CN210181308U - Optical system for material evidence search - Google Patents
Optical system for material evidence search Download PDFInfo
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- CN210181308U CN210181308U CN201921076177.4U CN201921076177U CN210181308U CN 210181308 U CN210181308 U CN 210181308U CN 201921076177 U CN201921076177 U CN 201921076177U CN 210181308 U CN210181308 U CN 210181308U
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Abstract
The utility model provides an optical system for material evidence search, including blue light fiber coupling light source, green glow fiber coupling light source, ruddiness fiber coupling light source, optic fibre, special optical fiber and ball lens, blue light fiber coupling light source, green glow fiber coupling light source and ruddiness fiber coupling light source respectively through optic fibre with special optical fiber connects, the light-emitting window of special optical fiber is located on ball lens's the focus. The transmission efficiency of the optical system of the utility model is as high as 90%; the uniformity of the output light spots is high and can reach 90 percent, and no obvious granular sensation exists; the laser with multiple wavelengths and high power can be used for material evidence searching; flexible optical fiber output, small and exquisite light-emitting opening, the on-the-spot practicality of being convenient for.
Description
Technical Field
The utility model belongs to the technical field of optical equipment, concretely relates to optical system for material evidence search.
Background
With the advance of technology, not only is high optical power required for a laser, but also improvement in uniformity of a laser beam spot is required in various fields. For example, in the field of criminal investigation and technical investigation, high-power and uniform laser is needed to properly excite the fluorescence intensity and contrast of a material to be examined so as to obtain an accurate result.
The common methods and drawbacks of obtaining uniform laser spots are as follows:
A. adopting a ground glass diffusion sheet or an opal glass diffusion sheet; the transmission efficiency is low, the uniformity of light spots is poor, and the defects are more obvious particularly when a laser light source is adopted;
B. adopting a diffraction holographic grating; the transmission efficiency can reach 90%, but the light uniformizing effect of the transmitted laser beam is poor;
C. by adopting the irregularly arranged micro-lens array sheets, the transmission efficiency can reach 90 percent, the uniformity can reach 90 percent, but the granular feeling exists;
D. adopting a micro-lens array combination; the system is complex and high in cost, and uniform light spots can be obtained only on a focal plane;
E. a liquid light guide pipe is adopted; high uniformity, but short system life, high requirements for the production process of the associated facilities, and low transmission efficiency.
In a word, at present, no multi-wavelength high-power light source device which provides high and uniform bright laser beams, simultaneously transmits flexible and uniform light optical fibers, has high transmission efficiency, is small and exquisite in light outlet and convenient to use and is practical is available.
SUMMERY OF THE UTILITY MODEL
To the above, the utility model provides an optical system for material evidence search can provide the even bright laser beam of height, and the even optical fiber transmission of flexibility simultaneously, transmission efficiency is high, and the light-emitting window is small and exquisite light, the on-the-spot practical multi-wavelength high power light source of being convenient for.
The technical scheme of the utility model is realized like this: an optical system for material evidence search comprises a blue light optical fiber coupling light source, a green light optical fiber coupling light source, a red light optical fiber coupling light source, an optical fiber, a special optical fiber and a ball lens, wherein the blue light optical fiber coupling light source, the green light optical fiber coupling light source and the red light optical fiber coupling light source are respectively connected with the special optical fiber through optical fibers, and a light outlet of the special optical fiber is positioned on a focus of the ball lens.
Preferably, the blue light fiber-coupled light source can be a single fiber-coupled semiconductor laser light source, or a fiber-coupled laser light source formed by re-combining a plurality of fiber-coupled semiconductor laser light sources, the laser wavelength is 440-450 nm, and the output power is 0.5-15W;
preferably, the green light fiber-coupled light source may be a single fiber-coupled semiconductor laser light source, or a fiber-coupled laser light source in which a plurality of fiber-coupled semiconductor laser light sources are recombined, and the laser wavelength is 515nm to 533nm, and the output power is 0.2W to 10W.
Preferably, the red light fiber-coupled light source can be a single fiber-coupled semiconductor laser light source, or a fiber-coupled laser light source formed by re-combining a plurality of fiber-coupled semiconductor laser light sources, the laser wavelength is 630-655 nm, and the output power is 0.2-5W.
Preferably, the core diameter of the optical fiber can be a single-mode optical fiber or a multi-mode optical fiber, and the numerical aperture of the optical fiber is 0.1-0.3.
Preferably, the special optical fiber is a large-core-diameter special optical fiber capable of bearing high-power laser, the core diameter of the special optical fiber is 200-600 μm, the numerical aperture of the special optical fiber is 0.2-0.5, and the transmittable wavelength of the special optical fiber is 400-2000 nm.
Preferably, the ball lens is made of glass materials such as K9, the diameter is 2 mm-5 mm, and the focal length is 1.0 mm-4.0 mm.
The utility model has the advantages that: the transmission efficiency of the optical system is as high as 90%; the uniformity of the output light spots is high and can reach 90 percent, and no obvious granular sensation exists; the laser with multiple wavelengths and high power can be used for material evidence searching; flexible optical fiber output, small and exquisite light-emitting opening, the on-the-spot practicality of being convenient for.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1-blue light fiber coupling light source, 2-green light fiber coupling light source, 3-red light fiber coupling light source, 4-optical fiber, 5-special optical fiber and 6-ball lens.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The optical system for material evidence search as shown in fig. 1 includes a blue light fiber coupling light source 1, a green light fiber coupling light source 2, a red light fiber coupling light source 3, an optical fiber 4, a special optical fiber 5, and a ball lens 6, wherein a light outlet of the special optical fiber 5 is located at a focus of the ball lens 6.
Example 1
The blue light fiber coupling light source 1 is nine fiber coupling semiconductor laser light sources, the laser wavelength of the blue light fiber coupling light source is 445nm, the single output power is 1.4W, the nine output powers are 12.6W, and the blue light fiber coupling light source is connected with the special optical fiber 5 through nine optical fibers 4.
The green light fiber coupling light source 2 is seven fiber coupling semiconductor laser light sources, the laser wavelength of the light source is 520nm, the single output power is 1W, the seven output powers are 7W, and the light source is connected with the special optical fiber 5 through seven optical fibers 4.
The red light fiber coupling light source 3 is a light source of three fiber coupling semiconductor lasers, the laser wavelength of the red light fiber coupling light source is 630nm, the single output power is 1W, the three output powers are 3W, and the red light fiber coupling light source is connected with the special optical fiber 5 through three optical fibers 4.
The optical fiber 4 is a multimode optical fiber, the core diameter of which is 105 μm, the numerical aperture of which is 0.22, and is connected with the special optical fiber 5 by welding.
The special optical fiber 5 is a large-core-diameter special optical fiber capable of bearing high-power laser, the core diameter of the special optical fiber is 400 microns, the numerical aperture of the special optical fiber is 0.3, and the transmittable wavelength of the special optical fiber is 400 nm-2000 nm.
The ball lens (6) is made of K9 material, and has a diameter of 3mm and a focal length of 2.2 mm.
After the laser passes through the optical system of the embodiment, a circular light spot with the diameter of 0.3-0.4 m and the uniformity of more than or equal to 90% is formed at the position of 1 m.
Example 2
The blue light fiber coupling light source 1 is a six-fiber coupling semiconductor laser light source, the laser wavelength of the blue light fiber coupling light source is 445nm, the single output power is 1.4W, the six output powers are 8.4W, and the blue light fiber coupling light source is connected with the special optical fiber 5 through six optical fibers 4.
The green light fiber coupling light source 2 is a four fiber coupling semiconductor laser light source, the laser wavelength is 520nm, the single output power is 1W, the four output powers are 4W, and the four fiber coupling light sources are connected with the special optical fiber 5 through four optical fibers 4.
The red light fiber coupling light source 3 is a light source of two fiber coupling semiconductor lasers, the laser wavelength of the red light fiber coupling light source is 630nm, the single output power is 1W, the two output powers are 2W, and the red light fiber coupling light source is connected with the special optical fiber 5 through two optical fibers 4.
The optical fiber 4 is a multimode optical fiber, the core diameter of which is 105 μm, the numerical aperture of which is 0.22, and is connected with the special optical fiber 5 by welding.
The special optical fiber 5 is a large-core-diameter special optical fiber capable of bearing high-power laser, the core diameter of the special optical fiber is 400 microns, the numerical aperture of the special optical fiber is 0.3, and the transmittable wavelength of the special optical fiber is 400 nm-2000 nm.
The ball lens (6) is made of K9 material, and has a diameter of 3mm and a focal length of 2.2 mm.
After the laser passes through the optical system of the embodiment, a circular light spot with the diameter of 0.3-0.4 m and the uniformity of more than or equal to 90% is formed at the position of 1 m.
Example 3
The blue light fiber coupling light source 1 is a three fiber coupling semiconductor laser light source, the laser wavelength of the blue light fiber coupling light source is 445nm, the single output power is 1.4W, the three output powers are 4.2W, and the blue light fiber coupling light source is connected with a special optical fiber 5 through three optical fibers 4.
The green light fiber coupling light source 2 is a light source of two fiber coupling semiconductor lasers, the laser wavelength of the light source is 520nm, the single output power is 1W, the two output powers are 2W, and the light source is connected with a special optical fiber 5 through 2 optical fibers 4.
The red light fiber coupling light source 3 is a fiber coupling semiconductor laser light source, the laser wavelength is 630nm, the single output power is 1W, and the red light fiber coupling light source is connected with the special optical fiber 5 through an optical fiber 4.
The optical fiber 4 is a multimode optical fiber, the core diameter of which is 105 μm, the numerical aperture of which is 0.22, and is connected with the special optical fiber 5 by welding.
The special optical fiber 5 is a large-core-diameter special optical fiber capable of bearing high-power laser, the core diameter of the special optical fiber is 400 microns, the numerical aperture of the special optical fiber is 0.3, and the transmittable wavelength of the special optical fiber is 400 nm-2000 nm.
The ball lens (6) is made of fused quartz material, the diameter is 3mm, and the focal length is 2.42 mm.
After the laser passes through the optical system of the embodiment, a circular light spot with the diameter of 0.3-0.4 m and the uniformity of more than or equal to 90% is formed at the position of 1 m.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An optical system for physical evidence searching, characterized by: the optical fiber coupling light source comprises a blue light optical fiber coupling light source (1), a green light optical fiber coupling light source (2), a red light optical fiber coupling light source (3), an optical fiber (4), a special optical fiber (5) and a ball lens (6), wherein the blue light optical fiber coupling light source (1), the green light optical fiber coupling light source (2) and the red light optical fiber coupling light source (3) are respectively connected with the special optical fiber (5) through the optical fiber (4), and a light outlet of the special optical fiber (5) is positioned on a focus of the ball lens (6).
2. The optical system for physical evidence searching of claim 1, wherein: the blue light fiber coupling light source (1) can be a single fiber coupling semiconductor laser light source, or a fiber laser light source formed by re-combining a plurality of fiber coupling semiconductor laser light sources, the laser wavelength is 440-450 nm, and the output power is 0.5-15W.
3. The optical system for physical evidence searching of claim 1, wherein: the green light fiber coupling light source (2) can be a single fiber coupling semiconductor laser light source, or a fiber laser light source formed by combining a plurality of fiber coupling semiconductor laser light sources, the laser wavelength is 515-533 nm, and the output power is 0.2-10W.
4. The optical system for physical evidence searching of claim 1, wherein: the red light fiber coupling light source (3) can be a single fiber coupling semiconductor laser light source or a fiber laser light source formed by re-combining a plurality of fiber coupling semiconductor laser light sources, the laser wavelength is 630-655 nm, and the output power is 0.2-5W.
5. The optical system for physical evidence searching of claim 1, wherein: the core diameter of the optical fiber (4) can be a single-mode optical fiber or a multi-mode optical fiber, and the numerical aperture of the optical fiber is 0.1-0.3.
6. The optical system for physical evidence searching of claim 1, wherein: the special optical fiber (5) is a large-core-diameter special optical fiber capable of bearing high-power laser, the core diameter of the special optical fiber is 200-600 mu m, the numerical aperture of the special optical fiber is 0.2-0.5, and the transmittable wavelength of the special optical fiber is 400-2000 nm.
7. The optical system for physical evidence searching of claim 1, wherein: the ball lens (6) is made of glass materials such as K9 and the like, the diameter is 2 mm-5 mm, and the focal length is 1.0 mm-4.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921076177.4U CN210181308U (en) | 2019-07-10 | 2019-07-10 | Optical system for material evidence search |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921076177.4U CN210181308U (en) | 2019-07-10 | 2019-07-10 | Optical system for material evidence search |
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| CN210181308U true CN210181308U (en) | 2020-03-24 |
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| CN201921076177.4U Active CN210181308U (en) | 2019-07-10 | 2019-07-10 | Optical system for material evidence search |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115201968A (en) * | 2022-06-14 | 2022-10-18 | 核工业理化工程研究院 | Optical fiber coupler and application thereof |
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2019
- 2019-07-10 CN CN201921076177.4U patent/CN210181308U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115201968A (en) * | 2022-06-14 | 2022-10-18 | 核工业理化工程研究院 | Optical fiber coupler and application thereof |
| CN115201968B (en) * | 2022-06-14 | 2024-04-19 | 核工业理化工程研究院 | Optical fiber coupler and application thereof |
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