A system, device and method for external function expansion of visual instrument

Abstract

The present invention discloses a system, device and method for external function expansion of visual instruments. The device adopts a semi-reflective and semi-transmissive mirror and a CMOS image sensor to add a digital imaging function to the visual instrument. At the same time, a telescopic optical path is adopted to ensure the eye distance of the original visual instrument, and the visual function is optimized and upgraded on the basis of adding the digital imaging function. It has wide compatibility with different visual instruments. The system has excellent imaging performance, simple structure and easy installation. The present invention enables the visual instrument to have the diversified functions of both visual observation and digital imaging after being connected.

Description

Technical Field

[0001] The present invention relates to the field of lens imaging technology, and in particular to a system, device and method for external function expansion of visual instruments. Background Art

[0002] With the continuous advancement of science and technology and the gradual increase in application scenarios, visual instruments must not only provide direct human eye observation functions, but also have certain digital recording functions. At present, visual instrument products that integrate visual functions and digital imaging have been developed. However, such products generally have a high degree of integration, and the digital imaging part is tightly packaged with the visual instrument, so that users cannot disassemble it freely. And such products cannot provide users with the use of separate optical system modules on the instrument. In addition, if the visual instruments that have been installed in various application scenarios want to add digital imaging functions, they need to be re-developed and designed, which is time-consuming and labor-intensive. At present, there is an urgent need for an adapter that can expand visual functions and digital functions. If a digital imaging system is added directly to the visual instrument, the original visual function will be lost, or the eye distance in the visual optical path will be reduced, which is not conducive to user use. Moreover, the expansion heads currently on the market are only suitable for a specific visual instrument, and have poor compatibility with different models of visual instruments and low extensibility. Summary of the invention

[0003] In view of the above problems, the present invention proposes a system, device and method for external function expansion of visual instruments. A semi-reflective and semi-transmissive mirror and a CMOS image sensor are used to add a digital imaging function to the visual instrument. At the same time, a telescopic optical path is used to ensure the eye distance of the original visual instrument, and the visual function is optimized and upgraded on the basis of adding the digital imaging function. It has a wide compatibility with different visual instruments. The system has excellent imaging performance, a simple structure and easy installation. The present invention enables the visual instrument to have the diversified functions of both visual observation and digital imaging after being connected.

[0004] The function expansion device for visual instruments includes: an optical system, a mechanical packaging component, an image processing system, and a power supply system.

[0005] The optical system includes an objective lens group, an imaging lens group and an eyepiece group.

[0006] The objective lens group comprises: a first lens, a second lens and a third lens.

[0007] The imaging lens group includes: a fourth semi-reflective and semi-transmissive mirror, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens.

[0008] The eyepiece assembly comprises: a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens.

[0009] The object side curvature radius R1 of the first lens and the image side curvature radius R2 of the first lens satisfy the following relationship: (R1+R2) / (R1-R2)=0.23; the object side curvature radius R3 of the second lens and the image side curvature radius R4 of the second lens satisfy the following relationship: (R3+R4) / (R3-R4)=-1.9; the object side curvature radius R5 of the third lens and the image side curvature radius R6 of the third lens satisfy the following relationship: (R5+R6) / (R5-R6)=16.5; the fourth element is a semi-reflective and semi-transmissive mirror, reflecting The rate is 0.3, the transmittance is 0.7; the object side surface curvature radius R9 of the fifth lens and the image side surface curvature radius R10 of the fifth lens satisfy the following relationship: (R9+R10) / (R9-R10)=1; the object side surface curvature radius R11 of the sixth lens and the image side surface curvature radius R12 of the sixth lens satisfy the following relationship: (R11+R12) / (R11-R12)=0; the object side surface curvature radius R13 of the seventh lens and the image side surface curvature radius R14 of the seventh lens satisfy the following relationship: (R13+R14) / (R13-R14)=0 The object side surface curvature radius R15 of the eighth lens and the image side surface curvature radius R16 of the eighth lens satisfy the following relationship: (R15+R16) / (R15-R16)=0.17; the object side surface curvature radius R17 of the ninth lens and the image side surface curvature radius R18 of the ninth lens satisfy the following relationship: (R17+R18) / (R17-R18)=1; the object side surface curvature radius R19 of the tenth lens and the image side surface curvature radius R20 of the tenth lens satisfy the following relationship: (R19+R20) / (R19-R20)=-0.15; The object side surface curvature radius R21 of the eleventh lens and the image side surface curvature radius R22 of the eleventh lens satisfy the following relationship: (R21+R22) / (R21-R22)=2; the object side surface curvature radius R23 of the twelfth lens and the image side surface curvature radius R24 of the twelfth lens satisfy the following relationship: (R23+R24) / (R23-R24)=0.29; the object side surface curvature radius R25 of the thirteenth lens and the image side surface curvature radius R26 of the thirteenth lens satisfy the following relationship: (R25+R26) / (R25-R26)=-1;

[0010] The function expansion optical system for visual instruments has a first lens that is a convex lens, a second lens that is a concave lens, a third lens that is a concave lens, a fourth lens that is a semi-reflective and semi-transmissive mirror, a fifth lens that is a convex lens, a sixth lens that is a convex lens, a seventh lens that is a convex lens, an eighth lens that is a concave lens, a ninth lens that is a convex lens, a tenth lens that is a convex lens, an eleventh lens that is a concave lens, a twelfth lens that is a concave lens, and a thirteenth lens that is a convex lens.

[0011] The focal length of each lens is: The focal length of the objective lens group is f 物 =157mm; the focal length of the eyepiece assembly is f 目 =21mm; the focal length of the first lens is f1=505.56mm; the focal length of the second lens is f2=704.06mm; the focal length of the third lens is f3=2911.86mm; the reflectivity of the fourth semi-transparent and semi-reflective mirror is R=0.3; the transmittance is 0.7; the focal length of the fifth lens is f5=45.69mm; the focal length of the sixth lens is f6=47.00mm; the focal length of the seventh lens is f7=168.57mm; the focal length of the eighth lens is f8=-64.73mm; the focal length of the ninth lens is f9=-98.43mm; the focal length of the tenth lens is f10=34.56mm; the focal length of the eleventh lens is f11=-87.61mm; the focal length of the twelfth lens is f12=-165.78mm; the focal length of the thirteenth lens is f13=-6765.94mm;

[0012] The center thickness of each lens is: the center thickness of the first lens is D1=6.5mm; the center thickness of the second lens is D2=5.245mm; the center thickness of the third lens is D3=5mm; the thickness of the fourth semi-reflective and semi-transmissive mirror is D4=27.4662mm; the center thickness of the fifth lens is D5=7mm; the center thickness of the sixth lens is D6=5.5mm; the center thickness of the seventh lens is D7=7mm; the center thickness of the eighth lens is D8=1.8mm; the center thickness of the ninth lens is D9=5mm; the center thickness of the tenth lens is D10=6.02mm; the center thickness of the eleventh lens is D11=3.65mm; the center thickness of the twelfth lens is D12=2.93mm; the center thickness of the thirteenth lens is D13=3mm.

[0013] The refractive index and Abbe number of each lens are as follows: the refractive index of the first lens N1 = 1.5168, the Abbe number V1 = 64.2; the refractive index of the second lens N2 = 1.6284, the Abbe number V2 = 35.9; the refractive index of the third lens N3 = 1.6826, the Abbe number V3 = 32; the reflectivity of the fourth semi-reflective semi-transmissive mirror R = 0.3, the transmittance T = 0.7; the refractive index of the fifth lens N5 = 1.5524, the Abbe number V5 = 63.3; the refractive index of the sixth lens N6 = 1.5524, the Abbe number V6 = 63.3; the refractive index of the seventh lens N7 = 1.48 74, Abbe number V7 = 70.4; the refractive index N8 of the eighth lens is 1.7285, and the Abbe number V8 is 28.3; the refractive index N9 of the ninth lens is 1.4874, and the Abbe number V9 is 70.4; the refractive index N10 of the tenth lens is 1.4874, and the Abbe number V10 is 70.4; the refractive index N11 of the eleventh lens is 1.5244, and the Abbe number V11 is 59.2; the refractive index N12 of the twelfth lens is 1.8222, and the Abbe number V12 is 37.4; the refractive index N13 of the thirteenth lens is 1.82, and the Abbe number V13 is 37.4;

[0014] Furthermore, in the imaging lens group, the transmittance of the fourth semi-reflective and semi-transmissive mirror can be adjusted independently according to user needs, and the optimal transmittance should be maintained between 0.5 and 0.7.

[0015] The mechanical packaging assembly uses 6063 aluminum alloy as the lens barrel packaging shell, as shown in the attached Figure 1 As shown, a 6063 aluminum alloy spacer is used to determine the relative position between each lens. The distance between the first lens sheet and the second lens sheet is 0mm; the distance between the second lens sheet and the third lens sheet is 71.4930mm; the distance between the third lens sheet and the fourth semi-reflective semi-transmissive mirror is 30mm; the distance between the fourth semi-reflective semi-transmissive mirror and the fifth lens sheet is 60mm; the distance between the fifth lens sheet and the sixth lens sheet is 0.2mm; the distance between the sixth lens sheet and the seventh lens sheet is 0.2mm; the distance between the seventh lens sheet and the eighth lens sheet is 0mm; the distance between the eighth lens sheet and the ninth lens sheet is 0mm; the distance between the fourth semi-reflective semi-transmissive mirror and the tenth lens sheet is 27.4622mm; the distance between the tenth lens sheet and the eleventh lens sheet is 0.2745mm; the distance between the eleventh lens sheet and the twelfth lens sheet is 0mm; the distance between the twelfth lens sheet and the thirteenth lens sheet is 0mm;

[0016] The two ends of the lens barrel are fixed with optical glue, so as to ensure that the optical components in the function expansion optical system of the visual instrument are firmly fixed inside the lens barrel. The external visual instrument is connected to the function expansion optical system of the visual instrument through the threaded knob slot, so as to ensure the stability of the connection between the entire invention instrument and the external visual instrument.

[0017] The image processing system is equipped with a CMOS image sensor and two I / O serial ports. The light reflected by the semi-reflective and semi-transmissive mirror is focused on the CMOS image sensor, thereby acquiring the digital signal of the visual instrument. The CMOS image sensor uses the photoelectric effect to convert photons into electrons, which are stored in the pixels of the photosensitive area. Subsequently, after charge transfer and ADC conversion, the electronic signal is converted into digital form, and finally a digital image that can be displayed or stored is generated. Considering portability, the two I / O serial ports can be used to transmit the signals collected by the CMOS image sensor to a computer for image processing, or to a user-defined display screen.

[0018] The external visual instrument can increase the eye distance through the telescope system designed by the present invention, and an additional semi-reflective and semi-transmissive mirror is added between the telescope systems to form a digital imaging system.

[0019] In view of the user's need for portability, the power supply system is composed of 18650 batteries connected in series, which provides power for the CMOS image sensor and the display screen according to the user's needs. If the user needs to connect an external computer through the I / O serial port, the corresponding power supply must be selected according to the user's own computer model for adaptation.

[0020] The method of using the device for external function expansion of visual instruments is as follows:

[0021] In the first step, in order to ensure that the visual instrument is stably and reliably fixed to the present invention, the user needs to use screws to tighten and fix it through the threaded knob slot. This step is simple to operate, and only needs to align the external visual instrument with the front end of the functional expansion optical system of the visual instrument (i.e., the attached Figure 1 Then turn the knob to clamp the external visual instrument.

[0022] The second step is to connect the function expansion optical system of the visual instrument to the display screen and the computer I / O serial port. To do this, the user needs to use a data cable to connect the three parts to each other. One end of the data cable is connected to the CMOS image sensor module, and the other end is connected to the display screen and the computer I / O serial port respectively. In this step, you need to make sure that the plug of the data cable matches the corresponding interface to avoid damaging the equipment.

[0023] The third step is to connect the power system to the image sensor module to power the entire image processing system. The power system uses 18650 battery packs connected in series. Users only need to connect one end of the power cord to the power interface of the image sensor module. At this point, the entire system can work normally.

[0024] In the fourth step, the real-time image can be viewed through the display screen and the image can be adjusted as needed. If the image needs to be processed, the image can be imported into the computer through the computer I / O serial port and processed using relevant software. In addition, the present invention can also connect other external devices through the serial port according to user needs.

[0025] Beneficial effects of the present invention:

[0026] (1) If a semi-reflective mirror is directly added on the basis of maintaining the original visual instrument, the interocular distance will become extremely narrow, almost making the semi-reflective mirror and the user's eyes overlap. To solve this problem, the present invention introduces a telescope system after the original visual instrument and places the semi-reflective mirror in the telescope system, so as not to hinder the user's interocular distance.

[0027] (2) Through the fourth semi-reflective and semi-transmissive mirror, the image of the external visual instrument can be reflected to the CMOS image sensor equipped by the present invention and then transmitted to the digital screen through the data line, thereby achieving the function of adding digital imaging without affecting the original user's eye distance.

[0028] (3) Since most digital instruments adopt parallel light emission design, the telescope system of the present invention has wide compatibility. As long as it is a visual instrument, it can be equipped with a corresponding visual instrument function expansion optical system to achieve the dual functions of visual and digital imaging.

[0029] (4) The overall length of the optical system described in the present invention is about 210 mm, thereby achieving portability and solving the problem that traditional high-integration instruments are difficult to carry due to their large size.

[0030] (5) The imaging lens F number of the system is 4.823. The distortion is less than 0.51%, and the field curvature is less than 0.25mm. The system has excellent performance.

[0031] (6) The semi-reflective and semi-transmissive film of the system can be freely selected according to user needs. Even if the light reflected by the semi-reflective and semi-transmissive film is weak, the color of the image on the CMOS image sensor can be enhanced with the help of computer algorithms. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the overall system structure

[0033] Figure 2 is the field curvature diagram of the imaging lens;

[0034] Figure 3 is the spot diagram of the imaging lens;

[0035] Figure 4 is the MTF diagram of the imaging lens;

[0036] Figure 5 is the light aberration curve of the imaging lens;

[0037] Figure 6 is the distortion curve of the imaging lens;

[0038] Figure 7 This is the OPD aberration curve of the imaging lens.

[0039] Figure 1 Marked as: first lens 1, second lens 2, third lens 3, fourth semi-reflective and semi-transmissive mirror 4, fifth lens 5, sixth lens 6, seventh lens 7, eighth lens 8, ninth lens 9, tenth lens 10, eleventh lens 11, twelfth lens 12, thirteenth lens 13, image processing system 14, mechanical packaging assembly 15, threaded knob slot 16. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] like Figure 1 As shown, the present invention provides an external function expansion device for a visual instrument, and the device includes: an optical system, a mechanical packaging component, an image processing system, and a power supply system.

[0042] The present invention proposes an external function expansion optical system for a visual instrument. The external function expansion optical system enables the visual instrument to have the diversified functions of both visual observation and digital imaging after being connected.

[0043] The optical system includes an objective lens group, an imaging lens group and an eyepiece group.

[0044] The objective lens group comprises: a first lens 1, a second lens 2, and a third lens 3.

[0045] The imaging lens group includes: a fourth semi-reflective and semi-transmissive mirror 4, a tenth lens 10, an eleventh lens 11, a twelfth lens 12, and a thirteenth lens 13.

[0046] The eyepiece assembly comprises: a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, and a ninth lens 9.

[0047] Along the optical axis from the object side to the semi-reflective and semi-transmissive mirror, the first lens 1, the second lens 2, the third lens 3, and the fourth semi-reflective and semi-transmissive mirror 4 are arranged in sequence; after being reflected by the fourth semi-reflective and semi-transmissive mirror 5, along the optical axis to the image plane, the tenth lens 10, the eleventh lens 11, the twelfth lens 12, and the thirteenth lens 13 are arranged in sequence; after being projected by the fourth semi-reflective and semi-transmissive mirror 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, and the ninth lens 9 are arranged along the optical axis;

[0048] The first lens 1 is a convex lens, the second lens 2 is a concave lens, the third lens 3 is a concave lens, the fourth semi-reflective mirror 4, the fifth lens 5 is a convex lens, the sixth lens 6 is a convex lens, the seventh lens 7 is a convex lens, the eighth lens 8 is a concave lens, the ninth lens 9 is a convex lens, the tenth lens 10 is a convex lens, the eleventh lens 11 is a concave lens, the twelfth lens 12 is a concave lens, and the thirteenth lens 13 is a convex lens.

[0049] The distance between the first lens sheet and the second lens sheet is 0mm; the distance between the second lens sheet and the third lens sheet is 71.4930mm; the distance between the third lens sheet and the semi-reflective and semi-transmissive mirror is 30mm; the distance between the semi-reflective and semi-transmissive mirror and the fifth lens sheet is 60mm; the distance between the fifth lens sheet and the sixth lens sheet is 0.2mm; the distance between the sixth lens sheet and the seventh lens sheet is 0.2mm; the distance between the seventh lens sheet and the eighth lens sheet is 0mm; the distance between the eighth lens sheet and the ninth lens sheet is 0mm; the distance between the semi-reflective and semi-transmissive mirror and the tenth lens sheet is 27.4622mm; the distance between the tenth lens sheet and the eleventh lens sheet is 0.2745mm; the distance between the eleventh lens sheet and the twelfth lens sheet is 0mm; the distance between the twelfth lens sheet and the thirteenth lens sheet is 0mm;

[0050] The object side curvature radius R1 of the first lens 1 and the image side curvature radius R2 of the first lens 1 satisfy the following relationship: (R1+R2) / (R1-R2)=0.23; the object side curvature radius R3 of the second lens 2 and the image side curvature radius R4 of the second lens 2 satisfy the following relationship: (R3+R4) / (R3-R4)=-1.9; the object side curvature radius R5 of the third lens 3 and the image side curvature radius R6 of the third lens 3 satisfy the following relationship: (R5+R6) / (R5-R6)=16.5; the fourth element is a semi-reflective and semi-transmissive mirror with a reflectivity of 0.3, transmittance is 0.7; the object side surface curvature radius R9 of the fifth lens 5, the image side surface curvature radius R10 of the fifth lens 5, satisfy the following relationship: (R9+R10) / (R9-R10)=1; the object side surface curvature radius R11 of the sixth lens 6, the image side surface curvature radius R12 of the sixth lens 6, satisfy the following relationship: (R11+R12) / (R11-R12)=0; the object side surface curvature radius R13 of the seventh lens 7, the image side surface curvature radius R14 of the seventh lens 7, satisfy the following relationship: (R13+R14) / (R13-R14)=0; The object side surface curvature radius R15 of the eighth lens 8 and the image side surface curvature radius R16 of the eighth lens 8 satisfy the following relationship: (R15+R16) / (R15-R16)=0.17; the object side surface curvature radius R17 of the ninth lens 9 and the image side surface curvature radius R18 of the ninth lens 9 satisfy the following relationship: (R17+R18) / (R17-R18)=1; the object side surface curvature radius R19 of the tenth lens 10 and the image side surface curvature radius R20 of the tenth lens 10 satisfy the following relationship: (R19+R20) / (R19-R20)=-0.15; The object side surface curvature radius R21 of the first lens 11 and the image side surface curvature radius R22 of the eleventh lens 11 satisfy the following relationship: (R21+R22) / (R21-R22)=2; the object side surface curvature radius R23 of the twelfth lens 12 and the image side surface curvature radius R24 of the twelfth lens 12 satisfy the following relationship: (R23+R24) / (R23-R24)=0.29; the object side surface curvature radius R25 of the thirteenth lens 13 and the image side surface curvature radius R26 of the thirteenth lens 13 satisfy the following relationship: (R25+R26) / (R25-R26)=-1;

[0051] The focal length of the objective lens group is fobject=157mm; the focal length of the eyepiece group is feye=21mm; the focal length of the first lens 1 is f1=505.56mm; the focal length of the second lens 2 is f2=704.06mm; the focal length of the third lens 3 is f3=2911.86mm; the reflectivity of the fourth semi-transparent and semi-reflective mirror 4 is R=0.3; the transmittance is 0.7; the focal length of the fifth lens 5 is f5=45.69mm; the focal length of the sixth lens 6 is f6=47.00m m; the focal length of the seventh lens 7 is f7=168.57mm; the focal length of the eighth lens 8 is f8=-64.73mm; the focal length of the ninth lens 9 is f9=-98.43mm; the focal length of the tenth lens 10 is f10=34.56mm; the focal length of the eleventh lens 11 is f11=-87.61mm; the focal length of the twelfth lens 12 is f12=-165.78mm; the focal length of the thirteenth lens 13 is f13=-6765.94mm;

[0052] The center thickness of each lens is as follows: the center thickness of the lens of the first lens 1 is D1=6.5mm; the center thickness of the lens of the second lens 2 is D2=5.245mm; the center thickness of the lens of the third lens 3 is D3=5mm; the thickness of the fourth semi-reflective semi-transmissive mirror 4 is D4=27.4662mm; the center thickness of the lens of the fifth lens 5 is D5=7mm; the center thickness of the lens of the sixth lens 6 is D6=5.5mm; the center thickness of the lens of the seventh lens 7 is D7=7mm; the center thickness of the lens of the eighth lens 8 is D8=1.8mm; the center thickness of the lens of the ninth lens 9 is D9=5mm; the center thickness of the lens of the tenth lens 10 is D10=6.02mm; the center thickness of the lens of the eleventh lens 11 is D11=3.65mm; the center thickness of the lens of the twelfth lens 12 is D12=2.93mm; the center thickness of the lens of the thirteenth lens 13 is D13=3mm.

[0053] The refractive index and Abbe number of each lens are as follows: the refractive index N1 of the first lens 1 is 1.5168, and the Abbe number V1 is 64.2; the refractive index N2 of the second lens 2 is 1.6284, and the Abbe number V2 is 35.9; the refractive index N3 of the third lens 3 is 1.6826, and the Abbe number V3 is 32; the reflectivity R of the fourth semi-reflective semi-transmissive mirror 4 is 0.3, and the transmittance T is 0.7; the refractive index N5 of the fifth lens 5 is 1.5524, and the Abbe number V5 is 63.3; the refractive index N6 of the sixth lens 6 is 1.5524, and the Abbe number V6 is 63.3; the refractive index N7 of the seventh lens 7 is 1.4 874, Abbe number V7=70.4; the refractive index N8 of the eighth lens 8=1.7285, Abbe number V8=28.3; the refractive index N9 of the ninth lens 9=1.4874, Abbe number V9=70.4; the refractive index N10 of the tenth lens 10=1.4874, Abbe number V10=70.4; the refractive index N11 of the eleventh lens 11=1.5244, Abbe number V11=59.2; the refractive index N12 of the twelfth lens 12=1.8222, Abbe number V12=37.4; the refractive index N13 of the thirteenth lens 13=1.82, Abbe number V13=37.4;

[0054] The specific parameters of the external function expansion optical system of the visual instrument are shown in Table 1:

[0055] Table 1

[0056]

[0057]

[0058] Note: Attached Figure 1 The left side is the object plane and the right side is the image plane

[0059] In the attached figure Figures 2 to 7 The imaging performance of the external function expansion optical system of the visual instrument is given. It can be seen from the figure that the imaging quality of the external function expansion optical system of the visual instrument is excellent and fully meets practical needs.

[0060] Furthermore, in the imaging lens group, the transmittance of the semi-reflective and semi-transmissive mirror can be adjusted independently according to user needs, and the optimal transmittance should be maintained between 0.5 and 0.7.

[0061] The mechanical packaging assembly uses 6063 aluminum alloy as the packaging shell. Figure 1 As shown, 6063 aluminum alloy spacers are used to determine the relative position of each lens. The relative positions of the lenses are as follows:

[0062] The two ends of the lens barrel are fixed with optical glue, so as to ensure that the optical components in the function expansion optical system of the visual instrument are firmly fixed inside the lens barrel. The external visual instrument is connected to the function expansion optical system of the visual instrument through the threaded knob slot, so as to ensure the stability of the connection between the entire invention instrument and the external visual instrument.

[0063] The image processing system is equipped with a CMOS image sensor and two I / O serial ports. Considering portability, the two I / O serial ports can be used to transmit the signals collected by the CMOS image sensor to a computer for image processing, and can also transmit the signals collected by the I / O sensor to a user-defined display screen.

[0064] In view of the user's need for portability, the power supply system is composed of 18650 batteries connected in series, which provides power for the CMOS image sensor and the display screen according to the user's needs. If the user needs to connect an external computer through the I / O serial port, the corresponding power supply must be selected according to the user's own computer model for adaptation.

[0065] The method of using the external function expansion optical system for visual instruments is as follows:

[0066] In the first step, in order to ensure that the visual instrument is stably and reliably fixed to the present invention, the user needs to use screws to tighten and fix it through the threaded knob slot. This step is simple to operate, and only needs to align the external visual instrument with the front end of the functional expansion optical system of the visual instrument (i.e., the attached Figure 1 Then turn the knob to clamp the external visual instrument.

[0067] In the second step, users need to connect the image sensor to the display screen and the computer I / O serial port. To do this, users need to use a data cable to connect the three parts to each other. One end of the data cable is connected to the CMOS image sensor module, and the other end is connected to the display screen and the computer I / O serial port respectively. In this step, you need to make sure that the plug of the data cable matches the corresponding interface to avoid damaging the device.

[0068] The third step is to connect the power system to the image sensor module to power the entire image processing system. The power system uses 18650 battery packs connected in series. Users only need to connect one end of the power cord to the power interface of the image sensor module. At this point, the entire system can work normally.

[0069] In the fourth step, the real-time image can be viewed through the display screen and the image can be adjusted as needed. If the image needs to be processed, the image can be imported into the computer through the computer I / O serial port and processed using relevant software. In addition, the present invention can also connect other external devices through the serial port according to user needs.

[0070] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent methods or changes that do not deviate from the technical creation of the present invention should be included in the scope of protection of the present invention.

Claims

1. A system for external function expansion of a visual instrument, characterized in that: include: A first lens (1), a second lens (2), a third lens (3), and a fourth semi-reflective semi-transmissive mirror (4) are arranged in sequence along the optical axis from the object side to the semi-reflective semi-transmissive mirror; after being reflected by the fourth semi-reflective semi-transmissive mirror (4), a tenth lens (10), an eleventh lens (11), a twelfth lens (12), and a thirteenth lens (13) are arranged in sequence along the optical axis to the image plane; after being projected by the fourth semi-reflective semi-transmissive mirror (4), a fifth lens (5), a sixth lens (6), a seventh lens (7), an eighth lens (8), and a ninth lens (9) are arranged in sequence along the optical axis; The first lens (1) is a convex lens, the second lens (2) is a concave lens, the third lens (3) is a concave lens, the fourth semi-reflective semi-transmissive mirror (4), the fifth lens (5) is a convex lens, the sixth lens (6) is a convex lens, the seventh lens (7) is a convex lens, the eighth lens (8) is a concave lens, the ninth lens (9) is a convex lens, the tenth lens (10) is a convex lens, the eleventh lens (11) is a concave lens, the twelfth lens (12) is a concave lens, and the thirteenth lens (13) is a convex lens; The object side curvature radius R1 of the first lens (1) and the image side curvature radius R2 of the first lens (1) satisfy the following relationship: (R1+R2) / (R1-R2)=0.23; the object side curvature radius R3 of the second lens (2) and the image side curvature radius R4 of the second lens (2) satisfy the following relationship: (R3+R4) / (R3-R4)=-1.9; the object side curvature radius R5 of the third lens (3) and the image side curvature radius R6 of the third lens (3) satisfy the following relationship: (R5+R6) / (R5-R6)=16.5; the object side curvature radius R1 of the fifth lens (5) and the image side curvature radius R2 of the fifth lens (5 ... The surface curvature radius R9 and the image side surface curvature radius R10 of the fifth lens (5) satisfy the following relationship: (R9+R10) / (R9-R10)=1; the object side surface curvature radius R11 of the sixth lens (6) and the image side surface curvature radius R12 of the sixth lens (6) satisfy the following relationship: (R11+R12) / (R11-R12)=0; the object side surface curvature radius R13 of the seventh lens (7) and the image side surface curvature radius R14 of the seventh lens (7) satisfy the following relationship: (R13+R14) / (R13-R14)=0; the object side surface curvature radius R14 of the eighth lens (8) satisfies the following relationship: (R13+R14) / (R13-R14)=0; the object side surface curvature radius R15 of the eighth lens (8) satisfies the following relationship: (R13+R14) / (R13-R14)=0. 15, the image side surface curvature radius R16 of the eighth lens (8) satisfies the following relationship: (R15+R16) / (R15-R16)=0.17; the object side surface curvature radius R17 of the ninth lens (9) and the image side surface curvature radius R18 of the ninth lens (9) satisfy the following relationship: (R17+R18) / (R17-R18)=1; the object side surface curvature radius R19 of the tenth lens (10) and the image side surface curvature radius R20 of the tenth lens (10) satisfy the following relationship: (R19+R20) / (R19-R20)=-0.15; the eleventh lens (11) The object side surface curvature radius R21 and the image side surface curvature radius R22 of the eleventh lens (11) satisfy the following relationship: (R21+R22) / (R21-R22)=2; the object side surface curvature radius R23 of the twelfth lens (12) and the image side surface curvature radius R24 of the twelfth lens (12) satisfy the following relationship: (R23+R24) / (R23-R24)=0.29; the object side surface curvature radius R25 of the thirteenth lens (13) and the image side surface curvature radius R26 of the thirteenth lens (13) satisfy the following relationship: (R25+R26) / (R25-R26)=-1.

2. A system for external function expansion of a visual instrument according to claim 1, characterized in that: The focal length of each lens is: the focal length of the objective lens module is f 物 =157mm; the focal length of the eyepiece module is f 目 =21mm; the focal length of the first lens (1) is f1=505.56mm; the focal length of the second lens (2) is f2=704.06mm; the focal length of the third lens (3) is f3=2911.86mm; the focal length of the fifth lens (5) is f5=45.69mm; the focal length of the sixth lens (6) is f6=47.00mm; the focal length of the seventh lens (7) is f7=168.57mm; The focal length of the eighth lens (8) is f8=-64.73 mm; the focal length of the ninth lens (9) is f9=-98.43 mm; the focal length of the tenth lens (10) is f10=34.56 mm; the focal length of the eleventh lens (11) is f11=-87.61 mm; the focal length of the twelfth lens (12) is f12=-165.78 mm; and the focal length of the thirteenth lens (13) is f13=-6765.94 mm.

3. A system for external function expansion of a visual instrument according to claim 1, characterized in that: The thickness of each lens is as follows: the center thickness of the lens of the first lens (1) is D1=6.5mm; the center thickness of the lens of the second lens (2) is D2=5.245mm; the center thickness of the lens of the third lens (3) is D3=5mm; the thickness of the fourth semi-reflective semi-transmissive mirror (4) is D4=27.4662mm; the center thickness of the lens of the fifth lens (5) is D5=7mm; the center thickness of the lens of the sixth lens (6) is D6=5.5mm; the center thickness of the lens of the seventh lens (7) is D7=5.6mm; the center thickness of the lens of the seventh lens (7) is D8=6.8mm; the center thickness of the lens of the seventh lens (7) is D9=7.8mm; the center thickness of the lens of the seventh lens (7) is D1=6.5mm; the center thickness of the lens of the seventh lens (7) is D2=5.245mm; the center thickness of the lens of the third lens (3) is D3=5mm; the center thickness of the lens of the fourth semi-reflective semi-transmissive mirror (4) is D4=27.4662mm; the center thickness of the lens of the fifth lens (5) is D5=7mm; the center thickness of the lens of the sixth lens (6) is D6=5.5mm; the center thickness of the lens of the seventh lens (7) is D8=6.8mm. The center thickness of the eighth lens (8) is D7=7mm; the center thickness of the lens of the eighth lens (8) is D8=1.8mm; the center thickness of the lens of the ninth lens (9) is D9=5mm; the center thickness of the lens of the tenth lens (10) is D10=6.02mm; the center thickness of the lens of the eleventh lens (11) is D11=3.65mm; the center thickness of the lens of the twelfth lens (12) is D12=2.93mm; the center thickness of the lens of the thirteenth lens (13) is D13=3mm.

4. A system for external function expansion of a visual instrument according to claim 1, characterized in that: The refractive index and Abbe number of each lens are as follows: the refractive index N1 of the first lens (1) is 1.5168, and the Abbe number V1 is 64.2; the refractive index N2 of the second lens (2) is 1.6284, and the Abbe number V2 is 35.9; the refractive index N3 of the third lens (3) is 1.6826, and the Abbe number V3 is 32; the refractive index N5 of the fifth lens (5) is 1.5524, and the Abbe number V5 is 63.3; the refractive index N6 of the sixth lens (6) is 1.5524, and the Abbe number V6 is 63.3; the refractive index N7 of the seventh lens (7) is 1.4874, and the Abbe number V7 is 70.4; The refractive index N8 of the eighth lens (8) is 1.7285, and the Abbe number V8 is 28.3; the refractive index N9 of the ninth lens (9) is 1.4874, and the Abbe number V9 is 70.4; the refractive index N10 of the tenth lens (10) is 1.4874, and the Abbe number V10 is 70.4; the refractive index N11 of the eleventh lens (11) is 1.5244, and the Abbe number V11 is 59.2; the refractive index N12 of the twelfth lens (12) is 1.8222, and the Abbe number V12 is 37.4; the refractive index N13 of the thirteenth lens (13) is 1.82, and the Abbe number V13 is 37.

4.

5. The system for external function expansion of a visual instrument according to claim 1, characterized in that: The reflectivity and transmittance of the fourth semi-reflective and semi-transmissive mirror (4) can be determined according to actual needs, so that the combined reflectivity and transmittance of the lens is 1, and the transmittance is between 0.5 and 0.

7.

6. A system for external function expansion of a visual instrument according to claim 1, characterized in that: The total optical length of the optical system lens module is 200 mm <T<250mm。 7. A device for external function expansion of a visual instrument, characterized in that: The invention comprises the optical system as claimed in any one of claims 1 to 6, a mechanical packaging component (15), and an image processing system (14); the optical system is placed inside the mechanical packaging component (15), and the image processing system (14) is used to sense the optical signal information of the optical system and can transmit the sensed information to an external device through an I / O port.

8. The device for external function expansion of a visual instrument according to claim 7, characterized in that: The mechanical packaging component (15) uses metal as the lens barrel packaging shell, and uses a metal spacer inside to fix the relative position of each lens. The two ends of the lens barrel are fixed with optical glue. The distance between the first lens piece (1) and the second lens piece (2) is 0 mm; the distance between the second lens piece (2) and the third lens piece (3) is 71.4930 mm; the distance between the third lens piece (3) and the fourth semi-reflective semi-transmissive mirror (4) is 30 mm; the distance between the fourth semi-reflective semi-transmissive mirror (4) and the fifth lens piece (5) is 60 mm; the distance between the fifth lens piece (5) and the sixth lens piece (6) is 0.2 mm; the distance between the sixth lens piece (6) and the fifth lens piece (5) is 0.2 mm. The distance between the lens sheet (6) and the seventh lens sheet (7) is 0.2 mm; the distance between the seventh lens sheet (7) and the eighth lens sheet (8) is 0 mm; the distance between the eighth lens sheet (8) and the ninth lens sheet (9) is 0 mm; the distance between the fourth semi-reflective semi-transmissive mirror (4) and the tenth lens sheet (10) is 27.4622 mm; the distance between the tenth lens sheet (10) and the eleventh lens sheet (11) is 0.2745 mm; the distance between the eleventh lens sheet (11) and the twelfth lens sheet (12) is 0 mm; the distance between the twelfth lens sheet (12) and the thirteenth lens sheet (13) is 0 mm.

9. A method for using a device for external function expansion of a visual instrument according to claim 7 or 8, characterized in that: These include: S1, using a bolt to tighten and fix through the threaded knob slot (16), aligning the external visual instrument with the front end of the functional expansion optical system of the visual instrument, and then turning the bolt to clamp the external visual instrument; S2, connecting the function expansion optical system of the visual instrument with external devices such as a display screen and a computer I / O serial port; using a data cable to connect the various parts, one end of the data cable is connected to the CMOS image sensor module of the image processing system, and the other end is connected to the display screen and the computer I / O serial port respectively; S3, connecting the power supply to the image processing module to supply power to the entire image processing system; S4, watch the real-time image through the display screen and adjust the image as needed. If the image needs to be processed, the image can be imported into the computer through the computer I / O serial port and processed using relevant software; other external devices can also be connected through the interface according to user needs.

Images