JP2009063857A - Lens attachment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable proximity photographing without impairing simplicity of a mobile phone with a camera device. <P>SOLUTION: A lens attachment includes: a lens part comprising one or more lenses; a space part provided in the side opposite to a side in contact with the mobile phone of the lens part and having an opening adhered on an object by forming a prescribed space; a light source provided at a position not obstructing an optical axis of the lens part of the space part and radiating parallel light from oblique side of the object adhered on the opening; a power source of the light source; and a switch of the power source. Preferably, a pair or more of the light sources facing each other are provided. For instance, the light source includes an LED, and an optical element for converting an optical beam radiated from the LED into a parallel optical beam. The optical element is a lens formed in the form of a ring. A plurality of LEDs are arranged at positions corresponding to a circumference of the lens. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is used in a camera device provided in a mobile phone. It is particularly suitable for use in close-up photography.

  Mobile phones with camera devices are widely used, and the performance of camera devices is also increasing. According to the recent high performance of camera devices, it can be used not only for taking simple snapshots but also for various purposes.

  Furthermore, a lens attachment for a mobile phone as disclosed in Patent Document 1 has also been proposed, and the use of the mobile phone with a camera device is becoming more and more widespread.

  Thus, although it is a mobile phone with a camera device widely used, the main factor of the spread is the ease. That is, the ease with which a mobile phone functions as a camera device when taking a picture without carrying a single camera device meets the user's needs.

JP 2004-170896 A

  As described above, the application of the camera-equipped mobile phone is spreading widely, but there is still a problem to be solved in the field of close-up photography. It is a light source.

  A mobile phone with a camera device has a simple light source that uses an LED or the like for snapshot photography at night or in a dark place, but this light source is not intended for close-up photography. Therefore, it is difficult to irradiate the entire subject with photographing light without unevenness. However, it is not appropriate to prepare a separate light source because the convenience of the camera-equipped mobile phone is impaired.

  The present invention has been made under such a background, and an object of the present invention is to provide a lens attachment that enables close-up photography without impairing the convenience of a mobile phone with a camera device.

  The present invention is a lens attachment that includes a lens holding part that is detachable from a housing of a mobile phone, and a lens device that is held by the lens holding part and is attached to a position of a camera device included in the mobile phone.

  Here, a feature of the present invention is that the lens device is provided on a side of the lens unit opposite to the side that contacts the mobile phone, and forms a predetermined space. A light source that irradiates parallel light from an oblique side to a subject that is provided at a position that does not interfere with the optical axis of the lens portion of the space, and that has an opening that is in close contact with the subject; A power source for the light source and a switch for the power source are provided.

  According to this, since the lens attachment main body is equipped with a light source and its power source, the user does not need to prepare a separate light source, and can perform close-up photography while maintaining the convenience of a mobile phone with a camera device. Can do.

  It should be noted that it is desirable that a pair of the light sources be provided opposite to each other in order to uniformly irradiate the subject with photographing light.

  For example, the light source includes an LED and an optical element that converts a light beam emitted from the LED into a parallel light beam. This optical element is, for example, a lens formed in a ring shape, and a plurality of the LEDs can be arranged at positions corresponding to the circumference of the lens. According to this, since the photographing light is uniformly irradiated from the surroundings to the subject, it is possible to perform good photographing without unevenness.

  According to the present invention, close-up photography can be performed without impairing the convenience of a mobile phone with a camera device.

  A lens attachment according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a state in which the lens attachment of this embodiment is mounted on a mobile phone. FIG. 2 is a top view of a state in which the lens attachment of this embodiment is mounted on a mobile phone. FIG. 3 is a front view of a state in which the lens attachment of this embodiment is mounted on a mobile phone. FIG. 4 is a configuration diagram of the lens attachment of the present embodiment. FIG. 5 is a diagram showing a ring-shaped collimating lens and LEDs arranged in a ring shape.

  The present invention includes a lens holder 1 that is detachably attached to a casing of a mobile phone 10 and a lens that is held by the lens holder 1 and is attached to a protective glass 11 of a lens 12 of a camera device that the mobile phone 10 has. A lens attachment including the device 2.

  As shown in FIG. 2, the lens holding unit 1 includes support plates 1-1 and 1-2 that sandwich the casing of the mobile phone 10 from the left and right, and a holding plate 1-3 that holds the lens device 2. . The support plates 1-1 and 1-2 are provided with springs (not shown) around the shafts 1-4 and 1-5 so that the casing of the mobile phone 10 is sandwiched by the pressure generated by the springs. It has become. Moreover, if it is in the movable range of the support plates 1-1 and 1-2, it can respond to the dimension of the various mobile telephones 10. FIG. Further, rubber sheets or the like may be provided on the portions of the support plates 1-1 and 1-2 that are in contact with the casing of the mobile phone 10 for preventing slipping and preventing scratches.

  Here, as a characteristic feature, the lens device 2 is provided on the opposite side of the lens unit 6 composed of one or more lenses and the side of the lens unit 6 in contact with the mobile phone 10 as shown in FIG. The space portion 7 having the opening portion 5 that forms a predetermined space and is in close contact with the subject, and the optical axis (illustrated by a one-dot chain line) of the lens portion 6 of the space portion 7 is provided at a position that does not interfere with the opening portion 5. A light source 8 that irradiates parallel light from an oblique side to a close subject, a power source 9 of the light source 8, and a switch 3 of the power source 9 are provided.

  According to this, since the light source 8 and its power source 9 are provided in the lens attachment body, the user does not need to prepare a separate light source, and can perform close-up shooting while maintaining the convenience of the camera-equipped mobile phone. It can be carried out.

  The light source 8 has a ring shape in order to irradiate the subject with photographing light evenly. The light source 8 can be realized by the collimating lens 8-1 and the LED 8-2. That is, the collimator lens 8-1 is used to convert the light beam emitted from the LED 8-2 into a parallel light beam and irradiate the subject.

  The structure of the collimating lens 8-1 and the LED 8-2 will be described in more detail. As shown in FIG. 5, the collimating lens 8-1 is formed in a ring shape, and the LED 8-2 is a circle of the collimating lens 8-1. A plurality are arranged at positions corresponding to the circumference. The number of LEDs 8-2 shown in FIG. 5 is an example, and in practice, the number is appropriately set based on the capacity and power consumption of the battery.

  The switch 3 may be an alternate type in which the light source 8 is turned on when pressed once, and the light source 8 is extinguished when pressed once, or the light source 8 is turned on only while the switch 3 is pressed. It may be a method.

  The power source 9 is a battery housed in the battery box 4, and it is desirable to use a small battery such as a button battery. In the present embodiment, the switch 3 is attached to the battery box 4.

  The space portion 7 has a role of maintaining a constant distance between the lens portion 6 and the subject (illustrated by a broken line) and a role of ensuring a space for irradiating the subject with photographing light from the light source 8. Thereby, the adjustment of the focal length of the lens unit 6 becomes unnecessary. Thus, even if the adjustment of the focal length is not required, close-up photography can be performed without impairing the convenience of the mobile phone with a camera device.

  The opening 5 has a role of fixing the subject at an appropriate position by bringing the edge of the opening 5 into close contact with the subject.

(Explanation of effect)
The effect of the present invention will be described with reference to FIGS. FIG. 6 is a diagram showing a state of close-up photography using a conventional light source for snap photography. FIG. 7 is a diagram showing a state of close-up photography using the light source of the present invention.

  As shown in FIG. 6, when a conventional light source for snap photography is used for close-up photography, a non-delivery area of photographing light is generated due to a shift in the installation position of the lens and the light source. Therefore, it can be seen that in close-up shooting, it is difficult to irradiate appropriate shooting light only with the light source provided in the mobile phone.

  On the other hand, as shown in FIG. 7, it can be seen that when the light source of the present invention is used, the entire angle of view of the lens is included within the range of the irradiation angle of the light source. Thus, it can be seen that photographing light suitable for close-up photographing can be obtained.

  Note that, as in the example of FIG. 7, it is desirable to irradiate photographing light from a plurality of light sources from the left and right (in the case of the present embodiment), but even if only one of the left and right light sources is used. All of the angle of view of the lens is included in the range of the irradiation angle of, and without using the ring-shaped light source as shown in FIG. 5, the light source is generated by one LED 8-2 and one piece of collimating lens 8-1. It can be seen that photographing light necessary for close-up photographing can be obtained even if configured.

(Application example)
(Example 1) The user's skin is photographed by pressing the user's skin against the opening 5 as a subject, and the photographed image is transmitted to a predetermined destination by the mobile phone 10, and the transmitted skin image is transmitted to the predetermined destination. By analyzing, the skin condition (water retention, fineness, melanin deposition state, etc.) is diagnosed, and the diagnosis result can be used for a skin diagnosis service such as returning the diagnosis result to the user's mobile phone 10.

  In particular, since the opening 5 is hollow, even if the opening 5 is pressed against the skin, the edge of the opening 5 only hits the skin, and there is no factor that changes the uneven state of the surface of the subject skin. Ideal for photographing the surface of the skin.

In addition, it is essentially the same principle as dark field observation in which light is applied from the side or oblique direction of the observation object and diffracted light or diffused light from the observation object is taken in, and the unevenness of the skin can be photographed clearly. This also enables accurate skin diagnosis.
(Example 2) These articles and photographs are recorded with clear images by pressing the opening 5 against small articles and photographs such as magazines and newspapers that have been difficult to photograph because they are too small in the past. be able to.

  According to the present invention, since it is possible to perform close-up photography without impairing the convenience of a mobile phone with a camera device, the usage range of the mobile phone with a camera device is expanded, and the mobile phone with a camera device is further spread. Can contribute.

The perspective view of the state which mounted | wore the mobile phone with the lens attachment of this embodiment. The top view of the state which mounted | wore the mobile phone with the lens attachment of this embodiment. The front view of the state which mounted | wore the mobile phone with the lens attachment of this embodiment. The block diagram of the lens attachment of this embodiment. The figure which shows LED arrange | positioned at a ring-shaped collimating lens and a ring shape. The figure which shows the condition of close-up photography using the light source for conventional snap photography. The figure which shows the condition of the close-up photography using the light source of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens holding part 1-1, 1-2 Support plate 1-3 Holding board 1-4, 1-5 Axis 2 Lens apparatus 3 Switch 4 Battery box 5 Opening part 6 Lens part 7 Space part 8 Light source 8-1 Collimating lens 8-2 LED
9 Power supply 10 Mobile phone 11 Protective glass 12 Lens (mobile phone side)

Claims (4)

A lens holder that is detachable from the case of the mobile phone;
In a lens attachment comprising: a lens device that is held by the lens holding unit and is mounted at a position of a camera device included in the mobile phone.
The lens device is
A lens unit composed of one or more lenses;
A space portion provided on the opposite side of the lens portion from the side in contact with the mobile phone and having an opening that forms a predetermined space and is in close contact with the subject;
A light source that is provided at a position that does not interfere with the optical axis of the lens portion of the space portion, and that irradiates parallel light from an oblique side to a subject that is in close contact with the opening;
The power source of this light source,
A lens attachment comprising: a switch for the power source.   The lens attachment according to claim 1, wherein a pair of the light sources are provided to face each other.   The lens attachment according to claim 1, wherein the light source includes an LED and an optical element that converts a light beam emitted from the LED into a parallel light beam.   The lens attachment according to claim 3, wherein the optical element is a lens formed in a ring shape, and a plurality of the LEDs are arranged at positions corresponding to a circumference of the lens.

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