CN112904520A - Integrated optical splitter and splitting method thereof - Google Patents
Integrated optical splitter and splitting method thereof Download PDFInfo
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- CN112904520A CN112904520A CN202110206014.9A CN202110206014A CN112904520A CN 112904520 A CN112904520 A CN 112904520A CN 202110206014 A CN202110206014 A CN 202110206014A CN 112904520 A CN112904520 A CN 112904520A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/006—Filter holders
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/0004—Microscopes specially adapted for specific applications
- G02B21/0012—Surgical microscopes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/18—Arrangements with more than one light path, e.g. for comparing two specimens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/18—Arrangements with more than one light path, e.g. for comparing two specimens
- G02B21/20—Binocular arrangements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/106—Beam splitting or combining systems for splitting or combining a plurality of identical beams or images, e.g. image replication
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
Abstract
The invention relates to a light splitter, in particular to an integrated light splitter and a light splitting method thereof. An integrated optical splitter comprises an optical splitting seat, an optical splitting interface and an optical splitting prism, wherein the optical splitting interface and the optical splitting prism are arranged on the optical splitting seat, and the optical splitting prism respectively corresponds to the optical splitting interface and an eyepiece hole in the top of the optical splitting seat; the said light splitting interface is no less than one, also include: the light filtering fixing device is movably arranged on the light splitting base and is positioned between the light splitting interface and the light splitting prism; and at least one optical filter is arranged on the optical filter fixing device, and the optical filter fixing device is used for installing or removing the optical filter between the light splitting interface and the light splitting prism. The integrated optical splitter provided by the invention adopts the switchable optical filtering fixing device to replace the optical filter, has a simple structure, does not need to disassemble and assemble the optical splitter or an imaging adapter, and has the advantages of wide application range, low cost and simple and rapid replacement of the optical filter.
Description
Technical Field
The invention relates to a light splitter, in particular to an integrated light splitter and a light splitting method thereof.
Background
The existing medical optical equipment such as an operation microscope, a slit lamp microscope and the like is provided with an eyepiece for a doctor to observe, and is also provided with an auxiliary hand mirror, a camera, a mobile phone and other image equipment according to needs, so that the optical equipment is often used in combination with a light splitter. Taking the operation microscope with an external imaging function as an example, three modules, namely a beam splitter, an imaging adapter and an imaging device, are generally required. The beam splitter is used as an independent module and is additionally arranged in a parallel light beam of a main optical path observed by an operating microscope, a beam of light is divided into two or more beams according to a proportion by a beam splitter prism arranged inside, the divided light is converged and imaged by an imaging adapter and finally acquired by imaging equipment, so that the synchronous image of the main optical path can be acquired. Because image equipment's specification is various, and the formation of image adapter also needs different focus and structure rather than the cooperation, all adopts detachable connected mode between consequently spectroscope, formation of image adapter and the image equipment to make things convenient for the change.
Traditional operation microscope is mostly the white light illumination mode, but because many normal tissues and pathological change tissue are difficult for distinguishing under the condition of ordinary white light illumination, consequently current operation microscope is more and more can switch different illumination modes according to different demands, like fluorescence illumination, because normal tissue and pathological change tissue excited the spectrum and have great difference, can pinpoint the affected part rapidly and clear differentiation its border. The excitation light in the fluorescent lighting mode is generally monochromatic light with different specific wavelength bands, the energy of the excitation light is large, the spectral distribution of a light source in a lighting light path needs to be changed or different light sources need to be switched at the moment, and in order to optimize the observation effect and protect the eyes of an operator from light injury, a fluorescent filter needs to be added in an observation main light path to eliminate the excitation light. Similarly, the external image light path split by the optical splitter also needs to add a corresponding optical filter to achieve a better observation effect.
In addition, for example, when a tooth is observed by an operation microscope in dental treatment and diagnosis, the glaze of the tooth and saliva attached to the tooth can generate mirror reflection, and light incident on the tooth can be directly received by human eyes or a camera through the mirror reflection under the illumination of reflected light, so that very bright spots can be seen, the resolution and contrast of detail observation are seriously affected, especially for an image device, due to the limited dynamic range, the bright spots can often cause that an image can not be observed completely, and at the moment, a polarizing film is required to be added into a light path to filter out strong interference light reflected by the mirror.
Although some schemes add a filter structure before observing the beam splitter in the main optical path, which improves the observation effect of the main-mirror visual optical system, the imaging device often needs an additional filter to achieve the best observation effect because the response characteristics of the imaging device and the human eye are different.
Therefore, in the prior art, the above situations all require disassembling the connection structure between the optical splitter, the imaging adapter or the imaging device, adding the corresponding optical filter, or directly replacing the optical splitter, the imaging adapter or the imaging device with a special optical filter. Either operation requires additional parts and cumbersome disassembly and assembly steps, which are time and effort consuming and may add additional cost, such as higher risk of replacement during the course of the procedure.
Disclosure of Invention
In order to solve the above problems, the present invention provides an integrated optical splitter with simple structure, no need of assembling and disassembling the optical splitter or the imaging adapter, wide application range, low cost, simple and rapid optical filter replacement, the specific technical scheme is as follows:
an integrated optical splitter comprises an optical splitting seat, an optical splitting interface and an optical splitting prism, wherein the optical splitting interface and the optical splitting prism are arranged on the optical splitting seat, and the optical splitting prism respectively corresponds to the optical splitting interface and an eyepiece hole in the top of the optical splitting seat; the said light splitting interface is no less than one, also include: the light filtering fixing device is movably arranged on the light splitting base and is positioned between the light splitting interface and the light splitting prism; and at least one optical filter is arranged on the optical filter fixing device, and the optical filter fixing device is used for installing or removing the optical filter between the light splitting interface and the light splitting prism.
Preferably, the filtering fixing device comprises at least one filter plate, at least one filter is mounted on the filter plate, at least one filtering slot is formed in the light splitting seat, the filtering slot is located between the light splitting interface and the light splitting prism, and the filter plate is movably inserted into the filtering slot.
Furthermore, the device also comprises a connecting plate, and both ends of the connecting plate are provided with the filter plates.
Preferably, the filtering fixing device comprises a first filtering ring, at least one optical filter is arranged on the first filtering ring, an annular filtering groove is formed in the light splitting base, the filtering groove is located between the light splitting interface and the light splitting prism, and the first filtering ring is movably arranged in the filtering groove.
Furthermore, the filtering fixing device further comprises a second filtering ring, wherein at least one optical filter is arranged on the second filtering ring, and the second filtering ring is movably inserted in the filtering groove and is arranged coaxially with the first filtering ring.
Further, still include rotating device, rotating device includes: the first bevel gear is rotatably arranged on the light splitting seat; the first knob is connected with the first bevel gear; the first bevel gear ring is fixed on the first light filtering ring and meshed with the first bevel gear, the first light filtering ring is rotatably installed in the light filtering groove, and the first bevel gear is used for driving the first light filtering ring to rotate through the first bevel gear ring; the second bevel gear is rotatably arranged on the light splitting seat; a second knob connected with the second bevel gear; and the second taper gear ring is fixed on the second light filtering ring and meshed with the second taper gear, the second light filtering ring is rotatably arranged in the light filtering groove, and the second taper gear is used for driving the second light filtering ring to rotate through the second taper gear ring.
Furthermore, the device also comprises a positioning device, wherein the positioning device comprises a spring piece or a ball plunger, and the positioning device is used for fixing and positioning the filtering fixing device.
Preferably, still include the eyepiece filter plate, be equipped with on the eyepiece filter plate and be no less than two light filters, the eyepiece filter plate rotates and installs on the beam split seat, and is located between beam split prism and the eyepiece for the filtering of eyepiece.
Preferably, the device further comprises a right-angle prism or a reflector, and the right-angle prism or the reflector is used for replacing the beam splitting prism when the eyepiece is not provided.
A light filter plate provided with at least one light filter is inserted between a light splitting prism and a light splitting interface to filter light, or a light filter ring provided with at least one light filter is rotated to filter light, wherein the light filter ring is positioned between the light splitting prism and the light splitting interface.
Furthermore, the rotary rotation is arranged on the light splitting seat, and an ocular filter plate with at least two optical filters is arranged, so that the optical filters are positioned between the ocular and the light splitting prism.
Compared with the prior art, the invention has the following beneficial effects:
the integrated optical splitter provided by the invention adopts the switchable optical filtering fixing device to replace the optical filter, has a simple structure, does not need to disassemble and assemble the optical splitter or an imaging adapter, and has the advantages of wide application range, low cost and simple and rapid replacement of the optical filter.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a schematic structural diagram of a filter plate;
FIG. 3 is a diagram of the optical path of the beam splitter for splitting and filtering light with an eyepiece;
FIG. 4 is a diagram of the beam splitter's optical path for splitting and filtering without an eyepiece;
FIG. 5 is a schematic structural view of the second embodiment;
FIG. 6 is a schematic structural view of the third embodiment;
FIG. 7 is a schematic structural view of the fourth embodiment;
FIG. 8 is a schematic diagram of a first light filtering ring;
FIG. 9 is a cross-sectional view of the fourth embodiment taken along the bevel gear axis;
FIG. 10 is a cross-sectional view of the fourth embodiment taken along the axis of the ball plunger;
FIG. 11 is a schematic structural view of the seventh embodiment;
FIG. 12 is a schematic structural view of the eighth embodiment;
fig. 13 is a schematic view of the connection structure of the integrated beam splitter with the imaging adapter and the imaging device.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 13, an integrated optical splitter includes an optical splitting base 1, an optical splitting interface 11 and an optical splitting prism 12 mounted on the optical splitting base 1, where the optical splitting prism 12 corresponds to the optical splitting interface 11 and an eyepiece hole 13 at the top of the optical splitting base 1 respectively; light splitting interface 11 is no less than one, and beam splitting prism 12 and light splitting interface 11 one-to-one still include: the filtering fixing device is movably arranged on the light splitting base 1 and is positioned between the light splitting interface 11 and the light splitting prism 12; and the number of the optical filters 3 is not less than one, and the optical filters 3 are all arranged on an optical filtering fixing device, and the optical filtering fixing device is used for loading or removing the optical filters 3 between the light splitting interface 11 and the light splitting prism 12.
One or more light splitting interfaces 11 are arranged, so that various light splitting requirements can be met. Typically, one optical splitting interface 11 or two optical splitting interfaces 11 are provided.
The filter fixing device is used for fixing the optical filter 3, so that the light split by the beam splitter prism 12 enters the photosensitive element 921 after passing through the optical filter 3.
The kind of the filter 3 may be selected as needed.
The filtering fixing device is movably arranged on the light splitting base 1, so that the light splitter is not required to be disassembled, only the filtering fixing device is required to be disassembled, and different types of optical filters 3 are convenient to install according to requirements.
The eyepiece holes 13 correspond to the binocular tubes of the microscope for the light to enter.
As shown in fig. 1 and 2, the filtering fixing device includes at least one filter plate 21, at least one filter 3 is installed on the filter plate 21, at least one filtering slot is installed on the splitting base 1, the filtering slot is located between the splitting interface 11 and the splitting prism 12, and the filter plate 21 is movably inserted into the filtering slot.
The filter plate 21 can be conveniently inserted and pulled out, the filter plate 21 provided with the corresponding optical filter 3 is selected according to the requirement, the filter plate 21 is inserted into the filter slot, and the optical filter 3 is positioned between the light splitting prism 12 and the light splitting interface 11, so that the light filtering is realized.
When one filter 3 is mounted on the filter 21, the filter 21 can only perform one filtering, and the filter 21 needs to be replaced as a whole when different filtering is switched. When the filter plate 21 is provided with a plurality of filters 3 and each filter 3 is different, one filter plate 21 can realize a plurality of kinds of filtering, and when different filtering is switched, only the filter plate 21 needs to be moved in the filter groove, so that the corresponding filter 3 is located between the light splitting interface 11 and the light splitting prism 12.
The number of the filter slots is the same as that of the optical splitting interfaces 11, that is, one optical splitting interface 11 corresponds to one filter slot. Each of the light splitting interfaces 11 uses the filter plate 21 independently without interfering with each other. When being equipped with a beam split interface 11, set up a filtering slot, beam split interface 11 sets up two filtering slots when being equipped with two.
In at least one embodiment, the filter plate 21 is provided with a through hole, which implements a neutral position function, and directly transmits the light split by the beam splitter prism 12 to the photosensitive element 921 through the through hole when the optical filter 3 is not needed.
The light-passing holes 41 enable the filter plate 21 to be inserted into the filter slots, so that light leakage of the filter slots is avoided.
Besides the conventional optical filter 3, the filter fixing device can also be provided with a polarizing filter, a laser protection plate, a diaphragm plate and the like.
The optical filter 3 is added in the optical path through the optical filtering fixing device, the structure is simple, and the replacement is convenient.
As shown in fig. 13, the spectroscope is connected to the imaging adapter 91, and the imaging adapter 91 is connected to the imaging device 92.
In not less than one embodiment, a right angle prism 15 or a reflector is also included, and the right angle prism 15 or the reflector is used for replacing the beam splitter prism 12 when the microscope is not provided with an eyepiece.
As shown in fig. 3, the bottom of the spectroscopic base 1 is connected to the microscope body, one of the light beams is split by the beam splitter 12, and after passing through the optical filter 3, the light beam is reflected by the reflecting prism 911 in the imaging adapter 91 to the photosensitive element 921 in the imaging device 92, and the other light beam enters the binocular tube of the microscope.
Aiming at the direct observation without visual observation and only needing to collect images, namely the optical splitting prism 12 can be replaced by a right-angle prism 15, a reflector or other optical elements for turning light rays when the operating microscope is in an ocular-free structure.
As shown in fig. 4, the bottom of the spectroscopic holder 1 is connected to the microscope body, and the light is reflected by the rectangular prism 15, passes through the optical filter 3, and is reflected by the reflecting prism 911 in the imaging adapter 91 onto the photosensitive element 921 in the imaging device 92.
Example two
As shown in fig. 5, the present embodiment is different from the first embodiment in that: the two light splitting interfaces 11 are symmetrically arranged, and the two light filtering slots are symmetrically arranged; the device also comprises a connecting plate 22, and both ends of the connecting plate 22 are provided with the filter plates 21.
The connecting plate 22 realizes the synchronous disassembly and assembly of the two filter plates 21.
In at least one embodiment, the device further comprises a plugging rod 23, and the plugging rod 23 is fixed on the connecting plate 22. The plug-pull rod 23 realizes synchronous plug-in and pull-out of the two filter plates 21, and is convenient to use.
EXAMPLE III
As shown in fig. 6 to 10, the present embodiment is different from the first embodiment in that: filter fixing device includes first filter ring 4, is equipped with the light filter 3 that is no less than one on first filter ring 4, is equipped with the light filtering groove on the beam split seat 1, and the light filtering groove is located between beam split interface 11 and beam splitter prism 12, and first filter ring 4 movable mounting is in the light filtering groove.
Specifically, the first light filtering ring 4 may be provided with one light filter 3, two light filters 3, three light filters 3, four light filters 3, five light filters 3 or six light filters 3, and the number of the light filters 3 may be specifically set according to the structural size.
The switching of the optical filter 3 is realized by rotating the first light filtering ring 4, so that the use is more convenient, and the dust can be prevented from entering the inside of the optical splitter.
Example four
As shown in fig. 7 to 9, on the basis of the third embodiment, the apparatus further includes a rotating device, and the rotating device includes: the first bevel gear 52, the first bevel gear 52 is installed on the beam-splitting seat 1 rotatably; a first knob 53, wherein the first knob 53 is connected with the first bevel gear 52; and the first bevel gear ring 42 is fixed on the first light filtering ring 4 and meshed with the first bevel gear 52, the first light filtering ring 4 is rotatably installed in the light filtering groove, and the first bevel gear 52 is used for driving the first light filtering ring 4 to rotate through the first bevel gear ring 42.
The rotating device can conveniently rotate the first filtering ring 4, so that the switching of the optical filters 3 is realized, different optical filters 3 are switched to intervene in the light splitting light path, and different filtering requirements are met.
As shown in fig. 6 to 10, the two sides of the light splitting base 1 are symmetrically provided with the light splitting interfaces 11, the first light filtering ring 4 is provided with two sets of filtering lights, the two sets of filtering lights respectively correspond to the two light splitting interfaces 11, and each set of filtering lights is provided with three light filtering pieces 3 and one light through hole 41, so that adjustment of one neutral position and three filtering positions is realized.
The two groups of filtering can be symmetrically arranged to realize synchronous filtering of the light splitting interfaces 11 on the two sides, namely that the two light splitting interfaces 11 are always filtering in the same kind. The two sets of filtering can be independent from each other, so that the two light splitting interfaces 11 can perform different filtering.
In a conventional operation, the operation microscope operates in a white light mode, the energy of the illumination light is concentrated in a visible light band with a wavelength of about 400-700 nm, and at this time, in order to avoid the interference of non-visible light in the environment, the imaging device 92 needs to be configured with an optical low-pass filter OLPF with a cut-off wavelength of about 750nm, and light higher than this wavelength is filtered.
When the ICG contrast function is required, the operating microscope is switched to a corresponding fluorescence mode or a white light fluorescence mixed mode, the wavelength of the fluorescence illumination light is usually 780nm, and the wavelength of the fluorescence excited after the fluorescence illumination light irradiates on the biological tissue is about 800nm to 850nm, at this time, the imaging device 92 equipped with the 750nm optical low-pass filter cannot acquire the fluorescence image at all, so the original OLPF must be removed. Meanwhile, because the brightness of the excited fluorescence is extremely low, in order to improve the contrast of the acquired image, a high-pass filter of 800nm is required to be configured to filter out light rays with other wavelengths.
Since the examination requirements of different departments, diseases, etc. are different, and the wavelengths of the used fluorescence are various, the same operation microscope is often provided with two kinds of fluorescence with different wavelengths, and the filters required to be configured by the imaging device 92 are different.
Under the above circumstances, for the external imaging system, in the prior art, it is necessary to disassemble the connection structure between the optical splitter, the imaging adapter 91 or the imaging device 92, add the corresponding optical filter 3, or directly replace the optical splitter, the imaging adapter 91 or the imaging device 92 with a dedicated optical filter 3.
By adopting the scheme of fig. 6, the first filter is set to be an OLPF of 750nm, the second filter is set to be a high-pass filter of 800nm, the third filter can be set to be a filter of another wave band according to requirements, and the three filters can be switched by manual or electric rotation according to requirements, so that the correct target image can be captured by the imaging device 92 in various working modes. The imaging device 92 can be disposed on either the left or right side of the splitter, and can achieve different filtering effects in the fourth gear (third gear + neutral).
If only one tap 11 is available, a neutral position and seven filter position adjustments can be made.
EXAMPLE five
As shown in fig. 11, on the basis of the third embodiment, the filtering and fixing device further includes a second filtering ring 7, at least one optical filter 3 is installed on the second filtering ring 7, and the second filtering ring 7 is movably inserted into the filtering groove and is coaxially arranged with the first filtering ring 4.
The first light filtering ring 4 is movably sleeved on the second light filtering ring 7 to realize double-layer light filtering rings, so that the two light filters 3 are overlapped for use, and more light filtering effects are realized. One of the light filtering rings can be independently used, the first light filtering ring 4 and the second light filtering ring 7 are respectively provided with a light through hole 41, and the light through holes 41 can realize the function of one light filter 3 or no light filtering.
EXAMPLE six
On the basis of the fifth embodiment, the device further comprises a rotating device, and the rotating device comprises: the first bevel gear 52, the first bevel gear 52 is installed on the beam-splitting seat 1 rotatably; a first knob 53, wherein the first knob 53 is connected with the first bevel gear 52; the first bevel gear ring 42 is fixed on the first light filtering ring 4 and meshed with the first bevel gear 52, the first light filtering ring 4 is rotatably installed in the light filtering groove, and the first bevel gear 52 is used for driving the first light filtering ring 4 to rotate through the first bevel gear ring 42; the second bevel gear is rotatably arranged on the light splitting seat 1; the second knob is connected with the second bevel gear; and the second taper gear ring is fixed on the second light filtering ring 7 and meshed with the second taper gear, the second light filtering ring 7 is rotatably installed in the light filtering groove, and the second taper gear is used for driving the second light filtering ring 7 to rotate through the second taper gear ring.
The first bevel gear 52 and the second bevel gear are arranged on the outer circular surface of the light splitting base 1 and are respectively positioned at the top and the bottom.
EXAMPLE seven
As shown in fig. 8 and 10, on the basis of any one of the above embodiments, the optical filter fixing device further comprises a positioning device, wherein the positioning device comprises a spring sheet or a ball plunger 6, and the positioning device is used for fixing and positioning the optical filter fixing device.
The light filtering fixing device is provided with a positioning groove, and the spring piece or the ball plunger 6 is pressed in the positioning groove to realize fixing and positioning.
Specifically, the spring piece or the ball plunger 6 is fixed on the light splitting seat 1, positioning grooves are formed in the filter plate 21 or the filter ring, and the spring piece or the ball plunger 6 is used for fixing and positioning the filter plate 21 or the filter ring through the positioning grooves. The positioning grooves correspond to the optical filters 3 one by one.
As shown in fig. 8 and 10, the first positioning groove 43 is formed in the top of the first filter ring 4, and the ball plunger 6 is pressed in the first positioning groove 43, so that the filter 3 is located between the splitting interface 11 and the splitting prism 12 and faces the splitting interface 11 and the splitting prism.
Example eight
On the basis of any one of the above embodiments, as shown in fig. 11, the device further includes an eyepiece filter plate 8, wherein at least two optical filters 3 are installed on the eyepiece filter plate 8, and the eyepiece filter plate 8 is rotatably installed on the spectroscopic base 1 and located between the spectroscopic prism 12 and the eyepiece for filtering the eyepiece.
The ocular filter plate 8 is a circular plate or a disk-like plate and can rotate. The ocular filter plate 8 can also be positioned by a ball plunger.
When the eyepiece is a binocular, the number of the optical filters 3 of the eyepiece filter plate 8 is an even number, and two optical filters 3 of each type are arranged, so that the binocular filters are the same. When the eyepiece is a monocular, the number of the filters 3 may be set according to the size.
Example nine
On the basis of any one of the above embodiments, in a light splitting method of a light splitter, a filter plate provided with at least one filter is inserted between a light splitting prism and a light splitting interface to perform filtering, or a filter ring provided with at least one filter is rotated to perform filtering, wherein the filter ring is located between the light splitting prism and the light splitting interface.
The rotary rotation is arranged on the light splitting seat, and the ocular filter plate is provided with at least two optical filters, so that the optical filters are positioned between the ocular and the light splitting prism.
Any side of the optical splitter can theoretically realize 16 different filtering effects (1 neutral position +6 single +9 collocation). For example: on the basis of fig. 11, the filtering configuration is as follows:
1) a polarization filter can be arranged on the first light filtering ring 4, so that the effects of eliminating mirror reflection strong interference light and improving imaging contrast are achieved;
in addition, for example, when the teeth are observed by an operation microscope in dental treatment and diagnosis, the glaze of the teeth and saliva attached to the glaze can generate mirror reflection, and light incident on the teeth can be directly received by human eyes or a camera through the mirror reflection under the illumination of reflected light, so that very bright spots can be seen, the resolution and contrast of detail observation are seriously affected, especially for the imaging device 92, due to the limited dynamic range, the bright spots often cause that images cannot be observed at all, and at the moment, a polarizing film is required to be added into the light path to filter out strong interference light reflected by the mirror.
2) A laser protection sheet can be arranged on the first light filtering ring 4 to intercept laser beams with specified wavelengths and protect the image equipment 92, in particular the high-sensitivity photosensitive element 921;
laser is often used to treat the affected part during the operation, and due to the good directivity and high brightness of the laser, the reflected light beam on the surface of the surgical instrument may enter the observation optical path of the microscope, and damage may be caused to the high-sensitivity photosensitive element 921 in the imaging device 92.
3) The first light filtering ring 4 can also be provided with diaphragm sheets (spatial filters) with different diameters of the light passing holes 41, so that the effect of changing the depth of field of the imaging or reducing the stray light interference is realized.
The diaphragms with different apertures can change the aperture of the passing light beams, change the high-low frequency distribution of imaging, adjust the depth of field range of the imaging and simultaneously reduce the interference stray light generally positioned at the periphery of a field of view.
The polarizing filter 3, the laser guard plate and the diaphragm plate on the first light filtering ring 4 can be used in cooperation with the conventional filter 3 on the second light filtering ring 7.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (11)
1. An integrated optical splitter comprises an optical splitting seat, an optical splitting interface and an optical splitting prism, wherein the optical splitting interface and the optical splitting prism are arranged on the optical splitting seat, and the optical splitting prism respectively corresponds to the optical splitting interface and an eyepiece hole in the top of the optical splitting seat; it is characterized in that the light splitting interface is not less than one, and the light splitting system further comprises:
the light filtering fixing device is movably arranged on the light splitting base and is positioned between the light splitting interface and the light splitting prism; and
and at least one optical filter is arranged on the optical filter fixing device, and the optical filter fixing device is used for installing or removing the optical filter between the light splitting interface and the light splitting prism.
2. The integrated optical splitter according to claim 1, wherein the filtering fixing device comprises at least one filtering plate, at least one filtering sheet is mounted on the filtering plate, at least one filtering slot is formed in the splitting base, the filtering slot is located between the splitting interface and the splitting prism, and the filtering plate is movably inserted into the filtering slot.
3. The integrated optical splitter according to claim 2, further comprising a connecting plate, wherein the connecting plate is provided with filter plates at both ends.
4. The integrated optical splitter according to claim 1, wherein the filtering fixing device includes a first filtering ring, at least one optical filter is mounted on the first filtering ring, an annular filtering groove is formed on the splitting base, the filtering groove is located between the splitting interface and the splitting prism, and the first filtering ring is movably mounted in the filtering groove.
5. The integrated optical splitter according to claim 4, wherein the filtering fixing device further comprises a second filtering ring, at least one filter is mounted on the second filtering ring, and the second filtering ring is movably inserted into the filtering groove and is coaxially arranged with the first filtering ring.
6. An integrated optical splitter according to claim 5 further comprising a rotating device, the rotating device comprising:
the first bevel gear is rotatably arranged on the light splitting seat;
the first knob is connected with the first bevel gear;
the first bevel gear ring is fixed on the first light filtering ring and meshed with the first bevel gear, the first light filtering ring is rotatably installed in the light filtering groove, and the first bevel gear is used for driving the first light filtering ring to rotate through the first bevel gear ring;
the second bevel gear is rotatably arranged on the light splitting seat;
a second knob connected with the second bevel gear; and
and the second taper gear ring is fixed on the second light filtering ring and meshed with the second taper gear, the second light filtering ring is rotatably installed in the light filtering groove, and the second taper gear is used for driving the second light filtering ring to rotate through the second taper gear ring.
7. The integrated splitter according to claim 1, further comprising a positioning device comprising a leaf spring or a ball plunger, wherein the positioning device is used for fixing and positioning the filter fixing device.
8. The integrated optical splitter according to any one of claims 1 to 7, further comprising an eyepiece filter plate, wherein at least two optical filters are mounted on the eyepiece filter plate, and the eyepiece filter plate is rotatably mounted on the optical splitter base and located between the beam splitter prism and the eyepiece for filtering the optical filters of the eyepiece.
9. An integrated splitter according to any one of claims 1 to 7 further comprising a right angle prism or mirror for replacing the splitting prism without an eyepiece.
10. A light splitting method of a light splitter is characterized in that a filter plate provided with at least one optical filter is inserted between a light splitting prism and a light splitting interface to carry out light filtering, or a filter ring provided with at least one optical filter is rotated to carry out light filtering, wherein the filter ring is positioned between the light splitting prism and the light splitting interface.
11. The method of claim 10, wherein the eyepiece filter plate is rotatably mounted on the spectroscopic mount and has at least two optical filters disposed between the eyepiece and the prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110206014.9A CN112904520A (en) | 2021-02-24 | 2021-02-24 | Integrated optical splitter and splitting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116211240A (en) * | 2023-02-27 | 2023-06-06 | 万灵帮桥医疗器械(苏州)有限责任公司 | Integrated beam splitter and slit lamp microscope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116211240A (en) * | 2023-02-27 | 2023-06-06 | 万灵帮桥医疗器械(苏州)有限责任公司 | Integrated beam splitter and slit lamp microscope |
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