A multi-spectrum cold light source device

Abstract

The present invention provides a multi-spectral cold light source device, comprising a turntable, a driving mechanism, an optical fiber light guide, a coupling lens, a long-wave pass filter, a first light-emitting device, and a second light-emitting device. The driving mechanism is used to drive the turntable to rotate. A plane reflector is installed on the turntable, and the turntable is provided with a through hole. The optical fiber light guide, the coupling lens, and the long-wave pass filter are located on the same straight line. When the turntable is rotated so that the through hole is located between the coupling lens and the long-wave pass filter, the light emitted by the second light-emitting device is reflected by the long-wave pass filter and then coupled to the optical fiber light guide through the through hole by the coupling lens. When the turntable is rotated so that the plane reflector is located between the coupling lens and the long-wave pass filter, the light emitted by the first light-emitting device is reflected by the plane reflector to the coupling lens and then coupled to the optical fiber light guide. The beneficial effects of the present invention are as follows: the multi-spectral cold light source device of the present invention has a simple overall structure and solves the shortcomings of insufficient optical power and dim narrow-band light illumination.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a multi-spectrum cold light source device. Background Art

[0002] Endoscopes need to use cold light sources to provide illumination for the tissues to be observed. Today's medical technology is no longer satisfied with single white light source illumination imaging, and special narrow-band spectrum illumination is also needed to emphasize mucosa, blood vessels, and diseased tissues. For example, hemoglobin has extreme absorption peaks at 540nm and 415nm. Using illumination light in this band can greatly increase the contrast of blood vessels in the image. Traditional multi-spectral cold light sources mostly use xenon lamps equipped with multiple narrow-band filters. The xenon lamp has a short life and a complex overall structure. In addition, due to the use of narrow-band filters to filter white light, it causes insufficient light power and dim narrow-band light illumination. Summary of the invention

[0003] The present invention provides a multi-spectral cold light source device, comprising a turntable, a driving mechanism, an optical fiber light guide, a coupling lens, a long-wave pass filter, a first light-emitting device, and a second light-emitting device. The driving mechanism is used to drive the turntable to rotate. A plane reflector is installed on the turntable, and the turntable is provided with a through hole. The optical fiber light guide, the coupling lens, and the long-wave pass filter are located on the same straight line. When the turntable is rotated so that the through hole is located between the coupling lens and the long-wave pass filter, the light emitted by the second light-emitting device is reflected by the long-wave pass filter, passes through the through hole, and is then coupled to the optical fiber light guide by the coupling lens; when the turntable is rotated so that the plane reflector is located between the coupling lens and the long-wave pass filter, the light emitted by the first light-emitting device is reflected by the plane reflector to the coupling lens and then coupled to the optical fiber light guide.

[0004] As a further improvement of the present invention, the first light-emitting device includes a white light LED light source and a first collimating lens. When the turntable is rotated so that the plane reflector is located between the coupling lens and the long-wave pass filter, the light emitted by the white light LED light source passes through the first collimating lens, is reflected by the plane reflector to the coupling lens, and then coupled to the optical fiber light guide.

[0005] As a further improvement of the present invention, the second light-emitting device includes a narrow-band blue light LED light source and a second collimating lens, and the long-wave pass filter includes a first long-wave pass filter. When the turntable is rotated so that the through hole is located between the coupling lens and the first long-wave pass filter, the light emitted by the narrow-band blue light LED light source passes through the second collimating lens, is reflected by the first long-wave pass filter, passes through the through hole, and is coupled to the optical fiber light guide by the coupling lens.

[0006] As a further improvement of the present invention, the multi-spectral cold light source device also includes a third light-emitting device, and the long-wave pass filter also includes a second long-wave pass filter. When the turntable is rotated so that the through hole is located between the coupling lens and the second collimating lens, the light emitted by the third light-emitting device is reflected by the second long-wave pass filter, passes through the through hole, and is then coupled to the optical fiber light guide by the coupling lens.

[0007] As a further improvement of the present invention, the third light-emitting device includes a narrow-band green light LED light source and a third collimating lens. When the turntable is rotated so that the through hole is located between the coupling lens and the second collimating lens, the light emitted by the narrow-band green light LED light source passes through the third collimating lens, is reflected by the second long-wave pass filter, passes through the through hole, and is coupled to the optical fiber light guide by the coupling lens.

[0008] As a further improvement of the present invention, the third light-emitting device is a solid laser light source or a semiconductor laser light source after beam expansion. When the turntable is rotated so that the through hole is located between the coupling lens and the second collimating lens, the light emitted by the solid laser light source or the semiconductor laser light source is reflected by the second long-wave pass filter, passes through the through hole, and is coupled to the optical fiber light guide by the coupling lens.

[0009] As a further improvement of the present invention, the plane reflector includes a first plane reflector and a second plane reflector, the through hole includes a first through hole and a second through hole, and the first plane reflector, the second plane reflector, the first through hole, and the second through hole are evenly distributed on the turntable.

[0010] As a further improvement of the present invention, the number of the plane reflector and the number of the through hole are one each, and the plane reflector and the through hole are evenly distributed on the turntable.

[0011] As a further improvement of the present invention, the driving mechanism is a motor.

[0012] As a further improvement of the present invention, the light incident surface of the optical fiber light guide is perpendicular to the optical axis, the angle between the turntable and the optical axis is 45°, similarly, the angle between the plane reflector on the turntable and the optical axis is also 45°, and the angle between the longwave pass filter and the optical axis is also 45°.

[0013] The beneficial effects of the present invention are: 1. The multi-spectrum cold light source device of the present invention has a simple overall structure and is easy to use, while solving the shortcomings of insufficient light power and dim narrow-band light illumination; 2. The illumination light obtained by the multi-spectrum cold light source device of the present invention can greatly improve the contrast of the image blood vessels in the image. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a principle diagram of the present invention in which the optical axis is perpendicular to the light incident surface of the optical fiber light guide;

[0015] Figure 2 It is a principle diagram of the optical path when the turntable of the present invention is switched to the through-hole state;

[0016] Figure 3 This is a principle diagram of the optical path when the turntable of the present invention is switched to the plane reflector state;

[0017] Figure 4 is a schematic diagram of the turntable 6 in Embodiment 1 of the present invention;

[0018] Figure 5 Schematic diagram of the turntable in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0019] As the first embodiment of the present invention, Figure 1 As shown, the present invention discloses a multi-spectral cold light source device, wherein the optical axis 5 is perpendicular to the light incident surface of the optical fiber light guide 8. The angle between the turntable 6 and the optical axis 5 is 45°, and similarly, the angle between the plane reflectors 3.1.1 and 3.1.2 on the turntable 6 and the optical axis 5 is also 45°. The angle between the first long-wave pass filter 3.2 and the second long-wave pass filter 3.3 and the optical axis 5 is also 45°. The motor 7 is mechanically connected to the turntable 6. When the motor 7 rotates, the turntable 6 also rotates, and the function is to switch the first plane reflector 3.1.1 and the second plane reflector 3.1.2 and the first through hole 3.1.3 and the second through hole 3.1.4.

[0020] like Figure 2 As shown, this is the state when the turntable 6 is switched to the first through hole 3.1.3, in which the cold light source can output narrow-band illumination light to the outside. The light emitted by the narrow-band blue LED light source 1.2 passes through the second collimating lens 2.2, is reflected by the first long-wave pass filter 3.2, passes through the first through hole 3.1.3, and is coupled to the optical fiber light guide 8 by the coupling lens 4, wherein the first long-wave pass filter 3.2 has the function of transmitting green light and reflecting blue light. The light emitted by the narrow-band green LED light source 1.3 passes through the third collimating lens 2.3, is reflected by the second long-wave pass filter 3.3, passes through the first through hole 3.1.3, and is coupled to the optical fiber light guide 8 by the coupling lens 4, wherein the second long-wave pass filter 3.3 has the function of reflecting green light.

[0021] like Figure 3As shown, the state when the turntable 6 is switched to the first plane reflector 3.1.1, in which the cold light source can output white light illumination. The light emitted by the white light LED light source 1.1 passes through the collimating lens 2.1 and is reflected by the plane reflector 3.1.1 to the coupling lens 4 and then coupled to the optical fiber light guide 8, wherein the first plane reflector 3.1.1 and the second plane reflector 3.1.2 are visible light reflectors.

[0022] like Figure 4 It is a schematic diagram of the turntable 6, on which the first plane reflector 3.1.1, the first through hole 3.1.3, the second plane reflector 3.1.2, and the second through hole 3.1.4 are arranged respectively.

[0023] As a second embodiment of the present invention, Figure 5 As shown, the second embodiment is a further improvement on the first embodiment, and only one through hole and one plane reflector are provided on the turntable 6.

[0024] As the third embodiment of the present invention, the third embodiment is a further improvement on the basis of the first embodiment. The narrow-band green LED light source 1.3 is replaced by a solid laser light source or a semiconductor laser light source after beam expansion, and the third collimating lens 2.3 is removed.

[0025] In the embodiment 1 of the present invention, the first plane reflector 3.1.1, the first through hole 3.1.3, the second plane reflector 3.1.2, and the second through hole 3.1.4 of the turntable 6 are required to be evenly distributed. In addition, the motor 7 can drive the turntable 6 to rotate at a high speed. For example, if the endoscope image is 60 frames per second, the rotation speed of the turntable 6 is 15 revolutions per second. Each revolution of the turntable 6 passes through the first plane reflector 3.1.1, the first through hole 3.1.3, the second plane reflector 3.1.2, and the second through hole 3.1.4, generating four states, and 15x4=60 switches will be generated within one second. If each frame of the endoscope image is synchronized with a light-emitting state of the cold light source, then the endoscope can synchronously acquire images of white light and narrow-band light in an alternating manner. At this time, the image frame rates of the narrow-band light and the white light are 30 frames per second respectively.

[0026] If the turntable 6 has only one through hole and one plane reflector as in Embodiment 2, and they are evenly distributed on the turntable 6. When the rotation speed of the turntable 6 is 30 revolutions per second, 30x2=60 switchings will occur in one second. If each frame of the endoscope image is synchronized with a light-emitting state of the cold light source, the endoscope can synchronously acquire images of white light and narrow-band light in an alternating manner, and at this time, the image frame rates of the narrow-band light and the white light are 30 frames per second respectively.

[0027] So if a is the frame rate of the endoscope image, b is the total number of through holes and plane reflectors of the turntable, and c is the rotation speed of the turntable, a=b*c, and each frame of the endoscope image is synchronized with each light-emitting state of the turntable 6 of the cold light source after rotation,

[0028] At this time, white light and narrow-band light are output in real time in an interlaced manner in each frame.

[0029] The beneficial effects of the present invention are as follows: 1. The multi-spectrum cold light source device of the present invention has a simple overall structure and is easy to use, while solving the shortcomings of insufficient optical power and dim narrow-band light illumination; 2. The illumination light obtained by the multi-spectrum cold light source device of the present invention can greatly improve the contrast of the image blood vessels in the image.

[0030] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A multi-spectral cold light source device, characterized in that: The invention comprises a rotating disk (6), a driving mechanism, an optical fiber light guide (8), a coupling lens (4), a long-wave pass filter, a first light-emitting device, and a second light-emitting device. The driving mechanism is used to drive the rotating disk (6) to rotate. A plane reflector is mounted on the rotating disk (6). The rotating disk (6) is provided with a through hole. The optical fiber light guide (8), the coupling lens (4), and the long-wave pass filter are located on the same straight line. When the rotating disk (6) is rotated so that the through hole is located between the coupling lens (4) and the long-wave pass filter, light emitted by the second light-emitting device is reflected by the long-wave pass filter, passes through the through hole, and is then coupled to the optical fiber light guide (8) by the coupling lens (4). When the rotating disk (6) is rotated so that the plane reflector is located between the coupling lens (4) and the long-wave pass filter, light emitted by the first light-emitting device is reflected by the plane reflector to the coupling lens (4), and then is coupled to the optical fiber light guide (8).

2. The multi-spectrum cold light source device according to claim 1, characterized in that: The first light emitting device comprises a white light LED light source (1.1) and a first collimating lens (2.1). When the turntable (6) is rotated so that the plane reflector is located between the coupling lens (4) and the long-wave pass filter, light emitted by the white light LED light source (1.1) passes through the first collimating lens (2.1), is reflected by the plane reflector to the coupling lens (4), and then is coupled to the optical fiber light guide (8).

3. The multi-spectrum cold light source device according to claim 1, characterized in that: The second light emitting device comprises a narrowband blue LED light source (1.2) and a second collimating lens (2.2); the long-wave pass filter comprises a first long-wave pass filter (3.2); when the turntable (6) is rotated so that the through hole is located between the coupling lens (4) and the first long-wave pass filter (3.2), the light emitted by the narrowband blue LED light source (1.2) passes through the second collimating lens (2.2), is reflected by the first long-wave pass filter (3.2), passes through the through hole, and is coupled to the optical fiber light guide (8) by the coupling lens (4).

4. The multi-spectrum cold light source device according to claim 3, characterized in that: The multi-spectral cold light source device also includes a third light emitting device, and the long-wave pass filter also includes a second long-wave pass filter (3.3). When the turntable (6) is rotated so that the through hole is located between the coupling lens (4) and the second collimating lens (2.2), light emitted by the third light emitting device is reflected by the second long-wave pass filter (3.3), passes through the through hole, and is then coupled to the optical fiber light guide (8) by the coupling lens (4).

5. The multi-spectrum cold light source device according to claim 4, characterized in that: The third light emitting device comprises a narrow-band green LED light source (1.3) and a third collimating lens (2.3). When the turntable (6) is rotated so that the through hole is located between the coupling lens (4) and the second collimating lens (2.2), light emitted by the narrow-band green LED light source (1.3) passes through the third collimating lens (2.3), is reflected by the second long-wave pass filter (3.3), passes through the through hole, and is coupled to the optical fiber light guide (8) by the coupling lens (4).

6. The multi-spectrum cold light source device according to claim 4, characterized in that: The third light emitting device is a solid laser light source or a semiconductor laser light source after beam expansion. When the turntable (6) is rotated so that the through hole is located between the coupling lens (4) and the second collimating lens (2.2), the light emitted by the solid laser light source or the semiconductor laser light source is reflected by the second long-wave pass filter (3.3), passes through the through hole, and is then coupled to the optical fiber light guide (8) by the coupling lens (4).

7. The multi-spectrum cold light source device according to claim 1, characterized in that: The plane reflector comprises a first plane reflector (3.1.1) and a second plane reflector (3.1.2); the through hole comprises a first through hole (3.1.3) and a second through hole (3.1.4); the first plane reflector (3.1.1), the second plane reflector (3.1.2), the first through hole (3.1.3), and the second through hole (3.1.4) are evenly distributed on the turntable (6).

8. The multi-spectrum cold light source device according to claim 1, characterized in that: The number of the plane reflector and the number of the through hole are one each, and the plane reflector and the through hole are evenly distributed on the rotating disk (6).

9. The multi-spectrum cold light source device according to claim 1, characterized in that: The driving mechanism is a motor (7).

10. The multi-spectrum cold light source device according to claim 1, characterized in that: The light incident surface of the optical fiber light guide (8) is perpendicular to the optical axis (5), the angle between the turntable (6) and the optical axis (5) is 45°, similarly, the angle between the plane reflector on the turntable (6) and the optical axis (5) is also 45°, and the angle between the long-wave pass filter and the optical axis (5) is also 45°.

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