CN218068429U - Zoom lens adopting visible light measurement - Google Patents
Zoom lens adopting visible light measurement Download PDFInfo
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- CN218068429U CN218068429U CN202220912782.6U CN202220912782U CN218068429U CN 218068429 U CN218068429 U CN 218068429U CN 202220912782 U CN202220912782 U CN 202220912782U CN 218068429 U CN218068429 U CN 218068429U
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Abstract
The utility model relates to the technical field of lenses, in particular to a zoom lens adopting visible light measurement, which comprises a main zoom lens and a spectrum confocal lens, wherein the spectrum confocal lens comprises a spectrum measuring head and a spectrum lens module, the spectrum measuring head comprises a visible light source and a spectrum receiver, and the visible light source is used for emitting a visible light beam; visible light beams emitted by the visible light source reach the first light splitting part after passing through the spectrum lens module, the visible light beams are reflected to the front end lens module through the first light splitting part, the visible light beams reach the object surface after passing through the front end lens module, and the object surface reflects the visible light beams back to the spectrum receiver in an original way; the object plane sequentially passes through the front lens module, the first light splitter and the zoom lens module and then is imaged in an image space. The utility model provides a pair of adopt zoom lens of visible light measurement, measurement of efficiency is high, and does not influence the formation of image of object plane.
Description
Technical Field
The utility model belongs to the technical field of the camera lens technique and specifically relates to indicate an adopt zoom lens of visible light measurement.
Background
The present common structure combination mode of the zoom lens and the spectrum confocal lens is that the spectrum confocal lens and the zoom lens are set to be two independent structures, which is convenient for assembly, but when measuring, the spectrum confocal lens is required to be transferred to the upper part of a product for focusing measurement, and then the zoom lens is moved to the upper part of the product for measuring the parameters of the product.
Disclosure of Invention
The utility model discloses problem to prior art provides an adopt variable power camera lens of visible light measurement, set up spectrum confocal camera lens and main zoom camera lens into coaxial structure, can improve measuring efficiency, avoid moving the camera lens often in the measurement process, and through the light splitting that sets up first beam splitter than, make the object plane can receive sufficient light energy, and can have sufficient light energy reflection to the image space, the measurement and the illumination of supplementary object plane do not just influence the formation of image of object plane.
In order to solve the technical problem, the utility model discloses a following technical scheme: a zoom lens adopting visible light measurement comprises a main zoom lens and a spectrum confocal lens, wherein the spectrum confocal lens comprises a spectrum measuring head and a spectrum lens module, the spectrum measuring head comprises a visible light source and a spectrum receiver, the visible light source is used for emitting visible light beams, and the main zoom lens comprises an image space, a zoom lens module, a first light splitter and a front end lens module; a first light splitting coating is arranged on the light splitting surface of the first light splitting piece; the spectral ratio of the first light-splitting coating film to visible light with a waveband of 400nm-680nm is R: t =5:5; visible light beams emitted by the visible light source reach the first light splitting part after passing through the spectrum lens module, the visible light beams are reflected to the front end lens module through the first light splitting part, the visible light beams reach the object plane after passing through the front end lens module, and the object plane reflects the original path of the visible light beams back to the spectrum receiver; the object plane is imaged in the image space after sequentially passing through the front-end lens module, the first light splitting piece and the zoom lens module.
Preferably, the zoom lens using visible light measurement further comprises a coaxial light module, visible light emitted by the coaxial light module is reflected to the front-end lens module through the first light splitter, reaches the object plane after passing through the front-end lens module, is reflected by the object plane and reaches the image space after passing through the front-end lens module, the first light piece and the zoom lens module in sequence, and is used for assisting illumination of the object plane.
Preferably, the spectral confocal lens further comprises a second beam splitter, and the first beam splitter and the second beam splitter are located on the same horizontal line; the visible light beam reaches the first light splitting part through reflection of the second light splitting part after passing through the spectrum lens module, and the visible light emitted by the coaxial light module reaches the first light splitting part after passing through the second light splitting part.
Preferably, the light splitting surface of the second light splitting part is provided with a second light splitting coating.
Preferably, the spectral confocal lens further comprises a front lens barrel and a rear lens barrel communicated with the front lens barrel, the spectral lens module is arranged on the front lens barrel, and the second beam splitter is arranged on the rear lens barrel; the coaxial optical mode assembly is arranged on one side of the rear end lens barrel and is communicated with the rear end lens barrel; the other side of the rear end lens barrel is arranged on the main zoom lens and is communicated with the main zoom lens.
Preferably, the front lens module is fully transmissive to visible light.
The utility model has the advantages that:
1. the spectral confocal lens and the main zoom lens are coaxially arranged, so that the measurement error caused by moving the lens in the detection process can be avoided, and the measurement efficiency is effectively improved;
2. the splitting ratio of the splitting surface of the first light splitting part is R: t =5: and 5, strong light spots are not formed on the object surface, and the illumination and focusing functions of the object surface can be assisted.
Drawings
Fig. 1 is a schematic structural view of the present invention;
the reference numerals in fig. 1 include:
1-main zoom lens, 2-spectrum measuring head, 3-spectrum lens module, 4-image space, 5-zoom lens module, 6-first beam splitter, 7-front lens module, 9-second beam splitter, 10-front lens cone, 11-rear lens cone, and 12-coaxial optical module.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.
The zoom lens using visible light measurement provided in this embodiment, as shown in fig. 1, includes a main zoom lens 1 and a spectrum confocal lens, where the spectrum confocal lens includes a spectrum probe 2 and a spectrum lens module 3, the spectrum probe 2 includes a visible light source and a spectrum receiver, the visible light source is used to emit a visible light beam, and the main zoom lens 1 includes an image space 4, a zoom lens module 5, a first beam splitter 6 and a front lens module 7; preferably, a first light splitting coating is arranged on the light splitting surface of the first light splitting part 6; the spectral ratio of the first light-splitting coating film to visible light with a waveband of 400nm-680nm is R: t =5:5; the front lens module 7 is totally transmissive to visible light.
The specific light beam propagation path is as follows: visible light beams emitted by the visible light source reach the first light splitting part 6 after passing through the spectrum lens module 3, the visible light beams are reflected to the front end lens module 7 through the first light splitting part 6, the visible light beams reach an object plane after passing through the front end lens module 7, and the object plane reflects the visible light beams back to the spectrum receiver in an original path; the object plane is imaged on the image space 4 after sequentially passing through the front lens module 7, the first light splitter 6 and the zoom lens module 5.
Specifically, the visible light beam is reflected to the front end lens module 7 by the first light splitting part 6 after passing through the spectrum lens module 3, the visible light beam is processed to reach the object plane through the optical path of the front end lens module 7, the object plane reflects the visible light beam and returns to the spectrum receiver of the spectrum measuring head 2 after passing through the front end lens module 7, the first light splitting part 6 and the spectrum lens module 3 in sequence, and since each product with a certain thickness has at least two object planes, a certain optical path difference is generated between the visible light beams reflected to the spectrum receiver between the two object planes, so that the spectrum confocal lens can measure the height, the thickness and the like of the object according to the optical path reflected by the object planes and the optical path difference, and the purposes of auxiliary focusing and auxiliary measuring of the main zoom lens 1 are achieved. The spectrum confocal lens of this embodiment and the public front end lens module 7 of main zoom lens 1 can focus and measure the object plane simultaneously, effectively improves measurement of efficiency, and can avoid the measuring error who removes the in-process and produce, and simultaneously, the spectral ratio of the first beam splitter 6 to the visible light of 400nm-680 nm's wave band is R: t =5:5, the energy of the visible light beam is lost in the process of moving to the object plane, so that no strong light spot is formed when the energy reaches the object plane, and the illumination of the object plane can be assisted to a certain extent.
Further, as shown in fig. 1, the zoom lens using visible light measurement further includes a coaxial light module 12, the visible light emitted by the coaxial light module 12 is reflected to the front end lens module 7 through the first beam splitter 6, the visible light reaches the object plane after passing through the front end lens module 7, the visible light is reflected by the object plane and reaches the image space 4 after sequentially passing through the front end lens module 7, the first light and the zoom lens module 5, and the visible light is used for assisting illumination of the object plane.
Specifically, this embodiment still is provided with coaxial optical module 12, coaxial optical module 12 is the same with zoom lens sharing front end lens module 7, the light that coaxial optical module 12 sent through first beam splitter 6's reflection, through shared front end lens module 7 again, reachs the object plane, for the object plane increases the illumination, the light transmission first beam splitter 6 of object plane reflection reachs image space 4 after passing zoom lens module 5, lets the user can observe more clearly.
Further, as shown in fig. 1, the spectral confocal lens further includes a second light splitter 9, and the first light splitter 6 and the second light splitter 9 are located on the same horizontal line; the visible light beam reaches the first light splitter 6 through the reflection of the second light splitter 9 after passing through the spectrum lens module 3, and the visible light emitted by the coaxial light module 12 reaches the first light splitter 6 after passing through the second light splitter 9. Wherein, the light splitting surface of the second light splitting part 9 is provided with a second light splitting coating film; the splitting ratio of the second splitting coating film to visible light with a wavelength range of 400nm to 680nm can be set according to actual requirements, and if the splitting ratio is R: t =5: 5. the splitting ratio is R: t =4: 6. the splitting ratio is R: t =3: 7. the splitting ratio is R: t =2: 8. the splitting ratio is R: t =1:9, etc., according to the actual light energy requirement, setting the splitting ratio.
Specifically, as shown in fig. 1, the assembly structure of the coaxial optical module 12 and the spectral confocal lens includes a second dichroic 9, a second dichroic coating is disposed on a splitting surface of the second dichroic 9, and the splitting ratio of the second dichroic coating to visible light is R: t =5: for example 5, the light energy of the visible light of the spectral confocal lens transmitted by the second beam splitter 9 and the visible light transmitted by the coaxial optical module 12 through the second beam splitter 9 are added, so that the energy of the visible light reaching the object plane is equivalent to all the energy of the coaxial optical module 12, that is, the auxiliary illumination effect on the object plane is not affected by the second beam splitter 9, and in addition, since the light energy on the object plane is not affected by the second beam splitter 9, the light energy reflected by the object plane back to the spectral measuring head 2 is not weakened, and the auxiliary focusing function can still be achieved. In the embodiment, the second light splitting part 9 is arranged, so that simultaneous arrangement of spectrum focusing and coaxial illumination is realized, and sufficient and appropriate light energy can be kept to assist illumination and focusing. In addition, the reflectivities of the other light transmitting surfaces of the first and second light-splitting members 6 and 9, except for the first and second light-splitting coatings, to light having a wavelength band of 400nm to 1000nm are R <0.7.
In the zoom lens using visible light measurement according to the present embodiment, as shown in fig. 1, the spectral confocal lens further includes a front end lens barrel 10 and a rear end lens barrel 11 communicated with the front end lens barrel 10, the spectral lens module 3 is mounted on the front end lens barrel 10, and the second beam splitter 9 is mounted on the rear end lens barrel 11; the coaxial optical module 12 is arranged on one side of the rear end lens barrel 11 and is communicated with the rear end lens barrel 11; the other side of the rear end lens barrel 11 is arranged on the main zoom lens 1 and is communicated with the main zoom lens 1.
Specifically, the spectrum confocal lens is set as two parts, the spectrum lens module 3 and the second beam splitter 9 can be assembled respectively, and the assembly with the coaxial optical module 12 and the lens of the main zoom lens 1 is also facilitated, the assembly mode is the prior art, and details are not specifically described in this embodiment.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.
Claims (6)
1. A zoom lens adopting visible light measurement is characterized in that: the optical fiber zooming device comprises a main zoom lens and a spectrum confocal lens, wherein the spectrum confocal lens comprises a spectrum measuring head and a spectrum lens module, the spectrum measuring head comprises a visible light source and a spectrum receiver, the visible light source is used for emitting visible light beams, and the main zoom lens comprises an image space, a zoom lens module, a first light splitting part and a front end lens module;
a first light splitting coating is arranged on the light splitting surface of the first light splitting part; the spectral ratio of the first light-splitting coating film to visible light with a waveband of 400nm-680nm is R: t =5:5;
visible light beams emitted by the visible light source reach the first light splitting part after passing through the spectrum lens module, the visible light beams are reflected to the front end lens module through the first light splitting part, the visible light beams reach the object plane after passing through the front end lens module, and the object plane reflects the original path of the visible light beams back to the spectrum receiver;
the object plane is imaged in the image space after sequentially passing through the front-end lens module, the first light splitting piece and the zoom lens module.
2. The zoom lens using visible light measurement according to claim 1, wherein: the zoom lens adopting visible light measurement further comprises a coaxial light module, visible light emitted by the coaxial light module is reflected to the front-end lens module through the first light splitter, reaches the object plane after passing through the front-end lens module, is reflected by the object plane and reaches the image space after sequentially passing through the front-end lens module, the first light piece and the zoom lens module, and is used for assisting illumination of the object plane.
3. The zoom lens using visible light measurement according to claim 2, wherein: the spectrum confocal lens further comprises a second light splitting part, and the first light splitting part and the second light splitting part are positioned on the same horizontal line; visible light beams reach the first light splitting piece through reflection of the second light splitting piece after passing through the spectrum lens module, and visible light emitted by the coaxial light module reaches the first light splitting piece after passing through the second light splitting piece.
4. The zoom lens using visible light measurement according to claim 3, wherein: and the light splitting surface of the second light splitting piece is provided with a second light splitting coating.
5. The zoom lens according to claim 3, wherein: the spectrum confocal lens also comprises a front end lens barrel and a rear end lens barrel communicated with the front end lens barrel, the spectrum lens module is arranged on the front end lens barrel, and the second beam splitter is arranged on the rear end lens barrel;
the coaxial optical mode assembly is arranged on one side of the rear end lens barrel and is communicated with the rear end lens barrel;
the other side of the rear end lens barrel is arranged on the main zoom lens and is communicated with the main zoom lens.
6. The zoom lens using visible light measurement according to claim 1, wherein: the front lens module is fully transmissive to visible light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220912782.6U CN218068429U (en) | 2022-04-19 | 2022-04-19 | Zoom lens adopting visible light measurement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220912782.6U CN218068429U (en) | 2022-04-19 | 2022-04-19 | Zoom lens adopting visible light measurement |
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| Publication Number | Publication Date |
|---|---|
| CN218068429U true CN218068429U (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220912782.6U Active CN218068429U (en) | 2022-04-19 | 2022-04-19 | Zoom lens adopting visible light measurement |
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| CN (1) | CN218068429U (en) |
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- 2022-04-19 CN CN202220912782.6U patent/CN218068429U/en active Active
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