JPH0417123Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a camera holder that holds a CCD camera for illuminating an affected area and photographing the affected area for examination, mainly in dental treatment.

Prior Art In dental treatment, for example, a tooth root is cut, shaped, and cleaned, and then a filling is placed inside the tooth root. Use a scope to see. Optical scopes used to be used, but in recent years, advances in electronic technology have increased the number of CCD (solid-state imaging device) pixels, allowing for high resolution scopes, as well as improvements in light sensitivity and color reproducibility. Because of this, attempts have been made to use CCD cameras instead of optical ones. An optical scope transmits an image of the affected area through a target lens that opens toward the affected area, and guides the image of the affected area to the eyepiece via a lens, etc., while the illuminating light for the affected area is
This is done through a beam splitter disposed in the lens system, and the light source is guided to the beam splitter via an optical path provided elsewhere. As a result,
Optical scopes are extremely large and difficult to grip, and require the inconvenience of attaching a camera to the eyepiece for taking pictures. On the other hand, in systems using a CCD camera, images of the affected area are directly projected onto the CCD camera via an objective lens, an optical fiber, and an optical lens to obtain an image signal. Illumination is provided via further optical fibers or light guides arranged coaxially or parallel to said optical fiber.

However, in the optical system of such a CCD camera, due to the relative position between the affected area and the CCD camera, it is not possible to provide a common video transmission path for all sections leading to the CCD camera, and multiple video transmissions are required. Because it requires a road,
It is exchangeably connected to the CCD camera via an adapter. As a result, it was necessary to align the optical axes, which required advanced technology. In addition, when photographing an affected area, there is a problem that camera shake is likely to occur because there is no support near the affected area.

Purpose This invention was developed in view of the above-mentioned circumstances, and includes a camera holder that houses a CCD camera, and a reflection mirror that reflects and projects images of the affected area onto the CCD camera, so that it is located on the optical axis of the CCD camera. A mirror holder that holds the mirror and a light guide that illuminates the affected area via the mirror are fixedly installed,
The purpose of the present invention is to provide a camera holder that stably holds a CCD camera using the mirror part as a support point and makes it possible to take clear images of the affected area without blur. The purpose is to provide an inexpensive scope.

Configuration Figure 1 is a side sectional view (cross-sectional view taken along the - line in Figure 2) of the camera holder of the present invention, Figure 2 is a plan view,
FIG. 3 is a cross-sectional view taken along the - line in FIG. Shadows are processed. 4 is a cylindrical holder that houses CCD camera A and cap 4.
1, but after storage, seal the rear of the CCD camera and the cap 41 so that the CCD camera A does not move.
A spring 43 is stretched between the lens portion 2 and the inner surface via a washer 42, and the front surface of the lens portion 2 is pressed and fixed to the outer circumferential inner surface of the lens opening hole 46 by the force of the spring. Furthermore, when the focus adjustment ring 21 is rotated in the direction of the arrow F, an "O" ring 44 is installed in a groove bored on the inner surface of the cylindrical holder 4 so that the CCD camera A does not rotate in the direction of rotation.
is buried, and due to the elasticity of the “O” ring 44,
It suppresses 1 part of CCD. In order to manually adjust the focus, a window 45 into which an operating finger can be inserted is bored in the cylindrical holder 4 portion of the focus adjustment ring 21. This window 4
5 is perforated on both sides as shown in FIG.
5 is a cylindrical mirror holder that allows you to view images of the affected area.
This serves as a guide for moving the mirror 52 that reflects and projects onto the CCD camera A to a desired position. A support rod 51 is inserted and held in the mirror holder, and the mirror 52 is fixed to a tip support portion 53 of the support rod 51 or rotatably fixed by a fixing means (not shown). The mirror is the front axis L- of CCD camera A.
It has a variable angle θ in L and is also moved in the axial direction. A plurality of "O" rings 54 are inserted into the insertion portion of the support rod 51 into the mirror holder 5, so that the support rod 51 can be moved and held at any position.
Reference numeral 6 denotes a light guide holder, into which a light guide 61 is similarly movably inserted and held.
The light guide 61 emits illumination light to illuminate the affected area, and the illumination light is reflected by the mirror 52 and irradiated onto the affected area. Illumination light is introduced into the light guide 61 from a light source (not shown) through a light cable 62 that is a light guide. Since the illumination light reaches the affected area via the mirror 52, the light guide 6
1 must be fixed in the direction of the mirror 52. Therefore, in consideration of the movement width of the mirror 52, it is preferable that the mirror holder 5 and the light guide holder 6 are placed side by side at a slight angle so that they intersect at an intermediate position. In addition, the mirror 52
is fixed at a slight angle δ so as to be located on the optical axis LL.

The mirror holder 5 and the light guide holder 6 are placed side by side on the cylindrical holder 4 at a slight angle, and are fixedly installed by a holder support 7 at an angle δ. Note that it is convenient if the mirror holder 5 and the light guide holder 6 are made to have the same diameter and size, since the mirror 52 and the light guide 61 can be mutually changed in position.

Effects By using the camera holder of the present invention described above, the image of the affected area reflected by the mirror 52 can be effectively transferred to the CCD camera A without being significantly attenuated.
guided by. Further, by adjusting the angle θ of the mirror 52, a more effective image can be obtained, and a lightweight and inexpensive photographing means can be provided.

Furthermore, by supporting the mirror 52 at a convenient position within the oral cavity, it is possible to prevent camera shake and the like, and to prevent operator fatigue, especially during long-term observation.

[Brief explanation of the drawing]

Figures 1 to 3 show the structure of the camera holder of the present invention, in which Figure 1 is a side sectional view, Figure 2 is a plan view, and Figure 3 is the same as in Figure 1.
FIG. A...CCD camera, 1...CCD, 2...lens section, 4...cylindrical holder, 5...mirror holder,
6... Light guide holder, 7... Holder support, 43... Spring, 44... "O" ring, 52
...Mirror, 54..."O" ring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A CCD camera consisting of a lens part and a CCD that converts an image from the lens part into an electrical signal is removably pressed and fixed, and a window is provided to enable manual adjustment of the focal point of the lens. A cylindrical holder that opens and a holding bar that holds a mirror that reflects and projects the image of the object onto a CCD camera at the tip so that the reflection angle can be fixed or rotated, allowing it to move in the axial direction and rotate around the axis. a cylindrical mirror holder that holds a light guide that illuminates the object through the mirror, and a cylindrical light guide holder that holds a light guide that illuminates the object through the mirror, and the mirror holder and the light guide holder are arranged side by side in the axial direction in the cylindrical holder. do,
A camera holder that is fixed. (2) The camera holder according to claim 1, wherein the mirror and the light guide have the same inner diameter so that they can be held in either a mirror holder or a light guide holder. (3) The utility model registration claim 1 or 2 is characterized in that the mirror holder and the light guide holder, which are fixed to the cylindrical holder in substantially parallel manner, are inclined toward the axis of the cylindrical holder. Camera holder listed.