Surface shape detecting device and method for aspherical cylindrical lens

Abstract

The application provides a surface type detection device and method for aspherical cylindrical lenses, comprising: a placing table, the placing table comprising an adjusting platform, a Y-axis displacement table arranged on the adjusting platform and movable along a Y-axis direction, an X-axis displacement table arranged on the Y-axis displacement table and movable along an X-axis direction, and a C-axis displacement table arranged on the X-axis displacement table and rotatable; and a detection probe arranged above the placing table; wherein the detection probe contacts the aspherical cylindrical lens through a probe needle, collects three-point coordinates of a predetermined position relationship, constructs a trigonometric function relationship and obtains a deflection angle, adjusts the deflection angle through the C-axis displacement table rotation, and adjusts the aspherical generatrix to a direction perpendicular to the detection path of the detection probe. The application adjusts the deflection angle through rotation, so that the aspherical generatrix and the detection path are in a perpendicular direction, thereby improving the precision of surface type compensation, improving the detection efficiency, and reducing the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of surface profile detection of optical aspheric surface, in particular to a surface profile detection device and method for aspheric cylindrical lens. BACKGROUND

[0002] In refractive optical systems, rotational spherical lenses and aspheric elements have been widely used, but because rotational spherical lenses and aspheric lenses can only present a single image size when imaging, if the size of the image needs to be adjusted, a more complex optical system is often required. In contrast, a simple aspheric cylindrical lens can meet the design requirements of image size, which makes the product have the advantages of fewer optical elements and smaller product size, and therefore is favored.

[0003] Traditional cylindrical lenses can be mass-produced by milling, grinding and polishing processes, but for aspheric cylindrical lenses, because the profile of the surface is more complex, traditional processing methods cannot achieve production, so glass cylindrical aspheric lenses often use precision molding processing technology, that is, by heating the glass blank to above the glass transition temperature point, the softened glass is molded at high temperature, the shape of the glass is transferred to the surface of the mold, and then the specific aspheric cylindrical lens is formed after cooling and demolding.

[0004] Because of the thermal expansion and contraction phenomenon of glass during heating and cooling, there is a certain difference between the shape of the demolded copy and the shape of the mold, so it is necessary to detect the surface profile of the cylindrical aspheric surface, analyze the difference value to compensate for defects, and obtain the design value of the drawing surface; but when detecting the surface profile of the cylindrical aspheric surface, because the perpendicular line of the generatrix cannot be accurately found, the detection result is greatly different from the actual value, therefore, an accurate, fast and convenient detection method is urgently needed to ensure the qualified rate of the molded cylindrical aspheric product. SUMMARY

[0005] In a first aspect of the present application, a surface profile detection device for aspheric cylindrical lens is provided, comprising:

[0006] a placement table, the placement table comprising a regulating platform, a Y-axis displacement table arranged on the regulating platform and movable along the Y-axis direction, an X-axis displacement table arranged on the Y-axis displacement table and movable along the X-axis direction, and a C-axis displacement table arranged on the X-axis displacement table and rotatable;

[0007] a detection probe, the detection probe being arranged above the placement table;

[0008] The detection probe contacts the aspheric cylindrical lens through a probe needle, three point coordinates of a predetermined position relationship are collected, a trigonometric function relationship is constructed and a deflection angle is obtained, the deflection angle is adjusted through a C-axis displacement table, and the aspheric generatrix is adjusted to a direction perpendicular to the detection path of the detection probe.

[0009] Further, the adjusting platform comprises a first knob for adjusting the levelness.

[0010] Further, the adjusting platform further comprises an adjusting platform surface, a base and an adjusting column arranged between the adjusting platform surface and the base, and the first knob is arranged on the adjusting column.

[0011] Further, the adjusting platform surface, the Y-axis displacement table, the X-axis displacement table and the C-axis displacement table are connected through screws.

[0012] Further, the adjusting platform surface, the Y-axis displacement table, the X-axis displacement table and the C-axis displacement table are correspondingly provided with counterbores and threaded holes, and the screws connect the counterbores and the threaded holes.

[0013] Further, the C-axis displacement table is provided with a second knob for adjusting the rotation angle of the C-axis displacement table.

[0014] Further, the X-axis displacement table is provided with a third knob for adjusting the movement of the X-axis displacement table along the X-axis.

[0015] Further, the Y-axis displacement table is provided with a fourth knob for adjusting the movement of the Y-axis displacement table along the Y-axis.

[0016] The second aspect of the object of the present application provides a surface type detection method for an aspheric cylindrical mirror, comprising the following steps:

[0017] Step 1, fix the displacement tables of X-axis, Y-axis and C-axis with the adjusting platform, and adjust the levelness of the displacement tables of X-axis, Y-axis and C-axis through the adjusting platform and the detection probe;

[0018] Step 2, after the levelness adjustment is completed, fix the aspheric cylindrical lens to be detected on the C-axis displacement table for surface type detection;

[0019] Step 3, contact the aspheric cylindrical lens by moving the detection probe up and down to obtain a first end point, and take the first end point as point A;

[0020] Step 4, adjust the Y-axis displacement table to move along the Y-axis through the fourth knob, contact the aspheric cylindrical lens through the detection probe to obtain a second end point, take the second end point as point B, and the X-axis coordinate value of the point B is the same as that of the point A;

[0021] Step 5, the X-axis displacement table is moved along the X-axis by adjusting the third knob, the detection probe contacts the aspheric cylindrical lens, a third end point is obtained, the third end point is taken as point C, and the Z-axis coordinate value of the point C is same as that of the point A;

[0022] Step 6, the point B is projected on a horizontal plane of the edge AC to obtain a projection point B', and the edge AC and the point B' form a right triangle AB'C;

[0023] Step 7, the coordinate values of the points A, C and B' in the right triangle AB'C are substituted into a trigonometric function formula to construct a trigonometric function relationship, and a deflection angle is obtained;

[0024] Step 8, according to the deflection angle, the C-axis displacement table is rotated, and the aspheric generatrix is adjusted to a direction perpendicular to the detection path of the detection probe.

[0025] Further, in the step 7, the deflection angle is obtained, and the deflection angle comprises:

[0026] The coordinate values of the points A, C and B' are substituted into a trigonometric function formula to obtain a mathematical expression formula of the trigonometric function relationship, and the mathematical expression formula is as follows:

[0027] tan ∠A = B'C / AB'

[0028] Solving, the following is obtained:

[0029] ∠A = Arctan

[0030] Wherein, ∠A is the deflection angle.

[0031] The beneficial effects reached by the technical scheme of the present application are as follows: on one hand, the high-precision jig is self-made, the purpose of small size and easy carrying and placing of the jig is achieved, the procurement cost of high-precision equipment is reduced, and the precision of surface type compensation is improved through high-precision cylindrical surface type detection, so that the quality of products is improved; on the other hand, after the leveling jig is adjusted, only three point coordinates of a predetermined position relationship need to be collected when the cylindrical aspheric surface type is detected, and the corresponding deflection angle can be obtained, the knob on the C-axis displacement table is adjusted, and the deflection angle is rotated, so that the aspheric generatrix and the detection path are in a perpendicular direction, so that the detection time is saved, the detection efficiency is improved, and the time cost is reduced.

[0032] It should be understood that all combinations of the aforementioned concepts and additional concepts described in greater detail below can be seen as part of the subject matter of the present disclosure, as long as such concepts are not mutually contradictory. In addition, all combinations of the claimed subject matter are considered part of the subject matter of the present disclosure.

[0033] The foregoing and other aspects, embodiments and features of the present teachings can be better understood from the following detailed description taken in conjunction with the drawings. Other aspects, embodiments and features of the present teachings will be apparent from the detailed description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical, or nearly identical, component that is illustrated in various figures is represented with a like numeral. For purposes of clarity, not every component is called out in every drawing. Embodiments of various aspects of the present teachings will now be described, by way of example, with reference to the drawings, in which:

[0035] Figure 1 is a front view of a surface profile detection device for aspheric cylindrical lenses shown in the present invention;

[0036] Figure 2 is a top view of a surface profile detection device for aspheric cylindrical lenses shown in the present invention;

[0037] Figure 3 is a contrast schematic diagram of aspheric cylindrical lenses before and after detection of a surface profile detection device for aspheric cylindrical lenses shown in the present invention;

[0038] Figure 4 is a top view of an X-axis displacement stage of a surface profile detection device for aspheric cylindrical lenses shown in the present invention;

[0039] Figure 5 is a top view of a Y-axis displacement stage of a surface profile detection device for aspheric cylindrical lenses shown in the present invention;

[0040] Figure 6 is a top view of a C-axis displacement stage of a surface profile detection device for aspheric cylindrical lenses shown in the present invention;

[0041] Figure 7 is a partial sectional view of a surface profile detection device for aspheric cylindrical lenses shown in the present invention;

[0042] Figure 8 is a flowchart of a surface profile detection method for aspheric cylindrical lenses shown in the present invention;

[0043] In the drawings: M, a placement stage, 1, a C-axis displacement stage, 2, an X-axis displacement stage, 3, a Y-axis displacement stage, 4, an adjustment platform, 41, an adjustment platform surface, 42, a base, 43, an adjustment column, 5, a first knob, 6, an aspheric cylindrical lens, 7, a second knob, 8, a detection probe, 9, a counterbore, 10, a threaded hole, 11, a screw, 12, a fourth knob, 13, a third knob. DETAILED DESCRIPTION

[0044] In order to better understand the technical content of the present application, specific embodiments are described below with reference to the accompanying drawings.

[0045] Aspects of the present application are described in the disclosure by reference to the accompanying drawings, which show many illustrative embodiments. The embodiments of the present disclosure are not necessarily intended to include all aspects of the present application. It should be understood that various concepts and embodiments introduced above, and those described in more detail below, can be implemented in any of numerous ways, as the concepts and embodiments disclosed herein are not limited to any one implementation. Additionally, some aspects of the present application can be utilized to alone or in any appropriate combination with other aspects of the present application.

[0046] At present, in the production and manufacturing process of aspheric cylindrical lenses, the surface type of the aspheric surface cannot reach the design value of the drawing due to the precision and process problems of the production and manufacturing equipment, and needs to be corrected by detecting the actual value of the surface type and combining the compensation method. However, when the surface type is detected, accurate measurement cannot be achieved, so that even if the surface type after processing is compensated and corrected, it cannot reach the specification standard marked on the drawing. Therefore, the embodiment of the present application provides a surface type detection device and method for aspheric cylindrical lenses to improve the accuracy of surface type detection of cylindrical aspheric lenses.

[0047] In combination Figures 1-7 The surface type detection device for aspheric cylindrical lenses of the exemplary embodiment of the present application shown in the figure comprises a placement table M for high-precision detection of the surface type of the aspheric cylindrical lenses and a detection probe 8 for collecting three-point coordinates.

[0048] The placement table M comprises a regulating platform 4, a Y-axis displacement table 3 arranged on the regulating platform 4 and movable along the Y-axis direction, an X-axis displacement table 2 arranged on the Y-axis displacement table 3 and movable along the X-axis, and a C-axis displacement table 1 arranged on the X-axis displacement table 2 and rotatable.

[0049] The detection probe 8 is arranged above the placement table M.

[0050] In the embodiment of the present application, the detection probe 8 contacts the aspheric cylindrical lens 6 through the probe needle head, collects three-point coordinates of the predetermined position relationship, constructs a trigonometric function relationship and obtains a deflection angle, adjusts the deflection angle through the C-axis displacement table 1 rotation, and adjusts the aspheric generatrix to the direction perpendicular to the detection path of the detection probe 8.

[0051] As an optional embodiment, the detection probe 8 is a detachable component, so as to facilitate carrying and storage, and avoid damage and affect the detection accuracy of the detection probe 8 due to bumping.

[0052] As an optional embodiment, a second knob 7 for adjusting the rotation angle of the C-axis displacement table 1 is arranged on the C-axis displacement table 1.

[0053] As an optional embodiment, the X-axis displacement table 2 is provided with a third knob 13 for adjusting the movement of the X-axis displacement table 2 along the X-axis.

[0054] As an optional embodiment, the Y-axis displacement table 3 is provided with a fourth knob 12 for adjusting the movement of the Y-axis displacement table 3 along the Y-axis.

[0055] As an optional embodiment, the adjusting platform 4 is provided with a first knob 5 for adjusting the levelness.

[0056] As an optional embodiment, the adjusting platform 4 comprises an adjusting platform surface 41, a base 42 and an adjusting column 43 arranged between the adjusting platform surface 41 and the base 42, and the first knob 5 is arranged on the adjusting column 43.

[0057] As an optional embodiment, the Y-axis displacement table 3, the X-axis displacement table 2, the adjusting platform surface 41 and the C-axis displacement table 1 are connected through a screw 11.

[0058] As an optional embodiment, the Y-axis displacement table 3, the X-axis displacement table 2, the adjusting platform surface 41 and the C-axis displacement table 1 are respectively provided with a counterbore 9 and a threaded hole 10, and the screw 11 connects the counterbore 9 and the threaded hole 10.

[0059] As an optional embodiment, the X-axis, Y-axis and C-axis displacement tables are respectively provided with a plurality of counterbores 9 and threaded holes 10, so as to facilitate the assembly and disassembly of the jig, and avoid affecting the detection accuracy of the jig due to bumps during storage and transportation.

[0060] In the embodiment of the present application, the C-axis displacement table 1, the X-axis displacement table 2 and the Y-axis displacement table 3 are respectively moved / rotated through the second knob 7, the third knob 13 and the fourth knob 12, wherein:

[0061] X-axis displacement: the X-axis displacement table 2 is moved by clockwise / anticlockwise rotating the third knob 13, when the third knob 13 is rotated clockwise, the X-axis displacement table 1 moves left along the X-axis, and when the third knob 13 is rotated anticlockwise, the X-axis displacement table 1 moves right along the X-axis;

[0062] Y-axis displacement: the Y-axis displacement table 3 is moved by clockwise / anticlockwise rotating the fourth knob 12, when the fourth knob 12 is rotated clockwise, the Y-axis displacement table 3 moves forward along the Y-axis, and when the fourth knob 12 is rotated anticlockwise, the Y-axis displacement table 3 moves backward along the Y-axis;

[0063] C-axis displacement: the C-axis displacement table 1 is rotated by clockwise / anticlockwise rotating the second knob 7, when the second knob 7 is rotated clockwise, the C-axis displacement table 1 rotates left by an angle, and when the second knob 7 is rotated anticlockwise, the C-axis displacement table 1 rotates right by an angle.

[0064] It should be noted that the X-axis displacement table 2 and the Y-axis displacement table 3 move displacement distances, and the C-axis displacement table 1 rotates an angle of rotation.

[0065] In an optional embodiment, the second knob 7 is connected with the central shaft of the C-axis displacement table 1 to control the rotation angle of the C-axis displacement table 1.

[0066] In an optional embodiment, a standard horizontal gauge is placed on the C-axis displacement table 1, so that the detection probe 8 collects a Z coordinate value (i.e., a Z-axis coordinate in the coordinate system) on the upper surface of the standard horizontal gauge to obtain a Z coordinate difference value, thereby facilitating the first knob 5 to adjust the levelness of the platform 4.

[0067] In the embodiment of the present application, in view of the low accuracy and efficiency of the surface type detection of the cylindrical aspherical lens, a surface type detection method for an aspherical cylindrical lens is provided. The three-point coordinates of the predetermined position relationship are collected by the self-made high-precision jig, the trigonometric function relationship is constructed, and the deflection angle is obtained. The deflection angle is adjusted by the C-axis displacement table 1 to make the aspherical generatrix and the detection path in the vertical direction, so as to accurately find the surface type detection vertical line of the aspherical generatrix on the aspherical cylindrical lens 6, reduce the difference between the detection value and the actual value, improve the accuracy of the surface type compensation, improve the detection efficiency, save the detection time, and reduce the time cost.

[0068] Reference Figure 1 , 2 , in Figure 8 , the process of the surface type detection method for an aspherical cylindrical lens is exemplarily shown, which comprises the following steps:

[0069] Step 1, fix the displacement tables of X-axis, Y-axis and C-axis with the platform 4, and adjust the levelness of the displacement tables of X-axis, Y-axis and C-axis through the platform 4 and the detection probe 8;

[0070] Step 2, after the levelness adjustment is completed, fix the aspherical cylindrical lens 6 to be detected on the C-axis displacement table 1 for surface type detection;

[0071] Step 3, contact the aspherical cylindrical lens 6 by moving the detection probe 8 up and down to obtain a first end point, and take the first end point as point A;

[0072] Step 4, adjust the Y-axis displacement table 3 to move along the Y-axis through the fourth knob 12, contact the aspherical cylindrical lens 6 by the detection probe 8 to obtain a second end point, take the second end point as point B, and the X-axis coordinate value of point B is the same as that of point A;

[0073] Step 5, adjust the X-axis displacement table 2 to move along the X-axis through the third knob 13, contact the aspherical cylindrical lens 6 by the detection probe 8 to obtain a third end point, take the third end point as point C, and the Z-axis coordinate value of point C is the same as that of point A.

[0074] Step 6, project point B on the horizontal plane of edge AC to obtain a projection point B', so that edge AC and point B' form a right triangle ABC;

[0075] Step 7, substitute the coordinate values of points A, C and B' in the right triangle ABC into the trigonometric function formula to construct a trigonometric function relationship and obtain a deflection angle;

[0076] Step 8, according to the deflection angle, rotate the C-axis displacement table 1 to adjust the aspheric surface generatrix to a direction perpendicular to the detection probe 8 detection path.

[0077] In the embodiment of the application, the C-axis displacement table 1, the X-axis displacement table 2, the Y-axis displacement table 3 and the adjusting platform 4 are locked and fixedly assembled through the counterbore 9, the threaded hole 10 and the screw 11, and then a standard horizontal gauge block is selected and placed on the C-axis displacement table 1, four corner points on the surface of the horizontal gauge block are collected by the detection probe 8, the Z coordinate values of the four corner points are recorded, the Z coordinate difference values of the four corner points are calculated, the height of the adjusting platform 4 is adjusted by rotating the first knob 5 of the adjusting platform 4, so that the Z coordinate values of the four points are equal, and the horizontal degree adjustment of the placing table M is completed.

[0078] In the optional embodiment, a layer of adhesive glue is applied on the C-axis displacement table 1, and the aspheric cylindrical lens 6 to be detected is placed on the C-axis displacement table 1 after the horizontal degree adjustment to prevent displacement during detection and cause detection error.

[0079] In the optional embodiment, the detection probe 8 is electrically connected with the coordinate recorder to accurately record and collect three-point coordinates of a predetermined position relationship, so as to improve the detection accuracy and efficiency.

[0080] In the embodiment of the application, points A, B, C and B' are selected to construct a right triangle ABC to calculate the deflection angle, which comprises:

[0081] The detection probe 8 is moved up and down to drop the detection probe 8 at any position near the center of the aspheric cylindrical lens 6, the point where the detection probe 8 is dropped is taken as a first end point, and the coordinate values (X1, Y1, Z1) of the first end point are recorded, so that the coordinate point is the point A;

[0082] At this time, the X-axis coordinate is fixed, the fourth knob 12 is rotated to adjust the Y-axis displacement table 3 to move along the Y-axis by a distance unit of -Y1, the detection probe 8 contacts the aspheric cylindrical lens 6 to obtain a second end point, the coordinate values (X1, Y2, Z2) of the second end point are recorded, so that the coordinate point is the point B, the X-axis coordinate values of the point B and the point A are the same, the point B and the point A are symmetrical along the X-axis on the aspheric cylindrical lens 6, and Z1≠Z2;

[0083] Screwing the third knob 13 adjusts the X-axis displacement table 2 to move along the X-axis until the detection probe 8 detects the coordinate point Z1=Z3 on the aspheric cylindrical lens 6, which is taken as a third end point, and the coordinate value (X3, Y3, Z3) thereof is recorded, so that the coordinate point is point C, and the Z-axis coordinate value of point C is the same as that of point A;

[0084] According to Z1=Z3, points A and C are on the same horizontal plane parallel to the C-axis displacement table 1, at this time, point B is projected on the horizontal plane of edge AC to obtain a projection point B', and the B' coordinate (X1, Y2, Z3) is recorded to obtain a right triangle ABC.

[0085] It should be noted that, since the aspheric cylindrical lens is centrally symmetric, when point C is obtained, two points Z1=Z3 will appear, at this time, the point with the smallest displacement in the X-axis direction is selected as point C, and the point with a larger displacement distance is discarded, so as to improve the calculation accuracy.

[0086] In the embodiment of the application, the deflection angle is obtained, comprising:

[0087] The coordinate values of points A, C and B' are substituted into the trigonometric function formula to obtain a mathematical expression formula of the trigonometric function relationship, as follows:

[0088] AB'=|Y2-Y1|

[0089] B'C=|X1-X3|

[0090] tan ∠A=B'C / AB'=|X1-X3| / |Y2-Y1|

[0091] Solving, we obtain:

[0092] ∠A=arctan B'C / AB'=arctan(|X1-X3| / |Y2-Y1|)

[0093] Wherein, ∠A is the deflection angle.

[0094] Preferably, the aspheric cylindrical lens on the C-axis displacement table 1 can be rotated by the deflection angle ∠A to make the aspheric generatrix and the detection path be in the vertical direction, so as to accurately find the face type detection vertical line of the aspheric generatrix on the aspheric cylindrical lens 6, reduce the difference between the detection value and the actual value, and improve the face type detection accuracy of the aspheric cylindrical lens.

[0095] Although the present application has been disclosed with reference to the preferred embodiments above, it is not intended to limit the present application. Those skilled in the art without departing from the spirit and scope of the present application can make various modifications and improvements. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims.

Claims

1. A surface shape detecting device for aspherical cylindrical lens, characterized by comprising: The application relates to a non-spherical surface cylindrical lens detection device, which comprises the following parts: a placing table (M) which comprises a regulating platform (4), a Y-axis displacement table (3) arranged on the regulating platform (4) and capable of moving along the Y-axis, an X-axis displacement table (2) arranged on the Y-axis displacement table (3) and capable of moving along the X-axis, and a C-axis displacement table (1) arranged on the X-axis displacement table (2) and capable of rotating; a detection probe (8) arranged above the placing table (M); wherein the detection probe (8) contacts the non-spherical surface cylindrical lens (6) through a probe needle head, collects three-point coordinates of a predetermined position relationship, constructs a trigonometric function relationship and obtains a deflection angle, the C-axis displacement table (1) is rotated to adjust the deflection angle, and the non-spherical surface generatrix is adjusted to a direction perpendicular to the detection path of the detection probe (8), and the specific process comprises the following steps: Step 1: the X-axis, Y-axis and C-axis displacement tables and the regulating platform (4) are fixed, and the X-axis, Y-axis and C-axis displacement tables are adjusted in levelness through the regulating platform (4) and the detection probe (8); Step 2: after the levelness adjustment is completed, the non-spherical surface cylindrical lens (6) to be detected is fixed on the C-axis displacement table (1) to perform surface detection; Step 3: the detection probe (8) is moved up and down to contact the non-spherical surface cylindrical lens (6), a first end point is obtained, and the first end point is taken as point A; Step 4: the Y-axis displacement table (3) is moved along the Y-axis through a fourth knob (12), the detection probe (8) contacts the non-spherical surface cylindrical lens (6), a second end point is obtained, the second end point is taken as point B, and the X-axis coordinate value of the point B is the same as that of the point A; Step 5: the X-axis displacement table (2) is moved along the X-axis through a third knob (13), the detection probe (8) contacts the non-spherical surface cylindrical lens (6), a third end point is obtained, the third end point is taken as point C, and the Z-axis coordinate value of the point C is the same as that of the point A; Step 6: the point B is projected on a horizontal plane where the edge AC is located to obtain a projection point B', and a right-angled triangle ABC is constructed with the edge AC and the point B'; Step 7: in the constructed right-angled triangle ABC, a trigonometric function relationship is constructed according to the coordinate values of the points A, C and B' to obtain a deflection angle; Step 8: according to the deflection angle, the C-axis displacement table (1) is rotated to adjust the non-spherical surface generatrix to a direction perpendicular to the detection path of the detection probe (8).

2. The surface shape detecting apparatus for aspherical cylindrical lens according to claim 1, wherein The regulating platform (4) comprises a first knob (5) for adjusting the levelness.

3. The surface shape detecting apparatus for aspherical cylindrical lens according to claim 2, wherein The regulating platform (4) further comprises a regulating platform surface (41), a base (42) and an adjusting column (43) arranged between the regulating platform surface (41) and the base (42), and the first knob (5) is arranged on the adjusting column (43).

4. The surface shape detecting apparatus for aspherical cylindrical lenses according to claim 3, wherein The regulating platform surface (41), the Y-axis displacement table (3), the X-axis displacement table (2) and the C-axis displacement table (1) are connected through screws (11).

5. The surface shape detecting apparatus for aspherical cylindrical lenses according to claim 4, wherein The adjusting platform surface (41), Y-axis displacement table (3), X-axis displacement table (2), C-axis displacement table (1) are all correspondingly provided with counterbore (9) and threaded hole (10), the screw (11) connects the counterbore (9) and the threaded hole (10).

6. The surface shape detecting apparatus for aspherical cylindrical lenses according to claim 5, wherein The C-axis displacement table (1) is provided with the second knob (7) for adjusting the rotation angle of C-axis displacement table (1).

7. The surface shape detecting apparatus for aspherical cylindrical lenses according to claim 5, wherein The X-axis displacement table (2) is provided with the third knob (13) for adjusting the movement of X-axis displacement table (2) along the X-axis.

8. The surface shape detecting apparatus for aspherical cylindrical lens according to claim 5, wherein The Y-axis displacement table (3) is provided with the fourth knob (12) for adjusting the movement of Y-axis displacement table (3) along the Y-axis.

9. The surface shape detecting apparatus for aspherical cylindrical lens according to claim 1, wherein In the step 7, the deflection angle is obtained, including: In the right triangle AB'C, according to the coordinate values of points A, C and B', the following is obtained: Tan ∠A=B'C / AB' Then: ∠A=Arctan(B'C / AB') Wherein, ∠A is the deflection angle.

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