Integrated transceiver remote laser transmission optical system with direct detectivity of transmittance

Abstract

The present application relates to the field of laser transmission, in particular to a kind of integrated transceiving long-distance laser transmission optical system with direct detection transmittance.It includes transmission laser emission light path and beacon light receiving light path, the transmission laser emission light path and the beacon light receiving light path are vertically and arranged as "L" type;The transmission laser emission light path includes movable optical fiber output end, first lens, second lens and third transmissive-reflector arranged in sequence, the movable optical fiber output end can be moved away from the direction of the first lens;The beacon light receiving light path includes fourth filter, fifth diaphragm, sixth lens, seventh lens, eighth lens, ninth lens and tenth lens arranged in sequence;In beacon light receiving light path, the third transmissive-reflector is used as reflector to reflect beacon light with the side away from movable optical fiber output end.The present application has the characteristics of low cost, low weight, small size and high power emission, and is suitable for practical popularization and application.

Description

Technical Field

[0001] This invention relates to the field of laser transmission, and more specifically to an integrated long-distance laser transmission optical system with directly detectable transmittance. Background Technology

[0002] Laser transmission is an important direction for current laser applications and one of the core trends for future development. Laser transmission relies on an optical system to collimate and expand the laser beam to achieve long-distance laser transmission, and usually adopts an integrated receiving (beacon light) and transmitting (transmitting laser) method to simultaneously locate the long-distance laser transmission target.

[0003] During long-distance laser transmission, the diversity and complexity of the working environment can easily lead to optical system transmittance issues caused by optical path contamination or abnormalities in optical or structural components. Reduced transmittance, i.e., reduced light utilization by the system, directly results in a decline in system performance.

[0004] In large-aperture long-distance laser transmission systems, transmittance monitoring cannot be directly achieved due to the limitations of the transmittance detection equipment's aperture. Furthermore, current designs for long-distance laser transmission optical systems do not consider the ease of transmittance detection, making performance degradation difficult to detect. Therefore, there is an urgent market need for a long-distance laser transmission optical system capable of direct transmittance detection, to effectively improve the convenience and effectiveness of transmittance monitoring in long-distance laser transmission optical systems. Summary of the Invention

[0005] This invention provides an integrated long-distance laser transmission optical system that can directly detect transmittance, aiming to solve the problem that the transmittance of current long-distance laser transmission optical systems cannot be directly detected.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] This invention provides an integrated long-distance laser transmission optical system with directly detectable transmittance, including a transmission laser emitting optical path and a beacon light receiving optical path, wherein the transmission laser emitting optical path and the beacon light receiving optical path are perpendicular and arranged in an "L" shape.

[0008] The laser transmission optical path includes a movable fiber optic output end, a first lens, a second lens, and a third reflective mirror arranged in sequence. The movable fiber optic output end can move away from the first lens.

[0009] The beacon light receiving optical path includes a fourth filter, a fifth aperture, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged in sequence; in the beacon light receiving optical path, the third reflector mirror on the side facing away from the movable fiber output end serves as a reflector to reflect the beacon light;

[0010] The first lens has a concave surface on the side facing the fiber output end and a convex surface on the side facing away from the fiber output end, and the focal length of the first lens is positive.

[0011] The second lens has a convex surface on the side facing the fiber optic output end and a convex surface on the side facing away from the fiber optic output end. The focal length of the second lens is positive.

[0012] The third reflector is a flat plate lens. The side of the third reflector facing the fiber optic output end is flat, and the side facing away from the fiber optic output end is also flat.

[0013] Filter;

[0014] Aperture;

[0015] The sixth lens has a convex surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the sixth lens is positive.

[0016] The seventh lens has a concave surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the seventh lens is negative.

[0017] The eighth lens has a convex surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the eighth lens is positive.

[0018] The ninth lens has a convex surface on the side facing the aperture stop and a concave surface on the side away from the aperture stop, and the focal length of the ninth lens is positive.

[0019] The tenth lens has a concave surface on the side facing the aperture stop and a concave surface on the side away from the aperture stop, and the focal length of the tenth lens is negative.

[0020] Furthermore, the movable fiber optic output end of the transmission laser emission optical path outputs a laser wavelength of 808±10nm, and the beacon light received by the beacon light receiving optical path has a beacon light wavelength of 670±20nm.

[0021] Furthermore, the movable fiber optic output end can be moved from the remote laser emission position P0 to the optical system transmittance detection emission position P1 in a direction away from the first lens, where 10mm < |P0-P1| < 25mm;

[0022] When the transmittance detection emission position of the movable optical fiber output end is 10mm < |P0-P1| < 25mm, the distance between the transmittance detection position P and the optical system output end position P2 is 500mm < |P-P2| < 1500mm.

[0023] Furthermore, the integrated transceiver long-distance laser transmission optical system with directly detectable transmittance satisfies the following relationship:

[0024] N1 = N2 ≥ 1.5;

[0025] N6≥1.65;

[0026] |N6-N7|≤0.2;

[0027] |N7-N8|≤0.1;

[0028] |N8-N9|≤0.1;

[0029] |N9-N10|≤0.1;

[0030] Wherein, N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, N6 is the refractive index of the sixth lens, N7 is the refractive index of the seventh lens, N8 is the refractive index of the eighth lens, N9 is the refractive index of the ninth lens, and N10 is the refractive index of the tenth lens.

[0031] Furthermore, the first lens, second lens, sixth lens, seventh lens, eighth lens, ninth lens, and tenth lens are all spherical lenses;

[0032] Furthermore, all of the spherical lenses are glass spherical lenses;

[0033] Furthermore, the integrated transceiver long-distance laser transmission optical system with directly detectable transmittance satisfies the following relationship:

[0034] The distance between the movable fiber optic output end and the first lens is adjustable from 110mm to 125mm. The air gap between the first and second lenses is 4mm to 6mm. The air gap between the second lens and the third mirror is 50mm to 60mm. The air gap between the third mirror and the filter is 40mm to 45mm. The air gap between the filter and the aperture is 2.5mm to 3mm. The air gap between the aperture and the sixth lens is 0mm to 0.5mm. The air gap between the sixth and seventh lenses is 4.5mm to 5.5mm. The air gap between the seventh and eighth lenses is 8.5mm to 9.5mm. The air gap between the eighth and ninth lenses is 1mm to 1.5mm. The air gap between the ninth and tenth lenses is 3mm to 4mm. The gap between the tenth lens and the detector chip is 5mm to 6mm.

[0035] The beneficial effects achieved by this invention are as follows:

[0036] 1) The present invention provides an integrated long-distance laser transmission optical system that can directly detect transmittance. Through actual production product testing, the diameter of the diffuse spot can be as low as less than 6mm in the transmittance detection state, which meets the requirement of diffuse spot size for direct transmittance detection. In the long-distance laser emission state, it meets the function of beam collimation and beam expansion. The optical system as a whole meets the functions of beacon light reception and long-distance laser transmission.

[0037] 2) The present invention provides an integrated long-distance laser transmission optical system with direct transmittance detection. By reasonably controlling the optical path structure, lens thickness and distance of the transmission laser emission optical path and the beacon light receiving optical path, the optical system achieves low weight, small size and low cost, and realizes the visual positioning of the laser transmission target by the optical system.

[0038] 3) The present invention provides an integrated long-distance laser transmission optical system with direct transmittance detection, which features low cost, low weight, small size and high power transmission, and is suitable for practical application. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the present invention;

[0041] Figure 2 This is a diagram of the center field light spot array at a distance of |P-P2|=850mm when the movable fiber optic output end of the present invention is located at a distant laser emission position;

[0042] Figure 3 This is a diagram of the center field light spot array at a distance of |P-P2|=850mm when the movable optical fiber output end of the present invention is located at the transmittance detection position;

[0043] Figure 4 This is a diagram showing the light spot pattern of the beacon light receiving optical path of the present invention.

[0044] Figure 5 This is a table of specific parameters for each lens in this invention.

[0045] In the diagram, P0 is the movable fiber optic output position that can be used to emit laser light from a distance; P1 is the transmittance detection position; P2 is the laser emission position of the optical system; P is the transmittance detection position; 1 is the first lens; 2 is the second lens; 3 is the third mirror; 4 is the fourth filter; 5 is the fifth aperture; 6 is the sixth lens; 7 is the seventh lens; 8 is the eighth lens; 9 is the ninth lens; and 10 is the tenth lens.

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0049] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0050] like Figures 1-4 As shown, the present invention provides an integrated long-distance laser transmission optical system with directly detectable transmittance, including a transmission laser emitting optical path and a beacon light receiving optical path, wherein the transmission laser emitting optical path and the beacon light receiving optical path are perpendicular and arranged in an "L" shape.

[0051] The laser transmission optical path includes a movable fiber optic output end, a first lens, a second lens, and a third reflective mirror arranged sequentially. The movable fiber optic output end can move away from the first lens. The first and second lenses are vertically arranged, and the third reflective mirror is tilted. Figure 1 As shown;

[0052] The beacon light receiving optical path includes a fourth filter, a fifth aperture, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged sequentially. In the beacon light receiving optical path, the third reflector, facing away from the movable fiber optic output end, acts as a reflector to reflect the beacon light. The fourth filter, fifth aperture, sixth lens, seventh lens, eighth lens, ninth lens, and tenth lens are horizontally arranged, as shown below. Figure 1 As shown;

[0053] The first lens has a concave surface on the side facing the fiber output end and a convex surface on the side facing away from the fiber output end, and the focal length of the first lens is positive.

[0054] The second lens has a convex surface on the side facing the fiber optic output end and a convex surface on the side facing away from the fiber optic output end. The focal length of the second lens is positive.

[0055] The third reflector is a flat plate lens. The side of the third reflector facing the fiber optic output end is flat, and the side facing away from the fiber optic output end is also flat.

[0056] Filters are used to improve the reception and display of beacon light.

[0057] Aperture;

[0058] The sixth lens has a convex surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the sixth lens is positive.

[0059] The seventh lens has a concave surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the seventh lens is negative.

[0060] The eighth lens has a convex surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the eighth lens is positive.

[0061] The ninth lens has a convex surface on the side facing the aperture stop and a concave surface on the side away from the aperture stop, and the focal length of the ninth lens is positive.

[0062] The tenth lens has a concave surface on the side facing the aperture stop and a concave surface on the side away from the aperture stop, and the focal length of the tenth lens is negative.

[0063] The movable fiber optic output end of the transmission laser emission optical path outputs a laser wavelength of 808±10nm, and the beacon light received by the beacon light receiving optical path has a beacon light wavelength of 670±20nm.

[0064] In this invention, each spherical lens adopts a concave and convex structure and a combination of positive and negative focal lengths. By rationally allocating the optical power of the transmission laser emission optical path and the beacon light receiving optical path, the optical system can rationally realize the function of directly detecting transmittance and the function of beacon light receiving and transmission laser emission.

[0065] like Figure 1 As shown, in this embodiment, the movable fiber optic output end can be moved from the remote laser emission position P0 to the optical system transmittance detection position P1 in a direction away from the first lens, where 10mm < |P0-P1| < 25mm;

[0066] When the transmittance detection position of the movable optical fiber output end is 10mm < |P0-P1| < 25mm, the distance between the transmittance detection position P and the output position P2 of the optical system is 500mm < |P-P2| < 1500mm.

[0067] In this embodiment, the movable fiber optic output end that meets the above range moves to realize the conversion between long-distance laser emission and directly detectable transmittance of the optical system.

[0068] like Figure 1 As shown, in this embodiment, the integrated transceiver long-distance laser transmission optical system with directly detectable transmittance satisfies the following relationship:

[0069] N1 = N2 ≥ 1.5;

[0070] N6≥1.65;

[0071] |N6-N7|≤0.2;

[0072] |N7-N8|≤0.1;

[0073] |N8-N9|≤0.1;

[0074] |N9-N10|≤0.1;

[0075] Wherein, N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, N6 is the refractive index of the sixth lens, N7 is the refractive index of the seventh lens, N8 is the refractive index of the eighth lens, N9 is the refractive index of the ninth lens, and N10 is the refractive index of the tenth lens.

[0076] In this embodiment, the lens combination structure that satisfies the refractive index relationship of each lens can more easily achieve laser beam collimation and expansion and achieve reasonable distribution of optical power, better correct spherical aberration, coma and other aberrations, and improve the beam collimation effect, transmittance detection effect and beacon light diffusion effect of the optical system.

[0077] like Figure 1 As shown, in this embodiment, the first lens, second lens, sixth lens, seventh lens, eighth lens, ninth lens, and tenth lens are all spherical lenses.

[0078] In this embodiment, by optimizing the lens curvature, the path of off-axis light rays is reasonably controlled, thereby reducing the loss of edge light rays.

[0079] like Figure 1 As shown, in this embodiment, all spherical lenses are glass spherical lenses.

[0080] In this embodiment, all spherical lenses are made of glass to achieve higher transmittance and greater stability of the optical system.

[0081] like Figure 1 As shown, in this embodiment, the integrated transceiver long-distance laser transmission optical system with directly detectable transmittance satisfies the following relationship:

[0082] The distance between the movable fiber optic output end and the first lens is adjustable from 110mm to 125mm. The air gap between the first and second lenses is 4mm to 6mm. The air gap between the second lens and the third mirror is 50mm to 60mm. The air gap between the third mirror and the filter is 40mm to 45mm. The air gap between the filter and the aperture is 2.5mm to 3mm. The air gap between the aperture and the sixth lens is 0mm to 0.5mm. The air gap between the sixth and seventh lenses is 4.5mm to 5.5mm. The air gap between the seventh and eighth lenses is 8.5mm to 9.5mm. The air gap between the eighth and ninth lenses is 1mm to 1.5mm. The air gap between the ninth and tenth lenses is 3mm to 4mm. The gap between the tenth lens and the detector chip is 5mm to 6mm.

[0083] In this embodiment, the lens combination structure that satisfies the above relationship can reduce the overall weight and lower the cost while optimizing and ensuring the performance of the optical system.

[0084] In this embodiment, the focal length of the laser transmitting optical path is 112mm, and the focal length of the beacon light receiving optical path is 26.5mm. Figure 1As shown, the specific parameters of each lens are as follows: Figure 5 As shown.

[0085] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An integrated long-distance laser transmission optical system with directly detectable transmittance, characterized in that: It includes a transmission laser emitting optical path and a beacon light receiving optical path, wherein the transmission laser emitting optical path and the beacon light receiving optical path are perpendicular and arranged in an "L" shape; The laser transmission optical path includes a movable fiber optic output end, a first lens, a second lens, and a third reflective mirror arranged in sequence. The movable fiber optic output end can move away from the first lens. The beacon light receiving optical path includes a fourth filter, a fifth aperture, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged sequentially. In the beacon light receiving optical path, the third transflector mirror on the side facing away from the movable fiber output end serves as a reflector to reflect the beacon light; The first lens has a concave surface on the side facing the fiber output end and a convex surface on the side facing away from the fiber output end, and the focal length of the first lens is positive. The second lens has a convex surface on the side facing the fiber output end and a convex surface on the side facing away from the fiber output end, and the focal length of the second lens is positive. The third reflective mirror is a flat lens; The sixth lens has a convex surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the sixth lens is positive; The seventh lens has a concave surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the seventh lens is negative; The eighth lens has a convex surface on the side facing the aperture stop and a convex surface on the side away from the aperture stop, and the focal length of the eighth lens is positive; The ninth lens has a convex surface on the side facing the aperture stop and a concave surface on the side away from the aperture stop, and the focal length of the ninth lens is positive. The tenth lens has a concave surface on the side facing the aperture stop and a concave surface on the side away from the aperture stop, and the focal length of the tenth lens is negative.

2. The integrated long-distance laser transmission optical system with directly detectable transmittance according to claim 1, characterized in that: The movable fiber optic output end of the transmission laser emitting optical path outputs a laser wavelength of 808±10nm, and the beacon light received by the beacon light receiving optical path has a beacon light wavelength of 670±20nm.

3. The integrated long-distance laser transmission optical system with directly detectable transmittance according to claim 1, characterized in that: The movable fiber optic output end can be moved from the remote laser emission position P0 to the optical system transmittance detection emission position P1 in a direction away from the first lens, 10mm < |P0-P1| < 25mm; When the transmittance detection emission position is 10mm < |P0-P1| < 25mm, the distance between the transmittance detection position P and the optical system emission position P2 is 500mm < |P-P2| < 1500mm.

4. The integrated long-distance laser transmission optical system with directly detectable transmittance according to claim 1, characterized in that, The integrated transceiver long-distance laser transmission optical system with directly detectable transmittance satisfies the following relationship: N1 = N2 ≥ 1.5; N6≥1.65； |N6-N7|≤0.2; |N7-N8|≤0.1; |N8-N9|≤0.1; |N9-N10|≤0.1; Wherein, N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, N6 is the refractive index of the sixth lens, N7 is the refractive index of the seventh lens, N8 is the refractive index of the eighth lens, N9 is the refractive index of the ninth lens, and N10 is the refractive index of the tenth lens.

5. The integrated long-distance laser transmission optical system with directly detectable transmittance according to claim 1, characterized in that: The first lens, second lens, sixth lens, seventh lens, eighth lens, ninth lens, and tenth lens are all spherical lenses.

6. The integrated long-distance laser transmission optical system with directly detectable transmittance according to claim 5, characterized in that: All of the spherical lenses mentioned are glass spherical lenses.

7. The integrated long-distance laser transmission optical system with directly detectable transmittance according to claim 1, characterized in that, The integrated transceiver long-distance laser transmission optical system with directly detectable transmittance satisfies the following relationship: The distance between the movable fiber optic output end and the first lens is adjustable from 110mm to 125mm. The air gap between the first and second lenses is 4mm to 6mm. The air gap between the second lens and the third mirror is 50mm to 60mm. The air gap between the third mirror and the filter is 40mm to 45mm. The air gap between the filter and the aperture is 2.5mm to 3mm. The air gap between the aperture and the sixth lens is 0mm to 0.5mm. The air gap between the sixth and seventh lenses is 4.5mm to 5.5mm. The air gap between the seventh and eighth lenses is 8.5mm to 9.5mm. The air gap between the eighth and ninth lenses is 1mm to 1.5mm. The air gap between the ninth and tenth lenses is 3mm to 4mm. The gap between the tenth lens and the detector chip is 5mm to 6mm.

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