A co-boresight eye-safe ranging laser illuminator

Abstract

This utility model relates to the field of lasers and discloses a common-aperture laser illuminator for eye-safe ranging. It includes: a first laser emitter for emitting a laser in an eye-safe wavelength band; a second laser emitter for emitting a 1064nm wavelength laser, wherein only one of the two laser emitters is operational at any given time; and a laser receiver for receiving the two wavelength lasers, comprising a beam splitter that divides the received laser into two paths. One path has a first narrowband filter with a center wavelength in the eye-safe wavelength band and a first detector for receiving the eye-safe wavelength laser arranged sequentially along its propagation direction. The other path has a second narrowband filter with a center wavelength of 1064nm and a second detector for receiving the 1064nm wavelength laser arranged sequentially along its propagation direction. This laser illuminator achieves accurate short-range ranging and pre-irradiation auxiliary ranging using an eye-safe laser, and has low system power consumption.

Description

Technical Field

[0001] This utility model relates to the field of lasers, specifically to a common-aperture laser irradiator for safe human eye ranging. Background Technology

[0002] Laser illuminators, as key components in laser semi-active guidance and laser ranging systems, are widely used in security and industrial measurement fields. Currently, traditional laser illuminators on the market generally use 1064nm lasers as their operating wavelength. This wavelength has advantages such as high energy and long transmission distance, but it also has significant technical drawbacks.

[0003] Traditional 1064nm laser irradiators have the following main problems: First, the 1064nm band is not a safe band for the human eye. If the laser is used directly for ranging before irradiation, the target distance may be too close, causing permanent damage to the human eye.

[0004] Secondly, due to the high energy of 1064nm lasers, their minimum ranging range is typically limited to over 100m, making accurate ranging of close-range targets impossible. This limitation prevents traditional laser illuminators from being used in scenarios requiring close-range target identification and precision guidance. Furthermore, high-energy lasers are prone to damaging laser detectors when operating at close range, affecting equipment lifespan and system reliability.

[0005] Finally, traditional laser illuminators require a high-energy laser to be continuously powered on during ranging, resulting in high system power consumption. This high power consumption not only increases the system's energy consumption but also makes it difficult to further reduce the size and weight of the system's power supply structure, hindering system integration and portability. Utility Model Content

[0006] This application provides a common-aperture laser illuminator for eye-safe ranging, which achieves accurate short-range ranging and pre-irradiation auxiliary ranging using eye-safe laser, and the system has low power consumption.

[0007] This application provides a common-aperture laser illuminator for eye-safe ranging, comprising: A first laser emitter for emitting a laser in a wavelength safe for the human eye; A second laser emitter is used to emit 1064nm band lasers, and only one of the two laser emitters is in operation at any given time; A laser receiver that receives lasers in two wavelength bands includes a beam splitter that divides the received laser into two paths. One path has a first narrowband filter with a center wavelength in the human eye-safe band and a first detector for receiving lasers in the human eye-safe band set sequentially in the direction of laser propagation. The other path has a second narrowband filter with a center wavelength of 1064nm set sequentially in the direction of laser propagation and a second detector for receiving lasers in the 1064nm band.

[0008] Based on the above technical solution, the first laser emitter and the first detector cooperate to measure the distance to targets within the common ranging range of the human eye-safe wavelength laser and the 1064nm wavelength laser; the second laser emitter and the second detector cooperate to perform ultra-long-distance ranging when the target distance exceeds the maximum range of the human eye-safe wavelength laser; the second laser emitter is also used to irradiate when the target distance obtained by auxiliary ranging before human eye-safe wavelength laser irradiation is within the safe irradiation range of the second laser emitter.

[0009] Based on the above technical solution, the laser irradiator further includes a control drive circuit; the first laser emitter and the second laser emitter are both connected to the control drive circuit, the first detector is connected to the control drive circuit through a first receiving circuit, and the second detector is connected to the control drive circuit through a second receiving circuit.

[0010] Based on the above technical solution, the laser irradiator further includes a base structure and an adjustment structure; the base structure accommodates and mounts a first laser emitter, a second laser emitter, a laser receiver, a control drive circuit, a second receiving circuit, and a first receiving circuit; the adjustment structure is used to adjust the optical axes of the first laser emitter, the second laser emitter, and the laser receiver to be aligned.

[0011] Based on the above technical solution, the first narrowband filter has a first set half-width, the second narrowband filter has a second set half-width, and the first set half-width is greater than the second set half-width.

[0012] Based on the above technical solution, the first detector adopts an InGaAs-APD detector with a response band of 900~1700nm; the second detector adopts a Si-APD detector with a response band of 400~1100nm.

[0013] Based on the above technical solution, the first laser emitter includes an erbium glass laser emitter and a first beam expander, and the second laser emitter uses an Nd:YAG laser emitter and a second beam expander.

[0014] Based on the above technical solution, the first beam expander includes a 1064nm band laser emitting objective and a 1064nm band laser emitting eyepiece, and the 1064nm band laser emitting eyepiece and the 1064nm band laser emitting objective are arranged sequentially in the laser propagation direction of the Nd:YAG laser emitter; the second beam expander includes an eye-safe band laser emitting objective and an eye-safe band laser emitting eyepiece, and the eye-safe band laser emitting eyepiece and the eye-safe band laser emitting objective are arranged sequentially in the laser propagation direction of the erbium glass laser emitter.

[0015] Based on the above technical solution, a human eye-safe band laser receiving focusing lens is further provided between the first narrowband filter and the first detector, and a 1064nm band laser receiving focusing lens is further provided between the second narrowband filter and the second detector; the beam splitter is provided with a receiving eyepiece and a receiving objective lens in the opposite direction to the laser propagation direction; the receiving objective lens is coated with anti-reflection modes for both the human eye-safe band and the 1064nm band.

[0016] Based on the above technical solution, the human eye-safe wavelength laser is a 1535nm wavelength laser, a 1550nm wavelength laser, or a 1570nm wavelength laser.

[0017] The beneficial effects of the technical solutions provided in this application include at least the following: The laser irradiator of this application includes a first laser emitter that emits laser light in the eye-safe band, a second laser emitter that emits laser light in the 1064nm band, and a laser receiver that simultaneously receives laser light in both bands. The eye-safe laser light and the 1064nm laser light share a single laser receiver, which can reduce the overall size of the device. For short-range ranging, especially for targets with a minimum range of less than 1064nm wavelength laser, the eye-safe wavelength laser of the first laser emitter can be used to achieve accurate short-range ranging. For targets within the range of both the eye-safe wavelength laser and the 1064nm wavelength laser, the eye-safe wavelength laser of the first laser emitter is also used for ranging. The eye-safe wavelength laser has lower energy than the 1064nm wavelength laser, which can reduce system power consumption. Before laser irradiation, ranging is still required. The eye-safe wavelength laser of the first laser emitter is used for auxiliary ranging before irradiation to protect against irradiation, instead of using the second laser emitter for ranging. This further reduces system power consumption and avoids accidental injury to personnel or damage to the APD detector. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A block diagram of the laser irradiator provided in this application; Figure 2 A schematic diagram illustrating the composition of the first laser emitter, the second laser emitter, and the laser receiver of the laser irradiator provided in this application; In the figure: 1. 1064nm band laser emitting objective; 2. 1064nm band laser emitting eyepiece; 3. Eye-safe band laser emitting objective; 4. Eye-safe band laser emitting eyepiece; 5. First detector; 6. Eye-safe band laser receiving focusing lens; 7. First narrowband filter; 8. Receiving objective; 9. Receiving eyepiece; 10. Beam splitter; 11. Second narrowband filter; 12. 1064nm band laser receiving focusing lens; 13. Second detector; 101. First laser emitter; 102. Second laser emitter; 103. Laser receiver; 104. Control drive circuit; 105. Second receiving circuit; 106. First receiving circuit. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0021] It is worth noting that the laser irradiation mentioned in this application is for laser semi-braking guidance, and in this industry field, only high-energy 1064nm wavelength lasers can be used for irradiation.

[0022] This application discloses a common-aperture laser illuminator for eye-safe ranging, which achieves accurate short-range ranging and pre-irradiation auxiliary ranging using eye-safe laser, enabling ultra-long-range laser ranging with low system power consumption.

[0023] like Figure 1 and Figure 2As shown, this application discloses a common-aperture laser illuminator for eye-safe ranging. The laser illuminator includes a laser receiver 103, a first laser emitter 101 for emitting laser light in the eye-safe band, and a second laser emitter 102 for emitting laser light in the 1064nm band.

[0024] The first laser emitter 101 uses an eye-safe wavelength laser for conventional eye-safe ranging. The second laser emitter 102 uses a 1064nm wavelength laser for ultra-long-range ranging or illumination. Only one of the two laser emitters is operational at any given time.

[0025] The laser receiver 103 receives lasers in two wavelength bands simultaneously. The laser receiver 103 includes a beam splitter 10, which splits the received laser into two paths. One path of the laser propagation direction is sequentially equipped with a first narrowband filter 7 with a center wavelength in the human eye-safe band and a first detector 5 for receiving lasers in the human eye-safe band. The other path of the laser propagation direction is sequentially equipped with a second narrowband filter 11 with a center wavelength of 1064nm and a second detector 13 for receiving lasers in the 1064nm band.

[0026] The laser irradiator of this application includes a first laser emitter 101 emitting a laser in the eye-safe band, a second laser emitter 102 emitting a laser in the 1064nm band, and a laser receiver 103 that simultaneously receives lasers in both bands. The eye-safe laser and the 1064nm laser share a single laser receiver, reducing the overall size of the device. For short-range ranging, especially for targets with a range less than the minimum range of the 1064nm laser, the eye-safe laser of the first laser emitter 101 can be used to achieve eye-safe, close-range, accurate ranging. For targets located in the eye-safe band... For targets within the range of both the full-band laser and the 1064nm laser, the eye-safe band laser of the first laser emitter 101 is used for ranging. The eye-safe band laser has lower energy than the 1064nm band laser, which reduces system power consumption. Before laser irradiation, ranging is still required. The eye-safe band laser of the first laser emitter 101 is used for auxiliary ranging before irradiation to ensure eye safety, instead of using the second laser emitter 102 for ranging. This further reduces system power consumption and avoids accidental injury to personnel or damage to the detector.

[0027] In addition, the laser irradiator of this application also includes a 1064nm band laser with its own irradiation function and an ultra-long-distance laser ranging function.

[0028] Specifically, the beam splitter 10, the first narrowband filter 7, and the second narrowband filter 11 belong to... Figure 1 Part of the receiving optical assembly shown.

[0029] Furthermore, in one embodiment, the first laser emitter 101 and the first detector 5 cooperate and use a human eye-safe wavelength laser to measure the distance to targets located within the common ranging range of the human eye-safe wavelength laser and the 1064nm wavelength laser.

[0030] When the target distance exceeds the maximum range of laser in the safe band for human eyes, the second laser emitter 102 and the second detector 13 are used in conjunction to perform ultra-long-distance ranging.

[0031] When the laser illuminator is in operation, it always prefers to use the laser in the human eye safe band. When ranging targets that are within the range of both the human eye safe band laser and the 1064nm band laser, the human eye safe band laser is used for ranging.

[0032] Before irradiation, the first laser emitter 101 uses an eye-safe laser for pre-irradiation auxiliary ranging. If the target distance obtained by the pre-irradiation auxiliary ranging is within the safe irradiation range of the 1064nm band laser, the second laser emitter 102 will irradiate. If the pre-irradiation auxiliary ranging is not within the safe irradiation range of the 1064nm band laser, irradiation cannot be performed.

[0033] Preferably, the first laser emitter 101 generally operates at a fundamental frequency of 20Hz and a period of 50ms. The time required to complete one eye-safe distance measurement does not exceed 5ms, which does not affect the laser irradiation operation.

[0034] Specifically, as further explained below, the laser irradiator includes multiple travel values, from smallest to largest: minimum range for eye-safe wavelength, minimum range for 1064nm wavelength, minimum travel for 1064nm wavelength irradiation, maximum travel for 1064nm wavelength irradiation, maximum range for eye-safe wavelength, and maximum range for 1064nm wavelength; the minimum range for 1064nm wavelength is greater than 100m. The ranging range of the eye-safe wavelength laser of the first laser emitter 101 completely encompasses the irradiation range of the 1064nm wavelength.

[0035] When the target is located between the minimum range of the eye-safe band and the minimum range of the 1064nm band illumination, the eye-safe laser of the first laser emitter 101 is used for ranging; at this time, the first laser emitter 101 is working and the second laser emitter 102 is not working.

[0036] When the target is located between the minimum travel distance of the 1064nm band illumination and the maximum range of the human eye-safe band, the human eye-safe laser of the first laser emitter 101 is also used for ranging; at this time, the first laser emitter 101 is working and the second laser emitter 102 is not working.

[0037] Specifically, it is located precisely at the dividing point of the maximum range of the human eye-safe wavelength band, and still uses the human eye-safe laser of the first laser emitter 101.

[0038] When the target is located between the maximum range of the human eye-safe wavelength band and the maximum range of the 1064nm wavelength band, the second laser emitter 102, in conjunction with the second detector 13, uses a 1064nm wavelength laser for ultra-long-distance ranging. At this time, the first laser emitter 101 is not working, while the second laser emitter 102 is working.

[0039] Before irradiation, the first laser emitter 101, in conjunction with the first detector 5, uses a laser in the human eye-safe wavelength band to measure the target distance. At this time, the first laser emitter 101 is working, while the second laser emitter 102 is not working.

[0040] When the target distance measured before irradiation is between the minimum and maximum irradiation distances in the 1064nm band, the second laser emitter 102 irradiates the target. At this time, the first laser emitter 101 is not working, and the second laser emitter 102 is working.

[0041] If the target distance measured before irradiation is less than the minimum irradiation range for the 1064nm wavelength band, it is unsafe and could result in injury to personnel or damage to the APD detector. If the target distance measured before irradiation is greater than the maximum irradiation range for the 1064nm wavelength band, it is outside the irradiation range and irradiation is not possible. In this case, neither laser emitter will operate.

[0042] For example, in one instance, the multiple travel values, from smallest to largest, are as follows: The minimum range for the human eye-safe band is 15m, the minimum range for the 1064nm band is 150m, the minimum travel distance for irradiation in the 1064nm band is 200m, the maximum travel distance for irradiation in the 1064nm band is 9km, the maximum range for the human eye-safe band is 10km, and the maximum range for the 1064nm band is 20km.

[0043] When the target distance is 130m, 5km, 9km or 10km, the eye-safe laser of the first laser emitter 101 is used for ranging; at this time, the first laser emitter 101 is working and the second laser emitter 102 is not working.

[0044] When the target distance is 11km, 15km, or 20km, the 1064nm wavelength laser from the second laser emitter 102 is used for ultra-long-range ranging. At this time, the first laser emitter 101 is not working, and the second laser emitter 102 is working.

[0045] When the target distance measured before irradiation is 100m or 150m, it is unsafe and may cause accidental injury to personnel or damage to the APD detector. When the target distance measured before irradiation is 210m, 1km, 5km, or 9km, the second laser emitter 102 irradiates the target; at this time, the first laser emitter 101 is not working, and the second laser emitter 102 is working. When the target distance measured before irradiation is 9.5km, it is outside the irradiation range and cannot be irradiated.

[0046] The laser irradiator of this application uses the eye-safe laser of the first laser emitter 101 to measure the distance for targets located within the common ranging range of the human eye-safe band laser and the 1064nm band laser. The human eye-safe band laser has lower energy than the 1064nm band laser, which can reduce system power consumption and make the system power consumption small. Before the second laser emitter 102 irradiates, the eye-safe laser of the first laser emitter 101 is used for pre-irradiation auxiliary ranging instead of the second laser emitter 102. The target distance information can be confirmed by the eye-safe laser, which can prevent accidental injury to personnel or damage to the APD detector when the target is too close. At the same time, it can also reduce the power consumption of the system. Meanwhile, when the target distance exceeds the maximum range of the first laser emitter 101, the second laser emitter 102 can perform ultra-long-distance ranging. At this time, ultra-long-distance ranging will not cause accidental damage. The laser illuminator can perform both close-range accurate ranging and ultra-long-distance ranging at the same time, with complete functions.

[0047] Furthermore, in one embodiment, the laser irradiator also includes a control drive circuit 104 having a communication interface, the control drive circuit 104 being used to drive two laser emitters and also to process laser received signals.

[0048] The first laser emitter 101 and the second laser emitter 102 are both connected to the control drive circuit 104. The first detector 5 is connected to the control drive circuit 104 via the first receiving circuit 106, and the second detector 13 is connected to the control drive circuit 104 via the second receiving circuit 105.

[0049] In actual operation, the control drive circuit 104 controls the switching of the working state of the first laser emitter 101 and the second laser emitter 102. At the same time, only one of the first laser emitter 101 and the second laser emitter 102 is in the working state.

[0050] Furthermore, in one embodiment, the laser irradiator also includes a substrate structure and an adjustment structure.

[0051] The base structure houses and mounts a first laser emitter 101, a second laser emitter 102, a laser receiver 103, a control drive circuit 104, a second receiving circuit 105, and a first receiving circuit 106.

[0052] The adjustment structure is used to adjust the optical axes of the first laser emitter 101, the second laser emitter 102, and the laser receiver 103 to be aligned.

[0053] Specifically, the optical axis refers to the central axis of light propagation in an optical system, and alignment refers to the precise alignment of the optical axes of the three components through a precision adjustment mechanism, which is also the core requirement of common aperture design.

[0054] Furthermore, in one embodiment, the first narrowband filter 7 has a first set half-width, the second narrowband filter 11 has a second set half-width, and the first set half-width is greater than the second set half-width.

[0055] Preferably, the first half-width is set to 5nm and the second half-width is set to 3nm.

[0056] Furthermore, in one embodiment, the first detector 5 is an InGaAs-APD detector with a response band of 900~1700nm; the second detector 13 is a Si-APD detector with a response band of 400~1100nm.

[0057] Furthermore, in one embodiment, the first laser emitter 101 includes an erbium glass laser emitter and a first beam expander, and the second laser emitter 102 employs an Nd:YAG laser emitter and a second beam expander. The eye-safe laser emitter uses an erbium glass laser emitter, which is a mature and stable technology with small size and low power consumption.

[0058] Furthermore, the divergence angle collimation of the laser beam emitted from the erbium glass laser emitter and passing through the first beam expander reaches within 0.5 mrad; the divergence angle collimation of the laser beam emitted from the Nd:YAG laser emitter and passing through the second beam expander reaches within 0.3 mrad.

[0059] Furthermore, the first beam expander includes a 1064nm laser emitting objective lens 1 and a 1064nm laser emitting eyepiece 2, with the 1064nm laser emitting eyepiece 2 and the 1064nm laser emitting objective lens 1 arranged sequentially along the laser propagation direction of the Nd:YAG laser emitter. The second beam expander includes an eye-safe laser emitting objective lens 3 and an eye-safe laser emitting eyepiece 4, with the eye-safe laser emitting eyepiece 4 and the eye-safe laser emitting objective lens 3 arranged sequentially along the laser propagation direction of the erbium glass laser emitter.

[0060] Furthermore, a laser receiving focusing lens 6 with an eye-safe wavelength band is disposed between the first narrowband filter 7 and the first detector 5. A laser receiving focusing lens 12 with a wavelength band of 1064nm is disposed between the second narrowband filter 11 and the second detector 13. A receiving eyepiece 9 and a receiving objective lens 8 are disposed sequentially in the opposite direction to the laser propagation direction on the beam splitter 10; the receiving objective lens 8 is coated with anti-reflection modes for both the eye-safe wavelength band and the 1064nm wavelength band.

[0061] Specifically, Figure 1 The receiving optical assembly shown includes an eye-safe band laser receiving focusing lens 6, a first narrowband filter 7, a receiving objective lens 8, a receiving eyepiece 9, a beam splitter 10, a second narrowband filter 11, and a 1064nm band laser receiving focusing lens 12.

[0062] Furthermore, the laser wavelengths that are safe for human eyes are 1535nm, 1550nm, or 1570nm.

[0063] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0064] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A common-aperture laser illuminator for eye-safe ranging, characterized in that, include: A first laser emitter (101) for emitting a laser in a human eye-safe wavelength band. A second laser emitter (102) is used to emit 1064nm band lasers, and only one of the two laser emitters is in operation at any given time. A laser receiver (103) that receives lasers in two wavelength bands includes a beam splitter (10) that splits the received laser into two paths. One path of the laser propagation direction is sequentially equipped with a first narrowband filter (7) with a center wavelength in the human eye-safe band and a first detector (5) for receiving lasers in the human eye-safe band. The other path of the laser propagation direction is sequentially equipped with a second narrowband filter (11) with a center wavelength of 1064nm and a second detector (13) for receiving lasers in the 1064nm band.

2. A co-boreshaft eye safety rangefinder laser illuminator as claimed in claim 1, characterized in that: The first laser emitter (101) and the first detector (5) work together to measure the distance to targets within the range of both human eye-safe laser and 1064nm laser. The second laser emitter (102) and the second detector (13) work together to perform ultra-long-distance ranging when the target distance exceeds the maximum range of lasers in the safe band for human eyes; The second laser emitter (102) is also used to irradiate when the target distance obtained by auxiliary ranging before human eye-safe laser irradiation is within the safe irradiation range of 1064nm laser.

3. A co-boreshaft eye safety rangefinder laser illuminator as claimed in claim 1, characterized in that: The laser irradiator also includes a control drive circuit (104); the first laser emitter (101) and the second laser emitter (102) are both connected to the control drive circuit (104), the first detector (5) is connected to the control drive circuit (104) via a first receiving circuit (106), and the second detector (13) is connected to the control drive circuit (104) via a second receiving circuit (105).

4. A common-aperture laser illuminator for safe human eye ranging as described in claim 3, characterized in that: The laser irradiator also includes a base structure and an adjustment structure; The base structure accommodates and mounts a first laser emitter (101), a second laser emitter (102), a laser receiver (103), a control drive circuit (104), a second receiving circuit (105), and a first receiving circuit (106); the adjustment structure is used to adjust the optical axes of the first laser emitter (101), the second laser emitter (102), and the laser receiver (103) to be aligned.

5. A common-aperture laser illuminator for safe human eye ranging as described in claim 1, characterized in that: The first narrowband filter (7) has a first set half-width, and the second narrowband filter (11) has a second set half-width, and the first set half-width is greater than the second set half-width.

6. A co-axial eye-safe rangefinder laser illuminator as claimed in claim 1, characterized in that: The first detector (5) is an InGaAs-APD detector with a response band of 900~1700nm; the second detector (13) is a Si-APD detector with a response band of 400~1100nm.

7. A common-aperture laser illuminator for safe human eye ranging as described in claim 1, characterized in that: The first laser emitter (101) includes an erbium glass laser emitter and a first beam expander, and the second laser emitter (102) employs an Nd:YAG laser emitter and a second beam expander.

8. A co-axial eye-safe rangefinder laser illuminator as claimed in claim 7, characterized in that: The first beam expander includes a 1064nm band laser emitting objective (1) and a 1064nm band laser emitting eyepiece (2). The 1064nm band laser emitting eyepiece (2) and the 1064nm band laser emitting objective (1) are arranged sequentially in the laser propagation direction of the Nd:YAG laser emitter. The second beam expander includes an eye-safe laser emission objective (3) and an eye-safe laser emission eyepiece (4), with the eye-safe laser emission eyepiece (4) and the eye-safe laser emission objective (3) arranged sequentially in the laser propagation direction of the erbium glass laser emitter.

9. A common-aperture laser illuminator for safe human eye ranging as described in claim 1, characterized in that: A human eye-safe band laser receiving focusing lens (6) is also provided between the first narrow band filter (7) and the first detector (5), and a 1064nm band laser receiving focusing lens (12) is also provided between the second narrow band filter (11) and the second detector (13). The beam splitter (10) is provided with a receiving eyepiece (9) and a receiving objective lens (8) in the opposite direction to the laser propagation direction; the receiving objective lens (8) is coated with anti-reflection modes for both the human eye-safe band and the 1064nm band.

10. A co-boreshaft eye-safe rangefinder laser illuminator according to any one of claims 1 to 9, characterized in that: The laser wavelength safe for human eyes is a 1535nm, 1550nm, or 1570nm laser.

Images