JP2007019656A - Enlargement imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To pick up an image which is in focus with either low or high magnification without the trouble to attach and detach a cap for magnification variation, not to mention lens replacement. <P>SOLUTION: The imaging device includes an imaging element (5) which brings the observation hole (3) into contact with an observed body surface and picks up an image of an observed body incident from an observation hole (3) of a dome-shaped observation head (2) formed on an optical axis (X) of imaging while enlarging the image to specified magnification through an imaging optical system (4), and also includes a lighting system (6) for irradiating the observed body with illumination light from inside the observation head (2). Further, the imaging device includes a lens driving motor (8) which switches observation magnification by reciprocally moving some or all of lenses (7) constituting the imaging optical system (4) along the optical axis of imaging between a low-magnification observation position (QL) and a high-magnification observation position (QH) and an aperture adjusting mechanism (9) which increase the diameter of the observation hole (3) during a low-magnification observation and decreases the diameter of the observation hole (3) during a high-magnification observation associatively with the movement of the lenses (7)in such a case. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an enlargement imaging apparatus for magnifying and observing the surface of an object to be observed, and in particular, a beauty staff who sells cosmetics determines the optimal cosmetics, champagne, etc. according to the condition of the customer's skin and scalp. This is suitable for magnifying and observing the customer's skin, scalp, etc.

Cosmetics are applied directly to the skin to make the skin appear white or rough skin becomes smoother, so each cosmetic manufacturer offers many types of cosmetics according to the skin quality. I sell it.
Therefore, while consumers can select cosmetics that suit their skin quality from many types, they are often unable to select truly suitable cosmetics because they do not know their skin quality.

This is the same for beauty staff who sell cosmetics, and if you know exactly the skin quality of your customers, you can advise on cosmetics and skin care that are appropriate for that skin quality. The actual situation is that he advises cosmetics that will fit the customer's skin quality based on the experience and intuition he has cultivated.
Therefore, recently, various diagnostic devices have been introduced to promote the sales of cosmetics, and each company has been working hard to provide the best cosmetics for customers' skin quality.

A magnified imaging device for observing the skin is also used as one of such diagnostic devices, but there is a demand for observing by changing the magnification factor depending on the observation target.
For example, when observing the fineness of the texture formed by fine twills that run diagonally in the vertical and horizontal directions, it is preferable to image a range of 1 to 2 cm in diameter with a relatively low imaging magnification of about 20 times. When observing each of the textures (textures), it is preferable to image a very limited area having a diameter of 1 to 2 mm with a high imaging magnification of about 200 times.

However, in order to change the imaging magnification, it is troublesome to change the lens or change the illumination light intensity by operating the switch, so the applicant is troublesome to change the lens every time the magnification is changed. In addition, there has been proposed a trouble-free enlargement imaging apparatus that performs a switch operation for switching the intensity of illumination light each time the magnification is changed.
Japanese Patent No. 3626415

  According to this enlargement imaging apparatus, the imaging magnification can be switched by moving the position of the bifocal lens in the optical axis direction, and the low magnification imaging illumination and the high magnification imaging illumination are automatically switched according to the position of the lens. Since switching is performed, there is no need to perform any switch operation for exchanging lenses or switching illumination light.

However, since imaging is performed through one observation hole during both low-magnification imaging and high-magnification imaging, the observation hole must be made relatively large to have a diameter of 15 mm in accordance with a low-magnification imaging area.
Therefore, when this is pressed against the skin, the skin swells in the observation hole due to its elasticity, and when imaging at a low magnification with a deep depth of field, yet when imaging at a high magnification with a shallow depth of field Caused the problem of focusing or shifting depending on how the skin swelled.

  For this reason, during high-magnification imaging, it is necessary to cover the cap with a small-diameter observation hole to prevent the skin from rising, and there is no need to replace the lens. There is also the trouble of having to prepare a spare cap in preparation.

  Therefore, the present invention provides a technical problem that when changing the magnification, it is not necessary to replace the lens, and it is not necessary to attach and detach the cap, and it is possible to capture a focused image at both low magnification and high magnification. It is said.

  In order to achieve this object, the present invention makes the observation hole of the dome-shaped observation head formed on the imaging optical axis abut on the surface of the object to be observed, and the object to be observed that has entered from the observation hole. An imaging optical system comprising: an imaging device that includes an imaging device that magnifies an image to a predetermined magnification by an imaging optical system; and an illumination system that irradiates an observation object with illumination light from the inside of the observation head. A lens drive motor that reciprocally moves a part or all of the lenses constituting the lens to the low magnification observation position and the high magnification observation position along the imaging optical axis direction to switch the optical magnification, and the position of the lens is moved by the drive motor In conjunction with this, there is provided a diameter adjusting mechanism for expanding the observation hole at the time of low magnification observation and reducing the diameter of the observation hole at the time of high magnification observation.

According to the magnifying image pickup apparatus of the present invention, the lens drive motor moves a part or all of the lenses constituting the imaging optical system to the low magnification observation position and the high magnification observation position along the imaging optical axis direction. The optical magnification can be switched between low magnification and high magnification.
In addition, when the lens is moved, the diameter of the observation hole is adjusted so that the observation hole is enlarged during low magnification observation and the observation hole is reduced during high magnification observation.
Therefore, by moving the lens position, the optical magnification can be switched, and at the same time, the aperture of the observation hole can be adjusted according to the optical magnification, so that it is necessary to perform a special operation for adjusting the aperture. Absent.

  When the illumination light intensity needs to be changed, as described in claim 4, the illumination system includes a low-magnification imaging illumination for illuminating an imaging area during low-magnification imaging and an imaging area during high-magnification imaging. A high-magnification imaging illumination that illuminates at a higher illuminance than the low-magnification imaging illumination is provided, and when the optical magnification is changed, the low-magnification imaging illumination and the high-magnification imaging illumination are switched on in conjunction with this change. That's fine.

  In this example, when changing the magnification, in addition to replacing the lens, it is not necessary to attach and detach the cap, and in order to achieve the purpose of capturing a focused image at both low and high magnifications. In addition, the aperture of the observation hole can be adjusted in conjunction with a lens driving motor that switches the optical magnification by moving the lens.

  FIG. 1 is a schematic configuration diagram showing a magnifying imaging apparatus according to the present invention, FIG. 2 is an explanatory diagram showing a positional relationship of an imaging optical system according to the magnification, and FIG. 3 is an explanatory diagram showing an illumination system.

  The magnified image pickup apparatus 1 shown in FIG. 1 makes the observation hole 3 of the dome-shaped observation head 2 formed on the imaging optical axis abut on the surface of the object to be observed, and the object to be observed entered through the observation hole 3. An imaging device 5 is provided for enlarging an image at a predetermined magnification by the imaging optical system 4 and an illumination system 6 for irradiating the observation object with illumination light from the inside of the observation head 2.

  A lens drive motor 8 that switches the observation magnification by reciprocating a part or all of the lenses 7 constituting the imaging optical system 4 to the low magnification observation position and the high magnification observation position along the imaging optical axis direction is provided. When the position of the lens 7 is moved by the drive motor 8, the diameter adjusting mechanism 9 expands the diameter of the observation hole 3 at the time of low magnification observation and reduces the diameter of the observation hole 3 at the time of high magnification observation. It has.

As shown in FIG. 2, the imaging optical system 4 includes a lens holder 10 equipped with a bifocal lens 7 that can be used at two magnifications, a low magnification (for example, 20 times) and a high magnification (for example, 200 times). It is slidably arranged in a lens barrel 11 fixed in parallel with the imaging optical axis X.
The driven pin 12 protruding from the peripheral surface of the lens holder 10 is related to the intersection of the linear slit S ₁ of the lens barrel 11 and the spiral slit S ₂ of the cylindrical cam 13 rotatably mounted on the lens barrel 11. The pinion 8 a of the drive motor 8 is engaged with the external gear 14 formed on the outer peripheral surface of the cylindrical cam 13.

As a result, when the drive motor 8 rotates forward and backward, the cylindrical cam 13 rotates forward and backward, and the intersection of the linear slit S ₁ and the spiral slit S ₂ moves back and forth along the imaging optical axis X. lens 7 Te is moved together with the lens holder 10, low magnification to be described later to lower the magnification observation aperture 15L and the high magnification observation if the surface of each of the apertures 15H observation object which is in contact with the focus position F _L and F _H lens 7 is adapted to be positioned at the imaging position Q _L and the high magnification image pickup position Q _H.

  The aperture adjusting mechanism 9 includes an aperture adjusting body 16 having a large aperture (about 15 mm in diameter) low magnification observation aperture 15 </ b> L and a small aperture (about 6 mm diameter) high magnification observation aperture 15 </ b> H formed on the inner surface of the observation head 2. And a motion transmission mechanism 17 that transmits the rotation of the cylindrical cam 13 of the imaging optical system 4 to the aperture adjuster 16 when the lens 7 is moved by the lens driving motor 8.

  The aperture adjuster 16 is formed in a revolver type that can be rotated about a rotation axis θ inclined with respect to the imaging optical axis X, and by rotating this, the low magnification observation aperture 15L and the high magnification The observation aperture 15H is advanced and retracted to adjust the diameter of the observation hole 3.

The motion transmission mechanism 17 includes pinions 19 a and 19 b meshing with the external gear 14 and the internal gear 18 between the external gear 14 of the cylindrical cam 13 and the internal gear 18 formed on the aperture adjustment body 16 at both ends. The formed intermediate gear 19 is interposed.
When the lens 7 is in the low-power imaging position Q _L, when driving to the right showing the cylindrical cam 13 in the arrow A ₁ by the lens driving motor 8, the intersection of the straight slits S ₁ and the spiral slit S ₂ forward Go to thereby the lens holder 10 is linearly moved toward the X front imaging optical axis indicated by the arrow a _2, the lens 7 is positioned with high magnification imaging position Q _H.
Also, in conjunction with this, since the pinion 19a and 19b are rotated in the right direction indicated by the respective arrows A ₃ and A _4, the diameter adjustment member 16 is rotated in the left direction indicated by arrow A _5, the high magnification observation aperture 15H advances on the imaging optical axis X, and the diameter of the observation hole 3 is adjusted.

  The illumination system 6 includes a low-magnification imaging illumination 20L that illuminates an imaging area surrounded by the low-magnification observation aperture 15L during low-magnification imaging, and a low-magnification imaging illumination that illuminates the imaging area surrounded by the high-magnification observation aperture 15H during high-magnification imaging. A high-magnification imaging illumination 20H that illuminates at a higher illuminance than 20L is provided, and when the observation head is rotated and the low-magnification observation aperture 15L and the high-magnification observation aperture 15H are positioned on the imaging optical axis X, this is linked. The illumination switching means 21 is provided for switching and lighting the low magnification imaging illumination 20L and the high magnification imaging illumination 20H.

  In this example, a large number of high-intensity white LEDs are arranged in a ring around the imaging optical axis X, and as shown in FIG. 3, twelve pieces of high-magnification imaging illumination 20H are arranged at 30 ° central angles. LEDs and six LEDs that become low-magnification imaging lighting 20L arranged at intervals of 60 ° between the central angles are attached to a ring-shaped pedestal 22.

The low-magnification imaging illumination 20L uses an LED with a wide irradiation angle, and its irradiation optical axis is arranged obliquely toward the center of the observation hole 3 so that the observation hole 3 can be uniformly irradiated.
The high-magnification imaging illumination 20H uses an LED with a narrow illumination angle, and the illumination light is reflected by the mirror 23 arranged in the observation head 2 so as to be illuminated in a spot manner in the high-magnification observation aperture 15H. It has become.

  In this way, the number of LEDs of the high-magnification imaging illumination 20H is arranged more than the LEDs of the low-magnification imaging illumination 20L, and the high-magnification imaging illumination 20H is condensed so that the irradiation area is the irradiation area of the low-magnification imaging illumination 20L. Therefore, the high magnification imaging illumination 20H can illuminate with high illuminance, and a sufficiently bright image can be obtained.

Further, as the illumination switching means 21, in this example, as shown in FIG. 2, the switch operation projection 24 formed on the outer peripheral surface of the cylindrical cam 13, and the low magnification and high magnification imaging illumination operated by the operation projection 24. Two micro switches 25L and 25H for lighting are provided.
Microswitch 25L for low magnification imaging illumination lights, the lens 7 is arranged to correspond to the position of the operating projection 24 when positioned in the low magnification observation position Q _L, microswitch 25H for high magnification imaging illumination lit, lens 7 is disposed so as to correspond to the position of the operating projection 24 when positioned in the high magnification observation position Q _H.

Thus, the lens 7 when located in low-magnification observation position Q _L, the micro switch 25L for low magnification imaging illumination turned on by operating projection 24 is turned ON, the low-power imaging illumination 20L is turned on.
Further, when the lens 7 is positioned at the high magnification observation position Q _H is the operation projection 24 microswitch 25H high magnification imaging illumination lights are turned ON, so that the high magnification imaging illumination 20H are turned on.

Note that the illumination system 6, the illumination light polarization filter P ₁ for linearly polarizing the illumination light irradiated from the low-power imaging illumination 20L ... LED of are arranged.
The polarization filter P ₁ covers the front of the pedestal 22 is formed as a polarizing film annular pierced portion that transmits illumination light from the high-magnification imaging illumination 20H ... LED of.

An observation light polarization filter P ₂ that transmits light that is reflected by the object to be observed and incident on the image pickup device 5 can be moved back and forth on the image pickup optical axis X that passes through the imaging optical system 4 and reaches the image pickup device 5. When the lens 7 is positioned at the low-magnification observation position Q _L by rotating the cylindrical cam 13, the observation light polarization filter P ₂ is advanced on the imaging optical axis X in conjunction with the lens 7. the has a filter reciprocating mechanism 26 for retracting from the imaging optical axis X of the observation light polarization filter P ₂ in conjunction with this when is positioned in the high magnification observation position Q _H.

The observation light polarization filter P _2, when a polarized light irradiated from the low-power imaging illumination 20L is reflected from the object to be observed, is reflected by the skin surface to cut the optical component whose polarization direction is maintained, intended to detect only the light components the polarization direction is changed by being reflected within the skin, its polarization direction is disposed so as to be crossed Nicols with respect to the illumination light polarization filter P _1.

The filter advance / retreat mechanism 26 includes a frame 27 to which the polarizing filter P ₂ is attached, a rotating shaft 28 that supports the polarizing filter P ₂ , and an operation lever 29 that is formed integrally with the frame 27. spring 30 the polarization filter P ₂ for biasing the frame 27 so as to be positioned on the imaging optical axis X is provided in the.
Then, following the observation head 2, when the operating element 31 attached to the cylindrical cam 13 rotates and the lens 7 is positioned at the high magnification imaging position Q _H , the operating element 31 moves the operating lever 29. the frame 27 pressed by springing up against the resilience of the spring 30, so as to retreat the polarization filter P ₂ from the imaging optical axis X.
Thereby, at the time of high-magnification imaging, there is no polarizing filter that reduces the light in the optical path reaching the imaging device when the light irradiated from the high-magnification imaging illumination 20H is reflected by the object to be observed. Therefore, it is possible to more clearly capture a high-magnification image that requires.

  Further, although not shown in the drawings, the imaging device 1 has a built-in driver for the imaging device 5, which transmits an image signal to a computer or the like by wire or wirelessly and displays the image on a computer display.

The above is one configuration example of the present invention, and the operation thereof will be described next.
First, when imaging at a low magnification, the enlargement imaging device 1 is connected to a computer (not shown), a main switch (not shown) of the imaging device 1 is turned on, and then a low magnification setting switch of the lens drive motor 8 When (not shown) is pressed, the lens 7 is positioned at the low-magnification imaging position Q _L , and in conjunction with this, as shown in FIG. 2A, the aperture adjuster 16 is rotated to rotate the low-magnification observation aperture. 15L advances on the imaging optical axis X.

At the same time, the switch operation projection 24 formed on the cylindrical cam 13 turns on the micro switch 25L to light the low-magnification imaging illumination 20L, and the operation element 31 of the filter advance / retreat mechanism 26 moves away from the operation lever 29. since the frame 27 by the resilience of the spring 30 is biased to the imaging optical axis X side, the polarization filter P ₂ advances on the imaging optical axis X.
In this state, when the observation head 2 is applied to the skin to be observed, the portion surrounded by the low-magnification observation aperture 15L is imaged at a magnification of 20 times.

At this time, light emitted from the low-power imaging illumination 20L is linearly polarized by the illumination light polarization filter P _1, after being irradiated to the object to be observed, the reflected light is transmitted through the observation hole polarizing filter P ₂ captured Incident on the element 5.
Therefore, the light component that is directly reflected on the skin surface and the polarization direction is maintained is cut, and the light component that is indirectly reflected inside the skin and the polarization direction is changed is imaged. Suitable for observing.

Then, when imaging at high magnification, pressing low magnification setting switch of the lens drive motor 8 (not shown), the lens 7 is positioned in the high magnification image pickup position Q _H, in conjunction with this FIG. 2 (b ), The aperture adjustment body 16 rotates and the high-magnification observation aperture 15H advances on the imaging optical axis X.

At the same time, the switch operation projection 24 formed on the cylindrical cam 13 turns on the micro switch 25H, the high magnification imaging illumination 20H is turned on, and the operation element 31 of the filter advance / retreat mechanism 26 presses the operation lever 29. , the frame 27 is swung against the resilience of the spring 30, the polarization filter P ₂ retracted from the imaging optical axis X.
In this state, when the observation head 2 is applied to the skin to be observed, the portion surrounded by the high magnification observation aperture 15H is imaged at a magnification of 200 times.

At this time, the light irradiated from the high-magnification imaging illumination 20H has a narrow irradiation angle, and is emitted substantially parallel to the imaging optical axis X, and then is reflected by the mirror 23 disposed in the imaging head 2 to be high-magnification. The observation aperture 15H is irradiated in a spot manner from the side surface toward the center.
Therefore, not only can a narrow imaging area surrounded by the high-magnification observation aperture 15H be irradiated with a sufficient amount of light, but also because it is irradiated from all directions around it, it is difficult to shade, and further, Side-illumination with a large incident angle with respect to the surface makes not only the unevenness of the enlarged skin surface clearly visible, but the light that is specularly reflected on the skin surface does not travel in the direction of the imaging optical axis X Therefore, imaging troubles such as halation are not caused.

As described above, according to the magnifying image pickup apparatus 1 of the present example, not only can the lens 7 be positioned at a predetermined position and the magnification conversion can be performed only by driving the lens driving motor 8, in conjunction, the very that the low magnification observation aperture 15L and the high magnification observation aperture 15H can be positioned on the optical axis, further, switching of illumination 20L and 20H, it is possible to perform the advance and retreat of the polarization filter P ₂ Excellent effect.

In addition, although the case where the aperture adjustment body 16 in which the low-magnification observation aperture 15L and the high-magnification observation aperture 15H are formed on the peripheral surface is arranged inside the imaging head 2 as the aperture adjustment mechanism 9 has been described, the present invention is not limited thereto. Alternatively, the imaging head 2 may be removed to expose the aperture adjustment body 16 and the aperture adjustment body 16 may be used as an imaging head.
That is, the large-diameter low-magnification observation aperture 15L and the small-diameter high-magnification observation aperture 15H that form the observation hole 3 are formed on the peripheral surface of the observation head 2, and the observation head 2 is rotated in conjunction with the lens 7. Thus, the aperture of the observation hole 3 may be adjusted by moving the low-magnification observation aperture 15L and the high-magnification observation aperture 15H back and forth on the imaging optical axis X.

  In the present invention, the beauty staff who sells cosmetics determines the surface of an object to be observed such as the customer's skin or scalp, for example, when determining the optimal cosmetics or champulins depending on the condition of the customer's skin or scalp. It is suitable for applications in which the magnification is changed such as 20 times and 200 times.

1 is a schematic configuration diagram showing an enlarged imaging apparatus according to the present invention. Explanatory drawing which shows the positional relationship of the imaging optical system according to magnification. Explanatory drawing which shows an illumination system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnification imaging device 2 Observation head 3 Observation hole X Imaging optical axis 4 Imaging optical system 5 Imaging element 6 Illumination system 7 Lens 8 Lens drive motor 9 Aperture adjustment mechanism 15L Low magnification observation aperture 15H High magnification observation aperture 16 Aperture adjustment body

Claims (6)

The observation hole of the dome-shaped observation head formed on the imaging optical axis is brought into contact with the surface of the observation object, and the image of the observation object incident from the observation hole is enlarged to a predetermined magnification by the imaging optical system. In an enlargement imaging device comprising an imaging device for imaging and an illumination system for irradiating illumination light to the object to be observed from the inside of the observation head,
A lens drive motor for switching the observation magnification by reciprocating a part or all of the lenses constituting the imaging optical system to the low magnification observation position and the high magnification observation position along the imaging optical axis direction;
In conjunction with this, when the position of the lens is moved by the drive motor, a diameter adjustment mechanism is provided that expands the observation hole during low magnification observation and reduces the observation hole during high magnification observation. An enlargement imaging apparatus.   The aperture adjustment mechanism is configured such that an aperture adjustment body in which a large aperture low aperture observation aperture and a small aperture high magnification observation aperture are formed on the peripheral surface is arranged inside the observation head, and the aperture adjustment body is rotated to reduce the aperture. The magnification observation apparatus according to claim 1, wherein the magnification observation aperture and the high magnification observation aperture are moved forward and backward on the imaging optical axis to adjust the aperture of the observation hole.   The aperture adjustment mechanism has a large-diameter low-magnification observation aperture and a small-diameter high-magnification observation aperture that form an observation hole on the peripheral surface of the observation head, and the low-magnification observation aperture is rotated by rotating the observation head. The magnification observation apparatus according to claim 1, wherein the aperture of the observation hole is adjusted by advancing and retracting the high magnification observation aperture on the imaging optical axis.   The illumination system includes a low-magnification imaging illumination that illuminates the observation object during low-magnification imaging, and a high-magnification imaging illumination that illuminates the observation object with higher illuminance than the low-magnification imaging illumination during high-magnification imaging, and moves the lens The magnifying image pickup apparatus according to claim 1, further comprising an illumination switching unit that turns on the low-magnification imaging illumination and the high-magnification imaging illumination in conjunction with the low-magnification observation position and the high-magnification imaging illumination when positioned at the low-magnification observation position and the high-magnification observation position.   5. The magnifying imaging device according to claim 4, wherein as the low-magnification imaging illumination and the high-magnification imaging illumination, a large number of high-brightness LEDs are annularly arranged around the imaging optical axis. An illumination light polarization filter that linearly polarizes illumination light of the low-magnification imaging illumination is provided in the illumination optical path from the low-magnification imaging illumination to the surface of the object to be observed, and on the imaging optical axis, the illumination light polarization filter An observation light polarizing filter having a relationship between the polarization direction and orthogonal Nicols is provided so as to be able to move forward and backward, and when the lens is moved to a low magnification observation position, the observation light polarizing filter advances on the imaging optical axis in conjunction with this. The magnification imaging apparatus according to claim 4, further comprising a filter advance / retreat mechanism.

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