TWI812262B - Detection device and method for detecting focal length of hyperboloid mirror - Google Patents

Abstract

The invention includes a machine part, a main light source part, a parabolic mirror part, a screen part, a double-curved mirror part and a control part. Then, the preparation steps, the steps of detecting the focus of the parabolic mirror, the steps of adjusting the vertex of the hyperbolic mirror, the steps of adjusting the angle of the hyperbolic mirror, and the steps of detecting the focal length of the hyperbolic mirror are performed in sequence. Finally, the focal length of the hyperbolic mirror is detected; this case has the advantages of being able to quickly detect the focal length of the hyperbolic mirror, quickly obtaining other parameters of the hyperbolic mirror, and the overall device and detection method are relatively simple.

Description

Detection device and detection method for focal length of hyperboloid mirror

The present invention relates to a device for detecting the focal length of a hyperboloid mirror and a detection method thereof. In particular, it relates to a device that can quickly detect the focal length of a hyperboloid mirror and can quickly obtain other parameters of the hyperboloid mirror, and the overall device and detection method are relatively simple. A detection device for the focal length of a hyperboloid mirror and its detection method.

。 Refer to Figure 13, which is an introduction to the important characteristics and parameters of a hyperbola. A hyperbola is two symmetrical curves with two focus points (F), one of which is from the origin (0,0) The distance between the positions is the focal length (f), that is, the distance between the two focal points (F) is twice the focal length (f). There is an imaginary rectangle between the two symmetrical curves, the long side of which is twice the major axis (a), and the short side of which is twice the minor axis (b). Once the major axis (a) and minor axis (b) are known, other parameters can be quickly calculated, such as: vertex radius r=b ² /a; conic constant k=-(a ² +b ² )/a ² =-(1+tan ² θ); asymptote angle

.

However, a hyperboloid mirror is a solid structure with hyperbolic characteristics on the mirror surface. Since the focus of such a hyperboloid mirror is not only off-axis, it is also difficult to directly detect it with a single light beam or optical element, let alone the measurement of other parameters.

Regarding related prior technologies, for example, Chinese Invention Patent No. CN100541114, "Multi-dimensional Full-field Optical Verification Device for Hyperboloid Reflectors", although it is related to the calibration technology of hyperboloid reflectors, it can only measure the surface morphology and reflectivity at best. Parameter measurement cannot quickly measure focal length and related parameters.

In view of this, it is necessary to develop technology that can solve the above conventional shortcomings.

The purpose of the present invention is to provide a detection device for the focal length of a hyperboloid mirror and a detection method thereof, which can quickly detect the focal length of the hyperboloid mirror and quickly obtain other parameters of the hyperboloid mirror, and the overall device is relatively consistent with the detection method. Simplicity and other advantages. In particular, the problem to be solved by the present invention is that the focus of the known hyperboloid mirror is not only off-axis, but also difficult to directly measure with a single beam or optical element, let alone the measurement of other parameters. Even though there is a relevant patent case (Chinese Invention Patent No. CN100541114 Multi-dimensional full-field optical inspection device for hyperboloid mirrors), it can only measure the surface topography and reflectivity parameters at best, and it is still impossible to quickly measure the focal length and Related parameters and other issues.

The technical means to solve the above problems is to provide a detection device and a detection method for the focal length of a hyperboloid mirror. The detection device includes: a machine part having a first end, a second end and a slide rail; The slide rail is provided on the machine part in a direction from the first end to the second end; a main light source part is provided on the slide rail and adjacent to the first end; the main light source part has A virtual optical axis and five parallel light emitters. The virtual optical axis is parallel to the slide rail. The five parallel light emitters are respectively used to emit a first light beam from the first end toward the second end. , a second beam, a third beam, a fourth beam and a fifth beam; the first beam is coaxial with the virtual optical axis, the second beam, the third beam, the fourth beam and the The five light beams are all parallel to the first light beam, and are distributed counterclockwise sequentially with the first light beam as the center; a parabolic mirror part is installed on the slide rail and is between the main light source part and the third light beam. Between the two ends; the parabolic mirror part has a parabolic mirror, and the parabolic mirror has a central hollowed area that is coaxial with the virtual optical axis; A screen part is used to be installed on the slide rail and can slide relatively. The screen part has a screen that is coaxial with the virtual optical axis; a double-curved mirror part is used to be installed on the slide rail. on, and can slide relatively, the hyperboloid mirror part is provided with a hyperboloid mirror, the hyperboloid mirror has a vertex, which is coaxial with the virtual optical axis; a pair of light source parts is used to be arranged on the slide rail on, and adjacent to the second end; and can slide relatively, the auxiliary light source part is used to emit a sixth light beam from the second end toward the first end, and the sixth light beam is aligned with the virtual optical axis coaxial; and a control part that electrically connects the main light source part, the parabolic mirror part, the screen part, the hyperboloid mirror part and the auxiliary light source part.

The part about the detection method includes the following steps: 1. Preparation steps; 2. Steps to detect the focus of the parabolic mirror; 3. Steps to adjust the vertex of the hyperbolic mirror; 4. Steps to adjust the angle of the hyperbolic mirror; and 5. Steps to detect the focal length of the hyperbolic mirror. .

The above objects and advantages of the present invention can be easily understood from the following detailed description of selected embodiments and the accompanying drawings.

The present invention is described in detail below with the following examples and drawings:

10: Machine Department

11:First end

12:Second end

13:Slide rail

20: Main light source part

21: Parallel light emitter

30: Parabolic mirror part

31:Parabolic mirror

311:Central Hollowed Area

40:Screen Department

41:Screen

50: Hyperboloid mirror part

51:Hyperboloid mirror

51A:Vertex

60: Sub-light source part

70:Control Department

L: virtual optical axis

L1: first beam

L2: Second beam

L3: The third beam

L4: The fourth beam

L5: The fifth beam

L6: The sixth beam

C1: first focus position

C1': the first unfocused position

C1”: The second unfocused position

C2: Correct position

C3: Angle confirmation position

C4: Vertex focus position

C4': Vertex unfocused position

C5: Second focus position

C5': unfocused position

F1: parabolic mirror focus

F2: hyperboloid mirror focus

M1: Main light source sliding seat

M2: Parabolic mirror slide seat

M3:Screen slide

M4: Hyperboloid mirror slide

M5: Auxiliary light source slide

S1: Preparatory steps

S2: Steps to detect the focus of parabolic mirror

S3: Steps to adjust the vertices of the hyperbolic mirror

S4: Steps to adjust the angle of the hyperboloid mirror

S5: Steps to detect the focal length of hyperboloid mirror

(a): long axis

(b):Short axis

(f):Focal length

Figure 1 is a schematic diagram of the present invention.

Figure 2 is a cross-sectional view of the II-II position of Figure 1.

Figure 3 is a cross-sectional view of the III-III position in Figure 1.

Figure 4 is a schematic diagram of one of the detection methods of the present invention (using the screen to detect the focus of the parabolic mirror).

Figures 5A, 5B and 5C are schematic diagrams of the screen in Figure 4 at the first unfocused position, the first focused position and the second unfocused position respectively.

Figure 6 is a schematic diagram of the second detection method of the present invention (using the auxiliary light source to detect the vertex of the hyperboloid mirror).

Figure 7 is a schematic diagram of the third detection method of the present invention (detecting the angle of the hyperboloid mirror using a screen).

Figures 8A and 8B are schematic diagrams of the correct and incorrect angles of the hyperboloid mirror in Figure 7 respectively.

Figure 9 is a schematic diagram of the fourth detection method of the present invention (fine adjustment of the position of the hyperboloid mirror).

Figure 10 is a schematic diagram of the fifth detection method (fine-tuning the position of the screen) of the present invention.

Figure 11 is a flow chart of the detection method of the present invention.

Figure 12 is a simplified schematic diagram of the corresponding relationship between the relevant curves of the hyperboloid mirror of the present invention.

Figure 13 is a simplified schematic diagram of the correspondence relationship of a known hyperbola.

Referring to Figures 1, 2 and 3, the present invention is a detection device and a detection method for the focal length of a hyperboloid mirror. The detection device includes:

A machine part 10 has a first end 11 , a second end 12 and a slide rail 13 . The slide rail 13 is provided on the machine base 10 in a direction from the first end 11 to the second end 12 .

A main light source part 20 is provided on the slide rail 13 and adjacent to the first end 11; the main light source part 20 has a virtual optical axis L and five parallel light emitters 21, and the virtual optical axis L is Parallel to the slide rail 13, the five parallel light emitters 21 are respectively used to emit a first beam L1, a second beam L2, and a third beam from the first end 11 toward the second end 12. L3, a fourth beam L4 and a fifth beam L5. The first light beam L1 is coaxial with the virtual optical axis L, the second light beam L2, the third light beam L3, The fourth light beam L4 and the fifth light beam L5 are both parallel to the first light beam L1, and are distributed counterclockwise in sequence with the first light beam L1 as the center.

A parabolic mirror part 30 is disposed on the slide rail 13 and between the main light source part 20 and the second end 12 . The parabolic mirror part 30 has a parabolic mirror 31, and the parabolic mirror 31 has a central hollowed area 311, which is coaxial with the virtual optical axis L. In practice, the parabolic mirror 31 referred to in this case is a "concave" parabolic mirror.

A screen portion 40 is provided on the slide rail 13 and can slide relatively. The screen portion 40 has a screen 41 that is coaxial with the virtual optical axis L.

The hyperbolic mirror part 50 is arranged on the slide rail 13 and can slide relatively. The hyperbolic mirror part 50 is provided with a hyperbolic mirror 51. The hyperbolic mirror 51 has a vertex 51A (as shown in the first 6), which is coaxial with the virtual optical axis L. In practice, the hyperboloid mirror 51 referred to in this case is a "convex" hyperboloid mirror.

The auxiliary light source part 60 is arranged on the slide rail 13 and is adjacent to the second end 12 and can slide relatively. The auxiliary light source part 60 is used to move from the second end 12 toward the first end 11 direction, a sixth light beam L6 is emitted, and the sixth light beam L6 is coaxial with the virtual optical axis L.

A control part 70 is electrically connected to the main light source part 20 , the parabolic mirror part 30 , the screen part 40 , the hyperboloid mirror part 50 and the auxiliary light source part 60 .

Thereby, when the screen portion 40 is disposed on the slide rail 13 and the screen 41 is located at a first focusing position C1 (as shown in FIG. 4 ), it is between the main light source portion 20 and the parabolic mirror portion 30 When between, the first light beam L1 can be projected on the screen 41, and the second light beam L2, the third light beam L3, the fourth light beam L4 and the fifth light beam L5 can be reflected by the parabolic mirror part 30 Then, the first beam 11 is focused on The screen 41 (as shown in Figure 5B, the figure is only for illustration, in fact, the first light beam L1 should be located on the other side of the screen 41).

And when the screen part 40 retreats from the slide rail 13 and the hyperboloid mirror part 50 is disposed on the slide rail 13 and between the main light source part 20 and the parabolic mirror part 30, and the hyperboloid mirror part 50 When the vertex 51A of 51 is located at a correct position C2 (as shown in Figure 6), the sixth light beam L6 can pass through the central hollowed area 311 and irradiate the vertex 51A, and then be reflected along the original path.

When the screen 41 is reset to the slide rail 13 and is between the parabolic mirror part 30 and the hyperboloid mirror part 50, it does not block the second light beam L2, the third light beam L3, and the fourth light beam. When any one of the angles of L4 and the fifth beam L5 confirms the position C3 (as shown in Figure 7), it means that the second beam L2, the third beam L3, the fourth beam L4 and the fifth beam The light beams L5 are first reflected by the parabolic mirror 31 respectively (in order to avoid confusion of the lines in the figure, in Figure 7, the first reflection and the second reflection of the third light beam L3 and the fifth light beam L5 are After the lines (which are omitted and not shown), they reach the vertex 51A and are reflected for the second time, and then illuminate the screen 41 and are symmetrically distributed (as shown in Figure 8A).

In addition, when the vertex 51A of the hyperbolic mirror 51 is located at a vertex focusing position C4 (as shown in FIG. 10 ), and the screen 41 is located at a second position between the parabolic mirror part 30 and the auxiliary light source part 60 When focusing on the position C5, the second beam L2, the third beam L3, the fourth beam L4 and the fifth beam L5 are reflected by the parabolic mirror 31 for the first time, and then reach the vertex 51A and then the second beam. After reflection, it passes through the central hollowed area 311 and is focused on the screen 41 . The control part 70 detects the focal length of the hyperboloid mirror 51 through the information between the first focus position C1, the correct position C2, the angle confirmation position C3, the vertex focus position C4 and the second focus position C5.

Practically, the main light source part 20 is provided with a main light source slide M1. The main light source slide M1 is for the main light source part 20 to be installed on the slide rail 13 and is electrically connected to the control part 70. The control part 70 series through key light The source slide M1 controls the relative sliding of the main light source part 20 and the slide rail 13 and obtains relevant position information.

The parabolic mirror part 30 is provided with a parabolic mirror sliding seat M2. The parabolic mirror sliding seat M2 is for the parabolic mirror part 30 to be arranged on the slide rail 13 and is electrically connected to the control part 70. The control part 70 is connected through The parabolic mirror slide M2 controls the relative sliding of the parabolic mirror part 30 and the slide rail 13 and obtains relevant position information.

The screen part 40 is provided with a screen slide M3. The screen slide M3 is for the screen part 40 to be installed on the slide rail 13 and is electrically connected to the control part 70. The control part 70 is through the screen slide M3. , control the screen portion 40 and the slide rail 13 to slide relative to each other, and obtain relevant position information.

The hyperboloid mirror part 50 is provided with a hyperboloid mirror slide M4. The hyperboloid mirror slide M4 is for the hyperboloid mirror part 50 to be disposed on the slide rail 13 and is electrically connected to the control part 70. The control part The part 70 controls the relative sliding of the hyperboloid mirror part 50 and the slide rail 13 through the hyperboloid mirror slide M4, and obtains relevant position information.

The auxiliary light source part 60 is provided with a light source slide M5. The auxiliary light source slide M5 is for the auxiliary light source part 60 to be arranged on the slide rail 13 and is electrically connected to the control part 70. The control part 70 is through The auxiliary light source slide M5 controls the relative sliding of the auxiliary light source part 60 and the slide rail 13 and obtains relevant position information.

The part about the detection method of the focal length of the hyperboloid mirror (as shown in Figure 11) includes the following steps:

1. Preparation step S1: Refer to Figures 1, 2 and 3 to prepare a machine unit 10, a main light source unit 20 and a control unit 70. The machine part 10 has a first end 11 , a second end 12 and a slide rail 13 . The slide rail 13 is provided on the machine base 10 in a direction from the first end 11 to the second end 12 . The main light source part 20 is disposed on the slide rail 13 and adjacent to the first end 11; the main light source part 20 has a virtual optical axis L and five parallel light emitters 21, and the virtual optical axis L is connected to The slide rails 13 are parallel, and the five flat The row light emitter 21 is used to respectively emit a first beam L1, a second beam L2, a third beam L3, a fourth beam L4 and a first beam L4 in the direction from the first end 11 to the second end 12. Five-beam L5. The first beam L1 is coaxial with the virtual optical axis L, the second beam L2, the third beam L3, the fourth beam L4 and the fifth beam L5 are all parallel to the first beam L1, and with the The first beam L1 is centered and distributed counterclockwise in sequence. The control unit 70 is electrically connected to the main light source unit 20 .

2. Detecting the focus of the parabolic mirror Step S2: Prepare a parabolic mirror part 30 and a screen part 40; the parabolic mirror part 30 is installed on the slide rail 13 and is between the main light source part 20 and the second end 12 . The parabolic mirror part 30 has a parabolic mirror 31, and the parabolic mirror 31 has a central hollowed area 311, which is coaxial with the virtual optical axis L. The screen part 40 has a screen 41 which is coaxial with the virtual optical axis L. The control part 70 is electrically connected to the parabolic mirror part 30 and the screen part 40 .

When the screen part 40 is disposed on the slide rail 13 and between the main light source part 20 and the parabolic mirror part 30, fine-adjust the position of the screen 41, as shown in Figure 4, for example, one after another. Move between the unfocused position C1', a first focused position C1 and a second unfocused position C1", and it may be found that when located at the first unfocused position C1', the second light beam L2, the third light beam L3. After the fourth beam L4 and the fifth beam L5 are reflected by the parabolic mirror 31, they are not focused on the screen 41 at the same time as the first beam L1, and some of the beams are projected on the screen 41 after crossing (such as 5A). And it may be found that when located at the second unfocused position C1″, the second beam L2, the third beam L3, the fourth beam L4 and the fifth beam L5 pass through the parabolic mirror 31 After reflection, the first light beam L1 is also not focused on the screen 41 at the same time, but is projected on the screen 41 respectively (as shown in Figure 5C). Only when it is at the first focus position C1, the focus will appear on the screen 41 (as shown in FIG. 5B), which is defined as (detected) parabolic mirror focus F1 (as shown in FIG. 12).

3. Adjust the vertex of the hyperboloid mirror step S3: Refer to Figure 6, temporarily detach the screen part 40 from the slide rail 13, and prepare a hyperboloid mirror part 50 and a pair of light source parts 60. The hyperboloid mirror part 50 is It is provided on the slide rail 13 and can be between the main light source part 20 and the parabolic mirror part 30. The hyperboloid mirror part 50 is provided with a hyperboloid mirror 51, and the hyperboloid mirror 51 has a vertex 51A. . The auxiliary light source part 60 is disposed on the slide rail 13 and adjacent to the second end 12; when the auxiliary light source part 60 is controlled to emit a sixth light beam L6, the sixth light beam L6 is coaxial with the virtual optical axis L, and When the apex 51A of the hyperboloid mirror 51 is adjusted (such as adjusting the height position, ..., horizontal position, etc.) to a correct position C2, the sixth light beam L6 passes through the central hollow area 311 and irradiates behind the apex 51A. , can be reflected along the original path, thus completing the adjustment of the position of the vertex 51A of the hyperboloid mirror 51 .

4. Adjust the hyperboloid mirror angle step S4: Refer to Figure 7, reset the screen part 40 on the slide rail 13, between the parabolic mirror part 30 and the hyperboloid mirror part 50, and adjust it to When the angle is confirmed at position C3 (as shown in Figure 7), the second beam L2, the third beam L3, the fourth beam L4 and the fifth beam L5 are reflected for the first time by the parabolic mirror 31 respectively. Finally, after reaching the vertex 51A and reflecting for the second time, it is irradiated on the screen 41 and distributed symmetrically (as shown in Figure 8A), then the adjustment of the hyperboloid mirror angle is completed. Of course, if the angle adjustment is incorrect, the second beam L2, the third beam L3, the fourth beam L4 and the fifth beam L5 may be asymmetrically irradiated on the screen 41 (as shown in FIG. 8B).

5. Step S5 of detecting the focal length of the hyperboloid mirror: Refer to Figure 9 (in order to avoid confusion of the lines in the figure, in Figures 9 and 10, the first reflection and the third reflection of the third beam L3 and the fifth beam L5 The lines of the secondary reflection are omitted (not shown here and will be explained first). The screen part 40 is repositioned between the parabolic mirror part 30 and the auxiliary light source part 60. It is assumed that the vertex of the original hyperbolic mirror 51 is 51A is located at a vertex unfocused position C4' (in principle, the first focused position C1 of the screen 41), so that the second beam L2, the third beam L3, the fourth beam L4 and the fifth beam L5 It is just "concentrated illumination" on the screen 41, rather than To focus, you can further adjust the vertex 51A of the hyperboloid mirror 51 to a vertex focusing position C4 (as shown in Figure 10). If it still fails to focus and only reduces the area of concentrated illumination (Figure 10) If not shown, please state it first). Then the position of the screen 41 can be further fine-tuned, for example, from an unfocused position C5' to a second focused position C5, so that the second light beam L2, the third light beam L3, the fourth light beam L4 and the third light beam L4 can be finely adjusted. The five light beams L5 are reflected by the parabolic mirror 31 for the first time, reach the vertex 51A and are reflected for the second time, and then show focus on the screen 41, which is defined as the hyperboloid mirror focus F2. The hyperboloid mirror 51 has a focal length (f), and it can be detected that the focal length (f) = half the distance between the first focus position C1 and the second focus position C5 (as shown in Figure 12).

Practically, the main light source part 20 is provided with a main light source slide M1. The main light source slide M1 is for the main light source part 20 to be installed on the slide rail 13 and is electrically connected to the control part 70. The control part 70 controls the relative sliding of the main light source part 20 and the slide rail 13 through the main light source slide M1, and obtains relevant position information.

The parabolic mirror part 30 is provided with a parabolic mirror sliding seat M2. The parabolic mirror sliding seat M2 is for the parabolic mirror part 30 to be arranged on the slide rail 13 and is electrically connected to the control part 70. The control part 70 is connected through The parabolic mirror slide M2 controls the relative sliding of the parabolic mirror part 30 and the slide rail 13 and obtains relevant position information.

The screen part 40 is provided with a screen slide M3. The screen slide M3 is for the screen part 40 to be installed on the slide rail 13 and is electrically connected to the control part 70. The control part 70 is through the screen slide M3. , control the screen portion 40 and the slide rail 13 to slide relative to each other, and obtain relevant position information.

The hyperboloid mirror part 50 is provided with a hyperboloid mirror slide M4. The hyperboloid mirror slide M4 is for the hyperboloid mirror part 50 to be disposed on the slide rail 13 and is electrically connected to the control part 70. The control part Part 70 series through hyperbolic The mirror slide M4 controls the relative sliding of the hyperboloid mirror part 50 and the slide rail 13 and obtains relevant position information.

Also, referring to Figure 12, the hyperboloid mirror 51 has a major axis (a) and a minor axis (b).

The major axis (a) is equal to the focal length (f) minus the distance between the vertex unfocused position C4' (ie, the first focused position C1 of the screen 41) and the vertex focused position C4.

In addition, the minor axis (b) can be calculated by the following (Formula 1): f ² = a ² + b ² (Formula 1).

The auxiliary light source part 60 is provided with a light source slide M5. The auxiliary light source slide M5 is for the auxiliary light source part 60 to be arranged on the slide rail 13 and is electrically connected to the control part 70. The control part 70 is through The auxiliary light source slide M5 controls the relative sliding of the auxiliary light source part 60 and the slide rail 13 and obtains relevant position information.

The advantages and effects of this case can be summarized as follows:

[1] Can quickly detect the focal length of the hyperboloid mirror. The invention is cleverly designed and the same screen can be moved to different positions through preparation steps, detecting the focus of the parabolic mirror, adjusting the vertex of the hyperbolic mirror, adjusting the angle of the hyperbolic mirror, and detecting the focal length of the hyperbolic mirror and other related steps. (The relevant steps will not be described in detail). Using the principle of beam focusing, the focal length of the hyperboloid mirror can be detected without tedious calculations in the process. Therefore, the focal length of the hyperboloid mirror can be quickly detected.

[2] Other parameters of the hyperboloid mirror can be quickly obtained. Through the design and detection of the present invention, while the focal length of the hyperboloid mirror is quickly detected, other parameters of the hyperboloid mirror (such as the major axis and minor axis of the hyperboloid mirror) can also be easily and quickly detected or calculated (obtained). ), and available for use. Therefore, other parameters of the hyperboloid mirror can be quickly obtained.

[3] The overall device and detection method are relatively simple. The present invention can detect the focal length and other parameters of the hyperboloid mirror that were difficult to detect in the past as long as the control unit controls each sliding seat and the components located on each sliding seat. The device and detection method are relatively simple and low-cost, making it easier to commercialize the product. Therefore, the overall device and detection method are relatively simple.

The above is only a detailed description of the present invention through preferred embodiments. Any simple modifications and changes made to the embodiments do not deviate from the spirit and scope of the present invention.

10: Machine Department

11:First end

12:Second end

13:Slide rail

20: Main light source part

21: Parallel light emitter

30: Parabolic mirror part

31:Parabolic mirror

311:Central Hollowed Area

40:Screen Department

41:Screen

50: Hyperboloid mirror part

51:Hyperboloid mirror

60: Sub-light source part

70:Control Department

L: virtual optical axis

L1: first beam

L2: Second beam

L3: The third beam

L4: The fourth beam

L5: The fifth beam

C1: first focus position

M1: Main light source sliding seat

M2: Parabolic mirror slide seat

M3:Screen slide

M4: Hyperboloid mirror slide

M5: Auxiliary light source slide

Claims (6)

A device for detecting the focal length of a hyperboloid mirror, which includes: a machine part having a first end, a second end and a slide rail; the slide rail is arranged from the first end toward the second end. On the machine part; a main light source part is provided on the slide rail and adjacent to the first end; the main light source part has a virtual optical axis and five parallel light emitters, and the virtual optical axis is Parallel to the slide rail, the five parallel light emitters are respectively used to emit a first beam, a second beam, a third beam, a fourth beam and a direction from the first end toward the second end. The fifth beam; the first beam is coaxial with the virtual optical axis, the second beam, the third beam, the fourth beam and the fifth beam are all parallel to the first beam, and the first beam as the center, distributed counterclockwise in order; a parabolic mirror part is installed on the slide rail and is between the main light source part and the second end; the parabolic mirror part has a parabolic mirror, the parabolic mirror The mirror system has a central hollowed-out area that is coaxial with the virtual optical axis; a screen portion is used to be installed on the slide rail and can slide relatively; the screen portion has a screen that is coaxial with the virtual optical axis; The optical axis is coaxial; a double-curved mirror part is arranged on the slide rail and can slide relatively. The double-curved mirror part is provided with a double-curved mirror. The double-curved mirror has a vertex, which is connected to the The virtual optical axis is coaxial; an auxiliary light source part is used to be disposed on the slide rail and adjacent to the second end; and can slide relatively; the auxiliary light source part is used to move from the second end toward the first end direction, emits a sixth light beam, the sixth light beam is coaxial with the virtual optical axis; and A control part is electrically connected to the main light source part, the parabolic mirror part, the screen part, the hyperboloid mirror part and the auxiliary light source part. The device for detecting the focal length of a hyperboloid mirror as described in claim 1, wherein: when the screen portion is disposed on the slide rail and the screen is at a first focusing position, it is between the main light source portion and the parabolic mirror portion between, the first light beam can be projected on the screen, and the second light beam, the third light beam, the fourth light beam and the fifth light beam can be reflected by the parabolic mirror part and then be compared with the first light beam. Focus on the screen at the same time; and when the screen part retreats from the slide rail and the hyperboloid mirror part is disposed on the slide rail and between the main light source part and the parabolic mirror part, and the hyperboloid mirror part When the vertex of the mirror is in a correct position, the sixth beam can pass through the central hollow area and illuminate the vertex, and then be reflected along the original path; and then when the screen is reset on the slide rail, and the When the position of any one of the second beam, the third beam, the fourth beam and the fifth beam is confirmed at an angle between the parabolic mirror part and the hyperbolic mirror without blocking the third beam, the third beam is The two light beams, the third light beam, the fourth light beam and the fifth light beam are respectively reflected for the first time by the parabolic mirror, reach the vertex and are reflected for the second time before illuminating the screen, and are symmetrically distributed; in addition, When the vertex of the hyperbolic mirror is set at a vertex focusing position, and the screen is set at a second focusing position between the parabolic mirror part and the auxiliary light source part, the second light beam and the third light beam are , the fourth beam and the fifth beam are respectively reflected for the first time by the parabolic mirror, reach the vertex and are reflected for the second time, pass through the central hollow area and focus on the screen; and the control unit Through the information between the first focus position, the correct position, the angle confirmation position, the vertex focus position and the second focus position, the focal length of the hyperboloid mirror is detected. The device for detecting the focal length of a hyperboloid mirror as described in claim 1, wherein: the main light source part is provided with a main light source sliding seat, and the main light source sliding seat is for the main light source part to be arranged on the slide rail, and the electrical Connected to the control part, the control part controls the relative sliding of the main light source part and the slide rail through the main light source slide, and obtains relevant position information; the parabolic mirror part is equipped with a parabolic mirror slide, and the parabolic mirror slides The base is for the parabolic mirror part to be installed on the slide rail and is electrically connected to the control part. The control part controls the relative sliding of the parabolic mirror part and the slide rail through the parabolic mirror sliding seat and obtains relevant position information. ; The screen section is provided with a screen slider, which is used for the screen section to be placed on the slide rail and is electrically connected to the control section. The control section controls the screen section and the screen section through the screen slider. The slide rails slide relative to each other and obtain relevant position information; the hyperboloid mirror part is equipped with a hyperboloid mirror slide seat, and the hyperboloid mirror slide seat is for the hyperboloid mirror part to be placed on the slide rail and electrically connected The control part controls the relative sliding of the hyperboloid mirror part and the slide rail through a hyperboloid mirror slide, and obtains relevant position information; and the auxiliary light source part is equipped with a pair of light source slides, which The light source slide is for the auxiliary light source part to be installed on the slide rail and is electrically connected to the control part. The control part controls the relative sliding of the auxiliary light source part and the slide rail through the auxiliary light source slide and obtains relevant information. Location information. A method for detecting the focal length of a hyperboloid mirror, which includes the following steps: 1. Preparation step: prepare a machine part, a main light source part and a control part; the machine part has a first end, a second end and A slide rail; the slide rail is provided on the machine part from the first end to the second end; the main light source part is provided on the slide rail and adjacent to the first end; the main light source The department has A virtual optical axis and five parallel light emitters. The virtual optical axis is parallel to the slide rail. The five parallel light emitters are respectively used to emit a first light beam from the first end toward the second end. , a second beam, a third beam, a fourth beam and a fifth beam; the first beam is coaxial with the virtual optical axis, the second beam, the third beam, the fourth beam and the The five beams are all parallel to the first beam, and are distributed counterclockwise with the first beam as the center; the control part is electrically connected to the main light source part; 2. Steps to detect the focus of the parabolic mirror: prepare a parabola Mirror part and a screen part; the parabolic mirror part is arranged on the slide rail and is between the main light source part and the second end; the parabolic mirror part has a parabolic mirror, and the parabolic mirror has a central The hollowed-out area is coaxial with the virtual optical axis; the screen unit has a screen that is coaxial with the virtual optical axis; the control unit is electrically connected to the parabolic mirror unit and the screen unit; when the screen is disposed on the slide rail and between the main light source part and the parabolic mirror part, and when the screen is finely adjusted to allow the second light beam, the third light beam, the fourth light beam and the fifth light beam to pass through the After reflection by the parabolic mirror, the detection is completed when a first focus position of the focus appears on the screen at the same time as the first beam, and the focus is defined as the focus of the parabolic mirror; 3. Steps to adjust the vertex of the hyperbolic mirror: The screen part temporarily detaches the slide rail, and prepares a hyperbolic mirror part and a pair of light source parts. The hyperbolic mirror part is arranged on the slide rail and is between the main light source part and the parabolic mirror part. , the hyperboloid mirror part is equipped with a double-curved mirror, and the hyperboloid mirror has a vertex; the auxiliary light source part is arranged on the slide rail and adjacent to the second end; when the auxiliary light source part is controlled to emit a sixth The sixth light beam is coaxial with the virtual optical axis. When the vertex of the hyperboloid mirror is adjusted to a correct position, the sixth light beam passes through the central hollow area and irradiates the vertex, and then can move along the original Path reflection, thus completing the adjustment of the vertex position of the hyperboloid mirror; 4. Steps for adjusting the angle of the hyperboloid mirror: Replace the screen part on the slide rail and between the parabolic mirror part and the hyperboloid mirror, and when adjusted to an angle confirmation position, the second The light beam, the third light beam, the fourth light beam and the fifth light beam are respectively reflected for the first time by the parabolic mirror, reach the vertex and are reflected for the second time, then illuminate the screen and are symmetrically distributed, that is, completion Adjust the angle of the hyperbolic mirror; and 5. Steps to detect the focal length of the hyperbolic mirror: Change the screen part to between the parabolic mirror part and the auxiliary light source part, and adjust the vertex of the hyperbolic mirror to a vertex focus position , and when the screen is adjusted to a second focus position, the second beam, the third beam, the fourth beam and the fifth beam are respectively reflected for the first time by the parabolic mirror and then reach the vertex. After the second reflection, a focus appears on the screen, which is defined as the focus of the hyperboloid mirror; the hyperboloid mirror has a focal length (f), and it can be detected that the focal length (f) = the first focus position and half the distance between the second focus positions. The method for detecting the focal length of a hyperboloid mirror as described in claim 4, wherein: the main light source part is provided with a main light source sliding seat, and the main light source sliding seat is for the main light source part to be arranged on the slide rail, and the electrical Connected to the control part, the control part controls the relative sliding of the main light source part and the slide rail through the main light source slide, and obtains relevant position information; the parabolic mirror part is equipped with a parabolic mirror slide, and the parabolic mirror slides The base is for the parabolic mirror part to be installed on the slide rail and is electrically connected to the control part. The control part controls the relative sliding of the parabolic mirror part and the slide rail through the parabolic mirror sliding seat and obtains relevant position information. ; The screen section is provided with a screen slider, which is used for the screen section to be placed on the slide rail and is electrically connected to the control section. The control section controls the screen section and the screen section through the screen slider. The slide rails slide relative to each other and obtain relevant position information; The hyperboloid mirror part is equipped with a hyperboloid mirror sliding seat. The hyperboloid mirror slider is for the hyperboloid mirror part to be arranged on the slide rail and is electrically connected to the control part. The control part is connected through the hyperboloid mirror. The sliding seat controls the relative sliding of the hyperboloid mirror part and the slide rail, and obtains relevant position information; and the auxiliary light source part is provided with a light source sliding seat, and the auxiliary light source sliding seat is for the auxiliary light source part to be installed on the On the slide rail, and electrically connected to the control part, the control part controls the relative sliding of the auxiliary light source part and the slide rail through the auxiliary light source slide, and obtains relevant position information. The method for detecting the focal length of a hyperboloid mirror as described in claim 4, wherein: the hyperboloid mirror has a major axis (a) and a minor axis (b); the major axis (a) is equal to the focal length (f) Subtract the distance between the unfocused position of the vertex and the focused position of the vertex; and the minor axis (b) can be calculated through the following (Formula 1): f ² = a ² + b ² (Formula 1).

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