JPH0357451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an observation device used in a microscope or the like, which is capable of observing a wide range of materials.

When observing materials using a microscope, bring the area you want to observe to the center of your field of view. In this way, to bring the material to the center of the field of view, or to move the material sequentially to the center of the field of view when observing a large material in its entirety, we use a cruciform stage, a rotatable stage, or a stage that can be moved to any position. There are stages that can be moved by sliding. In addition, when the amount of movement is large, such as in a surgical microscope, there is also a microscope in which the entire microscope is attached to a large stand so that it can be moved. However, in the case of examination using a stereomicroscope, for example, there are cases in which objects with large volumes and weights are to be observed, and it may not be possible to use them on a normal stage. Another problem is that it is too large to use a stand.

The present invention provides an observation device in which two prisms each having two reflective surfaces are rotatably arranged in an observation optical path, making it possible to observe a wide range of a large object without moving the observation object. It is something.

The detailed content of the present invention will be explained below based on an example applied to a binocular stereomicroscope. In FIG. 1, 1 is an eyepiece lens, 2 is a barrel prism, and 3 is an objective lens, which constitute a well-known binocular stereomicroscope. 7 is the first lens placed in front of the microscope objective lens.
The prism has reflective surfaces 7a and 7b and an optical axis 6.
(Optical axis 4 of the left and right objective lenses of the binocular stereomicroscope,
5) so as to be able to rotate around the center. A second prism 8 has reflective surfaces 8a and 8b and is arranged so as to be rotatable about an optical axis 6'.

In the optical system in which the two prisms 7 and 8 are arranged in front of the objective lens, the light from the object at the point 10 on the object 9 is reflected by the surfaces 8a and 8b of the second prism 8, and further The light is reflected by the surfaces 7a and 7b of the first prism 7 and enters the objective lens for observation. Here, when the first prism 7 and the second prism are rotated together around the optical axis 6, the observation point is a point on the circumference whose radius is the distance to the object point 10, centered on the point 11 on the specimen surface. It is. Also, if the second prism 8 is rotated around the optical axis 6' relative to the first prism 7, the point 12 becomes the center and the point 1 becomes the center.
The circumference of the circle whose radius is the distance to 0 is observed.
Therefore, rotation of the first prism 7 and the second prism 8 as a unit around the optical axis 6,
A wide range of observation is possible by combining the rotation of only the second prism about the optical axis 6'.
For example, as shown in FIG. 2, the first prism 7 is rotated around the optical axis 6 as 7', and the second prism 8 is rotated around the optical axis 6' (because the first prism is rotated, the optical axis 6' has been moved to the position shown in Figure 3) and rotate it around 8' to obtain 1.
The object point at position 0' will be observed. In this way, by changing the rotation angles of the first prism and the second prism, points within an arbitrary wide range can be observed.

As explained above, according to the observation apparatus of the present invention, a wide range of objects can be observed without moving the object with an extremely simple configuration in which two prisms are rotatably arranged in the optical path of the observation system. Therefore, even if the object is large and heavy, it is extremely effective because the object can be observed by simply rotating the prism without moving the object.

Although the case where the present invention is applied to a binocular stereoscopic microscope is shown as an example, it can also be applied to a general microscope and other optical devices.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an optical system of an embodiment in which the device of the present invention is applied to a stereoscopic microscope, and FIG. 2 is a diagram showing the relationship between a prism used in the present invention and an observation object point. 1...eyepiece, 2...lens barrel prism, 3...
...Objective lens, 6, 6'...Optical axis, 7...First
prism, 8... second prism.

Claims (1)

[Claims] 1. A first prism and a second prism each having two reflective surfaces are placed in the observation optical path from the observation side, and after light from the observation object is sequentially reflected by each of the reflective surfaces of the second prism. In the observation device, the first prism has an optical system that emits light, enters a first prism, is sequentially reflected by its respective reflecting surfaces, and then exits and enters an observation system.
The second prism is rotatable around the optical axis that outputs the second prism and reaches the observation system, and the second prism rotates around the optical axis that outputs the second prism and enters the first prism. Rotatable against the
An observation device characterized in that both the optical axes and the optical axis of incidence on the second prism are configured to be parallel to each other, so that a wide field of view on the same observation plane can be observed.