JPH02264911A - Co-observing device - Google Patents

Abstract

PURPOSE:To constitute this device so that plural observers can observe the same visual field, and also, the magnification which each of them desires can be obtained independently by providing a control part for varying the magnification set by a sub-variable power mechanism so as to negate a magnification variation caused by a main variable power mechanism. CONSTITUTION:When a main observer 6 operates a main variable power operating part 11, a main variable power mechanism 2 is driven by a control part 13, and the observation magnification of the main observer 6 is varied by the magnification corresponding to the operation. Simultaneously, a sub-variable power mechanism 7 is driven so as to negate a magnification variation caused by an operation of the main variable power mechanism 2 by the control part 13, therefore, the observation magnification in a sub-observer 10 is not varied. In this case, when the sub-observer 10 operates a sub-magnification operating part 12, only the sub-variable power mechanism 7 is driven by the control part 13, and only the observation magnification of the sub-observer 10 is varied by the magnification corresponding to the operation. Accordingly, since the magnification which plural observers desire is obtained independently, an interruption of a surgical operation, etc., for readjusting the magnification are not required, and also, the same visual field is selected in each observer, and furthermore, since it is unnecessary to provide plural mirror bodies having the same variable power mechanism, which device is inexpensive.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shared viewing device that allows multiple observers to observe and photograph the same object.

[Conventional technology]

Examples of shared viewing devices that allow each observer to obtain the observation magnification desired when the same object is observed by multiple observers are disclosed in, for example, Japanese Patent Laid-Open No. 53-17353, U.S. Pat. No. 3,170,983, and No. 3186300
As described in the specification, a plurality of mirror bodies equipped with variable magnification mechanisms are arranged so that the same field of view can be observed, and each can change the magnification independently. As described in the publication, a main variable magnification mechanism is provided in the main observation optical path, and a sub-variable magnification mechanism is provided in the sub-observation optical path formed by dividing the main observation optical path after the main observation optical path. There is a system in which the observer changes the magnification using the main magnification mechanism, and then the sub-observer uses the auxiliary magnification mechanism to further change the magnification to the desired magnification.

[Problem to be solved by the invention]

However, in the former method, the dedicated space around the observer is large and tends to get in the way of the observer, and each mirror body is located at a certain angle in a different direction with respect to the viewing plane, so it is difficult to see the same image. There was a problem with not being able to see the field of view. Particularly in a surgical microscope, if the exclusive space around the observer is large, it is inconvenient that the surgeon has less freedom when performing a surgery together. Also, if a field of view cannot be obtained, some observers may not be able to observe the surgical site if it is deep and narrow. Furthermore, this system has the problem of being expensive because there are a plurality of mirror bodies each equipped with the same variable magnification mechanism.

On the other hand, the latter method is small and allows observation of the same field of view, but when the magnification of the main observation optical path changes due to the main variable magnification mechanism, the magnification of the sub-observation optical path also changes at the same time. There was a problem in that the magnification had to be changed again to the desired magnification using the variable magnification mechanism. Particularly with shared viewing devices such as surgical microscopes, if the magnification of the secondary surgeon changes due to the circumstances of the primary surgeon when performing a joint surgery, the surgery must be interrupted and the magnification adjusted again. Therefore, it is also very dangerous.

In view of the above-mentioned problems, the present invention has a small exclusive space around the observer, so it does not get in the way of the observer, and the same field of view can be obtained by multiple observers, so there is no need to worry about some observers being unable to observe during surgery. Since multiple observers can independently obtain the desired magnification, there is no need to interrupt surgery to readjust the magnification, and there is no need to provide main magnification mechanisms for multiple lens barrels. The purpose is to provide a public viewing device that is inexpensive.

[Means and effects for solving the problems] A shared viewing device according to the present invention includes a main variable magnification mechanism provided in the main observation/photographing optical path, and the main observation/photographing optical path is divided after the main variable magnification mechanism. In the common viewing device, the sub-magnification changing mechanism is provided in the sub-observation optical path formed by the above-described method, and a control unit is provided for changing the magnification of the sub-magnification changing mechanism so as to cancel the magnification change caused by the main magnification changing mechanism. As a result, the exclusive space around the observer is small, the same field of view can be obtained by multiple observers, the desired magnification can be obtained independently for each of the multiple observers, and the main variable magnification mechanism can be installed in multiple lens barrels. This eliminates the need to provide one.

〔Example〕

Hereinafter, the present invention will be described in detail based on the illustrated embodiments.

FIG. 1 is a schematic diagram of the optical system of the first embodiment.

l is an objective lens, 2 is a main variable magnification mechanism provided after the objective lens l, 3 is an optical path splitting element provided after the main variable magnification mechanism 2, and 4 is one optical path 5 divided by the optical path splitting element 3. A main eyepiece system provided above constitutes a main observation optical system facing the main observer 7. 7 is a sub-magnification mechanism provided on the other optical path 8 divided by the optical path splitting element 3; 9 is a sub-eyepiece system provided after the sub-magnification mechanism 7; these are the objective lenses 1. Main variable power mechanism 2. Together with the optical path splitting element 3, it constitutes a sub-observation optical system directed towards the sub-observer 10. Reference numerals 11 and 12 denote a main magnification changing operation section and a sub-magnification changing operation section consisting of a foot switch, a hand switch, etc., respectively.
and is connected to the sub-magnification mechanism 7. The control section 13 drives the main variable magnification mechanism 2 in response to a signal from the main variable magnification operation section 11, and also controls the sub variable magnification mechanism 7 so as to cancel out the change in magnification in the sub observation system caused by the variable magnification mechanism 2. Further, only the sub-magnification changing mechanism 7 is driven in response to a signal from the sub-magnification changing operation section 12.

Although only one main observation optical system and one sub-observation optical system are shown in FIG. 1, in the case of a surgical stereomicroscope, there are a pair of each. This embodiment is configured as described above, so that when the main observer 6 operates the main variable magnification operation section ll to change the observation magnification, the main variable magnification mechanism 2 is driven by the control section 13, and the operation is performed. The observation magnification of the main observer 6 changes by the magnification commensurate with the change in magnification.At this time, the observation magnification of the sub-observer IO is about to change as well, but at the same time, the control section 13 causes the sub-magnification mechanism 7 to change. It is driven so as to cancel the change in magnification caused by the operation of the magnification mechanism 2, and the observation magnification for the sub-observer 10 does not change.On the other hand, the sub-observer IO operates the lateral power operation unit 12 to change the observation magnification. Then,
Only the sub-magnification changing mechanism 7 is driven by the control unit 1.3, and only the observation magnification of the sub-observer 10 changes by a magnification commensurate with the operation, while the observation magnification of the main observer 6 does not change.

Therefore, according to this embodiment, since the magnifications desired by a plurality of observers can be obtained independently, there is no problem such as interruption of surgery to readjust the magnifications. Furthermore, since the same field of view can be obtained by multiple observers, there is no possibility that some observers will not be able to observe during the surgery. In addition, the exclusive space around the observer is small, so it does not get in the way of the observer.Furthermore, it is inexpensive because there is no need to provide a main variable magnification mechanism in a plurality of lens barrels.

FIG. 2 is a schematic diagram of the optical system of the second embodiment, in which a manual main drum-type variable magnification mechanism 14 and a sub-drum variable variable mechanism 14 are used instead of the main variable magnification mechanism 2 and the sub-magnification mechanism 7, respectively. Using the magnification mechanism 15, the main magnification changing operation section 11. Sub-magnification operation section 12. Control part 1
This embodiment differs from the first embodiment in that a control unit 16 is used instead of the controller 3, and the rest is the same as the first embodiment. The control unit 16 detects the operation of the main drum type variable magnification mechanism 14 and drives the sub drum type variable magnification mechanism 15 so as to cancel out the change in magnification in the sub observation system due to the operation. Furthermore, even if the sub-drum type variable power mechanism 15 operates, the main drum type variable power mechanism 14 is not affected.

Although only one main observation optical system and one sub-observation optical system are shown in FIG. 2, in the case of a surgical stereomicroscope, it is assumed that there are one pair each. Further, the main drum type variable magnification mechanism 14 and the sub drum type variable magnification mechanism 15 may be configured as units that can be inserted into and removed from the main observation optical system and the sub observation optical system, respectively.

Since this embodiment is configured as described above, the main observer 6
In order to change the observation magnification, the main drum type variable magnification mechanism 14
When the main observer 6 manually operates the
The observation magnification changes. At this time, the observation magnification of the sub-observer 10 is also about to change, but at the same time, the control unit
6 detects the operation of the main drum type variable magnification mechanism 14 and drives the sub drum type variable magnification mechanism 15 so as to cancel the change in magnification caused by the main drum type variable magnification mechanism 14, so the observation magnification for the sub observer IO is It does not change. On the other hand, when the sub-observer IO manually operates the sub-drum type variable magnification mechanism 15 to change the observation magnification, only the observation magnification of the sub-observer IO changes to the magnification commensurate with the operation, and the main observer 6 Observation magnification does not change.

Therefore, according to this embodiment, the same effects as in the first embodiment can be obtained, but the main drum-type variable magnification mechanism 14 and the sub-drum variable magnification mechanism 15 are used as the main observation optical system and the sub-observation optical system, respectively. If it is configured as a unit that can be inserted into and removed from an optical system, it can be attached to an existing or currently used microscope, so there is no need to buy a new mirror (it is economical).

Although not shown in the drawings, it goes without saying that in each of the embodiments, the main observation optical system and the sub-observation optical system may include a photographing optical system.

〔Effect of the invention〕

As mentioned above, the co-viewing device according to the present invention does not have the disadvantage of interrupting the surgery to readjust the magnification, does not cause an observer to be unable to observe during the operation, and does not interfere with the observer. , which has the important practical advantage of being inexpensive.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an optical system of a first embodiment of a public viewing device according to the present invention, and FIG. 2 is a schematic diagram of an optical system of a second embodiment. l... Objective lens, 2... Main variable magnification mechanism, 3... Optical path splitting element, 4... Main eyepiece system, 5, 8... Optical path, 6
. . . Main observer, 7 . . . Sub-magnification mechanism, 9 .
2...Sub-magnification operation unit, 13.16...Control unit, 14
...Main drum type variable power mechanism, 15...Sub-drum type variable power mechanism. In the specification of contents of the amendment, page 3, line 20 to page 4, line 1, and page 4, line 13, "main variable magnification mechanisms for multiple lens barrels" are specified for mirrors with the same variable magnification mechanism. Correct the body as plural 1. "Main Observer 7" in the third line of page 5 is corrected to "Main Observer 61." 4. Author (spontaneous) Invention of the specification of Japanese Patent Application No. 1-86638 dated May 24, 1999 A column for a detailed explanation of the invention in the specification. 6. Contents of the amendment (1) On page 7, lines 2 and 3 of the specification, "a main variable power mechanism for multiple lens barrels" has been changed to "a plurality of mirror bodies with the same variable power mechanism"
I am corrected.

Claims (1)

[Claims] A main variable magnification mechanism is provided in the main observation/photography optical path, and the
In a common viewing device including a sub-magnification changing mechanism in a sub-observation optical path formed by dividing a photographing optical path after the main magnification changing mechanism, A public viewing device comprising a control unit that changes the magnification by a sub-magnification mechanism.