A spectrometer adjustment method

Abstract

The present invention relates to an improved spectrometer with quick adjustment, which includes a stage, a reticle, a telescope and a double-sided mirror. The telescope is provided with an objective lens. A strip-shaped reference object is arranged between the telescope and the double-sided mirror. The strip-shaped reference object is horizontally arranged and is detachably connected to the objective lens of the telescope. The strip-shaped reference object is perpendicular to the optical axis of the telescope, and the longitudinal section of the strip-shaped reference object is smaller than the longitudinal section of the objective lens of the telescope. Since the strip-shaped reference object is arranged at the lens barrel of the objective lens of the telescope, the operator can use the positional relationship between the strip-shaped reference object and its reflected image for comparative reference when adjusting the spectrometer, and then make adjustments purposefully and directionally, without blind adjustment and repeated attempts, saving time, protecting eyesight, and enhancing confidence and interest in the experiment. The present invention also relates to a method for adjusting a spectrometer.

Description

Technical Field

[0001] The present invention relates to the technical field of optical devices, and particularly to a spectrometer adjustment method. Background Art

[0002] A spectrometer generally consists of three main components: a collimator, a stage, and a telescope. A reticle is installed on the focal plane of the objective lens of the telescope. The reticle is provided with a horizontal upper crosshair, a middle crosshair, and a lower crosshair from top to bottom. A cross light source is provided on the lower crosshair, and adjustment crosshairs are provided on the upper crosshair. The cross light source and the adjustment crosshairs are symmetrical about the middle crosshair.

[0003] Spectrometer adjustment is a conventional physics experiment. The adjustment of the spectrometer needs to achieve the following points: (1) The telescope can receive parallel light (or be focused to infinity). (2) The collimator can emit parallel light. (3) The optical axis of the telescope is perpendicular to the rotation main axis of the spectrometer. (4) Adjust the normal of the stage to be parallel to the rotation main axis of the spectrometer.

[0004] Spectrometer adjustment includes visual rough adjustment and fine adjustment. The rough adjustment mainly adjusts the tilt screws of the telescope to make the telescope horizontal, and then adjusts the stage screws to make the stage horizontal.

[0005] The fine adjustment is carried out according to the following steps:

[0006] First is the eyepiece focusing, which is to enable the eyes to clearly see Figure 4 each crosshair and the cross light source on the reticle shown. Then adjust the telescope to focus on parallel light, that is, adjust the reticle to the focal plane of the objective lens. The adjustment method is as follows: Place the relative positions of the double-sided mirror and the three adjustment screws under the stage as Figure 3 placed, fix the telescope, and rotate the vernier disk with both hands. The stage rotates together. When the double-sided mirror is exactly facing the telescope, a green cross image should be seen moving in the eyepiece as the mirror surface of the double-sided mirror rotates. This is the mirror reflection image of the cross light source. If it is a bit blurry, just move the eyepiece tube along the axis until the image is clear, and then tighten the eyepiece tightening screw. Then the telescope has been focused on parallel light. When the mirror surface is perpendicular to the optical axis of the telescope, the mirror reflection image of the cross light source should fall on the adjustment crosshairs of the reticle, see Figure 4 . After the double-sided mirror rotates 180° around the axis, if the cross light source reflection image of the other mirror surface also falls here, it indicates that the mirror surface is parallel to the main axis of the spectrometer. At this time, the optical axis of the telescope perpendicular to the mirror surface is also perpendicular to the main axis of the spectrometer.

[0007] The spectrometers of the prior art have the following technical problems:

[0008] It is difficult to adjust the optical axis of the telescope to be perpendicular to the double-sided mirror. The operator is prone to blindly adjust and repeatedly try, which not only wastes time but also consumes eyesight, so that the confidence and interest in the experiment are lost. Summary of the Invention

[0009] In view of the technical problems existing in the prior art, one of the objectives of the present invention is to provide an improved spectrometer with quick adjustment, enabling an operator to quickly adjust the optical axis of the telescope to be perpendicular to the double-sided mirror, which is more convenient for adjustment.

[0010] In view of the technical problems existing in the prior art, another objective of the present invention is to provide a method for adjusting a spectrometer. By using this method, an operator can quickly adjust the optical axis of the telescope to be perpendicular to the double-sided mirror, which is more convenient for adjustment.

[0011] To achieve the above objectives, the present invention adopts the following technical solutions:

[0012] An improved spectrometer with quick adjustment includes a stage, a reticle, a telescope, and a double-sided mirror. The telescope is provided with an objective lens. A strip-shaped reference object is arranged between the telescope and the double-sided mirror. The strip-shaped reference object is horizontally arranged, detachably connected to the objective lens of the telescope, perpendicular to the optical axis of the telescope, and the longitudinal section of the strip-shaped reference object is smaller than that of the objective lens of the telescope.

[0013] Furthermore, the strip-shaped reference object includes a connecting part and a strip-shaped reference member. One end of the connecting part is detachably connected to the objective lens of the telescope, and the other end of the connecting part is fixedly connected to the strip-shaped reference member. The strip-shaped reference member is perpendicular to the optical axis of the telescope, horizontally arranged, and the longitudinal section of the strip-shaped reference member is smaller than that of the objective lens of the telescope. The strip-shaped reference member can be directly attached to the detachable sleeve at the objective lens end of the telescope barrel during the production and manufacturing of the spectrometer.

[0014] Furthermore, the strip-shaped reference member is located in the middle of the objective lens of the telescope.

[0015] Furthermore, the strip-shaped reference member is located at the 1 / 4 height of the objective lens of the telescope.

[0016] Furthermore, the connecting part is a circular ring structure, and the circular ring structure is threadedly connected to the objective lens of the telescope.

[0017] Furthermore, the connecting part is a circular ring structure, and the circular ring structure is clamped to the objective lens of the telescope.

[0018] A method for adjusting a spectrometer, using an improved spectrometer with quick adjustment for quickly making the optical axis of the telescope perpendicular to the double-sided mirror, includes the following steps

[0019] Align the telescope with the two-sided mirror. After reflection by the two-sided mirror, the objective lens Lo, the reticle P, the cross-light source S of the reticle, and the bar reference A respectively form images Lo', P', the cross virtual light source image S'', and A'. The cross-light source image S' can be regarded as the image S' obtained on the reticle P after the parallel light formed by the cross virtual light source image S'' on the reticle image P' passes through Lo' and converges through Lo.

[0020] Horizontally place the bar reference A in the middle of the objective lens Lo. Rotate the two-sided mirror around the central axis of the turntable by a certain angle until the cross virtual light source image S'' on the reticle image P' in the image of the telescope can be seen through the two-sided mirror. Use the half-adjustment method to make the image of the central reticle of the reticle P in the plane of the image P' at the same height as the bar reference A and its image A', and make the distance between the image of the central reticle of the reticle P in the plane of the image P' and the image S'' equal to the distance between the lower reticle and the central reticle.

[0021] Alternatively, horizontally place the bar reference A on the objective lens Lo at a height of 1 / 4 from the bottom of the objective lens. Rotate the two-sided mirror around the central axis of the turntable. Use the half-adjustment method to make the bar reference A, its image A', and the cross virtual light source image S'' at the same height.

[0022] After adjusting through the above steps, align the two-sided mirror with the telescope. Through the eyepiece of the telescope, it can be seen that the cross-light source image S' reflected back by the two-sided mirror is on or near the upper reticle of the reticle P.

[0023] Furthermore, use the half-adjustment method or the autocollimation adjustment method to quickly make the optical axis of the telescope perpendicular to the rotation main axis of the spectrometer, including the following steps.

[0024] Use the half-adjustment method or the autocollimation adjustment method to make the cross-light source S of the reticle coincide with the upper reticle of the reticle after being reflected by the two-sided mirror on the reticle.

[0025] Rotate the two-sided mirror by 180°. Use the half-adjustment method or the autocollimation adjustment method to make the cross-light source S of the reticle coincide with the upper reticle of the reticle after being reflected by the two-sided mirror on the reticle.

[0026] Generally speaking, the present invention has the following advantages:

[0027] Since a bar reference is provided at the objective lens barrel of the telescope, when the operator adjusts the spectrometer, the operator can use the positional relationship between the bar reference and its reflected image for comparative reference, and then adjust purposefully and directionally, without blind adjustment and repeated attempts, saving time, protecting eyesight, and increasing confidence and interest in the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the imaging optical path of Scheme A of the present invention.

[0029] Figure 2 This is a schematic diagram of the imaging optical path for Solution B of the present invention.

[0030] Figure 3 This is a schematic diagram of the placement of the two-sided mirror on the stage.

[0031] Figure 4 This is a schematic diagram of the optical path and the position of the cross image when the telescope adjustment requirements are met.

[0032] Figure 5 This is a schematic diagram of the bar-shaped reference object for Solution A.

[0033] Figure 6 This is a schematic diagram of the bar-shaped reference object for Solution B.

[0034] Explanation of reference numerals in the drawings:

[0035] P - reticle, 11 - upper crosshair, 12 - middle crosshair, 13 - lower crosshair, 14 - adjustment crosshairs, S - cross light source; 2 - two-sided mirror; 3 - stage, 31 - adjusting screw; 4 - telescope; Lo - objective lens; A - bar-shaped reference object, 51 - bar-shaped reference part, 52 - connecting part. Detailed implementation manners

[0036] In the actual use process of the spectrometer in the prior art, there are problems that are difficult to adjust, including that it is difficult to adjust the optical axis of the telescope 4 to be perpendicular to the two-sided mirror 2, and it is difficult to adjust the optical axis of the telescope 4 to be perpendicular to the rotation main axis of the spectrometer.

[0037] The present invention aims to provide an improved spectrometer with rapid adjustment and a spectrometer adjustment method, so as to first be able to quickly adjust the optical axis of the telescope 4 to be perpendicular to the two-sided mirror 2, and further on this basis, further adjust the optical axis of the telescope 4 to be perpendicular to the rotation main axis of the spectrometer.

[0038] The following will further elaborate on the present invention in detail.

[0039] As Figure 1 、 Figure 2 shown, an improved spectrometer with rapid adjustment includes a stage 3, a reticle P, a telescope 4, and a two-sided mirror 2. The telescope 4 is provided with an objective lens Lo. A bar-shaped reference object A is provided between the telescope 4 and the two-sided mirror 2. The bar-shaped reference object A is horizontally arranged. The bar-shaped reference object A is detachably connected to the objective lens Lo of the telescope 4. The bar-shaped reference object A is perpendicular to the optical axis of the telescope 4. The longitudinal section of the bar-shaped reference object A is smaller than the longitudinal section of the objective lens Lo of the telescope 4.

[0040] During specific adjustment, first rotate the stage 3 to turn the two-sided mirror 2 on the stage 3. Since there is a strip-shaped reference object A at the barrel of the objective lens Lo of the telescope 4, after the two-sided mirror 2 rotates by a certain angle, three alignment lines on the graticule P, the strip-shaped reference object A, and the reflected image of the strip-shaped reference object A can be obtained on the two-sided mirror 2. By using the positional relationship between these reflected images and adopting the half-and-half adjustment method to adjust the tilt screw of the telescope 4 and the adjustment screw 31 of the stage 3, the optical axis of the telescope 4 can be quickly adjusted to be perpendicular to the two-sided mirror 2.

[0041] Since there is a strip-shaped reference object A at the barrel of the objective lens Lo of the telescope 4, when the operator adjusts the spectrometer, he can use the positional relationship between the strip-shaped reference object A and its reflected image for comparison and reference, and then make adjustments purposefully and directionally, without blind adjustment and repeated attempts, saving time, protecting eyesight, and increasing confidence and interest in the experiment.

[0042] On the basis that the optical axis of the telescope 4 is adjusted to be perpendicular to the two-sided mirror 2, further align the telescope 4 with the two-sided mirror 2, and by adopting the half-and-half adjustment method or the autocollimation adjustment method, the optical axis of the telescope 4 can be adjusted to be perpendicular to the rotation main axis of the spectrometer.

[0043] As Figure 5 、 Figure 6 shown, the strip-shaped reference object A includes a connecting part 52 and a strip-shaped reference member 51. One end of the connecting part 52 is detachably connected to the end of the sleeve of the objective lens Lo of the telescope 4, and the other end of the connecting part 52 is fixedly connected to the strip-shaped reference member 51. The strip-shaped reference member 51 is perpendicular to the optical axis of the telescope 4, the strip-shaped reference member 51 is horizontally arranged, and the longitudinal section of the strip-shaped reference member 51 is smaller than the longitudinal section of the objective lens Lo of the telescope 4.

[0044] Specifically, the strip-shaped reference member 51 is a linear reference member and can be made of materials such as plastic, polyester, or metal. By using the connecting part 52 to attach the strip-shaped reference member 51 to the objective lens Lo of the telescope 4, the installation or disassembly of the strip-shaped reference member 51 is made more convenient. The strip-shaped reference member 51 is horizontally arranged, making it easy for the operator to judge the positional relationship between the reflected images with the eyes and make corresponding adjustments using the half-and-half adjustment method according to their height difference. The longitudinal section of the strip-shaped reference member 51 is smaller than the longitudinal section of the objective lens Lo of the telescope 4, so that the strip-shaped reference member 51 can provide a position reference function without affecting the light passing through the objective lens Lo and without interfering with the observation of the reflected image of the cross light source S and other images.

[0045] The strip-shaped reference member 51 is located in the middle of the objective lens Lo of the telescope 4. Alternatively, the strip-shaped reference member 51 is located at 1 / 4 of the height of the objective lens Lo of the telescope 4. With these two structures, the strip-shaped reference object A can obtain reflected images at two different positions on the double-sided mirror 2. By using the positional relationships between each reflected image and these two different-positioned reflected images respectively, the optical axis of the telescope 4 can be quickly adjusted to be perpendicular to the double-sided mirror 2.

[0046] The connecting portion 52 is of an annular structure, and the annular structure is threadedly connected to the objective lens Lo of the telescope 4. Alternatively, the connecting portion 52 is of an annular structure, and the annular structure is snap-connected to the objective lens Lo of the telescope 4. Through threaded connection or snap connection, the strip-shaped reference member 51 can be quickly installed on the barrel of the objective lens Lo of the telescope 4, which is relatively convenient to use.

[0047] A spectrometer adjustment method, using an improved spectrometer with rapid adjustment, for quickly making the optical axis of the telescope 4 perpendicular to the double-sided mirror 2, includes the following steps.

[0048] Align the telescope 4 with the double-sided mirror 2. After reflection by the double-sided mirror 2, the objective lens Lo, the reticle P, the cross-light source S of the reticle P, and the strip-shaped reference object A respectively obtain images Lo', P', S'', and A'. The cross virtual light source image S'' on the image P' forms parallel light after passing through Lo' and converges through Lo, and then the image S' is obtained on the reticle P.

[0049] Horizontally place the strip-shaped reference object A in the middle of the objective lens Lo, rotate the double-sided mirror 2 around the central axis of the turntable 3 by a small angle until the cross virtual light source image S'' on the reticle image P' in the image of the telescope 4 can be seen through the double-sided mirror 2. Using the half-and-half adjustment method, make the center alignment line 12 of the reticle P in the plane of the image P' at the same height as the strip-shaped reference object A and its image A', and make the distance between the center alignment line 12 of the reticle P in the plane of the image P' and the image S'' equal to the distance between the lower alignment line 13 and the center alignment line 12 of the reticle P.

[0050] Alternatively, horizontally place the strip-shaped reference object A on the objective lens Lo and at a distance of 1 / 4 of the height of the objective lens Lo from the bottom of the objective lens Lo. Rotate the double-sided mirror 2 around the central axis of the turntable 3, and using the half-and-half adjustment method, make the strip-shaped reference object A, the image A', and the cross virtual light source image S'' at the same height.

[0051] Specifically, the spectrometer adjustment method includes Scheme A and Scheme B.

[0052] Scheme A includes the following steps:

[0053] As Figure 1As shown in the figure, first install the bar reference A in the middle of the objective lens Lo end of the telescope 4, and keep the bar reference A approximately horizontal, that is, the objective lens Lo is symmetrically up and down with the bar reference A as the axis, make the telescope 4 face the double-sided mirror 2, observe whether there is a cross image in the telescope 4. If there is, rotate the turntable 3 to drive the double-sided mirror 2 to rotate 180°. Continue to observe whether there is a cross image in the telescope 4. If there is still one, it indicates that the optical axis of the telescope 4 is basically perpendicular to the double-sided mirror 2.

[0054] If no cross image is observed in the telescope 4, rotate the double-sided mirror 2 around the central axis of the turntable 3 by a small angle until the cross virtual light source image S'' on the reticle image P' of the image of the telescope 4 can be seen through the double-sided mirror 2. Observe the image A' of the bar reference A in the double-sided mirror 2 with the eye and the cross virtual light source image S'' of the cross light source S in the reticle P plane that appears in the telescope 4 sleeve after rotating a certain angle. Keep the eye at the same level as the bar reference A and its image A'. Then observe the positional relationship between the image of the center line 12 in the reflected image P' plane and the plane where the bar reference A and its image A' are located. If the image of the center line 12 in the image P' plane is above them (if the image of the center line 12 cannot be clearly seen, the center line 12 of the circular plane image of the reticle P can be used as the judgment basis), the inclination screw of the telescope 4 and the adjustment screw 31 of the turntable 3 can be adjusted by the half-and-half adjustment method to make the image of the center line 12 in the image P' plane flush with the plane where the bar reference A and its image A' are located, and vice versa. If the image of the center line 12 in the image P' plane cannot be clearly seen, observe whether the position of the image S'' is at a position 1 / 4 of the height from the bottom of the image P'. If so, it indicates that the optical axis of the telescope 4 is approximately perpendicular to the double-sided mirror 2. If not, adjust according to the position of the reflected image S'' of the cross light source S in the sleeve. If the image S'' is below the image P' plane, the inclination screw of the telescope 4 and the adjustment screw 31 of the turntable 3 can be adjusted by the half-and-half adjustment method to make the image S'' at a position 1 / 4 from the bottom of the image P', and vice versa. At this time, the optical axis of the telescope 4 is perpendicular to the double-sided mirror 2.

[0055] Scheme B includes the following steps:

[0056] As Figure 2 shown in the figure, first install the bar reference A at the objective lens Lo end of the telescope 4 and at a position 1 / 4 of the height of the objective lens Lo from the bottom of the objective lens Lo, and keep the bar reference A approximately horizontal, make the telescope 4 barrel face the double-sided mirror 2, observe whether there is a cross image in the telescope 4. If there is, rotate the turntable 3 to drive the double-sided mirror 2 to rotate 180°. Continue to observe whether there is a cross image in the telescope 4. If there is still one, it indicates that the optical axis of the telescope 4 is basically perpendicular to the double-sided mirror 2.

[0057] If no cross image is observed in the telescope 4, rotate the double-sided mirror 2, and observe with the eyes the image A' of the bar-shaped reference object A in the double-sided mirror 2 and the cross virtual light source image S'' of the cross light source S of the graticule P that appears in the barrel of the telescope 4 after being rotated by a certain angle. Keep the eyes at the same level as the bar-shaped reference object A and its image A'.

[0058] If the bar-shaped reference object A, the image A', and the image S'' are at the same height, it indicates that the optical axis of the telescope 4 is perpendicular to the double-sided mirror 2. If they are not at the same height, adjust according to the position of the cross virtual light source image S'' of the cross light source S in the barrel. If the image S'' is below the plane of the image P', the half-and-half adjustment method can be used to adjust the tilt screw of the telescope 4 and the adjustment screw 31 of the stage 3 to adjust A, A', and S'' to the same height. At this time, the optical axis of the telescope 4 is perpendicular to the double-sided mirror 2.

[0059] After the adjustment of Scheme A or Scheme B, the reflected image of the cross light source S on the graticule P is basically on or near the upper alignment line 11 of the graticule P.

[0060] Using the adjustment method of the spectrometer of the present invention for adjustment, the bar-shaped reference object A at the barrel of the objective lens Lo of the telescope 4 and its reflected image are used for comparison and reference, so as to adjust purposefully and directionally, without blind adjustment and repeated attempts, saving time, protecting eyesight, and enhancing the operator's confidence and interest in the experiment.

[0061] Furthermore, the spectrometer adjustment method is also used to quickly make the optical axis of the telescope 4 perpendicular to the rotation main axis of the spectrometer, including the following steps

[0062] Align the telescope 4 with the double-sided mirror 2. According to the position of the cross image, use the half-and-half adjustment method or the autocollimation adjustment method to make the reflected image S' of the cross light source S of the graticule P on the graticule P after being reflected by the double-sided mirror 2 coincide with the upper alignment line 11 of the graticule P;

[0063] Rotate the double-sided mirror 2 by 180°. Use the half-and-half adjustment method or the autocollimation adjustment method to make the reflected image S' of the cross light source S of the graticule P on the graticule P after being reflected by the double-sided mirror 2 coincide with the upper alignment line 11 of the graticule P. At this time, the optical axis of the telescope 4 is perpendicular to the rotation main axis of the spectrometer. Through further adjustment, the reflected image S' of the cross light source S can be made to coincide with the adjustment crosshair 14 to complete the entire adjustment process of the spectrometer.

[0064] Both the half-and-half adjustment method and the autocollimation adjustment method are existing technologies and will not be elaborated here.

[0065] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A spectrometer adjustment method, characterized in that: A spectrometer with rapid adjustment is used to quickly make the optical axis of the telescope perpendicular to the double-sided mirror. The spectrometer includes a stage, a reticle, a telescope, and a double-sided mirror. The telescope is provided with an objective lens. A bar-shaped reference object is arranged between the telescope and the double-sided mirror. The bar-shaped reference object includes a connecting part and a bar-shaped reference piece. One end of the connecting part is detachably connected to the objective lens of the telescope, and the other end of the connecting part is fixedly connected to the bar-shaped reference piece. The bar-shaped reference piece is perpendicular to the optical axis of the telescope, the bar-shaped reference piece is horizontally arranged, and the longitudinal section of the bar-shaped reference piece is smaller than the longitudinal section of the objective lens of the telescope. The bar-shaped reference piece is located in the middle of the objective lens of the telescope; or, the bar-shaped reference piece is located at 1 / 4 of the height of the objective lens of the telescope. The adjustment method includes the following steps. The telescope is directed at the double-sided mirror. After reflection by the double-sided mirror, the objective lens Lo, the reticle P, the cross-light source S of the reticle, and the bar-shaped reference object A respectively obtain images Lo', P', the cross virtual light source image S'', and A'. After the cross virtual light source image S'' on the image P' forms parallel light through the image Lo' and converges through the objective lens Lo, an image S' is obtained on the reticle P. The bar-shaped reference object A is horizontally arranged in the middle of the objective lens Lo. The double-sided mirror is rotated around the central axis of the stage. Using the half-and-half adjustment method, the midline of the reticle P in the plane of the image P' is at the same height as the bar-shaped reference object A and its image A', and the distance between the midline of the reticle P in the plane of the image P' and the image S'' is equal to the distance between the lower line and the midline. Or, the bar-shaped reference object A is horizontally arranged on the objective lens Lo at a height of 1 / 4 from the bottom of the objective lens. The double-sided mirror is rotated around the central axis of the stage. Using the half-and-half adjustment method, the bar-shaped reference object A, the image A', and the cross virtual light source image S'' are at the same height.

2. A spectrometer adjustment method according to claim 1, characterized in that: It is also used to quickly make the optical axis of the telescope perpendicular to the rotation main axis of the spectrometer. It includes the following steps. Using the half-and-half adjustment method or the autocollimation adjustment method, make the image S' of the cross-light source S of the reticle on the reticle after reflection by the double-sided mirror coincide with the upper line of the reticle. Rotate the double-sided mirror 180°. Using the half-and-half adjustment method or the autocollimation adjustment method, make the image S' of the cross-light source S of the reticle on the reticle after reflection by the double-sided mirror coincide with the upper line of the reticle.

3. A spectrometer adjustment method according to claim 1, characterized in that: The connecting part is a ring structure, and the ring structure is threadedly connected to the objective lens of the telescope.

4. A spectrometer adjustment method according to claim 1, characterized in that: The connecting part is a ring structure, and the ring structure is clamped to the objective lens of the telescope.

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