JPH03139608A - Microscope device - Google Patents

Abstract

PURPOSE:To make an excellent image observation without any individual difference by providing an automatic aperture stop which limits illumination luminous flux and varying the diameter of the aperture stop, lens by lens. CONSTITUTION:The automatic aperture stop 12 which limits the illumination luminous flux is provided nearby an aperture stop 2 arranged on the optical axis behind a corrector lens 8 and a control means is equipped with a pulse transmitter 14 for informing a stepping motor 13 of which direction an objective 3 is moved in by a revolver 10 at the time of the operation of an objective lens change switch 11. For the purpose, the motion of the revolver 10 used when the objective lens 3 is moved is sent to the automatic aperture stop 12 to vary the diameter of the aperture stop 12 automatically according to the power of each objective lens 3. Consequently, even when the power of the objective lens 3 varies, an image can be observed in an excellent state at all times.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a microscope, and more particularly to a microscope device equipped with a mechanism for changing the magnification of an objective lens using a revolver equipped with a plurality of objective lenses. .

[Conventional technology]

A conventional microscope apparatus of this type will be described using a reflection metallurgical microscope as an example with reference to FIG.

FIG. 2 is a schematic configuration diagram of this conventional reflection type metallurgical microscope. In the figure, 1 is a light source lamp, 2 is an aperture diaphragm for restricting the illumination flux from the light source lamp 1 so as to satisfy the aperture angle of the objective lens described later, and 3 is a stop for enlarging the specimen 4. 5 is a stage on which the specimen 4 is placed, and 6 is an attitude handle for moving the stage 5 up and down to adjust the focus. Further, 7 is a half mirror for changing the optical path, 18 is a collector lens, 9 is an eyepiece for image observation, 10 is a revolver equipped with a plurality of objective lenses 3, and 111 is an objective for switching the objective lens 3 to be used. This is a lens changeover switch. Note that 15a and 15b are reflecting mirrors.

In the microscope with such a configuration, the light emitted from the light source lamp 1 is passed through the collector lens 8. A sample 4 placed on a stage 5 is illuminated by a half mirror 7 through an aperture diaphragm 2.

Then, the reflected light from the specimen 4 is transmitted through the objective lens 3. It enters the observer's eye through the half mirror 7, the reflecting mirrors 15a and 15b, and the eyepiece 9, allowing him to see an enlarged image of the specimen.

Furthermore, when it is desired to change the size of the specimen 4 for observation, when the objective lens exchange switch 11 is pressed, the revolver 10 rotates and the objective lens 3 is exchanged. At this time, if the diameter of the aperture diaphragm 2 is changed, a good image can be observed.

[Problem to be solved by the invention]

Conventional microscope equipment is configured as described above.
In order to observe a good image, the aperture diaphragm 2 should be adjusted to the objective lens 3.
It is necessary to aperture the aperture to about 70 to 80% of the pupil size to cut out excess light, and for this purpose, the observer must adjust the magnification of the objective lens (the size of the pupil of the objective lens) every time the objective lens magnification changes. There was a problem that it had to be done.

The present invention was made to solve the above problems, and the magnification of the objective lens (the size of the pupil of the objective lens)
To obtain a microscope device capable of always observing images in a good condition even if the image changes.

[Failure to solve the problem]

The microscope device according to the present invention is provided with an automatic aperture diaphragm on the axis of the luminous flux emitted from the light source to limit the illumination luminous flux, and transmits the movement of a revolver to the aperture diaphragm to adjust the diameter of the aperture diaphragm. A control means is provided that automatically changes the magnification according to the magnification of the objective lens.

[Effect]

In the microscope apparatus according to the present invention, the control means varies the diameter of the automatic aperture diaphragm according to the magnification of the objective lens, and causes an illumination light beam corresponding to the objective lens to enter the objective lens.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a schematic diagram of a reflection type metallurgical microscope with automatic opening and aperture according to an embodiment of the present invention. The difference between this embodiment and the conventional example shown in FIG. 2 is that an automatic aperture diaphragm 12 is provided near the aperture diaphragm υ2 located on the optical axis behind the collector lens 8 to limit the illumination light flux. A stepping motor 13 moves this automatic aperture diaphragm 12, and a stepping motor 13 detects in which direction the objective lens 3 moves by means of a revolver 10 when the objective lens exchange switch 11 is operated.
By providing a control means having a pulse transmitter 14 for transmitting the movement to the automatic aperture diaphragm 12, the movement of the revolver 10 used when changing the objective lens 3 is transmitted to the automatic aperture diaphragm 12, and the diameter of the aperture diaphragm 12 is changed at each time. The magnification of the objective lens 3 is automatically changed according to the magnification of the objective lens 3. In the drawings, the same reference numerals indicate the same or corresponding parts.

According to the microscope configured in this way, light emitted from the light source lamp 1 passes through the collector lens 8. Open and closed 2. It passes through the automatic opening aperture p12, is reflected by the half mirror 7, and illuminates the specimen 4 placed on the stage 5 via the objective lens 3. Therefore, the light from the specimen 4 is transmitted through the objective lens 3. Eyepiece9. It passes through the half mirror 7 and the reflecting mirrors 15a and 15b and enters the observer's eyes, allowing him to see an enlarged image of the specimen as in the conventional case. Further, when the objective lens exchange switch 11 is pressed in order to change the magnification of the objective lens 30, a pulse is transmitted from the pulse transmitter 14, and the stepping motor 13 is operated by the pulse output. Therefore, it is possible to move the automatic aperture diaphragm 12 to a preset circle diameter that is optimal for observing an image with the objective lens 3 in use. At this time, if the aperture diaphragm needs to be finely adjusted, it can also be done using the aperture diaphragm 2.

In addition, although the above-mentioned example showed the case where it was applied to a reflective metallurgical microscope, the present invention is not limited to this, and it goes without saying that it can be applied to various types of microscopes.

〔Effect of the invention〕

As described above, according to the microscope apparatus of the present invention, an automatic aperture diaphragm that limits the illumination light flux is provided, and the diameter of this aperture diaphragm is
The aperture diaphragm is configured to change depending on the objective lens used so that a good image can always be obtained, so the observer does not have to adjust the aperture diaphragm every time the objective lens is changed, allowing good image observation regardless of individual differences. effective.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a microscope apparatus with an automatic aperture diaphragm υ according to one embodiment of the present invention, and FIG. 2 is a schematic diagram of a reflection metallurgical microscope according to a conventional example. 1...Light source lamp, 2...Aperture diaphragm υ, 3...
・Objective lens, 4...specimen, 5...life/stage,
6... attitude handle, 7. O... half mirror - 18
・O...Corrector lens, 911611@eyepiece, 10000. Revolver 110...Objective lens exchange switch, 12...Automatic aperture diaphragm, 13...Stepping motor, 14...Pulse transmitter.

Claims (1)

[Claims] In a microscope device equipped with a mechanism in which a revolver equipped with multiple objective lenses is operated by an objective lens exchange switch to change the magnification of the objective lenses, an automatic device that limits the illumination light flux emitted from the light source onto the axis of the light flux. A microscope apparatus comprising: an aperture diaphragm; and a control means for detecting movement of the revolver and automatically varying the diameter of the aperture diaphragm in accordance with the magnification of the objective lens.