JPH04107412A - Enlargement observation device - Google Patents

Abstract

PURPOSE:To make an observation utilizing transmitted light by providing a light shield body inside a photoconductive cap and closing the through hole of the photoconductive cap with the light shield body. CONSTITUTION:The rear part 8r of the light shield body 8 is made cylindrical in conformity with the internal surface shape of the conductive gap 7, the front part 8f is formed in an inverted conic shape whose tip can close the through hole 15 of the photoconductive cap 7, and a light collection hole 17 is formed in the tip. The light shield body is combined with the photoconductive cap 7 while enabled to move relatively as shown by arrows X and Y; and the light shield body is moved as shown by the arrow X to close the through hole 15 of the photoconductive cap with the tip part thereby cutting downward light Ld and sideward light Ls. Consequently, the observation utilizing the transmitted becomes possible.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has applications in the medical, academic, and industrial application fields.
For example, it is used to magnify and observe the outer surface or surface layer of objects to be observed, such as human skin, microscopic living things, or integrated circuits. The present invention relates to a magnifying observation device capable of enlarging and observing an object to be observed in its original position without any processing by simply moving the object.

[Conventional technology]

Traditionally, microscopes and rooms have been used as instruments or devices for magnified observation, but microscopes require processing the object to be observed and bringing it to the microscope, while rooms use themselves to hold the object under observation. Although it can be carried to the side and easily observed without performing any processing on the object to be observed, it is not equipped with a light source for illuminating the object to be observed, and the possible magnification is also low.

Against this background, the applicant first developed a magnifying observation device that combines the high magnification of a microscope and the simplicity of a loupe (Japanese Patent Application Laid-Open No. 1-30852).
No. 7, Japanese Patent Application No. 1-26462 and Japanese Patent Application No. 1-2734
No. 19).

This magnifying observation device consists of an observation device main body consisting of a display (display means) and a controller (not shown), and an objective tool (lens barrel and light guide cap as described in JP-A-1-308527) 100 shown in FIG. The objective tool 100 has a built-in optical system 102 for enlarging an image, and also has an optical fiber 103 that guides irradiation light for illuminating the object M to be observed from a light source provided on the main body of the observation device. is equipped with a light guide cap (objective tip) 105. Then, while holding this objective 100 in your hand, bring the light guide cap 105 into contact with or close to the object M to be observed, and
Image sensor 104 (CCD element) built into 00
The image captured by the camera is reproduced on a display for observation.
If the tip of the light guide cap 105 is brought into contact with the object M to be observed or brought close to it at a predetermined distance, it will automatically come into focus, and anyone can easily use the It is possible to perform observations at magnifications ranging from 1 to 1,000 times.

By the way, in this magnifying observation device, a light source is installed in the controller to obtain more powerful irradiation light, and the irradiation light is guided from this light source to the objective using an optical fiber. A signal processing means for this purpose is also provided within the controller. Therefore,
In addition to the objective and the display, a controller is required, which increases the overall size and is not sufficient in cases where ease of use is more important.

Furthermore, in such a magnifying observation device, it is important for better observation to control the irradiation light irradiated onto the observed object and the control of the image light from the observed object. In other words, the irradiation light that irradiates the object to be observed generally includes incident light that illuminates the object from the front, side light that irradiates the object at a steep angle close to parallel to the front of the object, and light that irradiates the object with a transparent surface. In the case of an object to be observed, there is transmitted light, which illuminates the surface layer from the inside, and image light from the object to be observed includes surface reflected light, which is directly reflected from the surface of the object. Although there is non-surface reflected light that once passes through the surface layer of the object to be observed, more effective observation can be achieved by appropriately selecting or combining these lights.

[Problem to be solved by the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a magnifying observation device that is further downsized and easy to handle, and also allows selection of irradiation light.

[Means to solve the problem]

Such purpose consists of an objective and a display means for displaying an enlarged image of the object to be observed obtained with this objective,
The objective tool is divided into a front block and a rear block that can be brought into and out of contact, and the front block is equipped with an optical system for enlarging the object to be observed and the light source for illuminating the object, and the rear block is used to capture the magnified image from the optical system. A transparent block has a built-in signal processing means for processing signals from the means and the imaging means and outputs the processed signals to the display means, and has a hemispherical front part with a through hole formed in the center at the tip of the front block. A light guide cap is connected to the base end surface of the light guide cap so that the irradiation light from the light source is applied to the proximal end surface of the light guide cap, and an opaque light shielding member with a lighting hole formed at the tip is provided inside the light guide cap. and the distal end of the light shielding body is formed in a shape that allows the through hole of the light guide cap to be closed, and the distal end of the light shield body selectively closes the through hole of the light guide cap. This is achieved by a magnifying observation device in which the light shielding body is movable relative to the light guide cap.

[For production]

In this magnifying observation device, the light source and signal processing means are also built into the objective, so the controller required in the above-mentioned conventional device is not required, and the entire device is made smaller accordingly. Moreover, the built-in of this light source and signal processing means in the objective means that the light source is closer to the object to be observed, which means that the output of the light source can be smaller, and the light source itself can be significantly improved. This leads to miniaturization, and when looking at the signal processing means, since the signal processing means is closer to the imaging means, the capacity of the signal processing means can be much smaller than in the conventional case. This leads to the fact that it can be made much smaller. In other words, incorporating the light source and signal processing means into the objective tool leads to miniaturization of the light source and signal processing means.
This organic relationship, in which miniaturization also enables internalization, is what brings about the overall miniaturization.

Furthermore, in conjunction with the integration of such a light source and signal processing means into the objective, this magnifying observation device incorporates the objective into a front block containing an optical system and a light source, and a built-in imaging means and signal processing means. It is divided into a rear block and can be brought into contact with and separated from the two blocks, so you can easily prepare the front block with special specifications according to the magnification ratio and type of object to be observed, and simply exchange it for the required observation. This makes handling even easier.

Furthermore, in the objective of this magnifying observation device, the irradiated light from the light source passes through the space between the inner surface of the light guide cap and the outer surface of the light shielding body, and illuminates the object to be observed from the front through the through hole. Side emitted light that passes through the solid interior of the light guide cap by total reflection and exits from the inner surface of the through hole, illuminating the object to be observed at a steep angle close to parallel to the front of the object, and Transmitted light that hits the object to be observed from the area and passes through its surface layer to illuminate the object from the inside can be obtained, but by moving the light shield and blocking the hole in the light guide cap with its tip. , it is possible to select only the transmitted light by cutting out the incident light and the side light, making it possible to observe using the transmitted light.

〔Example〕

The present invention will be described in detail below.

This magnifying observation device includes an objective tool 1 as shown in FIG.
It consists of display means (not shown) such as a CRT for reproducing and displaying the enlarged image of the object M obtained by the objective 1.

The objective tool 1 has an elongated cylindrical shape as a whole and is divided into a front block 3 and a rear block 4, and the front block 3 can be attached to and detached from the rear block 4.

The front block 3 has a built-in optical system 5 for enlarging the object to be observed and a light source 6 for illuminating the object to be observed, and a light guide cap 7 is connected to the tip thereof. A light shielding body 8 is disposed inside.

The optical system 5 is made up of a cylindrical holder 9 holding an objective lens 10 and other lenses, and a light-shielding bottom 11 formed in a tapered shape is provided at the tip of the holder 9. This optical system 5 basically has an objective lens 10 formed by bringing the tip of the light guide cap 7 into contact with the surface of the object M to be observed.
is positioned so that its focal point matches the surface of the object to be observed M, but non-contact observation is also possible by adjusting the screwing state of the light guide cap 7 to the front block 3.

Light #6 is arranged so as to face the proximal end surface 14 of the light guide cap 7 at a position corresponding to the outside of the light-shielding bottom 11 of the holder 9, so that the irradiated light does not directly enter the optical system 5. is taken into consideration.

As the light source 6, as shown in FIG.
b may be arranged in an annular shape, or an annular lamp may be used.

The light guide cap 7 has its tip brought into contact with the surface of the object M to be observed so that the surface of the object M to be observed is aligned with the focus of the objective lens 10 of the optical system 5, and The irradiated light from the light source 6 is divided into incident light Ld and side light Ls.
, and transmitted light Lt to irradiate the object M to be observed, and is made of highly transparent synthetic resin such as acrylic resin (methacrylic resin). The front block 3 is screwed onto the tip of the front block 3 by a screw 13 formed at the rear portion 7r, and the above-mentioned focusing is performed in this screwed state. More specifically, it consists of a cylindrical rear part 7r and a hemispherical front part 7f, and a base end surface 14 is formed at the end of the rear part 7r, and the front part 7f has a small A through hole 15 is formed. The through hole 15 has a tapered shape, and its inner surface forms an inclined surface 16 at a predetermined angle (FIGS. 2 and 4).

Here, the above-mentioned side light Ls is caused by the irradiation light entering the solid interior of the light guide cap 7 from the proximal end surface 14 passing therethrough by total reflection and exiting from the inclined surface 16 of the through hole 15. The object M to be observed is irradiated approximately parallel to the front of the object M.
Further, the incident light Ld passes through the inner space of the light guide cap 7 and illuminates the observed object M from the front through the through hole 15, and the transmitted light Lt illuminates the observed object M from a portion other than the through hole 15. The transmitted light L is transmitted through the surface layer and then reflected within the surface layer to illuminate the surface layer from the inside.
t, and transmitted light Lt obtained from the irradiation light reflected on the inclined surface 16 of the through hole 15.

The light shielding body 8 has a rear part 8r having a cylindrical shape matching the inner surface shape of the light guiding cap 7, but a front part 8f having a shape that can close the through hole 15 of the light guiding cap 7 with its tip. It has a conical tube shape, and a lighting hole 17 is formed at its tip. The light guide cap 7 is assembled in such a manner that it can move relative to the light guide cap 7 as indicated by the arrows X and Y, and when moved in the direction of the arrow X, its tip closes the through hole 15 of the light guide cap 7. The incident light Ld and the side light Ls are cut off.

Specifically, a bracket protrusion 18 protruding from the side surface of the light shielding body 8 is engaged with an elongated support hole 19 formed on the side surface of the light guide cap 7, and the bracket protrusion 18 is connected to the operation ring 18r. , the light shielding body 8 can be moved as indicated by arrows X, , and Y via the operation ring 18r. Note that a spring 20 is installed between the light shielding body 8 and the light guiding cap 7.
is interposed, and the light shielding body 8 is always urged upward by the spring 20.

Since this front block 3 can be attached to and removed from the rear block 4, a plurality of specially designed ones are prepared in advance according to the magnification ratio and the type of object to be observed. It is possible to use them selectively.

The rear block 4 is an object to be observed M obtained by the optical system 5.
It incorporates an imaging means (CCD element) 22 that captures an enlarged image of the image, and a signal processing means 23 that processes signals from the imaging means 22. Further, this rear block 4 has a fitting tube 24 protruding from the front end surface for connecting the front block 3, and a cable 25 connected to the display means is led out from the rear end. Switch 2 for ON10 F F
6 is provided on the side surface, and a terminal 27 of the conducting wire from this switch 26 faces the front end surface, and is connected to a terminal 28 of the conducting wire from the light source 6 facing the rear end surface of the front block 3. ing.

To observe the object M using such a magnifying observation device, bring the objective 1 to the side of the object M, and if the object can be observed by contact, close the light guide cap of the object. It is only necessary to bring the tip of 7 into contact with the surface of the object M to be observed. If non-contact observation is required, the screwing state of the light guide cap 7 to the front block 3 is adjusted, and the light guide cap 7 is separated from the object M to be observed.

〔Effect of the invention〕

Since the magnifying observation device according to the present invention is as described above, it has the following effects.

(a) Since the light source and signal processing means are also built into the objective tool, the overall size is reduced and handling becomes easier.

(b) By dividing the objective into a front block and a rear block and allowing them to come into contact with each other and separate them, it is possible to simply replace the front block, which is specially designed in advance according to the magnification rate and the type of object to be observed. The necessary observations can be easily performed, making observation even easier.

(C) A light shield is provided inside the light guide cap, and this light shield can close the through hole of the light guide cap, so that incident light and side light can be cut and only transmitted light can be selected. This allows observation using transmitted light.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a schematic side view including a partial cross section of the objective of a magnifying observation device according to the present invention; FIG. 2 is a partial schematic cross sectional view of the tip of the objective; FIG. is a schematic plan view showing the relationship between the base end surface of the light guide cap and the light source, FIG. 4 is an enlarged sectional view of the vicinity of the through hole of the light guide cap, and FIG. 5 is an objective tool of a conventional magnifying observation device. FIG. 1-1--1 objective tool 3--1 front block 4--1 rear block 5--1 optical system 6--1 light source 7--1 Light guide cap 8 --- Light shielding body 14 --- Base end surface 15 --- One through hole 17 --- One lighting hole 22 --- One --- Imaging means 23 --- ------1 Signal processing means 5 diagram

Claims (1)

[Claims] In a magnifying observation device comprising an objective and a display means for displaying an enlarged image of an object to be observed obtained with the objective, the objective is a front block that can be brought into contact with and separated from the object. Divided into rear blocks, the front block is equipped with an optical system for enlarging the observed object and the light source for illuminating the observed object, and the rear block is equipped with an imaging means for capturing the enlarged image from the optical system and processing signals from the imaging means. A signal processing means for outputting to the display means is built in, and a transparent light guide cap having a hemispherical front part with a through hole formed in the center is connected to the tip of the front block. The proximal end surface of the cap is irradiated with light from the light source, and an opaque light shielding member having a lighting hole formed at its tip is disposed inside the light guiding cap, and the distal end of the light shielding member is is formed into a shape that allows the hole in the light guide cap to be closed, and the light shield is moved relative to the light guide cap so that the tip of the light shield selectively closes the hole in the light guide cap. A magnifying observation device characterized by being flexible.