A focusing system and debugging system for converged optical paths

Abstract

This invention discloses a focusing system and adjustment system for a converging optical path, belonging to the field of broadband optical technology. It includes: a first plane mirror that reflects outgoing light from a reflecting optical path to generate a first reflected light; a second plane mirror that reflects the first reflected light to generate a second reflected light; an ellipsoidal mirror that reflects the second reflected light to generate a converging spot; a first parabolic mirror with a test object placed at the midpoint between the first parabolic mirror and the ellipsoidal mirror, the converging spot generating a third reflected light after passing through the test object; and a second parabolic mirror that reflects the third reflected light and outputs a fourth reflected light to a receiving optical path. The advantages of this technical solution are: the converging point is measured outside the device in a very small space, and the light spot is reduced by utilizing the reflection of the optical path; it can be applied to a broadband optical path; it is simple to assemble and adjust; and it does not require changes to the optical path structure.

Description

Technical Field

[0001] This invention relates to the field of broadband optical technology, and in particular to a focusing system and adjustment system for use in converging optical paths. Background Technology

[0002] Optical path designs are mostly transmission, reflection, or transmissive-reflective. Transmission optical paths use lenses with high transmittance for the applied wavelength, while reflection optical paths use mirrors. Depending on the type of the reflecting surface, they are classified as plane mirrors, parabolic mirrors, ellipsoidal mirrors, etc., and depending on the material of the reflecting surface, they are classified as aluminum-coated, silver-coated, and gold-coated, etc. Transmissive-reflective optical paths use both lenses and mirrors. Depending on the light source and application, apertures, polarizers, waveplates, and prisms may also be placed in the optical path.

[0003] In the prior art, the transmissive optical path is small in size and simple to assemble and adjust, while the reflective optical element in the reflective optical path is coated with a metal film, which makes it have high reflectivity over the widest spectral range. However, the transmissive optical path is difficult to achieve high transmittance over a wide spectrum, and the reflective optical path is larger in size and has a complex design for the converging optical path. Summary of the Invention

[0004] The purpose of this invention is to provide a focusing system for converging optical paths, thereby solving the above-mentioned technical problems;

[0005] The present invention also aims to provide a debugging system for a focusing system applied to a converging optical path, thereby solving the above-mentioned technical problems;

[0006] The technical problem solved by this invention can be achieved by the following technical solutions:

[0007] A focusing system for use in a converging optical path includes,

[0008] The first plane mirror reflects the outgoing light from a reflected light path to produce the first reflected light.

[0009] The second plane mirror reflects the first reflected light to produce a second reflected light;

[0010] An ellipsoidal mirror reflects the second reflected light to produce a converging spot.

[0011] A first parabolic mirror, with the object to be measured placed at the midpoint between the first parabolic mirror and the ellipsoidal reflector, and the converging light spot generating a third reflected light after passing through the object to be measured;

[0012] A second parabolic mirror reflects the third reflected light and outputs a fourth reflected light to a receiving optical path.

[0013] Preferably, the reflective surface of the first planar reflector has a size of 30mm*30mm.

[0014] Preferably, the reflective surface of the second planar reflector has a size of 40mm*40mm.

[0015] Preferably, the focal length of the first parabolic mirror is 25.4 mm.

[0016] Preferably, the focal length of the second parabolic mirror is 127mm.

[0017] Preferably, the light-transmitting aperture of the first parabolic mirror and the second parabolic mirror is 25.4 mm.

[0018] A debugging system for a focusing system applied to a converging optical path, the system comprising:

[0019] A plane mirror assembly is adjustablely positioned between the emitting optical path and the receiving optical path to reflect the outgoing light from the reflecting optical path.

[0020] An observation screen is adjustablely positioned at a first distance from the planar mirror group, and a light spot is projected onto the observation screen;

[0021] An image acquisition and processing device is used to capture the light spot on the observation screen;

[0022] A signal processing device, connected to the image acquisition and processing device, determines the beam divergence angle based on the size of the light spot, and determines the convergence point based on the beam divergence angle.

[0023] Preferably, the planar reflector assembly includes a third planar reflector and a first adjustment bracket for holding the third planar reflector, the first adjustment bracket being located on a guide rail.

[0024] Preferably, the guide rail is provided with a second adjustment bracket for holding the observation screen.

[0025] Preferably, the image acquisition and processing device is also provided on the guide rail.

[0026] The beneficial effects of the present invention are as follows: by adopting the above technical solutions, the present invention provides a focusing system and debugging system for converging optical paths, which measures the convergence point outside the device with a very small space, and then uses the reflection of the optical path to reduce the light spot. It can be applied to a wide spectrum, is simple to install and adjust, and does not require changes to the optical path structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention, showing a convergent optical path debugging system applied to a wide spectrum.

[0028] Figure 2This is a preferred embodiment of the present invention, showing a specific schematic diagram of a convergent optical path debugging system applied to a wide spectrum;

[0029] Figure 3 This is a schematic diagram of a housing for a broadband convergent optical path system, which is a preferred embodiment of the present invention.

[0030] Figure 4 This is a preferred embodiment of the present invention, showing a schematic diagram of the application of a focusing system in a wide-spectrum convergent optical path system within a housing;

[0031] Figure 5 This is a schematic diagram of the structure of a focusing system applied to a broadband convergent optical path system, which is a preferred embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of a focusing system applied to a broadband convergent optical path system, which is a preferred embodiment of the present invention.

[0033] In the attached diagram: 1. Box body; 11. Focusing system; 12. Converging beam; 13. First plane mirror; 14. Second plane mirror; 15. Ellipsoidal mirror; 16. First parabolic mirror; 17. Second parabolic mirror; 18. Receiving optical path; 2. Outlet; 3. Receiver; 4. Adjustment system; 5. Third plane mirror; 6. Observation screen; 7. First adjustment frame; 8. Second adjustment frame; 9. Guide rail; 10. Image acquisition and processing device. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0037] A focusing system 11 applied to a converging optical path, such as Figure 4 , Figure 5 , Figure 6 As shown, including,

[0038] The first plane mirror 13 reflects the outgoing light from a reflected light path to generate the first reflected light.

[0039] The second plane mirror 14 reflects the first reflected light to produce a second reflected light;

[0040] An ellipsoidal reflector 15 reflects the second reflected light to produce a converging spot.

[0041] A first parabolic mirror 16 is used, and the object to be measured is placed at the midpoint between the first parabolic mirror 16 and the ellipsoidal reflector 15. The converging light spot generates a third reflected light after passing through the object to be measured.

[0042] A second parabolic mirror 17 reflects the third reflected light and outputs the fourth reflected light to a receiving optical path 18.

[0043] Specifically, the present invention provides a focusing system 11 for use in a convergent optical path, which is mainly used in a broadband optical path. It obtains a convergent light spot outside the device with a very small space through an ellipsoidal reflector 15, which compresses the light spot and is easy to operate and adjust.

[0044] In a preferred embodiment, the first plane mirror 13 has a reflective surface size of 30mm*30mm, the second plane mirror 14 has a reflective surface size of 40mm*40mm, the first parabolic mirror 16 has a focal length of 25.4mm, the second parabolic mirror 17 has a focal length of 127mm, and the light-transmitting aperture of the first parabolic mirror 16 and the second parabolic mirror 17 is 25.4mm.

[0045] Specifically, since the distance between the output port 2 and the receiving port 3 is only 200mm, the light path needs to be turned and propagated along the vertical direction of the original light path. Due to space constraints, the first parabolic mirror 16 is selected as short focal length and the second parabolic mirror 17 is selected as long focal length.

[0046] Furthermore, this invention can cover the entire ultraviolet, visible, and near-infrared bands from 175nm to 3300nm, with a transmittance of up to 90%. It can compress the original rectangular light spot of the device, which is 10mm long and 2mm wide, into a rectangular light spot of 4mm long and 1mm wide. After reflection by the aforementioned optical elements, the optical axis can be made perpendicular to the original optical axis, thus achieving light spot compression without changing the internal optical path structure of the device. The internal optical elements are simple and do not require complex optical design; standard parts can be used directly to meet the usage requirements.

[0047] A debugging system 4 for a focusing system 11 applied to a converging optical path, such as... Figure 1 , Figure 2 As shown, it includes:

[0048] A plane mirror assembly is adjustablely positioned between the emitting optical path and the receiving optical path 18 to reflect the outgoing light from the reflecting optical path.

[0049] The observation screen 6 is adjustable and set at a first distance from the plane mirror group, and a light spot is projected on the observation screen 6;

[0050] Image acquisition and processing device 10 is used to capture light spots on the observation screen;

[0051] The signal processing device is connected to the image acquisition and processing device 10, which determines the beam divergence angle based on the size of the light spot, and determines the convergence point based on the beam divergence angle.

[0052] Specifically, the image acquisition and processing device 10 is a camera, and the observation screen 6 is made of sulfuric acid paper, which is a semi-transparent medium. The divergence angle of the beam is measured outside the device in a very small space through the debugging system 4, providing light source parameters for optical path design. It is easy to operate and simple to assemble and adjust.

[0053] In a preferred embodiment, the planar reflector assembly includes a third planar reflector 5 and a first adjustment frame 7 for holding the third planar reflector 5. The first adjustment frame 7 is located on a guide rail 9, and a second adjustment frame 8 for holding the observation screen 6 is provided on the guide rail 9. An image acquisition and processing device 10 is also provided on the guide rail 9.

[0054] Specifically, the third plane reflector 5 is fixed by adjusting the first adjustment frame 7. The third plane reflector 5 is adjusted so that the emitted light from the device is turned 90 degrees after passing through the reflector and then shines on the observation screen 6. The guide rail 9 is graduated, which facilitates accurate positioning and reading of position data.

[0055] Furthermore, the position of the fixed plane mirror 5 on the guide rail 9 is recorded as point N0, the position of the fixed camera on the guide rail 9 is recorded as point M0, and the position of the observation screen 6 on the guide rail 9 when the light spot size on the observation screen 6 is the smallest is recorded as point O. Based on the principle that light travels in a straight line, the divergence angle of the light beam between points N0 and O on the guide rail 9, as well as the divergence angle of the light beam between points O and M0 on the guide rail 9, are obtained.

[0056] Furthermore, N1 and N2 are selected sequentially between points N0 and O on guide rail 9. The diagonal lengths of the rectangular light spots at positions N1 and N2 are measured by the camera as a1 and a2, respectively, and the divergence angle of the light beam is obtained as follows:

[0057]

[0058] At this point, a1 > a2, α is negative, and the beam converges;

[0059] Select points M1 and M2 sequentially between points O and M0 on guide rail 9. Measure the diagonal lengths of the rectangular light spots at positions M1 and M2 using a camera, obtaining b1 and b2 respectively. The divergence angle of the light beam is then calculated as follows:

[0060]

[0061] At this time, b1 < b2, β is a positive value, and the light beam diverges;

[0062] More specifically, in order to improve the accuracy of the measurement results, between the N0 point and the O point of the guide rail 9, n positions N1 to N are sequentially and equally spacedly selected , ,

[0069] ,

[0068] ,

[0071] ,

[0070] , Figure 3 , , , and the diagonal lengths of the rectangular light spots corresponding to N1 to N on the observation screen 6 are measured by the camera as a1 to a n in sequence, the angular values determined by each two points are calculated respectively, and finally their average value is taken to obtain: n

[0063]

[0064]

[0065] Similarly, between the O point and the M0 point of the guide rail 9, m positions M1 to M are sequentially and equally spacedly selected m , and the diagonal lengths of the rectangular light spots corresponding to M1 to M on the observation screen 6 are measured by the camera as b1 to b m in sequence, the angular values determined by each two points are calculated respectively, and finally their average value is taken to obtain: m

[0066] <00​​​​​​​​​​​​​​In summary, this application provides a focusing system and debugging system for convergent optical paths. The beam divergence angle is measured outside the device in a very small space, providing light source parameters for optical path design. It is directly integrated with the device, and the beam spot can be compressed without changing the optical path structure or referring to the optical component parameters inside the device, so as to achieve the effect of low loss coverage of the entire optical band.

[0072] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A focusing system applied to a converging optical path, characterized in that, include, The first plane mirror reflects the outgoing light from a reflected light path to produce the first reflected light. The second plane mirror reflects the first reflected light to produce a second reflected light; An ellipsoidal mirror reflects the second reflected light to produce a converging spot. A first parabolic mirror is provided, and the object to be measured is placed at the midpoint between the first parabolic mirror and the ellipsoidal reflector. The converging light spot generates a third reflected light after passing through the object to be measured. The first parabolic mirror is a short focal length mirror with a focal length of 25.4 mm. A second parabolic mirror reflects the third reflected light and outputs a fourth reflected light to a receiving optical path. The second parabolic mirror is a telephoto lens with a focal length of 127mm.

2. The focusing system applied to a converging optical path according to claim 1, characterized in that, The reflective surface of the first planar reflector has dimensions of 30mm*30mm.

3. The focusing system applied to a converging optical path according to claim 1, characterized in that, The reflective surface of the second planar reflector has dimensions of 40mm*40mm.

4. The focusing system applied to a converging optical path according to claim 1, characterized in that, The light-transmitting aperture of the first parabolic mirror and the second parabolic mirror is 25.4 mm.

5. A debugging system for a focusing system applied to a converging optical path, characterized in that, Applied to the focusing system according to any one of claims 1-4, comprising: A plane mirror assembly is adjustablely positioned between the emitting optical path and the receiving optical path to reflect the outgoing light from the reflecting optical path. An observation screen is adjustablely positioned at a first distance from the planar mirror group, and a light spot is projected onto the observation screen; An image acquisition and processing device is used to capture the light spot on the observation screen; The signal processing device is connected to the image acquisition and processing device, and determines the signal based on the size of the light spot. Determine the beam divergence angle and, based on the beam divergence angle, determine the convergence point.

6. The debugging system for a focusing system applied to a converging optical path according to claim 5, characterized in that, The planar mirror assembly includes a third planar mirror and a first adjustment bracket for holding the third planar mirror, the first adjustment bracket being located on a guide rail.

7. The debugging system for a focusing system applied to a converging optical path according to claim 6, characterized in that, The guide rail is provided with a second adjustment bracket for holding the observation screen.

8. The debugging system for a focusing system applied to a converging optical path according to claim 7, characterized in that, The image acquisition and processing device is also provided on the guide rail.

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