Calibrating and aiming objective lens of measuring and illuminating device

Abstract

The invention relates to a sighting objective lens of an illuminator in the technical field of imaging lenses, which comprises a front fixed group, a zoom group, a rear fixed group, a first image rotation reflector, a second image rotation reflector, an optical filter and an imaging target surface along the light incidence direction, wherein the front fixed group comprises a first lens, a second lens and a third lens; the zoom group comprises a fourth lens, a fifth lens and a sixth lens; and the rear fixed group comprises a seventh lens, an eighth lens and a ninth lens. The first lens and the second lens of the front fixed group are glued, the fourth lens and the fifth lens of the zoom group are glued, and the eighth lens and the ninth lens of the rear fixed group are glued. The sighting objective lens of the measuring and illuminating device has the characteristics of good consistency of two-gear zoom optical axes, sharing of near-infrared and 1064nm wavelength laser light paths, compact size, good imaging effect and the like; in addition, through switching of the optical filter, monitoring and axis calibration of laser with the wavelength of 1064 nm and long-distance fog-penetrating observation aiming can be carried out.

Description

Technical Field

[0001] The invention belongs to the technical field of imaging lenses, and in particular relates to an illumination meter aiming objective lens. Background Art

[0002] In order to monitor and test the long-distance distance measurement and illumination capabilities of the light meter, a high-magnification rifle scope is usually used as the aiming lens. For existing high-magnification rifle scopes, the imaging system using the visible light band cannot be used for long-distance observation in haze weather with low visibility due to the strong atmospheric scattering effect, which in turn affects the performance index test of the light meter. The light meter emits a laser spot with a wavelength of 1064nm, which cannot be observed by existing high-magnification rifle scopes. Therefore, there is a lack of detection equipment that can observe the laser spot of the light meter from a long distance.

[0003] In the design of optical systems, although the continuous zoom system can achieve continuous clear imaging of the target during the entire zooming process, the system is complex and difficult to process and assemble, which will affect the final imaging effect; at the same time, during the zooming process, due to the jitter of the optical axis, it is difficult to achieve stable aiming, which in turn affects the accuracy of long-distance aiming and even creates the risk of missing the target. The two-speed zoom optical system has a relatively simple structure and higher reliability, and can take into account the switching of large and small fields of view and the stability of the optical axis.

[0004] In the prior art, for example, the short-wave infrared two-speed zoom lens described in the patent document of publication number CN 112162392 A has excellent imaging effect, but the optical zoom ratio is only 2 times, TLL / f max It is also large, and the optical materials used are CaF2 crystal and chalcogenide glass, which are relatively expensive. Another example is the zoom lens described in the patent document with application number CN 202310450731.5, whose dual-band optical path adopts a beam splitter prism and a dual CMOS solution, and the system is complex and costly. Another example is the near-infrared telephoto optical lens described in the patent document with publication number CN 111367050A, whose ratio of focal length to total system length is relatively small, and cannot meet the needs of miniaturization.

[0005] In summary, there is currently a lack of an aiming objective lens that has strong environmental adaptability, low cost, stability and reliability, and high functional integration to meet current needs. Summary of the invention

[0006] In view of the above situation, in order to solve the problems in the prior art, the present invention provides a light meter aiming objective lens, which has the characteristics of good consistency of zoom optical axis, sharing of near-infrared and 1064nm dual-band optical paths, long focal length, compact size, good imaging effect, etc.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions: A light meter aiming objective lens comprises a lens, wherein the lens comprises a front fixed group, a zoom group, a rear fixed group, a first image transfer reflector, a second image transfer reflector, a filter, and an imaging target surface, which are arranged in sequence from front to back along a light incident direction; The front fixed group includes a first lens, a second lens, and a third lens; the zoom group includes a fourth lens, a fifth lens, and a sixth lens; and the rear fixed group includes a seventh lens, an eighth lens, and a ninth lens. The first lens of the front fixed group is glued to the second lens, the fourth lens of the variable power group is glued to the fifth lens, and the eighth lens of the rear fixed group is glued to the ninth lens.

[0008] Furthermore, the first lens to the ninth lens of the lens are all made of glass materials, and their corresponding curvature radii satisfy the following conditions in sequence: 200 mm<R1<400 mm, 80 mm<R1′<200 mm, 80 mm<R2<200 mm, 600 mm<R2′<1500 mm, 80 mm<R3<200 mm, -4000 mm<R3′<-2000 mm, 400 mm<R4<800 mm, 30 mm<R4′<60 mm, 30 mm<R5<60 mm, 80 mm<R5′<200 mm, -150 mm<R6<-80 mm, 60 mm<R6′<150 mm, 100 mm<R7<1200 mm, -150 mm<R7′<-80 mm, 200 mm<R8<800 mm, -150 mm<R8′<-50 mm, -150 mm<R9<-50 mm, -400 mm<R9′<-200 mm, Wherein, R1-R9 are the curvature radii of the first lens to the ninth lens in the light incident direction, and R1′-R9′ are the curvature radii of the first lens to the ninth lens in the direction opposite to the light incident direction.

[0009] Furthermore, the lens satisfies f:D≤7, TLL / f max <0.38, Where, f is the focal length of the objective lens of the light meter; f maxis the focal length of the telephoto end of the light meter aiming objective, which is 700mm; D is the light aperture of the light meter aiming objective, which is 100mm, the effective aperture of the first lens; TLL is the total length of the light meter aiming objective after being folded by the image-transmitting reflector 1 and the image-transmitting reflector 2, that is, the distance from the vertex of the first lens in the direction of light incidence to the vertex of the image-transmitting reflector 1 away from the first lens.

[0010] The lens changes the optical path by switching the filter to achieve dual-band optical path confocality.

[0011] Furthermore, the glass materials of the first lens to the ninth lens of the lens meet the following optical conditions: 1.78<n1<1.82,40<v1<50, 1.45<n2<1.55,80<v2<96, 1.45<n3<1.55,80<v3<96, 1.70<n4<1.80,20<v4<45, 1.80<n5<2.00,15<v5<20, 1.55<n6<1.65,45<v6<65, 1.55<n7<1.65,45<v7<65, 1.45<n8<1.60,45<v8<70, 1.80<n9<2.00,15<v9<25, Wherein, n1-n9 are the refractive indices of the glass materials of the first lens to the ninth lens, and v1-v9 are the Abbe numbers of the glass materials of the first lens to the ninth lens.

[0012] Furthermore, the air gap between the second lens and the third lens is 0.1-1mm; the air gap between the third lens and the fourth lens is 25-150mm; the air gap between the fifth lens and the sixth lens is 3-6mm; the air gap between the sixth lens and the seventh lens is 2-125mm; the air gap between the seventh lens and the eighth lens is 0.1-1mm; the air gap between the ninth lens and the image transfer mirror 1 is 25-30mm; the air gap between the image transfer mirror 1 and the image transfer mirror 2 is 70-90mm; the air gap between the image transfer mirror 2 and the filter is 130-150mm; and the air gap between the filter and the imaging target surface is 15-25mm.

[0013] Furthermore, the angles between the normal lines of the first image-transmitting reflector and the second image-transmitting reflector and their corresponding optical axis directions are both 45°.

[0014] Furthermore, the glass thickness of the first lens to the ninth lens meets the following conditions: 4mm <L1<8mm, 12mm<L2<20mm, 12mm<L3<20mm, 2mm <L4<5mm, 6mm<L5<10mm, 2mm <L6<5mm, 5mm <L7<8mm, 5mm <L8<8mm, 2mm <L9<5mm; Wherein, L1 to L9 are the glass thicknesses of the first lens to the ninth lens respectively.

[0015] Furthermore, the operating wavelength range of the lens is 800nm-950nm, and by switching the filter of the lens, the laser spot imaging with a wavelength of 1064nm can be taken into account.

[0016] Furthermore, the lens has a two-step zoom function of focal lengths of 150 mm and 700 mm, and a zoom ratio of more than 4.5 times; that is, by moving the zoom group in the direction of the optical axis, the focal length can be changed and the imaging quality can be guaranteed.

[0017] Furthermore, the imaging target surface of the lens can match a low-illumination CMOS movement or a short-wave infrared movement with high sensitivity to the near-infrared band.

[0018] The present invention also includes other components that enable it to be used normally, all of which are conventional means in the field. In addition, devices or components not limited in the present invention, such as image transfer reflectors, filters, imaging targets, etc., all adopt the existing technology in the field.

[0019] The beneficial effects of the present invention are as follows: 1) The objective lens has two magnification levels of 150mm and 700mm, the overall length is less than 260mm, and the structure is simple and compact; 2) The lens has simple and reliable zoom, good optical axis consistency, compact structure, high environmental adaptability and reliability; 3) The near-infrared and 1064nm dual-band optical paths are shared, which can take into account both aiming and axis calibration, with high functional integration; 4) Nine pieces of conventional glass materials are used, no special optical glass, a single set of optical structure moves, and the entire system is stable and reliable; 5) The imaging target surface can match the low-light CMOS movement with higher sensitivity in the near-infrared band, saving costs. At the same time, the MTF of imaging at both magnifications in the near-infrared band reaches the diffraction limit, and the imaging effect is good; 6) By switching the filter, it is possible to monitor and calibrate the 1064nm wavelength laser, as well as observe and aim through fog at a long distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the lens in Example 1 at 150mm.

[0021] Figure 2 Schematic diagram of the lens in Example 1 at 700mm.

[0022] Figure 3 Schematic diagram of the lens in Example 1 under 700mm axis alignment state.

[0023] Figure 4 This is an optical transfer function (MTF) curve of the lens in Example 1 at 150mm.

[0024] Figure 5 This is a graph of the optical transfer function (MTF) of the lens in Example 1 at 700mm.

[0025] Figure 6 This is a graph of the optical transfer function (MTF) of the lens in Example 1 when it is aligned at 700mm.

[0026] Figure 7 This is the point diagram of the lens in Example 1 at 150mm.

[0027] Figure 8 This is the point diagram of the lens in Example 1 at 700mm.

[0028] Fig. 9 This is the point diagram of the lens in Example 1 when it is aligned at 700mm.

[0029] Fig.10 This is the aberration diagram of the lens in Example 1 at 150mm.

[0030] Fig.11 This is the aberration diagram of the lens in Example 1 at 700mm.

[0031] Fig.12 This is an optical transfer function (MTF) curve of the lens in Example 2 at 150mm.

[0032] Fig.13 This is a graph of the optical transfer function (MTF) of the lens in Example 2 at 700mm.

[0033] Fig.14 This is a graph of the optical transfer function (MTF) of the lens in Example 2 when it is aligned at 700mm.

[0034] Fig.15 It is a transmittance curve diagram of the filter of the lens in Examples 1 and 2. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0036] Example 1 like Figure 1 As shown, the present embodiment provides a light meter aiming objective lens, comprising a lens, wherein the lens comprises a front fixed group 01, a zoom group 02, a rear fixed group 03, an image transfer mirror 10, an image transfer mirror 2 11, a filter 12, and an imaging target surface 13, which are arranged in sequence from front to back along the incident direction of light.

[0037] Among them, the front fixed group 01 includes a first lens 1, a second lens 2, and a third lens 3; the zoom group 02 includes a fourth lens 4, a fifth lens 5, and a sixth lens 6; the rear fixed group 03 includes a seventh lens 7, an eighth lens 8, and a ninth lens 9; at this time, the light finder is in a state when the aiming lens is 150mm.

[0038] The first lens 1 of the front fixed group 01 is glued to the second lens 2 , the fourth lens 4 of the zoom group 02 is glued to the fifth lens 5 , and the eighth lens 8 of the rear fixed group 03 is glued to the ninth lens 9 .

[0039] Furthermore, the first lens 1 to the ninth lens 9 of the lens are all made of glass materials, and their corresponding curvature radii satisfy the following conditions in sequence: 200 mm<R1<400 mm, 80 mm<R1′<200 mm, 80 mm<R2<200 mm, 600 mm<R2′<1500 mm, 80 mm<R3<200 mm, -4000 mm<R3′<-2000 mm, 400 mm<R4<800 mm, 30 mm<R4′<60 mm, 30 mm<R5<60 mm, 80 mm<R5′<200 mm, -150 mm<R6<-80 mm, 60 mm<R6′<150 mm, 100 mm<R7<1200 mm, -150 mm<R7′<-80 mm, 200 mm<R8<800 mm, -150 mm<R8′<-50 mm, -150 mm<R9<-50 mm, -400 mm<R9′<-200 mm, Among them, R1-R9 are the curvature radii of the first lens 1 to the ninth lens 9 in the light incident direction, and R1′-R9′ are the curvature radii of the first lens 1 to the ninth lens 9 in the direction opposite to the light incident direction.

[0040] Furthermore, the lens satisfies f:D≤7, TLL / f max <0.38, Where, f is the focal length of the objective lens of the light meter; f max is the focal length of the telephoto end of the light meter aiming lens, which is 700mm; D is the light aperture of the light meter aiming lens, which is 100mm, the effective aperture of the first lens 1; TLL is the total length of the light meter aiming lens after being folded by the image transfer reflector 10 and the image transfer reflector 2 11, that is, the distance from the vertex of the first lens 1 in the direction of incident light to the vertex of the end of the image transfer reflector 10 away from the first lens 1.

[0041] Furthermore, the lens can change the optical path by switching the filter 12 to achieve dual-band optical path confocality.

[0042] Furthermore, the glass materials of the first lens 1 to the ninth lens 9 of the lens meet the following optical conditions: 1.78<n1<1.82,40<v1<50, 1.45<n2<1.55,80<v2<96, 1.45<n3<1.55,80<v3<96, 1.70<n4<1.80,20<v4<45, 1.80<n5<2.00,15<v5<20, 1.55<n6<1.65,45<v6<65, 1.55<n7<1.65,45<v7<65, 1.45<n8<1.60,45<v8<70, 1.80<n9<2.00,15<v9<25, Wherein, n1-n9 are the refractive indices of the glass materials of the first lens 1 to the ninth lens 9, and v1-v9 are the Abbe numbers of the glass materials of the first lens 1 to the ninth lens 9.

[0043] Furthermore, the air gap between the second lens 2 and the third lens 3 is 0.1-1mm; the air gap between the third lens 3 and the fourth lens 4 is 25-150mm; the air gap between the fifth lens 5 and the sixth lens 6 is 3-6mm; the air gap between the sixth lens 6 and the seventh lens 7 is 2-125mm; the air gap between the seventh lens 7 and the eighth lens 8 is 0.1-1mm; the air gap between the ninth lens 9 and the image transfer mirror 1 10 is 25-30mm; the air gap between the image transfer mirror 1 10 and the image transfer mirror 2 11 is 70-90mm; the air gap between the image transfer mirror 2 11 and the filter 12 is 130-150mm; and the air gap between the filter 12 and the imaging target surface 13 is 15-25mm.

[0044] Specifically, the lens in this embodiment meets the following optical conditions such as curvature radius, air gap, etc., as shown in the following table:

[0045] The specific data of variables D1 and D2 when the lens is at the 150mm end and the 700mm end are shown in the following table:

[0046] At this time, based on the above data, we can obtain Figure 4-11 Technical indicators shown.

[0047] Furthermore, the angles between the normal lines of the image-transmitting reflector 1 10 and the image-transmitting reflector 2 11 and their corresponding optical axis directions are both 45°.

[0048] Furthermore, the glass thickness of the first lens 1 to the ninth lens 9 meets the following conditions: 4mm <L1<8mm, 12mm<L2<20mm, 12mm<L3<20mm, 2mm <L4<5mm, 6mm<L5<10mm, 2mm <L6<5mm, 5mm <L7<8mm, 5mm <L8<8mm, 2mm <L9<5mm; Wherein, L1 to L9 are glass thicknesses of the first lens 1 to the ninth lens 9 respectively.

[0049] Specifically, when the photometer collimating lens is in the calibrated state, the filter is used as follows: Figure 3Placed as shown, only the 1064nm laser signal can be received for optical axis correction of the light detector. The thickness of the filter is 0.4mm.

[0050] Furthermore, the operating wavelength range of the lens is 800nm-950nm, and by switching the filter 12 of the lens, the laser spot imaging with a wavelength of 1064nm can be taken into consideration.

[0051] Furthermore, the lens has a two-step zoom function of focal lengths of 150 mm and 700 mm, and a zoom ratio of more than 4.5 times; that is, by moving the zoom group 02 in the direction of the optical axis, the focal length can be changed and the imaging quality can be guaranteed.

[0052] Specifically, when the light meter collimating lens is zoomed, the zoom group 02 will move along the optical axis by 121.4 mm. The appearance after zooming to 700 mm is as follows: Figure 2 shown.

[0053] Furthermore, the imaging target surface 13 of the lens can match a low-illumination CMOS movement or a short-wave infrared movement with high sensitivity to the near-infrared band.

[0054] Specifically, the optical transfer function (MTF) curve of this embodiment is as follows: Figure 4 - 6, the eight curves in the figure are respectively the meridian and sagittal modulation transfer function curves at image plane heights of 0mm, 3mm, 5.5mm and 8mm, wherein the abscissa represents the spatial frequency of line pairs / millimeter (lp / mm), the ordinate represents the MTF value, the higher the curve is, the better the imaging quality is, the vertical axis MODULUS OF THE OTF in which OTF stands for optical transfer function, which refers to optical transfer function. In this embodiment, the vertical axis is the optical modulation transfer function, that is, MTF, T is the meridian transfer function curve, and S is the sagittal transfer function curve.

[0055] like Figure 4 As shown, through the eight curves, it can be determined that when the lens of this embodiment is 150mm, within the wavelength range of 800nm-950nm, under the condition of 1 / 2 frequency (Nyquist frequency) (the Nyquist frequency of this embodiment is 80lp / mm), the meridian and sagittal modulation transfer function curves are greater than 0.3, and the curves are close to the diffraction limit (TS Diff.limit), indicating that the imaging quality is good.

[0056] like Figure 5As shown, through the eight curves, it can be determined that when the lens of this embodiment is 700mm, within the wavelength range of 800nm-950nm, under the condition of 1 / 2 frequency (Nyquist frequency) (the Nyquist frequency of this embodiment is 80lp / mm), most of the meridian and sagittal modulation transfer function curves are greater than 0.3, and the curve is close to the diffraction limit (TSDiff.limit), indicating that the imaging quality is good.

[0057] like Figure 6 As shown, through the eight curves, it can be determined that when the lens of this embodiment is 700mm at a wavelength of 1064nm, under the 1 / 2 frequency (Nyquist frequency) condition (the Nyquist frequency of this embodiment is 33lp / mm), the meridian and sagittal modulation transfer function curves are greater than 0.3, indicating that the imaging quality is good.

[0058] like Figure 7-9 As shown in the figure, the diffuse spot sizes of the spot diagram at the 150mm end, 700mm end, and 700mm short-wave infrared end of the lens are all smaller than or close to the Airy disk size, indicating that the imaging quality is good.

[0059] like Figure 10-11 As shown, the aberration curve at the 150mm end of the lens is ≤0.25mm, and the aberration curve at the 700mm end of the lens is ≤0.15mm, indicating that the aberration correction is better.

[0060] Example 2 On the basis of Example 1, this embodiment provides a light meter aiming objective lens, specifically, its lens satisfies the following optical conditions, as shown in the following table:

[0061] The specific data of variables D1 and D2 when the lens is at the 150mm end and the 700mm end are shown in the following table:

[0062] Based on the above data, we can obtain Figure 12-14 The technical indicators described.

[0063] The optical transfer function (MTF) curve of this embodiment is as follows: Figure 12-15As shown in the figure, the eight curves are respectively for the meridian and sagittal modulation transfer function curves at image plane heights of 0mm, 3mm, 5.5mm and 8mm, wherein the abscissa represents the spatial frequency of line pairs / millimeter (lp / mm), and the ordinate represents the MTF value. The higher the curve is, the better the imaging quality is. The vertical axis MODULUSOF THE OTF in which OTF stands for optical transfer function, refers to optical transfer function. In this embodiment, the vertical axis is the optical modulation transfer function, that is, MTF, T is the meridian transfer function curve, and S is the sagittal transfer function curve.

[0064] like Fig.12 As shown, through the eight curves, it can be determined that when the lens of this embodiment is 150mm, within the wavelength range of 800nm-950nm, under the condition of 1 / 2 frequency (Nyquist frequency) (the Nyquist frequency of this embodiment is 80lp / mm), the meridian and sagittal modulation transfer function curves are greater than 0.3, and the curves are close to the diffraction limit (TS Diff.limit), indicating that the imaging quality is good.

[0065] like Fig.13 As shown, through the eight curves, it can be determined that when the lens of this embodiment is 700mm, within the wavelength range of 800nm-950nm, under the condition of 1 / 2 frequency (Nyquist frequency) (the Nyquist frequency of this embodiment is 80lp / mm), most of the meridian and sagittal modulation transfer function curves are greater than 0.3, and the curve is close to the diffraction limit (TSDiff.limit), indicating that the imaging quality is good.

[0066] like Fig.14 As shown, through the eight curves, it can be determined that when the lens of this embodiment is 700mm at a wavelength of 1064nm, under the 1 / 2 frequency (Nyquist frequency) condition (the Nyquist frequency of this embodiment is 33lp / mm), the meridian and sagittal modulation transfer function curves are greater than 0.3, indicating that the imaging quality is good.

[0067] like Fig.15 As shown in the transmittance curve of the filter, the horizontal coordinate represents the wavelength, and the vertical coordinate represents the transmittance. It can be seen from the figure that the transmittance is greater than 95% near 1064nm, while the transmittance in other bands is less than 1%.

[0068] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field. Any technical deformation made within the spirit and principles of the present invention falls within the protection scope of the present invention.

Claims

1. A photometer aiming lens, comprising a lens, characterized in that: The lens comprises a front fixed group (01), a zoom group (02), a rear fixed group (03), a first image transfer reflector (10), a second image transfer reflector (11), a filter (12), and an imaging target surface (13), which are arranged in sequence from front to back along the incident direction of light. The front fixed group (01) comprises a first lens (1), a second lens (2), and a third lens (3); the zoom group (02) comprises a fourth lens (4), a fifth lens (5), and a sixth lens (6); and the rear fixed group (03) comprises a seventh lens (7), an eighth lens (8), and a ninth lens (9); The first lens (1) of the front fixed group (01) is glued to the second lens (2), the fourth lens (4) of the variable power group (02) is glued to the fifth lens (5), and the eighth lens (8) of the rear fixed group (03) is glued to the ninth lens (9).

2. The aiming lens for an illumination device according to claim 1, characterized in that: The first lens (1) to the ninth lens (9) of the lens are all made of glass material, and their corresponding curvature radii satisfy the following conditions in sequence: 200 mm<R1<400 mm, 80 mm<R1′<200 mm, 80 mm<R2<200 mm, 600 mm<R2′<1500 mm, 80 mm<R3<200 mm, -4000 mm<R3′<-2000 mm, 400 mm<R4<800 mm, 30 mm<R4′<60 mm, 30 mm<R5<60 mm, 80 mm<R5′<200 mm, -150 mm<R6<-80 mm, 60 mm<R6′<150 mm, 100 mm<R7<1200 mm,-150 mm<R7′<-80 mm, 200 mm<R8<800 mm, -150 mm<R8′<-50 mm, -150 mm<R9<-50 mm, -400 mm<R9′<-200 mm, Wherein, R1-R9 are the curvature radii of the first lens (1) to the ninth lens (9) in the direction of incident light, and R1′-R9′ are the curvature radii of the first lens (1) to the ninth lens (9) in the direction opposite to the direction of incident light.

3. The aiming lens for an illumination device according to claim 1, characterized in that: The lens satisfies f:D≤7, TLL / f max <0.38; Where, f is the focal length of the objective lens of the light meter; f max is the focal length of the telephoto end of the light meter aiming lens, which is 700 mm; D is the aperture of the light meter aiming lens, which is the effective aperture of the first lens (1), which is 100 mm; TLL is the total length of the light meter aiming lens after being folded by the image transfer reflector 1 (10) and the image transfer reflector 2 (11).

4. The aiming lens for an illumination device according to claim 1, characterized in that: The glass materials of the first lens (1) to the ninth lens (9) of the lens meet the following optical conditions: 1.78<n1<1.82,40<v1<50, 1.45<n2<1.55,80<v2<96, 1.45<n3<1.55,80<v3<96, 1.70<n4<1.80,20<v4<45, 1.80<n5<2.00,15<v5<20, 1.55<n6<1.65,45<v6<65, 1.55<n7<1.65,45<v7<65, 1.45<n8<1.60,45<v8<70, 1.80<n9<2.00,15<v9<25, Wherein, n1-n9 are the refractive indices of the glass materials of the first lens (1) to the ninth lens (9), and v1-v9 are the Abbe numbers of the glass materials of the first lens (1) to the ninth lens (9).

5. The aiming lens for an illumination device according to claim 1, characterized in that: The air gap between the second lens (2) and the third lens (3) is 0.1-1 mm; the air gap between the third lens (3) and the fourth lens (4) is 25-150 mm; the air gap between the fifth lens (5) and the sixth lens (6) is 3-6 mm; the air gap between the sixth lens (6) and the seventh lens (7) is 2-125 mm; the air gap between the seventh lens (7) and the eighth lens (8) is 0.1-1 mm; the air gap between the ninth lens (9) and the image transfer mirror 1 (10) is 25-30 mm; the air gap between the image transfer mirror 1 (10) and the image transfer mirror 2 (11) is 70-90 mm; the air gap between the image transfer mirror 2 (11) and the filter (12) is 130-150 mm; and the air gap between the filter (12) and the imaging target surface (13) is 15-25 mm.

6. The aiming lens for an illumination device according to claim 1, characterized in that: The angles between the normal lines of the image-transmitting reflector 1 (10) and the normal lines of the image-transmitting reflector 2 (11) and their respective corresponding optical axis directions are both 45°.

7. The aiming lens for an illumination device according to claim 1, characterized in that: The glass thickness of the first lens (1) to the ninth lens (9) meets the following conditions: 4mm <L1<8mm, 12mm<L2<20mm, 12mm<L3<20mm, 2mm <L4<5mm, 6mm<L5<10mm, 2mm <L6<5mm, 5mm <L7<8mm, 5mm <L8<8mm, 2mm <L9<5mm; Wherein, L1 to L9 are the glass thicknesses of the first lens (1) to the ninth lens (9) respectively.

8. The aiming lens for an illumination device according to claim 1, characterized in that: The operating wavelength range of the lens is 800nm-950nm, and by switching the filter (12) of the lens, laser spot imaging with a wavelength of 1064nm can be taken into account.

9. The photometer aiming lens according to claim 1, characterized in that: The lens has a two-step zoom function with focal lengths of 150 mm and 700 mm.

10. The photometer collimating objective lens according to claim 1, characterized in that: The imaging target surface (13) of the lens can match a near-infrared sensitive low-illumination CMOS movement or a short-wave infrared movement.

Images