CN204613503U - Lighting device and stereomicroscope - Google Patents

Abstract

The utility model relates to the improvement of a lighting device of a stereo microscope. The utility model proposes an illuminating device, comprising: an illuminating group, the illuminating group provides illuminating light to the specimen, and the illuminating group is fixedly connected to a rotating mechanism; a rotating mechanism is fixed on the moving mechanism, and the rotating mechanism makes the The lighting group changes different lighting angles; a moving mechanism is fixed on the fixing part, and the moving mechanism makes the lighting group change different lighting heights; a fixing part is fixed on the frame and goes up and down together with the frame Movement; the lighting group makes the lighting height and/or lighting angle of the lighting group continuously adjustable by means of the rotating mechanism and the moving mechanism. The utility model also proposes a stereomicroscope, comprising: an eyepiece, a zoom body group, a focusing mechanism, a mirror frame, a base and the above-mentioned lighting device. The utility model is used in a stereo microscope to realize oblique bright-field illumination, oblique oblique illumination or oblique dark-field illumination for a sample.

Description

Lighting device and stereo microscope

technical field

The utility model relates to a stereo microscope, in particular to the improvement of its illuminating device.

Background technique

Epi-illumination, also known as reflected illumination, refers to an illumination that illuminates objects from the direction of the objective lens and uses reflected light to form images. It is suitable for the observation of non-transparent specimens. There are two main types of epi-illumination: one is coaxial illumination, and the direction of the illumination beam is consistent with the optical axis of the microscope objective lens, so as to achieve good observation of highly reflective specimens; the other is oblique illumination, and the direction of the illumination beam is aligned with the optical axis of the microscope. At a certain angle, high-resolution and high-contrast observation of specimens can be achieved.

In DE102005036230B3 a stereomicroscope with epi-illumination is described. There are multiple LEDs distributed on the arc-shaped arm of the stereo microscope. The LEDs can provide illumination individually or together. When the LEDs in the vertical position are used independently, they can provide bright field illumination, and some LEDs along the arc can provide One oblique lighting (angle range from 5° to 105°). Since this reflective lighting device is installed on a fixed vertical arm position, each can only provide a fixed-angle beam, and the flexibility of beam adjustment is poor. In order to achieve different oblique effects, the demand for LEDs will increase. The more complex the control circuit, the higher the cost, and even in this case, it is impossible to achieve continuous change of the viewing angle.

In CN101055346A, referring to Fig. 1 and Fig. 2 provided by this patent, a dark-field stereo microscope using a side-illuminated illumination method is described. In this method, the light source is placed on the side of the microscope stage, and the light beam emitted by the light source is in the same plane space as the specimen and the included angle with the optical axis is 80° to 100°, so as to realize the oblique dark field illumination of the specimen observe. This lighting method can only provide dark field lighting, and the lighting angle is not adjustable, so the applicability is single.

In U.S.Pat.No.8331020B2, an epi-illumination device is described, which uses a plurality of point light sources to be arranged on a carrier element, and then three carrier elements are placed on a holder whose plane is perpendicular to the optical axis. The front part of the holder is arc-shaped and there are 2 arc-shaped guide ports on both sides directly above, and a carrier element is fixed in the middle of the arc-shaped part of the holder, and the remaining 2 carrier elements are distributed on both sides and can move along the arc-shaped guide ports, so that they can be used alone One or more groups of point light sources can achieve the purpose of observing specimens from different angles. This solution can meet the observation of the specimen from different angles within the plane displacement, and can realize the observation of different sides of the specimen, but it cannot satisfy the illumination of the specimen at different angles at the free height to achieve various observation effects.

In U.S. Pat. No. 5038258, a reflective bowl-type epi-illumination device used by a stereo microscope is described. The reflective bowl is placed perpendicular to the optical axis, narrow at the top and wide at the bottom, and the inner wall of the reflective bowl is evenly distributed in a ring shape. Multiple LEDs, so that the LEDs distributed in different rings on the inner wall of the reflective bowl will have a small and different angle with respect to the optical axis, so that the observation of the specimen under different light intensities from multiple angles can be realized. However, such a lighting device means that as the viewing angle increases, the number of LEDs must increase, and the size of the corresponding reflective bowl also needs to increase. With the increase in the number of LEDs, the control circuit becomes more complicated and the cost increases. Moreover, the illumination angle range of this epi-illumination device is limited, and continuous change of observation contrast cannot be realized.

In CN 1292286C, referring to Fig. 4, Fig. 7 and Fig. 16 provided by this patent, an epi-illumination device is described. A plurality of light-emitting secondary lights, substrates and diffusion devices are placed in the concave frame body, and then the concave frame body is fixedly connected with the mirror frame, thus forming this epi-illumination device. Since it is fixed on the frame of the microscope, its illumination angle is not adjustable, and it can only achieve oblique illumination of the specimen.

Utility model content

The purpose of this utility model is to provide a lighting device for a stereomicroscope, by freely adjusting the position of the lighting group, a large range of lighting angle changes can be realized, and oblique bright field illumination\oblique oblique illumination\of the specimen can be realized Oblique dark field illumination can realize the continuous change of observation contrast.

Another object of the present invention is to provide an illuminating device for a stereo microscope, which has a simple structure, strong operability and low cost.

Another purpose of the present utility model is to provide an illuminating device for a stereomicroscope, which has strong versatility, and can be applied to the observation of solid-phase specimens and also applicable to the observation of liquid-phase specimens.

Therefore, the utility model proposes a lighting device, including: a lighting group, the lighting group provides illumination light of the required angle, required brightness and required range to the specimen, the lighting group is fixedly connected to a rotating mechanism; a rotating mechanism, fixed On a moving mechanism, the rotating mechanism makes the lighting group change different lighting angles; a moving mechanism is fixed on a fixing piece, and the moving mechanism makes the lighting group change different lighting heights; a fixing piece is fixedly installed On the mirror frame, it moves up and down together with the mirror frame; the illumination group makes the illumination height and/or illumination angle of the illumination group continuously adjustable through the rotating mechanism and the moving mechanism, so as to realize oblique bright field illumination, oblique deflection Oblique or oblique darkfield illumination.

Thus, the utility model proposes a stereomicroscope, including: eyepiece, zoom body group, focusing mechanism, mirror frame, base and lighting device, the base is used to place the specimen to be observed, and the lighting device is as described above lighting fixtures.

The lighting device provided by the utility model enables the lighting group to change different lighting heights through the movement mechanism, and at the same time, in addition to moving up and down itself, it can also move up and down together with the focusing mechanism of the mirror frame, and through the rotating mechanism to make the lighting The different illumination angles of the illumination group are changed, and the illumination group is used to provide the specimen with the illumination light of the required angle, required brightness and required range; thus the illumination height and/or illumination angle of the illumination group are continuously adjustable, thereby realizing oblique bright field illumination, Oblique oblique illumination or oblique darkfield illumination.

Because the stereo microscope is easy to affect the contrast of imaging due to the influence of non-working high-order diffracted light and stray light when observing in dark field. In the utility model, since the illuminating device can move up and down in a large range, the angle of the illuminating light can be adjusted and increased, and the high-order diffracted light cannot enter the objective lens system. The height of the specimen is not high, so that the space debris above the specimen is less likely to be illuminated, so that the stray light is also smaller, thereby improving the dark field contrast.

Description of drawings

Fig. 1 is the schematic diagram of the first embodiment of the utility model in stereomicroscope illumination;

Fig. 2 is a partial sectional view of the first embodiment of the utility model in stereomicroscope illumination;

Fig. 3 is a composition diagram of the lighting device of the first embodiment;

Fig. 4 is a cross-sectional view of the lighting device of the first embodiment;

Fig. 5 is a schematic diagram showing the second embodiment of the present invention in stereomicroscope illumination;

Fig. 6 is a composition diagram of the lighting device of the second embodiment;

Fig. 7 is a sectional view of the lighting device of the second embodiment;

Fig. 8 is a schematic diagram showing the third embodiment of the present invention in stereomicroscope illumination;

Fig. 9 is a composition diagram of the lighting device of the third embodiment;

Fig. 10 is a cross-sectional view of the lighting device of the third embodiment;

Fig. 11 is a composition diagram of the lighting device of the fourth embodiment.

Detailed ways

In order to further illustrate various embodiments, the utility model provides accompanying drawings. These drawings are part of the disclosure content of the present invention, which are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and advantages of the present utility model. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components.

The utility model is further described now in conjunction with accompanying drawing and specific embodiment.

A first embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 1 is a schematic diagram of the lighting device in a stereo microscope, Fig. 2 is a partial sectional view of the lighting device in a stereo microscope, Fig. 3 is a composition diagram of the lighting device, and Fig. 4 is a sectional view of the lighting device. The stereomicroscope of this embodiment is similar to conventional stereomicroscope structure, all comprises: eyepiece, zoom body group, focusing mechanism 14, mirror frame 15, base 12 and illuminating device, be used to place the specimen that is observed on the base 12 , the difference lies in the structure of the lighting device. The lighting device of this embodiment is mainly composed of three parts: an up and down movement mechanism 21 , a rotation mechanism 22 , and a lighting group part 23 . As shown in Fig. 1 and Fig. 2, the up and down movement mechanism 21 of the illuminating device is fixed on the fixing part, and the fixing part is fixedly connected with the mirror frame 15 in the microscope, that is, the focusing mechanism 14 (rotating the focusing hand) can wheel set), so that the illuminating device and the mirror frame 15 move up and down along the vertical arm 13 together. At the same time, the illuminating device slides up and down relative to the frame 15 through the up and down movement mechanism 21, and uses the rotating mechanism 22 to rotate the illuminating group 23 into different illuminating angles. On the specimen, it enters the viewer's field of view through the head 11 (eyepiece, zoom group) of the microscope through reflection.

Specifically, in this embodiment, the up and down movement mechanism 21 is realized by using a slide rail structure. Referring to Figure 2 and Figures 3 and 4, the slide rail structure mainly includes a slide block 31 and a slide rail seat 37 having a sliding groove 371, and the slide rail seat 37 is also the fixing member of this embodiment, And it is fixedly connected to the mirror frame 15 below. The slide rail seat 37 can be fixedly connected under the mirror frame 15 (located in the vertical arm 13 ) by means of screws or welding, or can be directly formed as a part of the mirror frame 15 extending downward. A slide block 31 is movably arranged on the slide groove 371 of the slide rail seat 37, and the slide block 31 can slide relatively along the slide groove 371 of the slide rail seat 37, thereby forming a linear up and down movement mechanism.

In this embodiment, the chute 371 of the slide rail seat 37 adopts a "V"-shaped guide rail, and the corresponding track matching portion 31a of the slider 31 is also a corresponding "V"-shaped ridge. In addition, the chute 371 of the slide rail seat 37 can also be replaced by other guide rail shapes, such as a rectangular guide rail, a "W" shaped (or dovetail) guide rail, or a cylindrical guide rail, etc. Similarly, the slider The profile of the matching portion of 31 corresponds thereto.

Preferably in this embodiment, the slider 31 is provided with a number of elastic nail heads 31b (3 for illustration, not limited to this), so as to automatically adjust the slide between the slider 31 and the slide rail seat 37. The tightness of the slip fit of the slot 371 . This allows the lighting device to move freely up and down relative to the vertical arm 15, and ensures that it will not automatically slide down due to gravity at any position in the stroke. At the same time, the lighting device of this embodiment is obviously also a freely detachable structure.

In order to realize the adjustment and change of the lighting angle, the rotation mechanism 22 is realized by pivotally connecting the lighting group 23 to the up and down movement mechanism 21 . As shown in FIG. 4 , in this embodiment, specifically, a fixing block 32 is fixedly connected with the sliding block 31 by using screws. The fixing seat 36 of the lighting group and the fixing block 32 fixed on the slider 31 both have a shaft hole, and the shaft screw 34 passing through the shaft hole, the wear-reducing gasket 33 and the elastic washer 35 are used to pivotally connect the two. , thereby constituting the rotating mechanism 22 of the lighting device. Finally, the main part of the lighting group 23 is fixedly connected with the fixing seat 36 by screws. The pivotal connection of the rotating mechanism 22 ensures that the lighting group 23 can rotate around the rotating shaft on the fixed block 32 .

In this embodiment, the lighting group 23 includes a light source assembly and a lens assembly, and the lens assembly is non-adjustable. Optimally, it may also be that the illumination group includes a light source assembly and a lens assembly, and the lens assembly is adjustable for continuously adjusting the illumination range and illumination brightness of the light source assembly. At the same time, the light source assembly of the lighting group 23 may also be a light source with adjustable color temperature and brightness, preferably realized by light emitting diode (LED) light source.

To sum up, it can be seen that the up and down movement mechanism 21 of the lighting device of this embodiment is realized by using a slide rail structure, which can move up and down in a straight line alone. At the same time, the slide rail seat 37 of the lighting device is fixed on the mirror frame 15, so that it can be adjusted The focus mechanism 14 is adjusted to move up and down with the vertical arm 13 synchronously. Therefore, the lighting device of this embodiment realizes the flexible adjustability of the vertical height of the light source. At the same time, the lighting group 23 forms a rotating mechanism 22 by being pivotally connected with the up and down moving mechanism 21, and can be rotated and adjusted to achieve the beam angle. Freedom of adjustment. The illumination device of this embodiment makes the illumination height and/or illumination angle of the illumination group 23 continuously adjustable, thereby realizing oblique bright field illumination, oblique oblique illumination or oblique dark field illumination, and achieving the freedom of beam angle adjustment.

Although the above-mentioned first embodiment realizes the adjustment of the lighting height and lighting angle of the lighting group by implementing the up-and-down movement mechanism and the rotation mechanism, the up-and-down movement mechanism can only move up and down in a straight line, which is still not flexible enough in some applications. Therefore, the utility model also proposes that other motion mechanisms can be used to change the lighting group not only in the lighting height (up and down), but also in the lighting span (front and back).

The fixing part of these extended embodiments is a fixing seat fixedly connected to the bottom of the mirror frame, and a rod body assembly is pivotally connected to the fixing seat, the rod body assembly rotates and swings relative to the fixing seat, and the rotating mechanism is fixed on the rod body assembly , so as to constitute a motion mechanism that can change the lighting height and also change the lighting span.

Specifically, extended embodiments (second embodiment and third embodiment) of the present invention will be described below with reference to the drawings.

A second embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 5 is a schematic diagram of the illuminating device of the second embodiment in a stereo microscope, Fig. 6 is a composition diagram of the oblique illuminating device of this embodiment, and Fig. 7 is a cross-sectional view of the illuminating device of this embodiment. The lighting device of this embodiment is mainly composed of three parts: a casing telescopic rod body swinging motion mechanism 41 , a rotating mechanism 42 , and a lighting group 23 . As shown in Fig. 5 and Fig. 6, the illuminating device of this embodiment is fixed on the fixing part through the telescoping rod body swing mechanism 41 of the casing, the fixing part of this embodiment adopts a fixing seat 61, and the fixing seat 61 and the microscope The mirror frame 15 is fixedly connected together, that is, the illuminating device and the mirror frame 15 can be moved up and down along the vertical arm 13 through the focusing mechanism 14 (rotating the focusing handwheel group). At the same time, the lighting device swings the angle and telescopic length relative to the mirror frame 15 through the sleeve telescopic rod swing mechanism 41, so that the lighting height (up and down) and lighting span (front and back) can be continuously adjusted and changed, and the rotation The mechanism 22 turns the illumination group 23 into different illumination angles, and the light beams emitted by the illumination group 23 irradiate the specimens located on the base 12 along different angles, and pass through the microscope head 11 (eyepiece, zoom body group) for observation through reflection in the viewer's field of view.

As shown in FIG. 7 , the sleeve telescopic rod body swing movement mechanism 41 mainly includes: a sleeve 66 and a movement rod 63 movably socketed therewith. The fixing base 61 (fixing piece) of this embodiment is fixed on the mirror frame 15 with screws, and the sleeve 66 is pivotally connected to the fixing base 61, so that the sleeve 66 can rotate and swing relative to the fixing base 61, The moving rod 63 can telescopically slide relative to the sleeve 66 , thereby constituting a telescopic rod body swinging motion mechanism 41 that can swing relative to the mirror frame 15 in terms of angle and telescopic length.

Specifically in this embodiment, the fixed seat 61 has a shaft hole, and the sleeve 66 also has a shaft hole. The sleeve 66 and the fixed seat 61 are separated by a wear-reducing gasket 69a, and a shaft through the two shafts is used. The connecting shaft 68 of the hole, the elastic washer 67 and the washer 69 are connected.

Preferably, there is also a screw hole in the vertical position connected with one of the shaft holes (this embodiment is the shaft hole on the fixed seat 61 as an example), and a screw 62 is screwed into the screw hole to interfere with the connecting shaft 68 The tightness of the sleeve 66 pivoting with the fixing base 61 can be adjusted according to different strengths. In this way, it can be ensured that the sleeve 66 can rotate and swing up and down and will not slide down automatically at any position. The movement rod 63 is sheathed in the sleeve 66, and the tightness of stretching is changed by rotating the drum 64 to make the two arc-shaped sliders 65 press the movement rod 63.

It is supplemented that, although this embodiment only shows a casing telescopic rod assembly by taking FIG. 7 as an example, those skilled in the art can choose other telescopic rod assembly structures according to needs.

In order to realize the adjustment and change of the lighting angle, the rotation mechanism 22 is realized by pivotally connecting the lighting group 23 to the up and down movement mechanism 21 . Referring to Fig. 7, this embodiment is specific, the connection seat 51 of the lighting group 23 and the movement rod 63 both have a shaft hole, the movement rod 63 and the connection seat 51 are separated by a wear-reducing gasket 69a, and use The connecting shaft 68 passing through the two shaft holes, the elastic washer 67 and the washer 69 are pivotally connected (same as the pivot connection between the fixing base 61 and the sleeve 66 in this embodiment) to constitute the rotation mechanism 42 of the lighting device. The main body of the lighting group 23 is fixedly connected with the connecting base 51 by screws. The pivotal connection of the rotating mechanism 42 ensures that the lighting group 23 can rotate around the rotating shaft on the moving rod 63 .

Preferably, there is also a screw hole in the vertical position connected with one of the shaft holes (this embodiment is the shaft hole on the connecting seat 51 as an example), and a screw 62 is screwed into the screw hole to interfere with the connecting shaft 68 Different strengths are used to adjust the tightness of the pivotal fit between the movement rod 63 and the connecting seat 51 . In this way, it is ensured that the illuminating part 23 can be rotated and will not slide down automatically at any position.

In this embodiment, the same as the first embodiment, the lighting group 23 includes a light source assembly and a lens assembly, and the lens assembly is non-adjustable. Optimally, it may also be that the illumination group includes a light source assembly and a lens assembly, and the lens assembly is adjustable for continuously adjusting the illumination range and illumination brightness of the light source assembly. Similarly, the light source components of the lighting group 23 may also be light sources with adjustable color temperature and brightness, preferably realized by light emitting diode (LED) light sources.

To sum up, it can be seen that the casing telescopic rod body swing mechanism 41 of the lighting device of this embodiment adopts the pivot structure of the swingable rod body assembly, and the rod body assembly is realized by using a telescopic sleeve structure, which can not only move up and down in height alone Movement and forward and backward movement on the span, while the fixed seat 61 of the lighting device is fixed on the mirror frame 15, so that it can move up and down synchronously with the vertical arm 13 by adjusting the focusing mechanism 14. Therefore, the lighting device of this embodiment realizes the two-way flexible adjustability of the light source on the vertical height and the front and rear spans. At the same time, the lighting group 23 forms a rotation mechanism 42 by being pivotally connected with the sleeve telescopic rod body swing movement mechanism 41, It can also be rotated and adjusted, so as to achieve the freedom of beam angle adjustment. The illumination device of this embodiment makes the illumination height (including the illumination front and rear span) and/or illumination angle of the illumination group 23 continuously adjustable, thereby realizing oblique bright field illumination, oblique oblique illumination or oblique dark field illumination, and achieving a beam angle of Freedom of adjustment.

A third embodiment of the present invention will be described below with reference to the accompanying drawings.

Fig. 8 is a schematic diagram of the lighting device of the third embodiment in a stereo microscope, Fig. 9 is a composition diagram of the lighting device of this embodiment, and Fig. 10 is a cross-sectional view of the lighting device of this embodiment. This embodiment is basically similar to the second embodiment. The lighting device of this embodiment is mainly composed of three parts: a swinging movement mechanism 71 of a folding arm type rod body, a rotating mechanism 72 , and a lighting group 23 .

As shown in Fig. 8 and Fig. 9, the illuminating device of this embodiment is fixed on the fixing part through the swinging movement mechanism 71 of the arm type rod body, and the fixing part of this embodiment also adopts a fixing seat 91, which is connected with The mirror frame 15 is fixedly connected together, that is, the illuminating device and the mirror frame 15 can be moved up and down along the vertical arm 13 through the focusing mechanism 14 (rotating the focusing handwheel group). At the same time, the lighting device can freely adjust the up and down position relative to the mirror frame 15 through the swinging movement mechanism 71 of the arm type rod body, so that the lighting height (up and down) and lighting span (front and back) can be continuously adjusted and changed, and Use the rotating mechanism 72 to rotate the illumination group 23 into different illumination angles. The light beams emitted by the illumination group 23 are irradiated on the specimen located on the base 12 along different angles, and pass through the head 11 of the microscope (eyepiece, zoom group) through reflection. into the observer's field of vision.

As shown in FIG. 10 , the folding-arm swing mechanism 71 mainly includes: one or more straight arms 97 (two are used as an example in this embodiment, not limited thereto) and connecting arms 95 . The fixing seat 91 (fixing piece) of this embodiment is fixed on the mirror frame 15 with screws, and the straight arm 97 is pivotally connected to the fixing seat 91, and the other straight arms 97 and the connecting arm 95 are all pivotally connected in turn, so that A folding arm type rod body swinging motion mechanism 71 that can be freely adjusted up and down relative to the mirror frame 15 is formed.

Specifically in this embodiment, the fixed seat 91 has a shaft hole, and the straight arm 97 also has a shaft hole. The straight arm 97 is separated from the fixed seat 91 by a wear-reducing gasket 99, and a shaft through the two shafts is used. The connecting shaft 98 of the hole, the elastic washer 96 and the washer 94 are pivotally connected (same as the second embodiment).

Similarly, there is also a screw hole in the vertical position that passes through one of the shaft holes (this embodiment is the shaft hole on the fixed seat 91 as an example), and a screw 92 is screwed into the conflict between the screw hole and the connecting shaft 98. The tightness of the pivotal fit between the straight arm 97 and the fixing seat 91 is adjusted by different strengths.

Other second straight arm 97 and above-mentioned first straight arm 97, and the second straight arm 97 and connecting arm 95 all are to adopt wear-reducing gasket 99 to separate, and use connecting shaft 98, elastic washer 96 and The washer 94 is pivotally connected, and the difference is that the other end of the connecting shaft 98 is restricted by the shaft pin 93 to prevent it from coming out.

It is supplemented that, although this embodiment only uses FIG. 10 as an example to show a folding-arm rod assembly, those skilled in the art can select other structures of the folding-arm rod assembly according to needs.

In order to realize the adjustment and change of the lighting angle, the rotating mechanism 72 is realized by pivotally connecting the lighting group 23 to the swinging movement mechanism 71 of the folding arm type rod body. Referring to Fig. 10, it is the same as the second embodiment, specifically, the connection base 81 and the connection arm 95 of the lighting group 23 have a shaft hole, and the connection arm 95 and the connection base 81 are used to reduce wear. Spacers are spaced apart, and pivotally connected using a connecting shaft passing through the two shaft holes, an elastic washer and a washer, thereby constituting the rotating mechanism 72 of the lighting device. The main body of the lighting group 23 is fixedly connected with the connecting base 81 by screws. The pivotal connection of the rotating mechanism 42 ensures that the lighting group 23 can rotate around the rotating shaft on the connecting arm 95 .

It is also preferable that the vertical position connected with one of the shaft holes (this embodiment is the shaft hole on the connecting seat 81 as an example) also has a screw hole, and a screw is screwed into the screw hole to resist the connecting shaft. The degree of tightness of the pivotal fit between the connecting arm 95 and the connecting base 81 is adjusted accordingly. In this way, it is ensured that the illuminating part 23 can be rotated and will not slide down automatically at any position.

In this embodiment, the same as the above embodiment, the lighting group 23 includes a light source assembly and a lens assembly, and the lens assembly is non-adjustable. Optimally, it may also be that the illumination group includes a light source assembly and a lens assembly, and the lens assembly is adjustable for continuously adjusting the illumination range and illumination brightness of the light source assembly. Similarly, the light source components of the lighting group 23 may also be light sources with adjustable color temperature and brightness, preferably realized by light emitting diode (LED) light sources.

To sum up, it can be seen that the swing arm swing mechanism 71 of the lighting device in this embodiment adopts the pivot structure of the swingable rod assembly, and the rod assembly is realized by the foldable arm structure, which can not only move up and down in height alone Movement and forward and backward movement on the span, while the fixed base 91 of the lighting device is fixed on the mirror frame 15, so that it can move up and down synchronously with the vertical arm 13 by adjusting the focusing mechanism 14. Therefore, the lighting device of this embodiment realizes the two-way flexible adjustability of the light source in terms of vertical height and front-to-back span, and at the same time, the lighting group 23 forms a rotating mechanism 72 by being pivotally connected with the swinging movement mechanism 71 of the folding arm type rod body, It can also be rotated and adjusted, so as to achieve the freedom of beam angle adjustment. The illumination device of this embodiment makes the illumination height (including the illumination front and rear span) and/or illumination angle of the illumination group 23 continuously adjustable, thereby realizing oblique bright field illumination, oblique oblique illumination or oblique dark field illumination, and achieving a beam angle of Freedom of adjustment.

The above-mentioned second and third embodiments realize the swinging movement mechanism of the rod body by means of the rod body assembly of the sleeve telescopic type and the folding arm type, but those skilled in the art can still choose other pivotal connection methods between the rod body assembly and the fixing piece to realize Rod body swing motion mechanism. For example, it can also be implemented by using a straight-arm extension rod assembly as shown in FIG. 11 , and so on.

In summary, the lighting device of the present invention and the stereo microscope with the lighting device can have the following advantages:

(1) Simple structure and low production cost;

(2) The position of the illumination group can be adjusted freely, which can realize the oblique bright field illumination, oblique oblique illumination and oblique dark field illumination of the specimen, and can realize the continuous change of observation contrast;

(3) Easy disassembly and strong operability;

(4) It is applicable to the observation of both solid-phase specimens and liquid-phase specimens.

Although the utility model has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that, without departing from the spirit and scope of the utility model defined by the appended claims, changes in form and details may be made. Making various changes to the utility model is within the protection scope of the utility model.

Claims (13)

1. a lighting device, is characterized in that, comprising:

One illumination group, this illumination group provides the illuminating ray of demand angle, demand brightness and range of needs to sample, and this illumination group is fixedly connected on a rotating mechanism;

One rotating mechanism, is fixed on a motion, and this rotating mechanism makes this illumination group carry out different light angle change;

One motion, is fixed on a fixture, and this motion makes this illumination group carry out different illuminator level change;

One fixture, is fixedly installed on mirror holder, and moves up and down with mirror holder;

This illumination group makes the illuminator level of illumination group and/or light angle be continuously adjustable by this rotating mechanism and motion, thus realizes oblique fire bright field illumination, the illumination of oblique fire deflection or oblique fire dark ground illumination.

2. lighting device according to claim 1, it is characterized in that: this fixture is the slide track seat be fixedly connected on below mirror holder, there is a chute, on this chute, activity arranges a slide block, this slide block is relatively along the slide of slide track seat, thus forming this motion, this rotating mechanism is fixed on this slide block.

3. lighting device according to claim 2, is characterized in that: this slide block is provided with some elasticity ailheads, automatically to regulate the elasticity be slidably matched of the chute of this slide block and slide track seat.

4. the lighting device according to Claims 2 or 3, is characterized in that: the chute of this slide track seat is " V " font guide rail, rectangular guideway, " W " font guide rail or cylindrical slideway, and the profile of the auxiliary section of this slide block is corresponding with it.

5. lighting device according to claim 1, it is characterized in that: this fixture is a holder being fixedly connected on below mirror holder, this holder is pivoted connection one stem body component, this stem body component is this holder rotary oscillation relatively, thus forming this motion, this rotating mechanism is fixed on this stem body component.

6. lighting device according to claim 5, is characterized in that: this holder has an axis hole, and this stem body component also has an axis hole, is realized and holder pivot joint by the axle of this two axis hole through and elastic washer, pad.

7. lighting device according to claim 6, is characterized in that: the vertical position through with a wherein axis hole also has a screw, and the conflict dynamics screwing in this screw and this axle by a screw regulates the elasticity of this stem body component and this holder pivotal fit.

8. the lighting device according to claim 5 or 6, is characterized in that: described stem body component is telescopic mechanism, the folding arm-type mechanism of exhibition or straight-arm stretching type mechanism.

9. the lighting device according to claim 1 or 2 or 5, is characterized in that: this rotating mechanism realizes variable-angle by this illumination group being pivoted to be connected on this motion.

10. lighting device according to claim 9, it is characterized in that: this rotating mechanism specifically: this illumination group has an axis hole, this motion also has an axis hole, realizes this illumination group and this rotating mechanism pivot joint by the axle of this two axis hole through and elastic washer, pad.

11. lighting devices according to claim 1, is characterized in that: this illumination group comprises light source assembly and lens subassembly, and this lens combination is uncontrollable.

12. lighting devices according to claim 1, is characterized in that: this illumination group comprises light source assembly and lens subassembly, and this lens combination is adjustable, carry out continuously adjustabe for the illumination zone to light source assembly, brightness of illumination.

13. 1 kinds of stereomicroscopes, comprise: eyepiece, zoom body group, focus adjusting mechanism, mirror holder, base and lighting device, for placing observed sample on base, its spy is: this lighting device is as the lighting device as described in arbitrary in the claims 1-12.