JP2600573Y2 - Filter block - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter block which can be used in an epi-illumination device for observing epi-illumination and holds a dichroic mirror and a plurality of types of optical filters.

[0002]

2. Description of the Related Art In recent epifluorescence observations, one specimen is often subjected to a plurality of stains and observed under a microscope or photographed. In the case of such observation, it is necessary to select excitation light having an appropriate wavelength depending on the type of staining.
Therefore, the examiner needs to appropriately replace the dichroic mirror to be used with a dichroic mirror having spectral characteristics suitable for observation.

FIG. 4 shows an example of the configuration of a filter block used for incident fluorescence observation.

The filter block shown in FIG. 1 has a two-body structure including a mount member 10 attached to the microscope main body and a mirror member 11 housed in the mount member. The lower end surface of the mount member 10 is open, and a fixed diaphragm plate 12 is screwed to the opening. Further, openings are formed on the observation optical axis on the side surface and the upper end surface of the mount member 10, respectively, and hold the excitation filter 13 and the absorption filter 14, respectively.

The mirror member 11 has an optical path penetrating from the opening of the fixed diaphragm plate 12 to the opening of the excitation filter 13 at the center thereof, and is inclined at an angle of about 45 degrees with respect to the incident light from the excitation filter 13. An application surface 16 is formed. One surface of the dichroic mirror 17 (opposing surface of the reflecting surface) is applied to the applying surface 16,
The mirror frame 18 is pressed from the reflection surface 17 a side by the mirror frame 18, and the mirror frame 18 is fixed to the mirror member 11 by fixing screws 19.

In the above-described filter block, the reflection surface angle of the dichroic mirror 17 is adjusted by the extension screw 21 and the tension screw 22. When replacing the dichroic mirror 17, the fixing screw (not shown) of the fixed diaphragm plate 12 is removed, and then the fixing screw 19 is loosened to release the pressing and fixing of the dichroic mirror 17. Then, the dichroic mirror 17 is replaced.

FIGS. 5 and 6 show other examples of the configuration of the filter block.

This filter block has a two-body structure of a mount member 23 and a mirror member 24, similarly to the above, but the mount member 23 holds only the absorption filter 25 and the mirror member 24 An excitation filter 26 and a dichroic mirror 27 are held.

The mount member 23 has a mount 28 formed on one side for mounting to the microscope body. The mirror member 24 has a contact surface 29 for holding the dichroic mirror 27 at an angle of 45 degrees with respect to the incident light from the excitation filter 26. Dichroic mirror 2
7 is fixed to the contact surface 29 of the mirror member 24 by a screw 30, and the screw 30 is further fixed by an adhesive.

In the above-described filter block, the angle of the dichroic mirror 27 is adjusted by the tension screw 31 and the extension screw 32.
Adjust with.

[0011]

However, each of the above-described filter blocks has the following problems. That is, since the mount member and the mirror member have a separate structure in each filter block, it is necessary to adjust the angular accuracy of the reflection surface of the dichroic mirror after the mount member is attached to the microscope body or the like. In addition, in order to achieve high accuracy for all of the mount member and the mirror member, the cost of parts and the cost of assembly are high, resulting in an increase in cost.

In the filter block shown in FIG.
In a state where the dichroic mirror 17 is housed inside the mount member 10 (the dichroic mirror 17 is not exposed to the outside just by removing the fixed diaphragm plate 12), the replacement operation must be performed, and the workability is poor.

In the filter blocks shown in FIGS. 5 and 6, since the dichroic mirror 27 is screwed to the mirror member 24 and further fixed with an adhesive, it is difficult for the user to replace only the dichroic mirror 27 by himself. Met.

The present invention has been made in view of the above circumstances, and provides a filter block which does not require an adjustment work for obtaining the angular accuracy of a dichroic mirror and facilitates the work of replacing the dichroic mirror. With the goal.

[0015]

In order to achieve the above object, a filter block according to the present invention has a reference mounting surface.
A mirror mounting seat forming a mounting mount;
It is formed integrally with the seat and has a predetermined
Attach the dichroic mirror at an angle
A mirror mounting portion for the mirror mounting portion,
Mirror that presses and fixes the dichroic mirror so that it can be exchanged
Holding member, the dichroic mirror and the mirror
The dichroic mirror is provided between the
An elastic member for pressing in the direction of the mirror holding member;
The filter is formed detachably with respect to the mirror mounting seat.
And a filter mounting seat for mounting the filter .

[0016] The filter block of the present invention comprises
The mirror holding member is reflected by the dichroic mirror.
The configuration has a fine adjustment screw for adjusting the angle .

[0017]

[Function] In the filter block of the present invention, the mounting reference surface
Dichroic mirror so that it makes a certain angle with respect to
Mount the mirror mounting part on which the
It is formed integrally with the mirror mounting seat that has formed the und
At the same time, the mounting mount and the mirror mounting part can be
It can be processed and the angle of the reflection surface of the dichroic mirror
Accuracy can be ensured for individual parts. In addition, dichroic
The elastic member located between the mirror and the mirror mounting part
Dichroic mirror moves toward mirror holding member
Pressed, the die is adjusted by adjusting the mirror holding member.
The angle of reflection of the croic mirror can be adjusted.
Also, conventionally, after mounting the mounting member on the microscope body, etc.,
The required dichroic mirror angle adjustment work
It becomes important.

[0018] Further , the filter is attached to the mirror mounting seat.
Since the seat is configured to be detachable, the filter
When the mounting seat is removed, the dichroic mirror becomes larger outside.
It is exposed and the mirror replacement work becomes easy.

The mirror holding member of the present invention is a die holding member.
Fine adjustment screw to adjust the reflection angle of the Croic mirror
, So it is also suitable for highly accurate adjustment of the mirror reflection angle.
I can respond.

[0020]

Embodiments of the present invention will be described below.

1 to 3 show the configuration of a filter block according to an embodiment of the present invention. The filter block of the present embodiment includes a mirror mounting seat 41 and a filter mounting seat 42, both of which can be divided.

A female dovetail 43 having a mounting reference surface 43a serving as a mounting mount is formed on one side surface of the mirror mounting seat 41 in parallel with the observation optical axis. In the mirror mounting seat 41, a mounting portion for mounting an absorption filter 44 serving as a first filter and a mounting portion for mounting a dichroic mirror 45 are formed in the respective openings on the observation optical axis. .

A mounting portion for mounting the absorption filter 44 is provided at an opening on the upper surface of the mirror mounting seat 41. In this mounting portion, a filter frame 47 in which the absorption filter 44 is fitted is fixed to the mirror mounting seat 41, and a pressing ring 48 is fixed to the outer periphery of the upper surface of the absorption filter 44 fitted in the filter frame 47.

A mounting portion for mounting the dichroic mirror 45 is provided on a tapered surface 49 which is formed by cutting diagonally from near the upper surface of the mirror mounting seat 41 to the lower surface. One opening of the observation optical axis is opened at the center of the tapered surface 49, and a pair of mirror pressing springs 51 are arranged on the outer periphery of the opening. The dichroic mirror 45 is overlapped on the tapered surface 49 so as to sandwich the mirror pressing spring 51. The tapered surface 49 is set at 45 degrees with respect to the mounting reference surface. With both sides of the dichroic mirror 45 sandwiched between the mirror pressing members 52, the mirror pressing members 52 are fixed to the mirror mounting seat 41 with fixing screws 53. The mirror pressing spring 51 presses the dichroic mirror 45 toward the mirror pressing member 52 by its restoring force. Screw holes 54 for inserting fine adjustment screws are provided at two upper and lower positions in the pair of mirror holding members 52, respectively. Positioning holes 55a and 55b are formed on both sides of the lower end of the mirror mounting seat 41.

On the other hand, the filter mounting seat 42 has a lower surface having the same shape as the upper surface of the mirror mounting seat 41 and has a tapered surface 4.
9 has a fitting surface to be fitted. An opening 56 is formed on the lower surface of the filter mounting seat 42 at the position of the observation optical axis, and a mounting portion for mounting an excitation filter 57 as a second filter is formed on a side surface perpendicular to the lower surface.

The mounting portion for mounting the excitation filter 57 includes a filter frame 58 in which the excitation filter 57 is fitted, and a press ring 59 for pressing the excitation filter 57 fitted in the filter frame 58.

On the lower surface of the filter mounting seat 42, positioning projections 60 are provided on both sides. The fitting surface of the filter mounting seat 42 was fitted to the tapered surface 49 of the mirror mounting seat 41, and the projections 60 of the filter mounting seat 42 were inserted into the positioning holes 55 a and 55 b of the mirror mounting seat 41, whereby both were positioned. It fits in a state.

The mirror mounting seat 41 and the filter mounting seat 42 are formed with screw holes 61 and 62 at positions corresponding to each other, and both can be fixed by fixing screws 63.

In this embodiment constructed as described above, the dichroic mirror 45 and the absorption filter 44 are mounted on the mirror mounting seat 41 having the reference mounting surface 43a, and the excitation filter 57 is mounted on the mirror mounting seat 41. The mounted filter mounting seat 42 is mounted.

When such a filter block is mounted on, for example, a microscope main body, the female dovetail 43 of the mirror mounting seat 41 is fitted to a male dovetail having a mounting reference surface of the microscope main body, so that the tapered surface 49 moves with respect to the mounting reference surface. Since the angle is set to 45 degrees, the dichroic mirror 4 can be adjusted without adjusting the angle of the reflecting surface of the dichroic mirror 45.
5 are arranged with sufficient reflection angle accuracy with respect to the observation optical axis.

This is because the female dovetail 43 having the reference mounting surface on the mirror mounting seat 41 and the dichroic mirror 45 are mounted on the mirror mounting seat 41 and the tapered surface 49 is formed in a single component, so that the angular accuracy of the mirror reflecting surface can be ensured as a single component. is there. Therefore, in this embodiment, the tapered surface 49 to which the dichroic mirror 45 is attached is machined on the basis of the female dovetail 43 at the machining stage of the mirror attachment seat 41, and the dichroic mirror 4
The mirror reflection angle accuracy when the mirror 5 is mounted is sufficient.

The above-mentioned fine adjustment screw is used in order to obtain a more accurate angle accuracy of the mirror reflecting surface. That is, the fine adjustment screw inserted into each screw hole 54 of the pair of mirror holding members 52 is adjusted, and the mirror holding member 5 is adjusted.
The angle of the contact surface with the second tapered surface 49 is adjusted.

Next, the replacement operation of the dichroic mirror will be described.

The fixing screw 63 is removed from the state shown in FIG. 2, and the filter mounting seat 42 is attached to the dichroic mirror 45.
To separate them from each other. When the filter mounting seat 42 is separated from the mirror mounting seat 41, the dichroic mirror 4 is attached to the tapered surface 49 of the mirror mounting seat 41.
5 appears in a state as shown in FIG. Mirror mounting seat 41
Are cut in accordance with the position of the reflecting surface of the dichroic mirror 45, so that it is easy to approach the mirror pressing member 52. Next, the mirror holding member 52
Loosen the fixing screw 53 fixing the. Alternatively, the fixing screw 53 is removed. When the pressing by the mirror pressing member 52 becomes loose, the pressing force by the mirror pressing spring 51 becomes weak, and the dichroic mirror 45 can be easily taken out.

Next, dichroic mirrors having different optical characteristics are mounted on the mounting portion of the mirror mounting seat 41. In mounting the dichroic mirror, the surface on the opposite side of the reflection surface is overlapped with the mirror pressing spring 51, and the reflection surface side is used as a surface to be applied to the mirror pressing member 52. By using the mirror reflecting surface as the surface to be applied to the mirror pressing member 52, there is an advantage that the mirror is not affected by the wedge angle of the mirror itself.

Next, both sides of the dichroic mirror are sandwiched between a pair of mirror pressing members 52 and fixed with fixing screws 53. At this time, since both side walls of the mirror mounting seat 41 are cut in accordance with the position of the reflecting surface of the dichroic mirror 45, the replacement work is not hindered.

Next, the positioning projection 60 of the filter mounting seat 42 and the positioning hole 55 of the mirror mounting seat 41 are aligned with each other.
The filter mounting seat 42 is slid in the direction of the observation optical axis and fitted into the mirror mounting seat 41. In this state, the fixing screw 63
From the screw hole 62 of the filter mounting seat to the mirror mounting seat 42.
And the filter mounting seat 42 is fixed to the mirror mounting seat 41. With the above operation, the mirror replacement operation is completed.

As described above, according to this embodiment, since the reflection angle accuracy of the dichroic mirror 45 can be obtained with the component accuracy, the operation of adjusting the reflection angle of the dichroic mirror 45 becomes unnecessary, and the operability is improved. Can be. In addition, highly accurate adjustment of the mirror reflection angle can be handled. High processing and assembling accuracy for the entire part required for obtaining the accuracy of the mirror reflection angle is reduced, so that the cost can be reduced.

Further, since the dichroic mirror 45 is fixed without using an adhesive, only the dichroic mirror 45 can be replaced, and the side wall of the mirror mounting seat is cut in accordance with the position of the reflecting surface of the dichroic mirror 45. Therefore, there is an advantage that the replacement work is simplified.

Since the filter mounting seat 42 is not required to have such a high precision in function, plastic or the like can be used as the material. If such a material is used, the cost can be reduced. Further, as a fixing structure of the filter mounting seat 42, one that engages in a hook manner by utilizing elastic force of plastic or the like can be considered.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

[0042]

As described above in detail, according to the present invention, it is possible to provide a filter block which eliminates the need for an adjustment work for obtaining the angular accuracy of the dichroic mirror and facilitates the work of replacing the dichroic mirror. In addition,
It is also possible to cope with high-precision adjustment of the angle of reflection.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filter block according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the filter block shown in FIG.

FIG. 3 is a diagram showing an arrow B in a state where a filter mounting seat is removed from the filter block shown in FIG. 1;

FIG. 4 is a sectional view of a conventional filter block.

FIG. 5 is a sectional view of another conventional filter block.

FIG. 6 is an exploded perspective view of the filter block shown in FIG.

[Explanation of symbols]

41: mirror mounting seat, 42: filter mounting seat, 43 ...
Female ants, 44: absorption filter, 45: dichroic mirror, 49: tapered surface, 51: mirror pressing spring, 5
2 ... mirror pressing member, 57 ... excitation filter.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 7/00 G02B 7/198 G02B 21/06

Claims (2)

(57) [Scope of request for utility model registration] 1. A filter block for holding an optical element such as a dichroic mirror or a filter in an optically positioned state, wherein a mirror mount having a mounting reference surface is formed.
And the mirror mounting seat are formed integrally with the mirror mounting seat.
The dichroic mirror so as to make a predetermined angle
A mirror mounting portion for mounting a mirror, and the dichroic mirror with respect to the mirror mounting portion.
A mirror pressing member for pressing and fixing exchangeably , between the dichroic mirror and the mirror mounting portion;
The dichroic mirror is provided to hold the mirror
An elastic member that presses in the direction of the member ;
A filter mounting seat for mounting a filter.
A filter block characterized by the following. 2. The mirror holding member according to claim 1 , wherein
Equipped with a fine adjustment screw to adjust the reflection angle of the
Filter block according to claim 1, characterized in that it.