CN110367916A - Multimode endoscope light source unit - Google Patents

Abstract

The present invention provides a kind of multimode endoscope light source units, belong to endoscopic technique field.It solves the problems, such as that existing endoscope light source unit using optical filtering wheel disc there is poor, the maximum light-source brightness of structural stability to be limited.This multimode endoscope light source unit, including cabinet and outgoing optical cable, an end light source and several side light sources are equipped in cabinet, end light source and the light inlet of outgoing optical cable are oppositely arranged, several side light sources are located at the side of end light source and light inlet line and set gradually along the line, the transflection beam for being used to reflex to the light that the side light source for setting of being corresponding to it is issued light inlet that is several equal with side quantity of light source and being arranged in a one-to-one correspondence is equipped between end light source and light inlet, the light that the light and end light source that all transflection beams that the transmission of transflection beam is located at the rear part are reflected issue.The present invention has many advantages, such as that compact-sized, non-activity part, good reliability, can draw up multiple scattering.

Description

Multimode endoscope light source device

technical field

The invention belongs to the technical field of endoscopes, and relates to an endoscope light source device, in particular to a multi-mode endoscope light source device.

Background technique

When the light source illuminates the tissue in the body, due to the different penetration depths of light of different wavelengths, the final observation result is the superposition of multiple layers of images with different depths. The wider the spectral band, the wider the depth range the image contains. When the electronic endoscope uses white light illumination, due to the wide wavelength range of the white light spectrum, the received image has low contrast and blurred details, which is not conducive to the observation of fine blood vessel structures and the problem of distinguishing normal and diseased tissues.

In order to obtain clearer images, especially capillary and mucosal information, the endoscope illumination system on the market uses a filter wheel to intercept white light to obtain a specific spectrum. For example, a Chinese patent discloses a multispectral endoscopic imaging device [authorized announcement number CN106618458B], which includes an endoscopic lens, a CMOS camera assembly, an image processing unit, a display unit, a storage unit and a light source component; wherein the endoscopic lens and The CMOS camera assembly is detachably connected, and the CMOS camera assembly, the display unit and the storage unit are respectively connected with the corresponding connection ends of the image processing unit; it also includes a narrowband filter color wheel, a color wheel servo motor and a control mechanism; a narrowband filter color wheel It is drivingly connected with the color wheel servo motor, and the light source part is connected with the narrow-band filter color wheel, and the color wheel servo motor and the image processing unit are respectively connected with the control mechanism; the narrow-band filter color wheel includes a narrow-band filter turntable, a narrow-band filter A plurality of different narrow-band filters are arranged on the circumference of the disc turntable.

Although the above-mentioned multispectral endoscopic imaging device can obtain spectra of different specific wavelength bands, it still has the following problems: 1. The efficiency of screening the spectrum of specific wavelength bands from white light is low; 2. Due to the existence of problem 1, the specific spectrum of The maximum brightness is limited, which affects the lighting effect; the more bands that are screened, the lower the maximum brightness; 3. Mechanical structures such as color wheel servo motors need to be set, which increases the risk of equipment failure.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a reliable multi-mode endoscope light source device in view of the above-mentioned problems in the prior art.

The object of the present invention can be realized through the following technical solutions:

The multi-mode endoscope light source device includes a box body and an outgoing optical cable, and the light input end of the outgoing optical cable extends into the box body. It is characterized in that an end light source and a plurality of side light sources are arranged in the box. , the end light source and the light input end are arranged opposite to each other, a plurality of the side light sources are located on the side of the line connecting the end light source and the light input end and are arranged in sequence along the line, and the end light source and the light input end are arranged in sequence. Between the light ends, there are a number of transflectors that are equal in number to the side light sources and are arranged in a one-to-one correspondence for reflecting the light emitted by the corresponding side light sources to the light entrance end, and the transflectors transmit the light. The light reflected by all transflectors located behind it and the light emitted by the end light source. Among them, the light source brightness of the end light source can be finely adjusted within the output range of 0-100%, and the light source brightness of each side light source can be finely adjusted within the output range of 0-100%. Affected by the adjustment of other light sources, the adjustment method is realized by changing the voltage across the light source.

The end light source is located at the rear, the outgoing optical cable is located at the front, and several side light sources are arranged in sequence from the back to the front. It is perpendicular to the end face of the light entrance end. The light emitted by the end light source sequentially transmits several transflectors and then enters the light entrance end; the light emitted by the side light source is reflected by the transflector arranged opposite to the side light source, and is transmitted through the front part of the side light source. All the transflectors are incident to the light input end of the outgoing optical cable. The front part of the transflector has a reflection plane, and the side light sources and the outgoing optical cables arranged opposite to the transflector are located on the same side of the reflection plane.

In the above-mentioned multi-mode endoscope light source device, a plurality of the side light sources are arranged in order from back to front according to the wavelengths of the light emitted by them, and the wavelengths of the light emitted by the end light sources are greater than those emitted by the side light sources. wavelength.

Let the wavelength of the light emitted by the light source be λ1, and the boundary wavelength between the transmitted wavelength and the reflected wavelength of the transflector is λ2. When λ2 < λ1, the light emitted by the light source transmits the transflector, and when λ2 > λ1, the light emitted by the light source is Transflector reflection.

In the above-mentioned multi-mode endoscope light source device, the number of the side light sources is 2-6.

In the above-mentioned multi-mode endoscope light source device, there are three side light sources: a first side light source, a second side light source and a third side light source, which are arranged in sequence from back to front. There are three transflectors: a first transflector arranged opposite to the first side light source, a second transflector arranged opposite to the second side light source, and a third transflector arranged opposite to the third side light source The wavelength of light emitted by the end light source is greater than the boundary wavelength between the transmission wavelength and the reflection wavelength of the first transflector, and the boundary wavelength between the transmission wavelength and the reflection wavelength of the first transflector is greater than the first side light source emits The wavelength of the light, the wavelength of the light emitted by the first side light source is greater than the boundary wavelength between the transmission wavelength and the reflection wavelength of the second transflector, and the boundary wavelength between the transmission wavelength and the reflection wavelength of the second transflector is greater than the second transflector. The wavelength of the light emitted by the side light source, the wavelength of the light emitted by the second side light source is greater than the boundary wavelength between the transmission wavelength and the reflection wavelength of the third transflector, and the boundary between the transmission wavelength and the reflection wavelength of the third transflector The wavelength is greater than the wavelength of the light emitted by the third side light source.

The wavelength of light emitted by the first side light source is greater than the wavelength of light emitted by the second side light source, and the wavelength of light emitted by the second side light source is greater than the wavelength of light emitted by the third side light source. The light emitted by the end light source transmits the first transflector, the second transflector and the third transflector, and the light emitted by the first side light source is reflected by the first transflector and then transmits through the second transflector and the third transflector. For the third transflector, the light emitted by the second side light source is reflected by the second transflector and then transmitted through the third transflector, and the light emitted by the third side light source is reflected by the third transflector.

In the above-mentioned multi-mode endoscope light source device, the wavelength of the light emitted by the end light source is 600-660 nm, the wavelength of the light emitted by the first side light source is 500-550 nm, and the wavelength of the light emitted by the second side light source is 500-550 nm. The wavelength of the light is 430-470 nm, and the wavelength of the light emitted by the third side light source is 380-440 nm.

In the above-mentioned multi-mode endoscope light source device, the boundary line between the transmission wavelength and the reflection wavelength of the first transflector is the sum of the wavelength of the light emitted by the end light source and the wavelength of the light emitted by the first side light source. The dividing line between the transmitted wavelength and the reflected wavelength of the second transflector is one-half of the sum of the wavelength of the light emitted by the first side light source and the wavelength of the light emitted by the second side light source. The boundary line between the transmission wavelength and the reflection wavelength of the third transflector is half of the sum of the wavelength of the light emitted by the second side light source and the wavelength of the light emitted by the third side light source.

In the above-mentioned multi-mode endoscope light source device, a plurality of the side light sources are arranged in order from the back to the front according to the wavelengths of the light emitted by them, and the wavelengths of the light emitted by the end light sources are smaller than those emitted by the side light sources. wavelength.

In the above-mentioned multi-mode endoscope light source device, there are three side light sources: a first side light source, a second side light source and a third side light source, which are arranged in sequence from back to front. There are three transflectors: a first transflector arranged opposite to the first side light source, a second transflector arranged opposite to the second side light source, and a third transflector arranged opposite to the third side light source The wavelength of light emitted by the end light source is smaller than the boundary wavelength between the reflection wavelength and the transmission wavelength of the first transflector, and the boundary wavelength between the reflection wavelength and the transmission wavelength of the first transflector is smaller than that emitted by the first side light source. The wavelength of the light, the wavelength of the light emitted by the first side light source is less than the boundary wavelength between the reflection wavelength and the transmission wavelength of the second transflector, and the boundary wavelength between the reflection wavelength and the transmission wavelength of the second transflector is smaller than the second transflector. The wavelength of the light emitted by the side light source, the wavelength of the light emitted by the second side light source is smaller than the boundary wavelength between the reflection wavelength and the transmission wavelength of the third transflector, and the boundary between the reflection wavelength and the transmission wavelength of the third transflector The wavelength is smaller than the wavelength of the light emitted by the third side light source.

In the above-mentioned multi-mode endoscope light source device, the transflector is a dichroic mirror.

In the above-mentioned multi-mode endoscope light source device, the first collimating lens is provided at the light exit end of the end light source, and the second collimating lens is provided at the light entrance end of the exit optical cable. A collimating lens 3 is arranged at the light output end.

The first collimating lens changes the light emitted by the end light source into a parallel beam; the number of collimating lenses is equal to the number of the side light sources and is set in one-to-one correspondence, and the light emitted by the side light source becomes a parallel beam; the collimating lens The second couples the passing parallel beam into the outgoing fiber optic cable. The first collimating lens can be a plurality of pieces to form a collimating lens group, the second collimating lens can be a plurality of pieces to form a collimating lens group, and the third collimating lens corresponding to each side light source can be a plurality of pieces to form a collimating lens Group.

In the above-mentioned multi-mode endoscope light source device, the box is provided with a light absorbing part 1 which is arranged opposite to the plurality of side light sources and is used for absorbing excess light.

The third side light source emits light to the third transflector through the collimating lens 3 arranged opposite to the third side light source. At this time, most of the light is reflected to the collimating lens 2, and only a small part of the light is transmitted to the absorption light Part one is absorbed by the light absorbing part one. The second side light source emits light to the second transflector through the collimating lens 3 disposed opposite to the second side light source. At this time, most of the light is reflected to the collimating lens 2, and only a small part of the light is transmitted to the absorption light Part one is absorbed by the light absorbing part one. The first side light source emits light to the first transflector through the collimating lens 3 arranged opposite to the first side light source. At this time, most of the light is reflected to the collimating lens 2, and only a small part of the light is transmitted to the light-absorbing body. Part one is absorbed by the light absorbing part one. The end light source emits light forward through the collimating lens 1, and most of the light transmits the first transflector, the second transflector, the third transflector to the collimating lens 2 in sequence, and only a small part of the light passes through the first transflector. The transflector, the second transflector, and the third transflector reflect to the light absorbing part and are absorbed by the light absorbing part.

Effectively ensure that the illumination light emitted from the outgoing optical cable is the light of the expected wavelength combination.

In the above-mentioned multi-mode endoscope light source device, the second light absorbing part, the third light absorbing part and the fourth light absorbing part are further arranged in the box, and the second light absorbing part is arranged at several side light sources, and the light absorbing part The third part is arranged at the end light source, and the fourth light absorbing part is arranged at the outgoing optical cable. Light-absorbing part 1, light-absorbing part 2, light-absorbing part 3 and light-absorbing part 4 are made of light-absorbing materials such as black nanomaterials, black flannel materials, etc., which do not produce mapping and reflection, and can prevent stray light from being irradiated to the external environment through the ventilation holes. Prevent light pollution.

Compared with the prior art, the multi-mode endoscope light source device has the following advantages: all light sources are lit at the same time during operation, different light radiation ratios correspond to different lighting modes, mode switching only needs to adjust the light source current, and the response speed is fast ; The overall brightness is high, the modes are rich, and it can meet various diagnostic needs; and the structure is compact, without moving parts, and the reliability is good; the light absorbing parts set can suppress multiple scattering, and ensure that the illumination light emitted from the outgoing optical cable is of the expected wavelength combination. light, thereby increasing the contrast of the image.

Description of drawings

FIG. 1 is a partial structural schematic diagram of a preferred embodiment provided by the present invention.

FIG. 2 is a schematic structural diagram of a preferred embodiment provided by the present invention.

In the figure, 1, the box body; 2, the outgoing optical cable; 3, the end light source; 4, the first side light source; 5, the second side light source; 6, the third side light source; 7, the first transflector ; 8, the second transflector; 9, the third transflector; 10, the collimating lens 1; 11, the collimating lens 2; 12, the collimating lens 3; 13, the light absorbing part 1; 14, the light absorbing part 2; 15. Light-absorbing part three; 16. Light-absorbing part four.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

Example 1

The multi-mode endoscope light source device shown in FIG. 1 includes a box body 1 and an outgoing optical cable 2. The light input end of the outgoing optical cable 2 extends into the box body 1, and the box body 1 is provided with an end light source 3 and several Side light source, the end light source 3 is arranged opposite the light input end, and several side light sources are located on the side of the line connecting the end light source 3 and the light input end of the outgoing optical cable 2 and are arranged in sequence along the line, and the end light source 3 and the light input end are arranged in sequence. Between the light ends, there are a number of transflectors that are equal in number to the side light sources and are arranged in a one-to-one correspondence for reflecting the light emitted by the corresponding side light sources to the light entrance end, and the transflectors are located behind the transflectors. The light reflected by all the transflectors at the end and the light emitted by the light source 3 at the end. That is, the transflector in this embodiment transmits light with a wavelength greater than the boundary wavelength between the transflector's transmission wavelength and the reflection wavelength, and reflects light with a wavelength smaller than the boundary wavelength between the transflector's transmission wavelength and the reflection wavelength.

Among them, the light source brightness of the end light source 3 can be finely adjusted within the output range of 0-100%, the light source brightness of each side light source can be finely adjusted within the output range of 0-100%, and the brightness of each light source is adjusted separately. It is not affected by the adjustment of other light sources, and the adjustment method is realized by changing the voltage across the light source.

As shown in Figure 1, the end light source 3 is located at the rear, the outgoing optical cable 2 is located at the front, several side light sources are arranged in sequence from back to front, and several side light sources are from back to front according to the wavelength of the light emitted from the longest to the Arranged in order, the wavelength of the light emitted by the end light source 3 is greater than the wavelength of the light emitted by the side light source.

The light emitted by the end light source 3 is perpendicular to the end face of the light entrance end, and the light emitted by the side light source is reflected by the transflector and is perpendicular to the end face of the light entrance end. The light emitted by the end light source 3 sequentially transmits several transflectors and then enters the light entrance end; the light emitted by the side light source is reflected by the transflector arranged opposite to the side light source, and is transmitted in front of the side light source. All the transflectors in the part are incident to the light entrance end of the outgoing optical cable 2 . The front part of the transflector has a reflection plane, and the side light sources and the outgoing optical cable 2 arranged opposite to the transflector are located on the same side of the reflection plane.

Let the wavelength of the light emitted by the light source be λ1, and the boundary wavelength between the transmitted wavelength and the reflected wavelength of the transflector is λ2. When λ2 < λ1, the light emitted by the light source transmits the transflector, and when λ2 > λ1, the light emitted by the light source is Transflector reflection.

As shown in Figures 1 and 2, there are 3 side light sources: the first side light source 4, the second side light source 5 and the third side light source 6 are arranged in sequence from back to front, and there are 3 transflectors : a first transflector 7 arranged opposite to the first side light source 4, a second transflector 8 arranged opposite to the second side light source 5, and a third transflector arranged opposite to the third side light source 6 9. The first transflector 7, the second transflector 8 and the third reflector are plate-shaped, and the first transflector 7, the second transflector 8 and the third reflector are dichroic mirrors, and the colors are separated. The mirror is a coated glass slide.

In this embodiment, the wavelength of the light emitted by the end light source 3 is greater than the boundary wavelength between the reflection wavelength and the transmission wavelength of the first transflector 7 , and the boundary wavelength between the emission wavelength and the transmission wavelength of the first transflector 7 is greater than the first side part. The wavelength of the light emitted by the light source 4, the wavelength of the light emitted by the first side light source 4 is greater than the boundary wavelength between the emission wavelength and the transmission wavelength of the second transflector 8, and the boundary wavelength between the emission wavelength and the transmission wavelength of the second transflector 8 is greater than The wavelength of the light emitted by the second side light source 5, the wavelength of the light emitted by the second side light source 5 is greater than the boundary wavelength between the emission wavelength and the transmission wavelength of the third transflector 9, and the emission wavelength and transmission wavelength of the third transflector 9 The boundary wavelength is greater than the wavelength of the light emitted by the third side light source 6 .

The wavelength of light emitted by the first side light source 4 is greater than the wavelength of light emitted by the second side light source 5 , and the wavelength of light emitted by the second side light source 5 is greater than the wavelength of light emitted by the third side light source 6 . The peak radiation intensity of the end light source 3 is 1 to 1.5 times the peak radiation intensity of the first side light source 4; the peak radiation intensity of the first side light source 4 is 2 to 3 times the peak radiation intensity of the second side light source 5; The peak radiation intensity of the second side light source 5 is 3 to 5 times the peak radiation intensity of the third side light source 6 .

The light emitted by the end light source 3 transmits the first transflector 7, the second transflector 8 and the third transflector 9, and the light emitted by the first side light source 4 is reflected by the first transflector 7 and then transmitted The second transflector 8 and the third transflector 9, the light emitted by the second side light source 5 is reflected by the second transflector 8 and then transmitted through the third transflector 9, and the light emitted by the third side light source 6 The light is reflected by the third transflector 9 .

The wavelength of the light emitted by the end light source 3 is 600-660 nm, the wavelength of the light emitted by the first side light source 4 is 500-550 nm, the wavelength of the light emitted by the second side light source 5 is 430-470 nm, and the wavelength of the light emitted by the third side light source 6 is 430-470 nm. The wavelength of light is 380 to 440 nm.

The boundary line between the transmission wavelength and the reflection wavelength of the first transflector 7 is one half of the sum of the wavelength of the light emitted by the end light source 3 and the wavelength of the light emitted by the first side light source 4, and the second transflector 8 The boundary line between the transmission wavelength and the reflection wavelength is half of the sum of the wavelength of the light emitted by the first side light source 4 and the wavelength of the light emitted by the second side light source 5, and the transmission wavelength and the reflection wavelength of the third transflector 9 The dividing line is one half of the sum of the wavelength of the light emitted by the second side light source 5 and the wavelength of the light emitted by the third side light source 6 .

When the wavelength of the light emitted by the end light source 3 is 600 nm, the wavelength of the light emitted by the first side light source 4 is 500 nm, the wavelength of the light emitted by the second side light source 5 is 450 nm, and the wavelength of the light emitted by the third side light source 6 is 400 nm , the boundary line between the transmission wavelength and the reflection wavelength of the first transflector 7 is (500+600)/2=550nm, and the boundary line between the transmission wavelength and the reflection wavelength of the second transflector 8 is (500+450)/ 2=475nm, and the boundary line between the transmission wavelength and the reflection wavelength of the third transflector 9 is (450+400)/2=425nm.

As shown in Figures 1 and 2, a collimating lens 10 is provided at the light exit end of the end light source 3, a collimating lens 2 11 is provided at the light entrance end of the outgoing optical cable 2, and a light exit end of the side light source is provided with Collimating lens three 12 . The collimating lens 1 10 changes the light emitted by the end light source 3 into a parallel beam; the number of the collimating lens 3 12 is equal to the number of the side light sources and is set in one-to-one correspondence, so that the light emitted by the side light source becomes a parallel beam; The second collimating lens 11 couples the passing parallel light beam into the outgoing optical cable 2 . The first collimating lens 10 can be formed by a plurality of pieces to form a collimating lens group, the second collimating lens 11 can be formed by a plurality of pieces to form a collimating lens group, and the collimating lens 3 12 corresponding to each side light source can be formed by a plurality of pieces. Collimating lens group.

As shown in FIG. 2 , the box body 1 is provided with a light absorbing part 1 13 arranged opposite to several side light sources for absorbing excess light. The third side light source 6 emits light to the third transflector 9 through the collimating lens 3 12 disposed opposite to the third side light source 6 . At this time, most of the light is reflected to the collimating lens 2 11 , and only a small amount of light is emitted. Part of the light transmits to the light absorbing part 1 13 and is absorbed by the light absorbing part 1 13 . The second side light source 5 emits light to the second transflector 8 through the collimating lens 3 12 disposed opposite to the second side light source 5 . At this time, most of the light is reflected to the collimating lens 2 11 , and only a small amount of light is reflected. Part of the light transmits to the light absorbing part 1 13 and is absorbed by the light absorbing part 1 13 . The first side light source 4 emits light to the first transflector 7 through the collimating lens 3 12 disposed opposite to the first side light source 4, and most of the light is reflected to the collimating lens 2 11, and only a small amount of light is reflected. Part of the light transmits to the light absorbing part 1 13 and is absorbed by the light absorbing part 1 13 . The end light source 3 emits light forward through the collimating lens 1 10, and most of the light transmits the first transflector 7, the second transflector 8, the third transflector 9 to the collimating lens 2 11 in sequence, and only A small part of the light is reflected by the first transflector 7 , the second transflector 8 and the third transflector 9 to the light absorbing part 1 13 and absorbed by the light absorbing part 1 13 . It is effectively ensured that the illumination light emitted from the outgoing optical cable 2 is light with a desired wavelength combination.

As shown in FIG. 3 , the box body 1 is further provided with a second light absorbing part 14 , a third light absorbing part 15 and a fourth light absorbing part 16 . where the light absorbing part 416 is arranged at the exit optical cable 2 . The light absorbing part 1 13, the light absorbing part 2 14, the light absorbing part 3 15 and the light absorbing part 4 16 are made of light absorbing materials such as black nanomaterials, black flannel materials, etc., which do not produce mapping and reflection, and can prevent stray light from being irradiated through the ventilation holes to the external environment to prevent light pollution.

Specifically, as shown in FIG. 3 , the light absorbing part 2 14 is located between the side light source and the collimating lens 3 12 , and the light absorbing part 2 14 is provided with a light through hole for the light of the side light source to pass through, and the side light source emits light. The light is incident on the collimating lens 3 12 through the light hole; the light absorbing part 3 15 is arranged between the end light source 3 and the collimating lens 1 10, and the light absorbing part 4 16 is arranged between the collimating lens 2 11 and the outgoing optical cable 2 between the light entrance ends.

Among them, the end light source 3 and the side light source are both monochromatic light-emitting bodies with a half-peak width not exceeding 100 nm, so as to precisely adjust the spectrum. The radiant energy of all light sources can act on the light input end of the outgoing optical cable 2 at the same time, without cut-off, without switching, and the system is highly efficient. The light source device has a wide spectral distribution, basically covers the visible light band, can focus on displaying blood vessel information of different depths according to requirements, and can be equipped with a white light source with a high color rendering index.

Embodiment 2

The structural principle of this embodiment is basically the same as that of the first embodiment. The difference is that several side light sources are arranged in order from the back to the front according to the wavelength of the light emitted by them, and the wavelength of the light emitted by the end light source is less than The wavelength of light emitted by the side light source.

Let the wavelength of the light emitted by the light source be λ1, and the boundary wavelength between the transmission wavelength and the reflected wavelength of the transflector is λ2. When λ1 < λ2, the light emitted by the light source transmits the transflector, and when λ1 > λ2, the light emitted by the light source is Transflector reflection. That is, the transflector in this embodiment reflects light with a wavelength greater than the boundary wavelength between the transmission wavelength and the reflection wavelength of the transflector, and light with a transmission wavelength smaller than the boundary wavelength between the transmission wavelength and the reflection wavelength of the transflector.

Specifically, there are three side light sources in this embodiment: the first side light source 4, the second side light source 5 and the third side light source 6, which are arranged in sequence from back to front, and three transflectors: A first transflector 7 arranged opposite to the first side light source 4 , a second transflector 8 arranged opposite to the second side light source 5 , and a third transflector 9 arranged opposite to the third side light source 6 , the first transflector 7, the second transflector 8 and the third reflector are plate-shaped, and the first transflector 7, the second transflector 8 and the third reflector are dichroic mirrors. A coated glass slide.

The wavelength of the light emitted by the end light source 3 is smaller than the boundary wavelength of the reflection wavelength and the transmission wavelength of the first transflector 7, and the boundary wavelength of the reflection wavelength and the transmission wavelength of the first transflector 7 is smaller than the wavelength of the light emitted by the first side light source 4. wavelength, the wavelength of the light emitted by the first side light source 4 is smaller than the boundary wavelength between the reflection wavelength and the transmission wavelength of the second transflector 8, and the boundary wavelength between the reflection wavelength and the transmission wavelength of the second transflector 8 is smaller than the second side light source. 5. The wavelength of the light emitted by the second side light source 5 is smaller than the wavelength of the boundary between the reflection wavelength and the transmission wavelength of the third transflector 9, and the boundary wavelength between the reflection wavelength and the transmission wavelength of the third transflector 9 is smaller than the The wavelength of the light emitted by the three side light sources 6 .

The light emitted by the end light source 3 transmits the first transflector 7, the second transflector 8 and the third transflector 9, and the light emitted by the first side light source 4 is reflected by the first transflector 7 and then transmitted In the second transflector 8 and the third transflector 9 , the light emitted by the second side light source 5 is reflected by the second transflector 8 and then transmits through the third transflector 9 .

In this embodiment, the wavelength of the light emitted by the end light source 3 is 380-440 nm, the wavelength of the light emitted by the first side light source 4 is 430-470 nm, the wavelength of the light emitted by the second side light source 5 is 500-550 nm, and the wavelength of the light emitted by the second side light source 5 is 500-550 nm. The wavelength of light emitted from the side light source 6 is 600 to 660 nm.

A collimating lens 1 10 is arranged at the light exit end of the end light source 3 , a collimating lens 2 11 is arranged at the light entrance end of the outgoing optical cable 2 , and a collimating lens 3 12 is arranged at the light exit end of the side light source. The collimating lens 1 10 changes the light emitted by the end light source 3 into a parallel beam; the number of the collimating lens 3 12 is equal to the number of the side light sources and is set in one-to-one correspondence, so that the light emitted by the side light source becomes a parallel beam; The second collimating lens 11 couples the passing parallel light beam into the outgoing optical cable 2 . The first collimating lens 10 can be formed by a plurality of pieces to form a collimating lens group, the second collimating lens 11 can be formed by a plurality of pieces to form a collimating lens group, and the collimating lens 3 12 corresponding to each side light source can be formed by a plurality of pieces. Collimating lens group.

The end light source 3 and the side light source are both monochromatic illuminants with a half-peak width not exceeding 100 nm, wherein the light source brightness of the end light source 3 can be finely adjusted within the output range of 0-100%. The brightness of the light source can be finely adjusted within the output range of 0-100%. The brightness of each light source is adjusted independently and is not affected by the adjustment of other light sources. The adjustment method is realized by changing the voltage across the light source. The radiant energy of all light sources can act on the light input end of the outgoing optical cable 2 at the same time, without cut-off, without switching, and the system is highly efficient. The light source device has a wide spectral distribution, basically covers the visible light band, can focus on displaying blood vessel information of different depths according to requirements, and can be equipped with a white light source with a high color rendering index.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (10)

1. a kind of multimode endoscope light source unit, including cabinet (1) and outgoing optical cable (2), the light inlet of outgoing optical cable (2) Protrude into cabinet (1), which is characterized in that an end light source (3) and several side light sources, institute are equipped in the cabinet (1) The end light source (3) stated is oppositely arranged with light inlet, and several side light sources are located at end light source (3) and light inlet line Side and set gradually along the line, be equipped between the end light source (3) and light inlet several with side quantity of light source It is equal and be arranged in a one-to-one correspondence for the light that the side light source for setting of being corresponding to it is issued to be reflexed to the saturating of light inlet Reflector, the light and end light source (3) hair that all transflection beams that the transflection beam transmission is located at the rear part are reflected Light out.

2. multimode endoscope light source unit according to claim 1, which is characterized in that the side light source is 2-6； The wavelength that several side light sources emit beam by it back to front is arranged successively from long to short, end light source (3) hair The wavelength of light is greater than the wavelength that side light source emits beam out.

3. multimode endoscope light source unit according to claim 2, which is characterized in that the side light source is 3: by The first side light source (4), the second side light source (5) and the third side light source (6) set gradually forward afterwards, the transflector Body is 3: the first transflection beam (7) for being oppositely arranged with the first side light source (4) is oppositely arranged with the second side light source (5) The second transflection beam (8) and the third transflection beam (9) that is oppositely arranged with third side light source (6), the end light source (3) wavelength to emit beam is greater than the reflection wavelength of the first transflection beam (7) and the boundary wavelength of transmission peak wavelength, and described first thoroughly The reflection wavelength of reflector (7) and the boundary wavelength of transmission peak wavelength are greater than the wavelength that the first side light source (4) emits beam, described The wavelength that first side light source (4) emits beam is greater than the reflection wavelength of the second transflection beam (8) and the boundary wave of transmission peak wavelength Long, the reflection wavelength of the second transflection beam (8) and the boundary wavelength of transmission peak wavelength are greater than the second side light source (5) and issue light The wavelength of line, the wavelength that second side light source (5) emits beam are greater than reflection wavelength and the transmission of third transflection beam (9) The boundary wavelength of wavelength, the reflection wavelength of the third transflection beam (9) and the boundary wavelength of transmission peak wavelength are greater than third side The wavelength that light source (6) emits beam.

4. multimode endoscope light source unit according to claim 3, which is characterized in that the end light source (3) issues light The wavelength of line is 600~660nm, and the wavelength that first side light source (4) emits beam is 500~550nm, described second side The wavelength that portion's light source (5) emits beam be 430~470nm, the wavelength that third side light source (6) emits beam be 380~ 440nm。

5. multimode endoscope light source unit according to claim 4, which is characterized in that the first transflection beam (7) The line of demarcation of transmission peak wavelength and reflection wavelength is that the wavelength that end light source (3) emits beam and the first side light source (4) issue light The half of the sum of the wavelength of line, the transmission peak wavelength of the second transflection beam (8) and the line of demarcation of reflection wavelength are first The half of the sum of the wavelength that the wavelength and the second side light source (5) that side light source (4) emits beam emit beam, described The line of demarcation of the transmission peak wavelengths of three transflection beams (9) and reflection wavelength is the wavelength that the second side light source (5) emits beam and the The half of the sum of the wavelength that three side light sources (6) emit beam.

6. multimode endoscope light source unit according to claim 2, which is characterized in that several side light sources from it is rear toward The preceding wavelength to emit beam by it is arranged successively from short to long, and the wavelength that the end light source (3) emits beam is less than side light The wavelength that source emits beam.

7. multimode endoscope light source unit according to claim 6, which is characterized in that the side light source is 3: by The first side light source (4), the second side light source (5) and the third side light source (6) set gradually forward afterwards, the transflector Body is 3: the first transflection beam (7) for being oppositely arranged with the first side light source (4) is oppositely arranged with the second side light source (5) The second transflection beam (8) and the third transflection beam (9) that is oppositely arranged with third side light source (6), the end light source (3) wavelength to emit beam is less than the reflection wavelength of the first transflection beam (7) and the boundary wavelength of transmission peak wavelength, and described first thoroughly The reflection wavelength of reflector (7) and the boundary wavelength of transmission peak wavelength are described less than the wavelength that the first side light source (4) emits beam The wavelength that first side light source (4) emits beam is less than the reflection wavelength of the second transflection beam (8) and the boundary wave of transmission peak wavelength Long, the reflection wavelength of the second transflection beam (8) and the boundary wavelength of transmission peak wavelength issue light less than the second side light source (5) The wavelength of line, the wavelength that second side light source (5) emits beam are less than reflection wavelength and the transmission of third transflection beam (9) The boundary wavelength of wavelength, the reflection wavelength of the third transflection beam (9) and the boundary wavelength of transmission peak wavelength are less than third side The wavelength that light source (6) emits beam.

8. multimode endoscope light source unit according to claim 1, which is characterized in that the end light source (3) goes out light It is equipped with collimation lens one (10) at end, is equipped with collimation lens two (11), the side light at the light inlet of outgoing optical cable (2) Going out for source is equipped with collimation lens three (12) at light end.

9. multimode endoscope light source unit according to claim 1, which is characterized in that be equipped in the cabinet (1) with The light absorption unit one (13) for being used to absorb extra light that several side light sources are oppositely arranged.

10. multimode endoscope light source unit according to claim 9, which is characterized in that be additionally provided in the cabinet (1) Light absorption unit two (14), light absorption unit three (15) and light absorption unit four (16), the light absorption unit two (14) are set at several side light sources, The light absorption unit three (15) is set at end light source (3), and the light absorption unit four (16) is set at outgoing optical cable (2).