignant melanoma, seborrheic keratosis, basal cell carcinoma, vascular lesion and Bowen's disease.

Subsequently, when performing normal shooting using the dermoscopy camera 1, the photographer rotates the lens unit 20 upward. Then, as shown in FIG. 2, the lens unit 20 is moved from the front of the camera body 10 and arranged at a second position where the front of the camera body 10 is opened. Then, the photographer directs the zoom lens portion 12 toward the skin disease portion at a predetermined distance from the skin disease portion. Subsequently, the photographer causes the LED 13a to emit light by, for example, pressing the shutter button 18 halfway. The light emitted from the LED 13a becomes diffused light and irradiates a wide range centered on the skin diseased part. The irradiated light is reflected on the surface of the skin disease portion, taken into the zoom lens portion 12, and imaged on the image sensor 31 of the camera body 10. When the shutter button 18 of the camera body 10 is fully pressed at an arbitrary timing, the captured image read by the image sensor 31 is stored in the storage unit of the camera body 10.

(About the effect of the embodiment)
As described above, in the dermoscopy camera 1 to which the present invention is applied, dermoscopy shooting can be performed with the front surface of the camera body 10 covered with the lens unit 20, and normal shooting is performed with the front surface of the camera body open. Can be done. Then, switching between dermoscopy photography and normal photography can be realized only by rotating the lens unit 20 rotatably attached to the camera body 10. Thereby, in the dermoscopy camera 1, it is possible to easily switch between the dermoscopy shooting and the normal shooting.

Further, by arranging the LEDs 13a on the outer circumference of the zoom lens portion 12 at equal intervals, it is possible to irradiate a wide range of light centering on the skin disease portion during normal photographing. Further, by installing the light diffusing plate 14 in front of the LED 13a, it is possible to irradiate a wide range of light during normal shooting. As a result, it is possible to take a wide range of images including the surroundings of the skin diseased part at the time of normal shooting.

Further, a light guide plate 22 for guiding and condensing the light emitted from the LED 13a at the time of dermoscopy photography is provided inside the lens unit 20. The light guide plate 22 can emit light from the dermoscopy camera 1 without weakening the light emitted from the LED 13a. This makes it possible to obtain a clear dermoscopy image.

Further, by forming the reflective films 22a and 22c on the outer peripheral surface and the inner peripheral surface of the light guide plate 22, it is possible to prevent the light from leaking to the outside when the light guide plate 22 guides the light. As a result, during dermoscopy photography, strong light can be emitted from the dermoscopy camera 1 without weakening the light that guides the light.

Further, by making the shape of the light guide plate 22 tapered toward the front, the light incident on the light guide plate 22 can be focused toward the tip. As a result, sufficient light required for dermoscopy photography can be emitted from the dermoscopy camera 1.

Further, by providing the light guide plate 22 on the lens unit 20, light irradiation during normal shooting and dermoscopy shooting can be realized by a common LED 13a. As a result, it is not necessary to provide a plurality of types of light sources for different shootings, and the configuration of the dermoscopy camera 1 can be simplified.

Further, in the lens unit 20, the tip cover body 41 is detachable from the cover body 40. At the time of dermoscopy imaging, the cover lens 24 is used in a state of being in contact with the skin disease portion, but when the imaging is completed, the tip cover body 41 to which the cover lens 24 is attached can be removed and cleaned. This makes it possible to facilitate the cleaning work after dermoscopy photography. Further, by preparing a plurality of tip cover bodies 41, it is possible to replace the tip cover bodies 41 to take pictures of other patients, and it is possible to shorten the examination time.

(About other forms)
The present invention is not limited to the above-described embodiment, and various modifications and applications are possible. In the above-described embodiment, a mode for switching between dermoscopy photography and normal photography by rotating the lens unit 20 with respect to the camera body 10 has been described. The movement mode of the lens unit 20 may be not limited to such rotation, but may be, for example, a mode in which the lens unit 20 is slid with respect to the camera body 10. In the case of dermoscopy photography, the front of the zoom lens unit 12 may be arranged so as to be covered with the lens unit 20, and in the case of normal photography, the lens unit 20 may be slid and moved from the front of the zoom lens unit 12.

Further, in the case of applying a gel having a polarizing action to a skin disease portion for dermoscopy photography, the polarizing filter 23 provided on the tip cover body 41 can be omitted. By preparing the tip cover body 41 having the polarizing filter 23 and the tip cover body 41 not having the polarizing filter 23, it is possible to select the shooting correspondence at the time of dermoscopy shooting depending on the situation.

Further, in the above embodiment, the light source is the LED 13a arranged on the circumference, but other light sources may be adopted. For example, a high-intensity light such as a halogen lamp, a semiconductor light emitting element, and a light emitting element such as organic electroluminescence can be used.

Further, although it has been explained that the LED 13a is composed of an LED that emits white light, for example, an ultraviolet light source, a blue light source, or a green light source may be adopted. Further, the light sources having different colors of light may be provided so that the light sources of different colors can emit light independently. In this way, different images can be obtained by irradiating light of different colors to obtain captured images, and by comparing different images and superimposing the images, the skin disease part can be inspected and the images can be superposed. Diagnosis can be facilitated.

Further, in the above embodiment, the light diffusing plate 14 is installed in front of the LED 13a, but the light diffusing plate 14 is omitted by adopting a light source capable of irradiating the irradiation surface (FIG. 6) with light over a wide range during normal shooting. You may. Further, instead of the light diffusing plate 14, a transparent plate that transmits the incident light as it is may be installed.

Further, it was explained that the cover lens 24 is in contact with the skin diseased portion at the time of dermoscopy photography. However, if it is possible to irradiate light with sufficient illuminance, dermoscopy photography can be performed by bringing the cover lens 24 closer to the skin diseased portion. In this case, the cleaning work after the dermoscopy is taken becomes unnecessary, and the examination time can be shortened.

Further, although the conversion lens 21 has been described as one double-sided convex lens, other forms can also be adopted. For example, the conversion lens 21 may be a lens in which two or a plurality of convex lenses are combined, one achromatic lens, or a combination of two or a plurality of achromatic lenses. Further, the conversion lens 21 may be an aberration-free lens or a spherical lens incorporating an aspherical lens. Further, these lenses may include an antireflection film and a color filter.

Further, although the light guide plate 22 as a light guide member that collects the light from the LED 13a toward the tip is installed in the lens unit 20, another known light guide member is provided instead of the light guide plate 22. May be good. For example, an optical fiber that guides light toward the tip may be provided.

Further, the imaging device according to the present invention is not limited to an imaging device that can switch between a dermoscopy shooting state and a normal shooting state, such as the dermoscopy camera 1 described in the above embodiment. Further, the subject is not limited to the skin disease part. For example, a shooting state in which light is irradiated inside a hole formed in a structure or the like to enlarge the inside of the hole irradiated with light (a state in which the lens unit is positioned in front of the camera body). The present invention can also be applied to an imaging device or the like that can switch between a shooting state (a state in which the front of the camera body is opened with the lens unit) for photographing a range including the periphery of the hole from a position away from the hole. it can.

Further, it has been explained that in the above-mentioned dermoscopy camera 1, the camera body 10 is provided with a shutter button 18 and a touch panel type screen (not shown) for executing various settings of the dermoscopy camera 1. However, an operation receiving unit such as a shutter button 18 or a touch panel type screen (not shown) may be provided in an operation unit physically separated from the camera body. The camera body and the operation unit can communicate in both directions using existing communication technology. By operating the operation unit, the photographer can perform various settings of the camera body, shutter operation, and the like.

Further, in the above-mentioned dermoscopy camera 1, the lens unit 20 is rotatably attached to the camera body 10, but the lens unit may be detachably attached to the camera body. FIG. 8 is a perspective view showing another embodiment of the dermoscopy camera to which the present invention is applied. The dermoscopy camera 100 does not have a rotation support portion 19 and a rotation portion 25 (both see FIG. 1) for rotatably supporting the lens unit 120. On the other hand, the dermoscopy camera 100 is formed with a mounting ring 160 having a recess 160a for the photographer to hook a finger when attaching / detaching the lens unit 120 to / from the camera body 110. Other configurations are the same as the configurations of the dermoscopy camera 1 described in the above embodiment. Therefore, in FIG. 8, the same reference numerals are given to the same configurations.

At the time of normal photographing, the skin disease portion is photographed by the camera body 110 from which the lens unit 120 is removed. On the other hand, at the time of dermoscopy photography, the photographer screwes the lens unit 120 into the camera body 110 and attaches the lens unit 120. The lens unit 120 and the camera body 110 are detachable by a known method such as screwing or fitting. Then, a dermoscopy camera 100 to which the lens unit 120 is attached can take a dermoscopy image. By attaching and detaching the lens unit 120 to and from the camera body 110 in this way, it is possible to switch between the normal shooting state and the dermoscopy shooting state. The effects of normal photography and dermoscopy photography are the same as those described above.

Similar to the lens unit 20 of the above embodiment, the lens unit 120 is necessary for dermoscopy photography by guiding the light emitted from the light source (not shown) provided in the camera body 110 with a light guide plate (not shown). Irradiate a lot of light. Therefore, it is not necessary to provide a light source in the lens unit 120, and the configuration of the lens unit 120 can be simplified.

In addition, specific details such as the configuration shown in the above embodiment can be appropriately changed without departing from the spirit of the present invention.

Although some embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and the equivalent scope thereof. The inventions described in the claims originally attached to the application of this application are added below. The additional numbers are as specified in the claims originally attached to the application for this application.

(Appendix 1)
The main body of the imaging device that has a light source,
A lens unit that is movably provided in the main body of the image pickup apparatus and has a light guide member that collects and emits incident light and a conversion lens is provided.
By moving the lens unit between a first position where the light emitted from the light source is incident on the light guide member and a second position where the light emitted from the light source is not incident on the light guide member. , Switch between the first shooting state and the second shooting state,
An imaging device characterized by this.
(Appendix 2)
The lens unit is rotatably attached to the image pickup apparatus main body.
The first position is a position where the lens unit covers the front surface of the image pickup apparatus main body.
The second position is a position where the lens unit rotates from the first position and is separated from the front surface of the image pickup apparatus main body.
The imaging apparatus according to Appendix 1, wherein the image pickup apparatus is characterized by the above.

(Appendix 3)
A plurality of the light sources are provided around the optical lens provided in the image pickup apparatus main body.
The imaging device according to Appendix 1 or 2, characterized in that.

(Appendix 4)
The first shooting state is a dermoscopy shooting state.
The second shooting state is a normal shooting state.
The imaging apparatus according to any one of Supplementary note 1 to 3, wherein the image pickup apparatus is characterized by the above.

(Appendix 5)
The light guide member has a tapered shape and is attached so as to cover the inner peripheral surface of the lens unit. By guiding the incident light toward the tip, the focused light is emitted. ,
The imaging apparatus according to any one of Supplementary Provisions 1 to 4, wherein the image pickup apparatus is characterized by the above.

(Appendix 6)
The image pickup apparatus main body has a light diffusing portion that diffuses the light of the light source.
The imaging apparatus according to any one of Supplementary Provisions 1 to 5, wherein the image pickup apparatus is characterized by the above.

(Appendix 7)
It has an operation reception unit that accepts operations, and further includes an operation unit that sends an instruction to the image pickup apparatus main body based on the received operation.
The operation unit is physically separated from the image pickup apparatus main body.
The imaging apparatus according to any one of Supplementary Provisions 1 to 6, wherein the image pickup apparatus is characterized by the above.

(Appendix 8)
A lens unit for an imaging device that can be attached to and detached from the main body of an imaging device that has a light source.
A light guide member that collects and emits incident light and a conversion lens are provided.
When attached to the main body of the imaging device, the light emitted from the light source is incident on the light guide member, and the light required for photographing through the conversion lens is directed toward the subject.
A lens unit for an imaging device.

1,100 ... Dermos copy camera, 10,110 ... Camera body, 11 ... Housing, 11a ... Housing, 12 ... Zoom lens, 13 ... LED board, 13a ... LED, 14 ... Light Diffusing plate, 15 ... engaging convex part, 16,26 ... magnetic material, 17 ... power button, 18 ... shutter button, 19 ... rotating support part, 20,120 ... lens unit, 20a ... Engagement recess, 21 ... conversion lens, 22 ... light guide plate, 22a, 22c ... reflective film, 22b ... light guide plate body, 22d ... light incident surface, 22e ... light emitting surface, 23 ... polarizing filter , 24 ... Cover lens, 25 ... Rotating part, 30 ... Circuit wiring board, 31 ... Imaging element, 40 ... Cover body, 41 ... Tip cover body, 41a ... Hooking part, 41b ... Opening, 51, 52 ... Irradiated surface, 51a, 52a, 52b, 52c ... Irradiated area, 51b, 52d ... Non-irradiated area

Claims (6)

An image pickup apparatus main body having a first lens and a light source including a plurality of light emitting elements arranged so as to surround the first lens.
A lens unit having a second lens and a light guide member provided so as to surround the second lens.
The state in which the lens unit is attached to the image pickup apparatus main body is such that the light emitting surface of the light source is covered with the light incident surface of the light guide member, and the first optical axis of the first lens and the second lens of the second lens. Between the first mounting state in which the two optical axes coincide with each other and the second mounting state in which the light emitting surface is released from the cover by the light incident surface and the second lens is disengaged from the first optical axis. With the mounting means configured to be switchable,
With
The light guide member is formed by forming the light incident surface in a ring shape corresponding to the arrangement of the plurality of light emitting elements and forming the light emitting surface in a ring shape having a diameter smaller than that of the light incident surface. When the illuminance of the light from the light source on the subject located on the first optical axis and at the focusing distance is in the first mounting state than in the second mounting state. Is configured to be high,
An imaging device characterized by this. In the light guide member, the light emitting surface is inclined with respect to the light incident surface.
The imaging device according to claim 1. In the light guide member, the light emitting surface is inclined in a direction toward the second optical axis side.
The imaging device according to claim 2 , wherein the image pickup apparatus is characterized by the above. The light guide member is formed in a hollow shape and is formed in a shape that tapers from the light incident surface side toward the light emitting surface side.
The imaging device according to any one of claims 1 to 3, wherein the image pickup apparatus is characterized by the above. The second lens is formed so that the diameter of the second lens is smaller than the diameter of the light incident surface and larger than the diameter of the light emitting surface.
The imaging apparatus according to any one of claims 1 to 4. A lens unit for an image pickup apparatus, comprising a second lens and a light guide member provided so as to surround the periphery of the second lens.
The lens unit for an image pickup device is first attached to a predetermined image pickup device main body having a first lens and a light source including a plurality of light emitting elements arranged so as to surround the first lens. When attached in this state, the light emitting surface of the light source is covered with the light incident surface of the light guide member, and the first optical axis of the first lens and the second optical axis of the second lens are aligned with each other. When mounted in a second mounting state different from the first mounting state and configured to match, the light emitting surface is released from the cover by the light incident surface and the second lens is released. It is configured so that it deviates from the first optical axis.
The light guide member is formed by forming the light incident surface in a ring shape corresponding to the arrangement of the plurality of light emitting elements and forming the light emitting surface in a ring shape having a diameter smaller than that of the light incident surface. When the illuminance of the light from the light source on the subject located on the first optical axis and at the focusing distance is in the first mounting state than in the second mounting state. Is configured to be high,
A lens unit for an imaging device.

Images