Prism fixing device and spectroscopic imaging system thereof

Abstract

The present invention provides a prism fixing device and a spectroscopic imaging system thereof. The prism fixing device comprises: a prism base, a limit baffle and an elastic fixing device; the prism base is provided with a boss for placing the prism; the boss is provided with limit baffles on opposite sides for fixing the prism; the elastic fixing device is fixed to the other two sides of the boss for clamping the prism, which can facilitate the disassembly of the prism lens and avoid damage to the prism lens.

Description

Technical Field

[0001] The invention relates to the field of optical instruments, and in particular to a prism fixing device and a spectroscopic imaging system thereof. Background Art

[0002] The function of the cubic beam splitter is to split a beam of light into two beams. It is widely used in optical systems. At present, the relevant prism fixing methods in optical machine design are generally mechanical rigid fixation or adhesive fixation. The disadvantage of the adhesive fixation method is that it is not conducive to the disassembly of the prism lens, and adhesive fixation cannot meet the high-precision positioning requirements. The mechanical rigid fixation method will bear relatively large stress, especially when vibrating or falling, the stress will be greater, which will cause damage to the prism lens. Summary of the invention

[0003] The main purpose of the embodiments of the present invention is to provide a prism fixing device and a spectroscopic imaging system thereof, so as to facilitate the disassembly of the prism lens, realize the precise positioning of the prism, and avoid the damage of the prism lens.

[0004] In order to achieve the above-mentioned object, an embodiment of the present invention provides a prism fixing device, comprising: a prism base, a limit stopper and an elastic fixing device;

[0005] The prism base is provided with a boss for placing the prism;

[0006] The two opposite sides of the boss are provided with limit blocks for fixing the prism;

[0007] The elastic fixing device is fixed to the other two sides of the boss and is used for clamping the prism.

[0008] The prism fixing device of the embodiment of the present invention comprises: a prism base, a stopper and an elastic fixing device. The prism base is provided with a boss for placing the prism, and the boss is provided with stoppers on opposite sides for fixing the prism; the elastic fixing device is fixed to the other two sides of the boss for clamping the prism, which can facilitate the disassembly of the prism lens, realize the precise positioning of the prism, and avoid damage to the prism lens.

[0009] The embodiment of the present invention further provides a spectroscopic imaging system based on a prism fixing device, comprising:

[0010] An imaging device for generating an image based on incident light;

[0011] A beam splitter prism connected to the imaging device is used to split the image to generate a reflected image and a refracted image;

[0012] The prism fixing device as described above is used to fix the beam splitting prism;

[0013] A visible light filter connected to the beam splitter prism is used to filter the reflected image to generate a visible light image;

[0014] A fluorescence filter connected to the beam splitter prism is used to filter the refracted image to generate a fluorescence image;

[0015] A visible light camera connected to the visible light filter is used to generate a visible light molecular image based on the visible light image;

[0016] A fluorescence camera connected to a fluorescence filter is used to generate a fluorescent molecular image based on the fluorescence image.

[0017] The spectroscopic imaging system based on the prism fixing device of the embodiment of the present invention includes an imaging device, which is used to generate an image according to the incident light; a spectroscopic prism connected to the imaging device, which is used to split the image to generate a reflected image and a refracted image; the prism fixing device as described above is used to fix the spectroscopic prism; a visible light filter connected to the spectroscopic prism, which is used to filter the reflected image to generate a visible light image; a fluorescent filter connected to the spectroscopic prism, which is used to filter the refracted image to generate a fluorescent image; a visible light camera connected to the visible light filter, which is used to generate a visible light molecular image according to the visible light image; and a fluorescent camera connected to the fluorescent filter, which is used to generate a fluorescent molecular image according to the fluorescent image, which can facilitate the disassembly of the prism lens and realize the precise positioning of the prism to accurately split the light. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of a prism fixing device fixing a prism according to an embodiment of the present invention;

[0020] Figure 2A is a front view of a prism fixing device for fixing a prism according to an embodiment of the present invention;

[0021] Figure 2B is a left side view of a prism fixing device for fixing a prism according to an embodiment of the present invention;

[0022] Figure 2C is a top view of a prism fixing device fixing a prism according to an embodiment of the present invention;

[0023] Figure 3A is a diagram of a fixing process of a prism by a prism fixing device according to another embodiment of the present invention;

[0024] Figure 3Bis a cross-sectional view of a prism fixing device fixing a prism along the AA section line according to another embodiment of the present invention;

[0025] Figure 4 Schematic diagram of a spectroscopic imaging system based on a prism fixing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In view of the fact that the prior art is not conducive to the disassembly of lenses, cannot meet the high-precision positioning requirements, and is prone to cause damage to the lenses, an embodiment of the present invention provides a prism fixing device that can facilitate the disassembly of prism lenses, achieve precise positioning of prisms, and avoid damage to prism lenses.

[0028] Figure 1 Schematic diagram of a prism fixing device for fixing a prism according to an embodiment of the present invention. Figure 2A 4 is a front view of a prism fixing device according to an embodiment of the present invention. Figure 2B It is a left view of a prism fixing device according to an embodiment of the present invention. Figure 2C FIG. 2 is a top view of a prism fixing device for fixing a prism according to an embodiment of the present invention. Figure 1 , Figure 2A , Figure 2B and Figure 2C As shown, the prism fixing device includes: a prism base 1, a limit baffle 6 and an elastic fixing device 2. The prism base 1 is provided with a boss 7 for placing the prism 3. The boss 7 is provided with limit baffles 6 on opposite sides for fixing the prism 3. The elastic fixing device 2 is fixed to the other two sides of the boss 7 for clamping the prism 3. In this embodiment, the boss 7 is preferably located at the center of the prism base 1 and is consistent with the size of the corresponding mirror surface of the prism 3. The precise positioning of the prism can be achieved by controlling the height of the boss 7, the length of the elastic fixing device 2 and the surface roughness of the contact surface between the prism base 1 and the prism 3. Among them, the preferred ratio range of the height of the boss 7 to the height of the prism 3 is 0.15 to 0.35, the preferred ratio range of the length of the elastic fixing device 2 to the height of the prism 3 is 0.43 to 0.53, and the preferred range of the surface roughness is Ra0.8 to Ra1.6.

[0029] Figure 3A FIG. 2 is a diagram showing the fixing process of a prism by a prism fixing device according to another embodiment of the present invention. Figure 3AAs shown, in addition to the prism base 1 and the elastic fixing device 2 in the previous embodiment, the prism fixing device also includes a cubic cage 4, and an opening is provided on one surface of the cubic cage 4, through which the prism 3 is placed into the cubic cage 4. In specific implementation, the technician assembles the prism 3, the prism base 1, the limit stopper 6 and the elastic fixing device 2 and then places them into the cubic cage 4, and the size of the cubic cage 4 can be selected according to the volume of the prism 3.

[0030] Among them, holes 8 for light to enter and exit are provided on one face opposite to the opening of the cubic cage body 4 and two opposite faces among the four faces adjacent to the opening. Alternatively, holes 8 for light to enter and exit are provided on three faces adjacent to the opening. Alternatively, holes 8 for light to enter and exit are provided on the remaining faces except the face where the opening is located.

[0031] In one embodiment, the cubic cage body 4 further includes: a prism support surface 9 and an elastic rubber pad 5 disposed on the prism support surface 9. The prism support surface 9 is used to support the prism 3 and is located on the bottom surface ( Figure 3A The upper surface of the prism support surface 9 is not higher than the lowest point of the hole 8. The elastic rubber pad 5 is used to prevent the prism from being damaged and to avoid the problem of prism splitting angle deviation caused by vibration during assembly, use and transportation of the prism 3. When the hole 8 is provided on the side opposite to the opening of the cubic cage 4, the prism support surface 9 and the elastic rubber pad 5 are both provided with openings corresponding to the position and size of the hole 8 for light to enter and exit the cubic cage 4. Among them, the total height of the prism base 1 after the prism 3 is installed is less than the height of the cubic cage 4, leaving a certain space for the elastic rubber pad 5.

[0032] like Figure 3A As shown, the prism base 1 is also provided with a plurality of screw fixing holes. The prism base 1 is fixed to the cubic cage body 4 through screws and the screw fixing holes.

[0033] Figure 3B FIG. 2 is a cross-sectional view of a prism fixing device fixing a prism along the AA section line according to another embodiment of the present invention. Figure 1 and Figure 3B As shown, an elastic rubber pad 5 is provided between the prism support surface 9 of the cubic cage body 4 and the prism, and the interference is 0.2 mm, and the interference can be designed to have different values ​​according to the material of the rubber pad. The four-directional limiting surfaces 17 of the prism base boss 7 can achieve the overall precise positioning of the prism fixing device through the precise matching of the four limiting surfaces 17 and the four inner surfaces of the cubic cage body 4.

[0034] In one embodiment, the elastic fixing device 2 is a spring sheet, and preferably two spring sheets are arranged side by side on each of the other two sides of the boss 3, but it is not limited thereto. The elastic force of the spring sheet can be designed and determined based on mechanical analysis. Correspondingly, spring sheet fixing holes are provided on the other two sides of the boss, and the spring sheet is fixed to the other two sides of the boss through screws and the spring sheet fixing holes. One end of the spring sheet protrusion clamps the prism 3, and the other end is fixed to the boss 7.

[0035] In summary, the prism fixing device of the embodiment of the present invention comprises: a prism base, a stopper and an elastic fixing device. The prism base is provided with a boss for placing the prism, and the boss is provided with stoppers on opposite sides for fixing the prism; the elastic fixing device is fixed to the other two sides of the boss for clamping the prism, which can facilitate the disassembly of the prism lens, realize the precise positioning of the prism, and avoid damage to the prism lens.

[0036] Figure 4 Schematic diagram of a spectroscopic imaging system based on a prism fixing device according to an embodiment of the present invention. Figure 4 As shown, the spectroscopic imaging system based on the prism fixing device includes: an imaging device 11, used to generate an image according to the incident light; a spectroscopic prism 3 connected to the imaging device 11, used to split the image to generate a reflected image and a refracted image; the prism fixing device 12 as described above, used to fix the spectroscopic prism 3; a visible light filter 13 connected to the spectroscopic prism 3, used to filter the reflected image to generate a visible light image; a fluorescent filter 14 connected to the spectroscopic prism 3, used to filter the refracted image to generate a fluorescent image; a visible light camera 15 connected to the visible light filter 13, used to generate a visible light molecular image according to the visible light image; and a fluorescent camera 16 connected to the fluorescent filter 14, used to generate a fluorescent molecular image according to the fluorescent image.

[0037] Depend on Figure 4 It can be seen that there are imaging devices 11 (lens), visible light cameras 15 and fluorescent (near infrared) cameras 16 in three directions of the prism 3. The prism 3 splits the image generated by the imaging device 11 by 90 degrees, and the generated reflected image is filtered by the visible light filter 13 and then emitted to the visible light camera 15, and the generated refracted image is filtered by the fluorescent filter 14 and then emitted to the fluorescent camera 16.

[0038] The spectroscopic imaging system based on the prism fixing device of the embodiment of the present invention includes an imaging device, which is used to generate an image according to the incident light; a spectroscopic prism connected to the imaging device, which is used to split the image to generate a reflected image and a refracted image; the prism fixing device as described above is used to fix the spectroscopic prism; a visible light filter connected to the spectroscopic prism, which is used to filter the reflected image to generate a visible light image; a fluorescent filter connected to the spectroscopic prism, which is used to filter the refracted image to generate a fluorescent image; a visible light camera connected to the visible light filter, which is used to generate a visible light molecular image according to the visible light image; and a fluorescent camera connected to the fluorescent filter, which is used to generate a fluorescent molecular image according to the fluorescent image, which can facilitate the disassembly of the prism lens, realize the precise positioning of the prism, and further realize the precise spectroscopic of the light.

[0039] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A prism fixing device, characterized in that: include: Prism base, limit stopper, cubic cage and elastic fixing device; The prism base is provided with a boss for placing the prism; The boss is provided with limit blocks on opposite sides thereof for fixing the prism; The elastic fixing device is fixed to the other two sides of the boss to clamp the prism; An opening is provided on one surface of the cubic cage, and the prism is placed into the cubic cage through the opening; The cubic cage body also includes: a prism support surface and an elastic rubber pad arranged on the prism support surface, a hole is arranged on a side opposite to the opening of the cubic cage body, and openings corresponding to the position and size of the hole are arranged on the prism support surface and the elastic rubber pad for allowing light to enter and exit the cubic cage body; the prism support surface is located between the side opposite to the opening and the prism, and the upper surface of the prism support surface is not higher than the lowest point of the hole; the elastic rubber pad is used to prevent damage to the prism and avoid the problem of prism splitting angle deviation caused by vibration during assembly, use and transportation of the prism; The total height of the prism base after the prism is installed is less than the height of the cubic cage; The boss is provided with limiting surfaces in four directions, and the four limiting surfaces are precisely matched with the four inner surfaces of the cubic cage body.

2. The prism fixing device according to claim 1, characterized in that: Holes for light to enter and exit are arranged on one surface opposite to the opening and on two opposite surfaces of the four surfaces adjacent to the opening.

3. The prism fixing device according to claim 1, characterized in that: Holes for light to enter and exit are arranged on the three surfaces adjacent to the opening.

4. The prism fixing device according to claim 1, characterized in that: All the remaining surfaces except the surface where the opening is located are provided with holes for light to enter and exit.

5. The prism fixing device according to any one of claims 2 to 4, characterized in that: The prism base is also provided with a plurality of screw fixing holes; The prism base is fixed to the cubic cage body through screws and the screw fixing holes.

6. The prism fixing device according to claim 1, characterized in that: The elastic fixing device is a spring sheet.

7. The prism fixing device according to claim 6, characterized in that: The other two sides of the boss are provided with spring sheet fixing holes, and the spring sheet is fixed to the other two sides of the boss through screws and the spring sheet fixing holes.

8. A spectroscopic imaging system based on a prism fixing device, characterized in that: include: An imaging device for generating an image based on incident light; A beam splitter prism connected to the imaging device, used to split the image to generate a reflected image and a refracted image; The prism fixing device according to any one of claims 1 to 7, used to fix the beam splitting prism; A visible light filter connected to the beam splitter prism, used to filter the reflected image to generate a visible light image; A fluorescent filter connected to the beam splitter prism, used to filter the refracted image to generate a fluorescent image; A visible light camera connected to the visible light filter, used to generate a visible light molecular image based on the visible light image; The fluorescence camera connected to the fluorescence filter is used to generate a fluorescence molecular image according to the fluorescence image.

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